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Description
Ultibo BCM2708 Interface unit
This unit provides the BCM2708 specific implementations of the following devices:
- SPI0
- I2C0
- I2C1
- I2C2
- SPI1
- SPI2
- I2C Slave
- SPI Slave
- DMA
- PWM0
- PWM1
- PCM
- GPIO
- UART0
- UART1
- SDHCI (eMMC)
- Clock
- ARM Timer
- Random
- Mailbox
- Watchdog
- Framebuffer
- MIPI CSI-2 (Camera Serial Interface)
- DSI (Display Serial Interface)
BCM2708 SPI0 Device
The BCM2708 has a single master mode SPI controller that supports 3 wire, 2 wire and LoSSI modes of operation. It also has 2 auxiliary SPI masters which do not support DMA mode (see SPI1/2 below).
The main SPI0 controller supports polled, interrupt and DMA modes and includes 3 chip selects although only CS0 and 1 are available on the 26 or 40 pin header.
By default SPI0 can appear on GPIO pins 7 to 11 (CS1, CS0, MISO, MOSI, SCLK) using alternate function 0 or on GPIO pins 35 to 39 (CS1, CS0, MISO, MOSI, SCLK) using alternate function 0, only pins 7 to 11 are available on the header.
BCM2708 I2C0/1/2 Device
The BCM2708 has 3 Broadcom Serial Controller (BSC) devices which are fast mode (400Kz) masters numbered BSC0, BSC1 and BSC2.
Device BSC2 is dedicated to the HDMI interface but can be accessed by the ARM processor for controlling some HDMI functionality. All BSC devices contain a 16 byte FIFO, support 7 bit and 10 bit addressing and have software configurable clock timing.
By default BSC0 can appear on GPIO pins 0 and 1 (Alternate function 0), 28 and 29 (Alternate function 0) or 44 and 45 (Alternate function 1). Unfortunately on all except the Revision 1 models none of these pins are available on the 26 or 40 pin header.
Note: On the Raspberry Pi A+/B+/Zero/2B/3B the ID EEPROM pins on the 40 pin header are actually connected to GPIO 0 and 1 (BSC0)
Device BSC1 can appear on GPIO pins 2 and 3 (Alternate function 0) or 44 and 45 (Alternate function 2) but only pins 2 and 3 are exposed on the 26 or 40 pin header.
BCM2708 SPI1/2 Device
The BCM2708 has 2 additional SPI universal masters available as part of the AUX device which support interrupt mode but not DMA and therefore only allow limited bandwidth transfers due to the CPU overhead required to sustain high data rates.
Both devices support 3 chip selects, by default SPI1 is available on GPIO pins 16 to 21 (CS2, CS1, CS0, MISO, MOSI, SCLK) using alternate function 4 and SPI2 is available on GPIO pins 40 to 45 (MISO, MOSI, SCLK, CS0, CS1, CS2) using alternate function 4. Only pins 16 to 21 are available on the header and only on the 40 pin header of the Raspberry Pi A+/B+/Zero/2B/3B.
BCM2708 SPI/I2C Slave Device
The slave device can be used as either an I2C or an SPI interface, the I2C slave supports 400KHz fast mode operation. Only 7 bit addressing is supported, DMA is not supported and neither is clock stretching.
Note: On the Raspberry Pi A+/B+/Zero/2B/3B the SPI slave device is apparently faulty and cannot be used.
The I2C Slave device can only appear on GPIO pins 18 (SDA) and 19 (SCL) (Alternate function 3).
BCM2708 DMA Device
The DMA controller has 16 channels in total although not all are available for software to use as some are already used by the GPU.
The firmware will pass the value dma.dmachans on the command line which will indicate which channels are available for our use.
Channels 0 to 6 are normal channels which support 2D stride and transfers up to 1GB per control block
Channels 7 to 14 are Lite channels which do not support stride and only allow transfers up to 64KB per control block
Channel 15 is not mentioned in most documentation and is shown as not available in the mask passed in dma.dmachans
Channel 0 and 15 are Bulk channels which have an additional FIFO for faster transfers (8 beat burst per read)
BCM2708 PWM0/1 Device
The BCM2708 has a single PWM controller with 2 independent output bit streams with multiple algorithms for generating the output pulse. The PWM controller supports either a single data register (independent per channel) or a 16 x 32 FIFO which also supports DMA mode transmission.
On the Raspberry Pi PWM0 and PWM1 are also connected via GPIO pins 40 and 45 (40 and 41 on the Raspberry Pi 3B) to the audio circuit and allow playback of digital audio signals via the 3 or 4 pole line jack (depending on model).
PWM0 is available on GPIO pins 12 (function 0), 18 (function 5), 40 (function 0) and 52 (function 1).
PWM1 is available on GPIO pins 13 (function 0), 19 (function 5), 41, 45 (function 0) and 53 (function 1).
On the Raspberry Pi A and B only pin 18 is exposed on the 26 pin header.
On the Raspberry Pi A+/B+/Zero/2B/3B pins 12, 13, 18 and 19 are exposed on the 40 pin header.
BCM2708 GPIO Device
The GPIO has 54 pins available each with multiple alternate functions. All pins can be configured as input or output and all can have pull up or down applied.
Not all pins are exposed on the 26 or 40 pin header of the Raspberry Pi, for details of which pins are available see:
Raspberry Pi A and B - https://www.raspberrypi.org/documentation/usage/gpio/README.md
Raspberry Pi A+/B+/2B/3B/Zero - https://www.raspberrypi.org/documentation/usage/gpio-plus-and-raspi2/README.md
Some of the 54 pins are used for peripheral communication (such as the SD card) and are not available for general use, take care when changing function selects on pins to avoid disabling certain system peripherals.
Event detection can be enabled for both high and low levels as well as rising and falling edges, there is also an asynchronous rising or falling edge detection which can detect edges of very short duration.
BCM2708 UART0 Device
The UART0 device is an ARM PL011 UART which supports programmable baud rates, start, stop and parity bits and hardware flow control and many others. The UART0 is similar to the industry standard 16C650 but with a number of differences, the PL011 has some optional features such as IrDA, Serial InfraRed and DMA which are not supported by the Broadcom implementation. In the standard configuration the UART0 TX and RX lines are connected to GPIO pins 14 and 15 respectively (Alternate function 0) but they can be remapped via GPIO function selects to a number of other locations. On the Raspberry Pi (all models) none of these alternate pin mappings are exposed via the 26 or 40 pin header and therefore cannot be used easily. This means that UART0 and UART1 cannot be used at the same time.
On the Raspberry Pi 3B the UART0 can be mapped to GPIO pins 32 and 33 (Alternate function 3) to communicate with the built in Bluetooth module.
BCM2708 UART1 Device
The UART1 device is a Broadcom implementation that is part of the AUX device which also includes the SPI1 and SPI2 devices. This device is termed a Mini UART and has a smaller feature set than the PL011 UART but still supports a fairly standard communication protocol with programmable baud rate and hardware flow control.
The Mini UART is similar to the standard 16550 device but is missing some of the features, the device also has no DMA support so high speed transfers will produce a higher CPU load. In the standard configuration the UART1 TX and RX lines are connected to GPIO pins 14 and 15 respectively (Alternate function 5) but they can be remapped via GPIO function selects to a number of other locations. On the Raspberry Pi (all models) none of these alternate pin mappings are exposed via the 26 or 40 pin header and therefore cannot be used easily. This means that UART0 and UART1 cannot be used at the same time.
