Difference between revisions of "Unit UART"

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Line 5: Line 5:
 
----
 
----
  
−
'''Ultibo UART interface unit'''
+
'''Ultibo UART Interface unit'''
  
 
UART (Universal Asynchronous Receiver Transmitter) devices represent the industry standard serial communications devices that are available on almost every system.
 
UART (Universal Asynchronous Receiver Transmitter) devices represent the industry standard serial communications devices that are available on almost every system.
Line 51: Line 51:
 
| <code>UART_TYPE_16650 = 3;</code>
 
| <code>UART_TYPE_16650 = 3;</code>
 
| 16650 UART and similar variants (eg 16C650) (Differences are handled by driver)
 
| 16650 UART and similar variants (eg 16C650) (Differences are handled by driver)
 +
|-
 +
|colspan="2"|&nbsp;
 +
|-
 +
| <code>UART_TYPE_MAX = 3;</code>
 +
| &nbsp;
 
|-
 
|-
 
|}
 
|}
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| <code>UART_MODE_SERIAL = 2;</code>
 
| <code>UART_MODE_SERIAL = 2;</code>
 
| The UART was opened as a Serial device so reads and writes are being buffered
 
| The UART was opened as a Serial device so reads and writes are being buffered
 +
|-
 +
|colspan="2"|&nbsp;
 +
|-
 +
| <code>UART_MODE_MAX = 2;</code>
 +
| &nbsp;
 
|-
 
|-
 
|}
 
|}
Line 81: Line 91:
 
|-
 
|-
 
| <code>UART_STATE_ENABLED = 1;</code>
 
| <code>UART_STATE_ENABLED = 1;</code>
 +
| &nbsp;
 +
|-
 +
|colspan="2"|&nbsp;
 +
|-
 +
| <code>UART_STATE_MAX = 1;</code>
 
| &nbsp;
 
| &nbsp;
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| Called only during system startup
 
| Called only during system startup
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to open
 
| The UART device to open
 
|-
 
|-
−
! '''BaudRate'''
+
! BaudRate
−
| Baud rate for the connection (eg 9600, 57600, 115200 etc
+
| Baud rate for the connection (eg 9600, 57600, 115200 etc)
 
|-
 
|-
−
! '''DataBits'''
+
! DataBits
 
| Size of the data (eg SERIAL_DATA_8BIT)
 
| Size of the data (eg SERIAL_DATA_8BIT)
 
|-
 
|-
−
! '''StopBits'''
+
! StopBits
 
| Number of stop bits (eg SERIAL_STOP_1BIT)
 
| Number of stop bits (eg SERIAL_STOP_1BIT)
 
|-
 
|-
−
! '''Parity'''
+
! Parity
 
| Parity type for the data (eg SERIAL_PARITY_NONE)
 
| Parity type for the data (eg SERIAL_PARITY_NONE)
 
|-
 
|-
−
! '''FlowControl'''
+
! FlowControl
 
| Flow control for the connection (eg SERIAL_FLOW_NONE)
 
| Flow control for the connection (eg SERIAL_FLOW_NONE)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
Line 583: Line 598:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to close
 
| The UART device to close
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to read from
 
| The UART device to read from
 
|-
 
|-
−
! '''Buffer'''
+
! Buffer
 
| Pointer to a buffer to receive the data
 
| Pointer to a buffer to receive the data
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| The size of the buffer
 
| The size of the buffer
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| The flags to control reading (eg UART_READ_NON_BLOCK)
 
| The flags to control reading (eg UART_READ_NON_BLOCK)
 
|-
 
|-
−
! '''Count'''
+
! Count
 
| The number of bytes read on return
 
| The number of bytes read on return
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to write to
 
| The UART device to write to
 
|-
 
|-
−
! '''Buffer'''
+
! Buffer
 
| Pointer to a buffer of data to transmit
 
| Pointer to a buffer of data to transmit
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| The size of the buffer
 
| The size of the buffer
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| The flags to control writing (eg UART_WRITE_NON_BLOCK)
 
| The flags to control writing (eg UART_WRITE_NON_BLOCK)
 
|-
 
|-
−
! '''Count'''
+
! Count
 
| The number of bytes written on return
 
| The number of bytes written on return
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to wait for
 
| The UART device to wait for
 
|-
 
|-
−
! '''Direction'''
+
! Direction
 
| The direction of data to wait for (eg UART_WAIT_RECEIVE)
 