On the Raspberry Pi 3B the UART1 can be mapped to GPIO pins 32 and 33 (Alternate function 5) to communicate with the built in Bluetooth module.
BCM2708 SDHCI Device
The SDHCI controller on the BCM2708 is an Arasan SD Host controller.
The Card Detect pin is connected to GPIO pin 47 (on the RPi Model A/B)(Not connected on the RPi Model A+/B+)
The Write Protect pin is not connected.
The device can be routed to GPIO pins 22 to 27 (ALT3) or 48 to 53 (ALT3), it can also be routed to GPIO pins 34 to 39 (ALT3) to provide an SDIO controller for the on board WiFi.
BCM2708 SDHOST Device
The SDHOST controller on the BCM2708 is a non SDHCI-compliant device which requires a specific driver.
It can be routed to GPIO pins 22 to 27 (ALT0) or 48 to 53 (ALT0) in order to control the SD card slot when the SDHCI device is being used for the on board WiFi.
Note: The actual driver is implemented in the BCMSDHOST unit.
BCM2708 Clock (System Timer) Device
The clock device in the BCM2708 is based on the System Timer which is a 64 bit free running counter that runs at 1MHz regardless of core or CPU clock speeds. The System Timer cannot be stopped and the counter cannot be set or reset.
The System Timer includes 4 compare registers which can each generate an interrupt when the compare value is matched, however 2 of the 4 are consumed by the GPU and on the Raspberry Pi A/B/A+/B+/Zero the other 2 are used for the scheduler and clock interrupts in Ultibo.
This device simply exposes the free running counter as a clock value and does not provide access to the timer compare functionality or to interrupt based events, for those see the timer devices below.
BCM2708 Clock (ARM Timer) Device
This device represents that free running counter from the ARM Timer device (below) as a clock device. The free running counter does not appear in the original SP804 timer. The counter is 32 bits wide and has its own divider that is 8 bits wide meaning that it can be set to clock rates of between 975KHz and 250MHz (or 1.5MHz to 400MHz on the Raspberry Pi 3B).
The counter does not generate an interrupt and cannot be set or reset but it can be stopped and started.
BCM2708 ARM Timer Device
The ARM Timer device in the BCM2708 is based on the ARM SP804 timer with some modifications and additions. In the Raspberry Pi it is connected to the core clock which by default is 250MHz but was increased to 400MHz on the Raspberry Pi 3B.
The divider is 10 bits wide which means that the ARM Timer can be set to clock rates of between 250KHz and 250MHz (or 400KHz to 400MHz on the Raspberry Pi 3B). Both the counter and the load/reload value are 32 bits wide by default giving a wide range of tick intervals.
The ARM Timer features a free running counter which is not enabled or used by this driver and a down counter which operates in wrapping mode so that each time it reaches 0 it triggers an interrupt and reloads the value from a load or reload register to begin counting again.
Constants
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BCM2708 SPI0 BCM2708_SPI0_*
BCM2708_SPI0_DESCRIPTION = 'BCM2835 SPI0 Master';
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BCM2708_SPI0_MAX_SIZE = $FFFF;
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BCM2708_SPI0_MIN_CLOCK = 3814;
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Default minimum based on the default settings from the firmware (Recalculated during open)
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BCM2708_SPI0_MAX_CLOCK = 125000000;
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Default maximum based on the default settings from the firmware (Recalculated during open)
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BCM2708_SPI0_MIN_DIVIDER = 2;
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Divider is always rounded down to an even number and a value of 0 sets the divider to 65536
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BCM2708_SPI0_MAX_DIVIDER = $FFFE;
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Divider is always rounded down to an even number
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BCM2708_SPI0_CORE_CLOCK = 250000000;
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Default core clock based on the default settings from the firmware (Requested from firmware during start)
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BCM2708_SPI0_MODE_IRQ = 0;
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BCM2708_SPI0_MODE_DMA = 1;
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BCM2708_SPI0_MODE_PIO = 2;
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BCM2708 BSCI2C (BSC0/1/2) BCM2708_BSCI2C_*
BCM2708_BSCI2C_MAX_SIZE = $FFFF;
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BCM2708_BSCI2C_MIN_CLOCK = 3814;
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Default minimum based on the default settings from the firmware (Recalculated during open)
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BCM2708_BSCI2C_MAX_CLOCK = 125000000;
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Default maximum based on the default settings from the firmware (Recalculated during open)
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BCM2708_BSCI2C_DEFAULT_CLOCK = 100000;
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BCM2708_BSCI2C_MIN_DIVIDER = 2;
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Divider is always rounded down to an even number and a value of 0 sets the divider to 32768
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BCM2708_BSCI2C_MAX_DIVIDER = $FFFE;
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Divider is always rounded down to an even number
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BCM2708_BSCI2C_CORE_CLOCK = 250000000;
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Default core clock based on the default settings from the firmware (Requested from firmware during start)
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BCM2708_BSCI2C_MODE_WRITE = 0;
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BCM2708_BSCI2C_MODE_READ = 1;
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BCM2708 I2C0 (BSC0) BCM2708_I2C0_*
BCM2708_I2C0_DESCRIPTION = 'BCM2835 BSC0 Master I2C';
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BCM2708 I2C1 (BSC1) BCM2708_I2C1_*
BCM2708_I2C1_DESCRIPTION = 'BCM2835 BSC1 Master I2C';
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BCM2708 I2C2 (BSC2) BCM2708_I2C2_*
BCM2708_I2C2_DESCRIPTION = 'BCM2835 BSC2 Master I2C';
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BCM2708 SPI1 BCM2708_SPI1_*
BCM2708_SPI1_DESCRIPTION = 'BCM2835 AUX SPI1 Master';
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BCM2708 SPI2 BCM2708_SPI2_*
BCM2708_SPI2_DESCRIPTION = 'BCM2835 AUX SPI2 Master';
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BCM2708 I2C slave BCM2708_I2CSLAVE_*
BCM2708_I2CSLAVE_DESCRIPTION = 'BCM2835 I2C Slave';
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BCM2708_I2CSLAVE_TIMEOUT = 10;
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Timeout (Milliseconds) for RX/TX wait data
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BCM2708_I2CSLAVE_BUFFER_SIZE = 1024;
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Size in bytes of the RX/TX data buffer
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BCM2708_I2CSLAVE_RX_POLL_LIMIT = 256;
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Number of times interrupt handler may poll the read FIFO
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BCM2708 SPI slave BCM2708_SPISLAVE_*
BCM2708_SPISLAVE_DESCRIPTION = 'BCM2835 SPI Slave';
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BCM2708 DMA BCM2708_DMA_*
BCM2708_DMA_DESCRIPTION = 'BCM2835 DMA';
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BCM2708_DMA_CHANNEL_COUNT = 16;
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Total number of DMA channels (Not all are usable)
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BCM2708_DMA_LITE_CHANNELS = $7F80;
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Mask of DMA Lite channels (7 to 14)
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BCM2708_DMA_NORMAL_CHANNELS = $007E; {807F}
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Mask of normal channels (1 to 6)
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BCM2708_DMA_BULK_CHANNELS = $8001;
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Mask of DMA Bulk channels (0 and 15)
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BCM2708_DMA_SHARED_CHANNELS = $7800;
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Mask of channels with shared interrupt (11 to 14)
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BCM2708_DMA_MAX_LITE_TRANSFER = 65536;
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Maximum transfer length for a DMA Lite channel
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BCM2708_DMA_MAX_NORMAL_TRANSFER = 1073741824;
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Maximum transfer length for a normal channel
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BCM2708_DMA_MAX_STRIDE = $FFFF;
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Maximum stride value (Increment between rows) (Note this is a signed value (Min -32768/Max 32767)
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BCM2708_DMA_MAX_Y_COUNT = $3FFF;
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Maximum number of X length transfers in 2D stride
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BCM2708_DMA_MAX_X_LENGTH = $FFFF;
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Maximum X transfer length in 2D stride
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BCM2708_DMA_CB_ALIGNMENT = 32;
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Alignment required for DMA control blocks
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BCM2708_DMA_LITE_BURST_LENGTH = 2;
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Burst length for DMA Lite channels
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BCM2708_DMA_NORMAL_BURST_LENGTH = 4;
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Burst length for normal channels
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BCM2708_DMA_BULK_BURST_LENGTH = 16;
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Burst length for DMA Bulk channels
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BCM2708 PWM BCM2708_PWM_*
BCM2708_PWM_MIN_PERIOD = 108;
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Default based on 19.2MHz PWM clock (Oscillator source)
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BCM2708_PWM_DEFAULT_CLOCK = 19200000;
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Default to the 19.2MHz oscillator clock
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BCM2708 PWM0 BCM2708_PWM0_*
BCM2708_PWM0_DESCRIPTION = 'BCM2835 PWM0';
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BCM2708 PWM1 BCM2708_PWM1_*
BCM2708_PWM1_DESCRIPTION = 'BCM2835 PWM1';
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BCM2708 GPIO BCM2708_GPIO_*
BCM2708_GPIO_DESCRIPTION = 'BCM2835 GPIO';
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BCM2708_GPIO_MIN_PIN = GPIO_PIN_0;
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BCM2708_GPIO_MAX_PIN = GPIO_PIN_53;
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BCM2708_GPIO_MAX_LEVEL = GPIO_LEVEL_HIGH;
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BCM2708_GPIO_MAX_PULL = GPIO_PULL_DOWN;
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BCM2708_GPIO_MIN_FUNCTION = GPIO_FUNCTION_IN;
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BCM2708_GPIO_MAX_FUNCTION = GPIO_FUNCTION_ALT5;
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BCM2708_GPIO_MIN_TRIGGER = GPIO_TRIGGER_LOW;
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BCM2708_GPIO_MAX_TRIGGER = GPIO_TRIGGER_ASYNC_FALLING;
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| GPIO pull up/down to BCM2835 pull up/down
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BCM2708_GPIO_PULL_MAP:array[GPIO_PULL_NONE..GPIO_PULL_DOWN] of LongWord = (
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BCM2835_GPPUD_NONE,
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BCM2835_GPPUD_UP,
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BCM2835_GPPUD_DOWN);
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| GPIO functions to BCM2835 functions
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BCM2708_GPIO_FUNCTION_MAP:array[BCM2708_GPIO_MIN_FUNCTION..BCM2708_GPIO_MAX_FUNCTION] of LongWord = (
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BCM2835_GPFSEL_IN,
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BCM2835_GPFSEL_OUT,
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BCM2835_GPFSEL_ALT0,
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BCM2835_GPFSEL_ALT1,
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BCM2835_GPFSEL_ALT2,
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BCM2835_GPFSEL_ALT3,
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BCM2835_GPFSEL_ALT4,
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BCM2835_GPFSEL_ALT5);
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| BCM2835 functions to GPIO functions
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BCM2708_GPIO_FUNCTION_UNMAP:array[BCM2708_GPIO_MIN_FUNCTION..BCM2708_GPIO_MAX_FUNCTION] of LongWord = (
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GPIO_FUNCTION_IN,
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GPIO_FUNCTION_OUT,
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GPIO_FUNCTION_ALT5,
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GPIO_FUNCTION_ALT4,
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GPIO_FUNCTION_ALT0,
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GPIO_FUNCTION_ALT1,
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GPIO_FUNCTION_ALT2,
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GPIO_FUNCTION_ALT3);
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| GPIO triggers to BCM2835 event registers
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BCM2708_GPIO_TRIGGER_MAP:array[BCM2708_GPIO_MIN_TRIGGER..BCM2708_GPIO_MAX_TRIGGER] of LongWord = (
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GPIO_FUNCTION_IN,
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BCM2835_GPLEN0,
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BCM2835_GPHEN0,
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BCM2835_GPREN0,
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BCM2835_GPFEN0,
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BCM2835_GPAREN0,
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BCM2835_GPAFEN0);
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[Expand]
BCM2708 UART0 (PL011) BCM2708_UART0_*
BCM2708_UART0_DESCRIPTION = 'BCM2835 PL011 UART';
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BCM2708_UART0_MIN_BAUD = 300;
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Default minimum of 300 baud
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BCM2708_UART0_MAX_BAUD = 187500;
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Default maximum based on the default settings from the firmware (Recalculated during open)
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BCM2708_UART0_MIN_DATABITS = SERIAL_DATA_5BIT;
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BCM2708_UART0_MAX_DATABITS = SERIAL_DATA_8BIT;
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BCM2708_UART0_MIN_STOPBITS = SERIAL_STOP_1BIT;
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BCM2708_UART0_MAX_STOPBITS = SERIAL_STOP_2BIT;
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BCM2708_UART0_MAX_PARITY = SERIAL_PARITY_EVEN;
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BCM2708_UART0_MAX_FLOW = SERIAL_FLOW_RTS_CTS;
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BCM2708_UART0_CLOCK_RATE = 3000000;
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Default clock rate based on the default settings from the firmware (Requested from firmware during open)
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BCM2708_UART0_RX_POLL_LIMIT = 256;
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Number of times interrupt handler may poll the read FIFO
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BCM2708_UART0_RX_BUFFER_SIZE = 1024;
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BCM2708 UART1 (AUX) BCM2708_UART1_*
BCM2708_UART1_DESCRIPTION = 'BCM2835 AUX (Mini) UART';
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BCM2708 SDHCI BCM2708_EMMC_*
BCM2708_EMMC_DESCRIPTION = 'BCM2835 Arasan SD Host';
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BCM2708_EMMC_MIN_FREQ = 400000;
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Default minimum of 400KHz
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BCM2708_EMMC_MAX_FREQ = 200000000;
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Default clock rate based on the default settings from the firmware (Requested from firmware during start)
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BCM2708 SDHOST BCM2708_SDHOST_*
BCM2708_SDHOST_DESCRIPTION = 'BCM2835 SDHOST';
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BCM2708_SDHOST_MIN_FREQ = 400000;
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Default minimum of 400KHz
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BCM2708_SDHOST_MAX_FREQ = 250000000;
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Default clock rate based on the default settings from the firmware (Requested from firmware during start)
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| See: BCMSDHOST for the driver implementation
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BCM2708 clock (system timer) BCM2708_SYS_CLOCK_*
BCM2708_SYS_CLOCK_DESCRIPTION = 'BCM2835 System Timer Clock';
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BCM2708 clock (ARM timer) BCM2708_ARM_CLOCK_*
BCM2708_ARM_CLOCK_DESCRIPTION = 'BCM2835 ARM Timer Clock';
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BCM2708_ARM_CLOCK_MIN_RATE = 976562;
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Default minimum (Divider 255) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_CLOCK_MAX_RATE = 250000000;
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Default maximum (Divider 0) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_CLOCK_DEFAULT_RATE = 3968253;
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Default rate (Divider 62) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_CLOCK_MIN_DIVIDER = 0;
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BCM2708_ARM_CLOCK_MAX_DIVIDER = 255;
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BCM2708_ARM_CLOCK_DEFAULT_DIVIDER = 62;
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BCM2708_ARM_CLOCK_CORE_CLOCK = 250000000;
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Default core clock based on the default settings from the firmware (Requested from firmware during start)
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[Expand]
BCM2708 ARM timer BCM2708_ARM_TIMER_*
BCM2708_ARM_TIMER_DESCRIPTION = 'BCM2835 ARM Timer';
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BCM2708_ARM_TIMER_MIN_RATE = 244140;
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Default minimum (Divider 1023) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_TIMER_MAX_RATE = 250000000;
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Default maximum (Divider 0) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_TIMER_DEFAULT_RATE = 1000000;
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Default rate (Divider 249) based on the default settings from the firmware (Recalculated during start)
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BCM2708_ARM_TIMER_MIN_INTERVAL = 1;
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BCM2708_ARM_TIMER_MAX_INTERVAL = $FFFFFFFF;
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BCM2708_ARM_TIMER_MIN_DIVIDER = 0;
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BCM2708_ARM_TIMER_MAX_DIVIDER = 1023;
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BCM2708_ARM_TIMER_DEFAULT_DIVIDER = 249;
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BCM2708_ARM_TIMER_CORE_CLOCK = 250000000;
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Default core clock based on the default settings from the firmware (Requested from firmware during start)
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BCM2708 random BCM2708_RANDOM_*
BCM2708_RANDOM_DESCRIPTION = 'BCM2835 Random Number Generator';
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BCM2708_RANDOM_WARMUP_COUNT = $00040000;
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The initial numbers generated are "less random" so will be discarded
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BCM2708 mailbox BCM2708_MAILBOX_*
BCM2708_MAILBOX_DESCRIPTION = 'BCM2835 Mailbox';
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BCM2708 watchdog BCM2708_WATCHDOG_*
BCM2708_WATCHDOG_DESCRIPTION = 'BCM2835 Watchdog Timer';
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BCM2708 framebuffer BCM2708_FRAMEBUFFER_*
BCM2708_FRAMEBUFFER_DESCRIPTION = 'BCM2835 Framebuffer';
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Type definitions
BCM2708 SPI0
[Expand]
PBCM2708SPI0Device = ^TBCM2708SPI0Device;
TBCM2708SPI0Device = record
| SPI Properties
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SPI:TSPIDevice;
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| BCM2708 Properties
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Address:Pointer;
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Device register base address
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CoreClock:LongWord;
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Core clock rate
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| Transfer Properties
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Mode:LongWord;
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Mode of current transfer (BCM2708_SPI0_MODE_IRQ/BCM2708_SPI0_MODE_DMA / BCM2708_SPI0_MODE_PIO)
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Source:Pointer;
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Pointer to the source for current transfer (nil if reading only)
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Dest:Pointer;
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Pointer to the destination for current transfer (nil if writing only)
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Count:LongWord;
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Count of bytes for current transfer
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SourceRemain:LongWord;
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Source bytes remaining for current transfer
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DestRemain:LongWord;
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Destination bytes remaining for current transfer
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| Statistics Properties
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InterruptCount:LongWord;
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Number of interrupt requests received by the device
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BCM2708 BSCI2C (I2C0/1/2) device
[Expand]
PBCM2708BSCI2CDevice = ^TBCM2708BSCI2CDevice;
TBCM2708BSCI2CDevice = record
| I2C Properties
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I2C:TI2CDevice;
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| BCM2708 Properties
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Address:Pointer;
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Device register base address
|
CoreClock:LongWord;
|
Core clock rate
|
SDAPin:LongWord;
|
GPIO pin for the SDA line
|
SCLPin:LongWord;
|
GPIO pin for the SCL line
|
SDAFunction:LongWord;
|
GPIO function for the SDA line
|
SCLFunction:LongWord;
|
GPIO function for the SCL line
|
| Transfer Properties
|
Index:LongWord;
|
Index of this device in the IRQData array (Set during device initialization)
|
Mode:LongWord;
|
Mode of current transfer (BCM2708_BSCI2C_MODE_WRITE/BCM2708_BSCI2C_MODE_READ)
|
Data:Pointer;
|
Pointer to the data for current transfer
|
Count:LongWord;
|
Count of bytes for current transfer
|
Remain:LongWord;
|
Bytes remaining for current transfer
|
Error:LongBool;
|
True if an error occurred during the transfer
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the device
|
BCM2708 BSCI2C (I2C0/1) IRQ data
[Expand]
PBCM2708BSCI2CIRQData = ^TBCM2708BSCI2CIRQData;
TBCM2708BSCI2CIRQData = record
| Note: BSC I2C devices share a single interrupt
|
Count:LongWord;
|
|
Lock:TSpinHandle;
|
|
Devices:array[0..2] of PBCM2708BSCI2CDevice;
|
|
BCM2708 SPI AUX (SPI1/2)
[Expand]
PBCM2708SPIAUXDevice = ^TBCM2708SPIAUXDevice;
TBCM2708SPIAUXDevice = record
| SPI Properties
|
SPI:TSPIDevice;
|
|
| BCM2708 Properties
|
Address:Pointer;
|
Device register base address
|
CoreClock:LongWord;
|
Core clock rate
|
BCM2708 I2C slave buffer
[Expand]
PBCM2708I2CSlaveBuffer = ^TBCM2708I2CSlaveBuffer;
TBCM2708I2CSlaveBuffer = record
Wait:TSemaphoreHandle;
|
Data ready semaphore
|
Start:LongWord;
|
Index of first available buffer entry
|
Count:LongWord;
|
Number of available entries in the buffer
|
Buffer:array[0..(BCM2708_I2CSLAVE_BUFFER_SIZE - 1)] of Byte;
|
|
BCM2708 I2C slave
[Expand]
PBCM2708I2CSlave = ^TBCM2708I2CSlave;
TBCM2708I2CSlave = record
| I2C Properties
|
I2C:TI2CDevice;
|
|
| BCM2708 Properties
|
IRQ:LongWord;
|
IRQ of this device
|
Address:Pointer;
|
Device register base address
|
Lock:TSpinHandle;
|
Device lock (Differs from lock in I2C device) (Spin lock due to use by interrupt handler)
|
SDAPin:LongWord;
|
GPIO pin for the SDA line
|
SCLPin:LongWord;
|
GPIO pin for the SCL line
|
SDAFunction:LongWord;
|
GPIO function for the SDA line
|
SCLFunction:LongWord;
|
GPIO function for the SCL line
|
| Transfer Properties
|
Receive:TBCM2708I2CSlaveBuffer;
|
Receive Data Buffer
|
Transmit:TBCM2708I2CSlaveBuffer;
|
Transmit Data Buffer
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the device
|
BCM2708 DMA channel
[Expand]
PBCM2708DMAChannel = ^TBCM2708DMAChannel;
TBCM2708DMAChannel = record
Host:PBCM2708DMAHost;
|
DMA host this channel belongs to
|
Request:PDMARequest;
|
Current DMA request pending on this channel (or nil of no request is pending)
|
Number:LongWord;
|
The channel number of this channel
|
Interrupt:LongWord;
|
The interrupt number of this channel
|
Registers:PBCM2835DMARegisters;
|
The channel registers for configuration
|
BCM2708 DMA
[Expand]
PBCM2708DMAHost = ^TBCM2708DMAHost;
TBCM2708DMAHost = record
| DMA Properties
|
DMA:TDMAHost;
|
|
| BCM2708 Properties
|
ChannelMask:LongWord;
|
Mask of available channels (Passed from GPU firmware)
|
ChannelFree:LongWord;
|
Bitmap of current free channels
|
ChannelLock:TMutexHandle;
|
Lock for access to ChannelFree
|
ChannelWait:TSemaphoreHandle;
|
Number of free normal channels in ChannelFree
|
ChannelLite:TSemaphoreHandle;
|
Number of free DMA Lite channels in ChannelFree
|
ChannelBulk:TSemaphoreHandle;
|
Number of free DMA Bulk channels in ChannelFree
|
Channels:array[0..BCM2708_DMA_CHANNEL_COUNT - 1] of TBCM2708DMAChannel;
|
Channel information for each DMA channel on the host
|
EnableRegister:PLongWord;
|
|
InterruptRegister:PLongWord;
|
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the host controller
|
BCM2708 PWM device
[Expand]
PBCM2708PWMDevice = ^TBCM2708PWMDevice;
TBCM2708PWMDevice = record
| PWM Properties
|
PWM:TPWMDevice;
|
|
| BCM2708 Properties
|
Address:Pointer;
|
Device register base address
|
Channel:LongWord;
|
Channel for this device
|
Scaler:LongWord;
|
Scaler for Duty cycle and Period
|
Pair:PBCM2708PWMDevice;
|
The paired PWM device for the other channel
|
| Audio Properties
|
Audio:PBCM2708PWMAudio;
|
The associated PWM Audio device
|
BCM2708 PWM audio
[Expand]
PBCM2708PWMAudio = ^TBCM2708PWMAudio;
TBCM2708PWMAudio = record
| Audio Properties
|
Audio:TAudioDevice;
|
|
| PWM Properties
|
PWM0:PBCM2708PWMDevice;
|
The PWM device for channel 0
|
PWM1:PBCM2708PWMDevice;
|
The PWM device for channel 1
|
BCM2708 GPIO
[Expand]
PBCM2708GPIOBank = ^TBCM2708GPIOBank;
TBCM2708GPIOBank = record
GPIO:PGPIODevice;
|
|
Bank:LongWord;
|
|
Address:PtrUInt;
|
|
PinStart:LongWord;
|
|
BCM2708 GPIO device
[Expand]
PBCM2708GPIODevice = ^TBCM2708GPIODevice;
TBCM2708GPIODevice = record
| GPIO Properties
|
GPIO:TGPIODevice;
|
|
| BCM2708 Properties
|
Lock:TSpinHandle;
|
Device lock (Differs from lock in Device portion) (Spin lock due to use by interrupt handler)
|
Banks:array[0..BCM2835_GPIO_BANK_COUNT - 1] of TBCM2708GPIOBank;
|
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the device
|
BCM2708 UART0
[Expand]
PBCM2708UART0Device = ^TBCM2708UART0Device;
TBCM2708UART0Device = record
| UART Properties
|
UART:TUARTDevice;
|
|
| BCM2708 Properties
|
Address:Pointer;
|
Device register base address
|
ClockRate:LongWord;
|
Device clock rate
|
|
|
Start:LongWord;
|
Index of first available buffer entry
|
Count:LongWord;
|
Number of available entries in the buffer
|
Buffer:array[0..(BCM2708_UART0_RX_BUFFER_SIZE - 1)] of Word;
|
Buffer for received data (Includes data and status)
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the device
|
BCM2708 SDHCI
[Expand]
PBCM2708SDHCIHost = ^TBCM2708SDHCIHost;
TBCM2708SDHCIHost = record
| SDHCI Properties
|
SDHCI:TSDHCIHost;
|
|
| BCM2708 Properties
|
FIQ:LongBool;
|
|
SDIO:LongBool;
|
|
WriteDelay:LongWord;
|
|
DelayClock:LongWord;
|
|
ShadowRegister:LongWord;
|
|
BCM2708 system clock
[Expand]
PBCM2708SystemClock = ^TBCM2708SystemClock;
TBCM2708SystemClock = record
| Clock Properties
|
Clock:TClockDevice;
|
|
BCM2708 ARM clock
[Expand]
PBCM2708ARMClock = ^TBCM2708ARMClock;
TBCM2708ARMClock = record
| Clock Properties
|
Clock:TClockDevice;
|
|
| BCM2708 Properties
|
CoreClock:LongWord;
|
Core clock rate
|
BCM2708 ARM timer
[Expand]
PBCM2708ARMTimer = ^TBCM2708ARMTimer;
TBCM2708ARMTimer = record
| Timer Properties
|
Timer:TTimerDevice;
|
|
| BCM2708 Properties
|
CoreClock:LongWord;
|
Core clock rate
|
| Statistics Properties
|
InterruptCount:LongWord;
|
Number of interrupt requests received by the device
|
BCM2708 random
[Expand]
PBCM2708Random = ^TBCM2708Random;
TBCM2708Random = record
| Random Properties
|
Random:TRandomDevice;
|
|
BCM2708 mailbox
[Expand]
PBCM2708Mailbox = ^TBCM2708Mailbox;
TBCM2708Mailbox = record
| Mailbox Properties
|
Mailbox:TMailboxDevice;
|
|
BCM2708 watchdog
[Expand]
PBCM2708Watchdog = ^TBCM2708Watchdog;
TBCM2708Watchdog = record
| Watchdog Properties
|
Watchdog:TWatchdogDevice;
|
|
BCM2708 framebuffer
[Expand]
PBCM2708Framebuffer = ^TBCM2708Framebuffer;
TBCM2708Framebuffer = record
| Framebuffer Properties
|
Framebuffer:TFramebufferDevice;
|
|
| BCM2708 Properties
|
MultiDisplay:LongBool;
|
|
DisplayNum:LongWord;
|
|
DisplaySettings:TDisplaySettings;
|
|
Public variables
None defined
Function declarations
Initialization functions
[Expand]
procedure BCM2708Init;
Description: To be documented
BCM2708 SPI0 functions
[Expand]
function BCM2708SPI0Start(SPI:PSPIDevice; Mode,ClockRate,ClockPhase,ClockPolarity:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0Stop(SPI:PSPIDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0WriteRead(SPI:PSPIDevice; ChipSelect:Word; Source,Dest:Pointer; Size,Flags: LongWord; var Count:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0SetMode(SPI:PSPIDevice; Mode:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0SetClockRate(SPI:PSPIDevice; ChipSelect:Word; ClockRate:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0SetClockPhase(SPI:PSPIDevice; ClockPhase:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0SetClockPolarity(SPI:PSPIDevice; ClockPolarity:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708SPI0SetSelectPolarity(SPI:PSPIDevice; ChipSelect:Word; SelectPolarity:LongWord):LongWord;
Description: To be documented
[Expand]
procedure BCM2708SPI0ReadFIFO(SPI:PBCM2708SPI0Device);
Description: Caller will hold the SPI device lock
| Note
|
Called from within the interrupt handler
|
[Expand]
procedure BCM2708SPI0WriteFIFO(SPI:PBCM2708SPI0Device);
Description: Caller will hold the SPI device lock
| Note
|
Called from within the interrupt handler
|
[Expand]
procedure BCM2708SPI0InterruptHandler(SPI:PBCM2708SPI0Device);
Description: To be documented
[Expand]
procedure BCM2708SPI0DMARequestCompleted(Request:PDMARequest);
Description: DMA Request completion callback for SPI0
BCM2708 BSCI2C (I2C0/1/2) functions
[Expand]
function BCM2708BSCI2CStart(I2C:PI2CDevice; Rate:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CStop(I2C:PI2CDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CRead(I2C:PI2CDevice; Address:Word; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CWrite(I2C:PI2CDevice; Address:Word; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CWriteRead(I2C:PI2CDevice; Address:Word; Initial:Pointer; Len:LongWord; Data:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CWriteWrite(I2C:PI2CDevice; Address:Word; Initial:Pointer; Len:LongWord; Data:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CSetRate(I2C:PI2CDevice; Rate:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708BSCI2CSetAddress(I2C:PI2CDevice; Address:Word):LongWord;
Description: To be documented
[Expand]
procedure BCM2708BSCI2CFillFIFO(I2C:PBCM2708BSCI2CDevice);
Description: Caller will hold the I2C device lock
| Note
|
Called from within the interrupt handler
|
[Expand]
procedure BCM2708BSCI2CDrainFIFO(I2C:PBCM2708BSCI2CDevice);
Description: Caller will hold the I2C device lock
| Note
|
Called from within the interrupt handler
|
[Expand]
procedure BCM2708BSCI2CInterruptHandler(IRQData:PBCM2708BSCI2CIRQData);
Description: To be documented
| Note
|
Thread submitting the current request will hold the I2C device lock
|
BCM2708 SPI/I2C slave functions
[Expand]
function BCM2708I2CSlaveStart(I2C:PI2CDevice; Rate:LongWord):LongWord;
Description: Implementation of I2CSlaveStart API for BCM2708 I2C slave
| Note
|
Not intended to be called directly by applications, use I2CSlaveStart instead.
Rate is not applicable for I2C slave devices
|
[Expand]
function BCM2708I2CSlaveStop(I2C:PI2CDevice):LongWord;
Description: Implementation of I2CSlaveStop API for BCM2708 I2C slave
| Note
|
Not intended to be called directly by applications, use I2CSlaveStop instead.
|
[Expand]
function BCM2708I2CSlaveRead(I2C:PI2CDevice; Address:Word; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: Implementation of I2CSlaveRead API for BCM2708 I2C slave
| Note
|
Not intended to be called directly by applications, use I2CSlaveRead instead.
Address is not applicable for I2C slave devices
|
[Expand]
function BCM2708I2CSlaveWrite(I2C:PI2CDevice; Address:Word; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: Implementation of I2CSlaveWrite API for BCM2708 I2C slave
| Note
|
Not intended to be called directly by applications, use I2CSlaveWrite instead.
Address is not applicable for I2C slave devices
|
[Expand]
function BCM2708I2CSlaveSetAddress(I2C:PI2CDevice; Address:Word):LongWord;
Description: Implementation of I2CSlaveSetAddress API for BCM2708 I2C slave
| Note
|
Not intended to be called directly by applications, use I2CSlaveSetAddress instead.
|
BCM2708 DMA functions
[Expand]
function BCM2708DMAHostStart(DMA:PDMAHost):LongWord;
Description: To be documented
[Expand]
function BCM2708DMAHostStop(DMA:PDMAHost):LongWord;
Description: To be documented
[Expand]
function BCM2708DMAHostSubmit(DMA:PDMAHost; Request:PDMARequest):LongWord;
Description: To be documented
[Expand]
function BCM2708DMAHostCancel(DMA:PDMAHost; Request:PDMARequest):LongWord;
Description: To be documented
[Expand]
procedure BCM2708DMAInterruptHandler(Channel:PBCM2708DMAChannel);
Description: DMA Channels 0 to 10 each have a dedicated interrupt, this handler simply clears the interrupt and sends a completion on the associated channel
[Expand]
procedure BCM2708DMASharedInterruptHandler(DMA:PBCM2708DMAHost);
Description: DMA Channels 11 to 14 share a common interrupt, this alternate handler determines which ones triggered the current interrupt and sends a completion on that channel
[Expand]
procedure BCM2708DMARequestComplete(Channel:PBCM2708DMAChannel);
Description: To be documented
[Expand]
function BCM2708DMAPeripheralToDREQ(Peripheral:LongWord):LongWord;
Description: To be documented
[Expand]
procedure BCM2708DMADataToControlBlock(Request:PDMARequest; Data:PDMAData; Block:PBCM2835DMAControlBlock; Bulk,Lite:Boolean);
Description: To be documented
BCM2708 PWM0/1 functions
[Expand]
function BCM2708PWMStart(PWM:PPWMDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMStop(PWM:PPWMDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMWrite(PWM:PPWMDevice; Value:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMSetGPIO(PWM:PPWMDevice; GPIO:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMResetGPIO(PWM:PPWMDevice; GPIO:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMSetMode(PWM:PPWMDevice; Mode:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMSetRange(PWM:PPWMDevice; Range:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMSetFrequency(PWM:PPWMDevice; Frequency:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMSetPolarity(PWM:PPWMDevice; Polarity:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMConfigure(PWM:PPWMDevice; DutyNS,PeriodNS:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMClockStart(PWM:PPWMDevice; Frequency:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMClockStop(PWM:PPWMDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708PWMClockEnabled(PWM:PPWMDevice):Boolean;
Description: To be documented
BCM2708 GPIO functions
[Expand]
function BCM2708GPIOStart(GPIO:PGPIODevice):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOStop(GPIO:PGPIODevice):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIORead(GPIO:PGPIODevice;Reg:LongWord):LongWord;
Description: To be documented
[Expand]
procedure BCM2708GPIOWrite(GPIO:PGPIODevice; Reg,Value:LongWord);
Description: To be documented
[Expand]
function BCM2708GPIOInputGet(GPIO:PGPIODevice; Pin:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOInputWait(GPIO:PGPIODevice; Pin,Trigger,Timeout:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOInputEvent(GPIO:PGPIODevice; Pin,Trigger,Flags,Timeout:LongWord; Callback:TGPIOCallback; Data:Pointer):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOInputCancel(GPIO:PGPIODevice; Pin:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOOutputSet(GPIO:PGPIODevice; Pin,Level:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOPullSelect(GPIO:PGPIODevice; Pin,Mode:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOFunctionGet(GPIO:PGPIODevice; Pin:LongWord):LongWord;
Description: To be documented
[Expand]
function BCM2708GPIOFunctionSelect(GPIO:PGPIODevice; Pin,Mode:LongWord):LongWord;
Description: To be documented
[Expand]
procedure BCM2708GPIOInterruptHandler(Bank:PBCM2708GPIOBank);
Description: To be documented
[Expand]
procedure BCM2708GPIOEventTrigger(Pin:PGPIOPin);
Description: To be documented
[Expand]
procedure BCM2708GPIOEventTimeout(Event:PGPIOEvent);
Description: To be documented
BCM2708 UART0 functions
[Expand]
function BCM2708UART0Open(UART:PUARTDevice; BaudRate,DataBits,StopBits,Parity,FlowControl:LongWord):LongWord;
Description: Implementation of UARTDeviceOpen API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceOpen instead.
|
[Expand]
function BCM2708UART0Close(UART:PUARTDevice):LongWord;
Description: Implementation of UARTDeviceClose API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceClose instead.
|
[Expand]
function BCM2708UART0Read(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Implementation of UARTDeviceRead API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceRead instead.
|
[Expand]
function BCM2708UART0PushRX(UART:PUARTDevice):LongWord;
Description: To be documented
[Expand]
function BCM2708UART0Write(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Implementation of UARTDeviceWrite API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceWrite instead.
|
[Expand]
function BCM2708UART0GetStatus(UART:PUARTDevice):LongWord;
Description: Implementation of UARTDeviceGetStatus API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceGetStatus instead.
|
[Expand]
function BCM2708UART0SetStatus(UART:PUARTDevice; Status:LongWord):LongWord;
Description: Implementation of UARTDeviceSetStatus API for BCM2708 UART0
| Note
|
Not intended to be called directly by applications, use UARTDeviceSetStatus instead.
|
[Expand]
procedure BCM2708UART0InterruptHandler(UART:PUARTDevice);
Description: Interrupt handler for the BCM2708 UART0 device
| Note
|
Not intended to be called directly by applications
|
[Expand]
procedure BCM2708UART0Receive(UART:PUARTDevice);
Description: Receive handler for the BCM2708 UART0 device
| Note
|
Not intended to be called directly by applications
|
[Expand]
procedure BCM2708UART0Transmit(UART:PUARTDevice);
Description: Transmit handler for the BCM2708 UART0 device
| Note
|
Not intended to be called directly by applications
|
[Expand]
procedure BCM2708UART0EnableInterrupt(UART:PBCM2708UART0Device; Interrupt:LongWord);
Description: Enable the specified interrupt in the interrupt mask register of a BCM2708 UART0 device
| UART
|
The BCM2708 UART0 device to enable the interrupt for
|
| Interrupt
|
The interrupt to enable
|
| Note
|
Caller must hold the UART lock
|
[Expand]
procedure BCM2708UART0DisableInterrupt(UART:PBCM2708UART0Device; Interrupt:LongWord);
Description: Disable the specified interrupt in the interrupt mask register of a BCM2708 UART0 device
| UART
|
The BCM2708 UART0 device to disable the interrupt for
|
| Interrupt
|
The interrupt to disable
|
| Note
|
Caller must hold the UART lock
|
BCM2708 SDHCI functions
[Expand]
function BCM2708SDHCIHostStart(SDHCI:PSDHCIHost):LongWord;
Description: Implementation of SDHCIHostStart API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostStart instead.
|
[Expand]
function BCM2708SDHCIHostStop(SDHCI:PSDHCIHost):LongWord;
Description: Implementation of SDHCIHostStop API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostStop instead.
|
[Expand]
function BCM2708SDHCIHostLock(SDHCI:PSDHCIHost):LongWord;
Description: Implementation of SDHCIHostLock API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostLock instead.
|
[Expand]
function BCM2708SDHCIHostUnlock(SDHCI:PSDHCIHost):LongWord;
Description: Implementation of SDHCIHostUnlock API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostUnlock instead.
|
[Expand]
function BCM2708SDHCIHostSignal(SDHCI:PSDHCIHost; Semaphore:TSemaphoreHandle):LongWord;
Description: Implementation of SDHCIHostSignal API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostSignal instead.
|
[Expand]
function BCM2708SDHCIHostReadByte(SDHCI:PSDHCIHost; Reg:LongWord):Byte;
Description: Implementation of SDHCIHostReadByte API for BCM2708 SDHCI
| Note
|
Not intended to be called directly by applications, use SDHCIHostReadByte instead.
|
| Note
|
The Broadcom document BCM2835-ARM-Peripherals page 66 states the following: Contrary to Arasans documentation the EMMC module registers can only be accessed as 32 bit registers, i.e. the two LSBs of the address are always zero. For this reason this code must simulate Byte and Word reads using LongWord reads.
|
[Expand]
function BCM2708SDHCIHostReadWord(SDHCI:PSDHCIHost; Reg:LongWord):Word;
Description: Implementation of SDHCIHostReadWord API for BCM2708 SDHCI
| Note
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Not intended to be called directly by applications, use SDHCIHostReadWord instead.
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| Note
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The Broadcom document BCM2835-ARM-Peripherals page 66 states the following: Contrary to Arasans documentation the EMMC module registers can only be accessed as 32 bit registers, i.e. the two LSBs of the address are always zero. For this reason this code must simulate Byte and Word reads using LongWord reads.
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function BCM2708SDHCIHostReadLong(SDHCI:PSDHCIHost; Reg:LongWord):LongWord;
Description: Implementation of SDHCIHostReadLong API for BCM2708 SDHCI
| Note
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Not intended to be called directly by applications, use SDHCIHostReadLong instead.
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procedure BCM2708SDHCIHostWriteByte(SDHCI:PSDHCIHost; Reg:LongWord; Value:Byte);
Description: Implementation of SDHCIHostWriteByte API for BCM2708 SDHCI
| Note
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Not intended to be called directly by applications, use SDHCIHostWriteByte instead.
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| Note
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The Broadcom document BCM2835-ARM-Peripherals page 66 states the following: Contrary to Arasans documentation the EMMC module registers can only be accessed as 32 bit registers, i.e. the two LSBs of the address are always zero. For this reason this code must simulate Byte and Word writes using LongWord writes.
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procedure BCM2708SDHCIHostWriteWord(SDHCI:PSDHCIHost; Reg:LongWord; Value:Word);
Description: Implementation of SDHCIHostWriteWord API for BCM2708 SDHCI
| Note
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Not intended to be called directly by applications, use SDHCIHostWriteWord instead.
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| Note
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The Broadcom document BCM2835-ARM-Peripherals page 66 states the following: Contrary to Arasans documentation the EMMC module registers can only be accessed as 32 bit registers, i.e. the two LSBs of the address are always zero. For this reason this code must simulate Byte and Word writes using LongWord writes.
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[Expand]
procedure BCM2708SDHCIHostWriteLong(SDHCI:PSDHCIHost; Reg:LongWord; Value:LongWord);
Description: Implementation of SDHCIHostWriteLong API for BCM2708 SDHCI
| Note
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Not intended to be called directly by applications, use SDHCIHostWriteLong instead.
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| Note
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The source code of U-Boot and Linux kernel drivers have this comment The Arasan has a bugette whereby it may lose the content of successive writes to registers that are within two SD-card clock cycles of each other (a clock domain crossing problem). It seems, however, that the data register does not have this problem. (Which is just as well - otherwise we'd have to nobble the DMA engine too) For this reason this code must delay after each write to the registers.
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procedure BCM2708SDHCIInterruptHandler(SDHCI:PSDHCIHost);
Description: Interrupt handler for the BCM2708 SDHCI host controller
| Note
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Not intended to be called directly by applications
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function BCM2708SDHCISetupInterrupts(SDHCI:PSDHCIHost):LongWord;
Description: Configure and enable interrupt handling for the BCM2708 SDHCI
| Note
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Not intended to be called directly by applications
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function BCM2708MMCDeviceGetCardDetect(MMC:PMMCDevice):LongWord;
Description: Implementation of MMC GetCardDetect for the BCM2708 which does not update the bits in the SDHCI_PRESENT_STATE register to reflect card insertion or removal
| Note
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Not intended to be called directly by applications, use MMCDeviceGetCardDetect instead.
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BCM2708 system clock functions
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function BCM2708SystemClockRead(Clock:PClockDevice):LongWord;
Description: Implementation of ClockDeviceRead API for System Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceRead instead.
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function BCM2708SystemClockRead64(Clock:PClockDevice):Int64;
Description: Implementation of ClockDeviceRead64 API for System Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceRead64 instead.
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BCM2708 ARM clock functions
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function BCM2708ARMClockStart(Clock:PClockDevice):LongWord;
Description: Implementation of ClockDeviceStart API for ARM Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceStart instead.
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function BCM2708ARMClockStop(Clock:PClockDevice):LongWord;
Description: Implementation of ClockDeviceStop API for ARM Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceStop instead.
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function BCM2708ARMClockRead(Clock:PClockDevice):LongWord;
Description: Implementation of ClockDeviceRead API for ARM Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceRead instead.
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function BCM2708ARMClockRead64(Clock:PClockDevice):Int64;
Description: Implementation of ClockDeviceRead64 API for ARM Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceRead64 instead.
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function BCM2708ARMClockSetRate(Clock:PClockDevice; Rate:LongWord):LongWord;
Description: Implementation of ClockDeviceSetRate API for ARM Clock
| Note
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Not intended to be called directly by applications, use ClockDeviceSetRate instead.
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BCM2708 ARM timer functions
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function BCM2708ARMTimerStart(Timer:PTimerDevice):LongWord;
Description: Implementation of TimerDeviceStart API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceStart instead.
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function BCM2708ARMTimerStop(Timer:PTimerDevice):LongWord;
Description: Implementation of TimerDeviceStop API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceStop instead.
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[Expand]
function BCM2708ARMTimerRead64(Timer:PTimerDevice):Int64;
Description: Implementation of TimerDeviceRead64 API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceRead64 instead.
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function BCM2708ARMTimerWait(Timer:PTimerDevice):LongWord;
Description: Implementation of TimerDeviceWait API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceWait instead.
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function BCM2708ARMTimerEvent(Timer:PTimerDevice; Flags:LongWord; Callback:TTimerCallback; Data:Pointer):LongWord;
Description: Implementation of TimerDeviceEvent API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceEvent instead.
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function BCM2708ARMTimerCancel(Timer:PTimerDevice):LongWord;
Description: Implementation of TimerDeviceCancel API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceCancel instead.
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function BCM2708ARMTimerSetRate(Timer:PTimerDevice; Rate:LongWord):LongWord;
Description: Implementation of TimerDeviceSetRate API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceSetRate instead.
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function BCM2708ARMTimerSetInterval(Timer:PTimerDevice; Interval:LongWord):LongWord;
Description: Implementation of TimerDeviceSetInterval API for ARM Timer
| Note
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Not intended to be called directly by applications, use TimerDeviceSetInterval instead.
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procedure BCM2708ARMTimerInterruptHandler(Timer:PTimerDevice);
Description: Interrupt handler for ARM Timer
| Note
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Not intended to be called directly by applications
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procedure BCM2708ARMTimerEventTrigger(Timer:PTimerDevice);
Description: Event handler for ARM Timer
| Note
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Not intended to be called directly by applications
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BCM2708 random functions
[Expand]
function BCM2708RandomStart(Random:PRandomDevice):LongWord;
Description: To be documented
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function BCM2708RandomStop(Random:PRandomDevice):LongWord;
Description: To be documented
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function BCM2708RandomReadLongWord(Random:PRandomDevice):LongWord;
Description: To be documented
BCM2708 watchdog functions
[Expand]
function BCM2708WatchdogStart(Watchdog:PWatchdogDevice):LongWord;
Description: To be documented
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function BCM2708WatchdogStop(Watchdog:PWatchdogDevice):LongWord;
Description: To be documented
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function BCM2708WatchdogRefresh(Watchdog:PWatchdogDevice):LongWord;
Description: To be documented
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function BCM2708WatchdogGetRemain(Watchdog:PWatchdogDevice):LongWord;
Description: To be documented
BCM2708 framebuffer functions
[Expand]
function BCM2708FramebufferAllocate(Framebuffer:PFramebufferDevice; Properties:PFramebufferProperties):LongWord;
Description: Implementation of FramebufferDeviceAllocate API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceAllocate instead.
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function BCM2708FramebufferRelease(Framebuffer:PFramebufferDevice):LongWord;
Description: Implementation of FramebufferDeviceRelease API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceRelease instead.
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function BCM2708FramebufferBlank(Framebuffer:PFramebufferDevice; Blank:Boolean):LongWord;
Description: Implementation of FramebufferDeviceBlank API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceBlank instead.
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function BCM2708FramebufferCommit(Framebuffer:PFramebufferDevice;Address:PtrUInt;Size,Flags:LongWord):LongWord;
Description: Implementation of FramebufferDeviceCommit API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceCommit instead.
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function BCM2708FramebufferWaitSync(Framebuffer:PFramebufferDevice):LongWord;
Description: Implementation of FramebufferDeviceWaitSync API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceWaitSync instead.
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function BCM2708FramebufferSetOffsetEx(Framebuffer:PFramebufferDevice; X,Y:LongWord; Pan,Switch:Boolean):LongWord;
Description: Implementation of FramebufferDeviceSetOffsetEx API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceSetOffsetEx instead.
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function BCM2708FramebufferGetPalette(Framebuffer:PFramebufferDevice; Palette:PFramebufferPalette):LongWord;
Description: Implementation of FramebufferDeviceGetPalette API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceGetPalette instead.
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function BCM2708FramebufferSetPalette(Framebuffer:PFramebufferDevice; Palette:PFramebufferPalette):LongWord;
Description: Implementation of FramebufferDeviceSetPalette API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceSetPalette instead.
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[Expand]
function BCM2708FramebufferSetBacklight(Framebuffer:PFramebufferDevice; Brightness:LongWord):LongWord;
Description: Implementation of FramebufferDeviceSetBacklight API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceSetBacklight instead.
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[Expand]
function BCM2708FramebufferSetCursor(Framebuffer:PFramebufferDevice; Width,Height,HotspotX,HotspotY:LongWord; Image:Pointer; Len:LongWord):LongWord;
Description: Implementation of FramebufferDeviceSetCursor API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceSetCursor instead.
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[Expand]
function BCM2708FramebufferUpdateCursor(Framebuffer:PFramebufferDevice; Enabled:Boolean; X,Y:LongInt; Relative:Boolean):LongWord;
Description: Implementation of FramebufferDeviceUpdateCursor API for BCM2708 Framebuffer
| Note
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Not intended to be called directly by applications, use FramebufferDeviceUpdateCursor instead.
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BCM2708 helper functions
[Expand]
function BCM2708SPIGetDescription(Id:LongWord):String;
Description: Get the device description of an SPI device
| Id
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The Id number of the SPI device (0 to 2)
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| Return
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The correct device description suitable for passing to SPIDeviceFindByDescription
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| Note
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The Id number supplied to this function may differ from the Ultibo device id value.
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function BCM2708I2CGetDescription(Id:LongWord):String;
Description: Get the device description of an I2C device
| Id
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The Id number of the I2C device (0 to 2)
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| Return
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The correct device description suitable for passing to I2CDeviceFindByDescription
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| Note
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The Id number supplied to this function may differ from the Ultibo device id value.
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[Expand]
function BCM2708I2CSlaveGetDescription(Id:LongWord):String;
Description: Get the device description of an I2C slave device
| Id
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The Id number of the I2C slave device (Always 0)
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| Return
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The correct device description suitable for passing to I2CSlaveFindByDescription
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| Note
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The Id number supplied to this function may differ from the Ultibo device id value
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[Expand]
function BCM2708PWMGetDescription(Id,Channel:LongWord):String;
Description: Get the device description of a PWM device
| Id
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The Id number of the PWM device (0 or 1)
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| Channel
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The channel number of the PWM device (0 or 1)
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| Return
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The correct device description suitable for passing to PWMDeviceFindByDescription
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| Note
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The Id number supplied to this function may differ from the Ultibo device id value.
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[Expand]
function BCM2708UARTGetDescription(Id:LongWord):String;
Description: Get the device description of a UART device
| Id
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The Id number of the UART device (0 or 1)
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| Return
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The correct device description suitable for passing to UARTDeviceFindByDescription
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| Note
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The Id number supplied to this function may differ from the Ultibo device id value.
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