| The direction of data to wait for (eg UART_WAIT_RECEIVE)
 
|-
 
|-
−
! '''Timeout'''
+
! Timeout
 
| The number of milliseconds to wait for data (INFINITE to wait forever)
 
| The number of milliseconds to wait for data (INFINITE to wait forever)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to get the status from
 
| The UART device to get the status from
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| A set of flags containing the device status (eg UART_STATUS_RTS)
 
| A set of flags containing the device status (eg UART_STATUS_RTS)
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| Replaced by UARTDeviceGetStatus for consistency
 
| Replaced by UARTDeviceGetStatus for consistency
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to get the status from
 
| The UART device to get the status from
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| A set of flags containing the device status (eg UART_STATUS_RTS)
 
| A set of flags containing the device status (eg UART_STATUS_RTS)
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to set the status for
 
| The UART device to set the status for
 
|-
 
|-
−
! '''Status'''
+
! Status
 
| The device status flags to be set (eg UART_STATUS_RTS)
 
| The device status flags to be set (eg UART_STATUS_RTS)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not all UART_STATUS_* flags can be set, the device may ignore invalid values
+
| Not all UART_STATUS_* flags can be set, the device may ignore invalid values.
−
Not all UART devices support set status, returns ERROR_CALL_NOT_IMPLEMENTED if not supported
+
Not all UART devices support set status, returns ERROR_CALL_NOT_IMPLEMENTED if not supported.
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to get properties from
 
| The UART device to get properties from
 
|-
 
|-
−
! '''Properties'''
+
! Properties
 
| Pointer to a PUARTProperties structure to fill in
 
| Pointer to a PUARTProperties structure to fill in
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| Replaced by UARTDeviceGetProperties for consistency
 
| Replaced by UARTDeviceGetProperties for consistency
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to get properties from
 
| The UART device to get properties from
 
|-
 
|-
−
! '''Properties'''
+
! Properties
 
| Pointer to a PUARTProperties structure to fill in
 
| Pointer to a PUARTProperties structure to fill in
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to set properties for
 
| The UART device to set properties for
 
|-
 
|-
−
! '''Properties'''
+
! Properties
 
| Pointer to a PUARTProperties structure to use
 
| Pointer to a PUARTProperties structure to use
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to new UART entry or nil if UART could not be created
 
| Pointer to new UART entry or nil if UART could not be created
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Size'''
+
! Size
 
| Size in bytes to allocate for new UART (Including the UART entry)
 
| Size in bytes to allocate for new UART (Including the UART entry)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to new UART entry or nil if UART could not be created
 
| Pointer to new UART entry or nil if UART could not be created
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to destroy
 
| The UART device to destroy
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to register
 
| The UART device to register
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to deregister
 
| The UART device to deregister
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UARTId'''
+
! UARTId
 
| The Id number of the UART to find
 
| The Id number of the UART to find
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to UART device entry or nil if not found
 
| Pointer to UART device entry or nil if not found
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Name'''
+
! Name
 
| The name of the UART to find (eg UART0)
 
| The name of the UART to find (eg UART0)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to UART device entry or nil if not found
 
| Pointer to UART device entry or nil if not found
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Description'''
+
! Description
 
| The description of the UART to find (eg BCM2836 PL011 UART)
 
| The description of the UART to find (eg BCM2836 PL011 UART)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to UART device entry or nil if not found
 
| Pointer to UART device entry or nil if not found
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Callback'''
+
! Callback
 
| The callback function to call for each UART in the table
 
| The callback function to call for each UART in the table
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| A private data pointer to pass to callback for each UART in the table
 
| A private data pointer to pass to callback for each UART in the table
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''UART'''
+
! UART
 
| The UART device to notify changes for (Optional, pass nil for all UART devices)
 
| The UART device to notify changes for (Optional, pass nil for all UART devices)
 
|-
 
|-
−
! '''Callback'''
+
! Callback
 
| The function to call when a notification event occurs
 
| The function to call when a notification event occurs
 
|-
 
|-
−
! '''Data'''
+
! Data
 
| A private data pointer to pass to callback when a notification event occurs
 
| A private data pointer to pass to callback when a notification event occurs
 
|-
 
|-
−
! '''Notification'''
+
! Notification
 
| The events to register for notification of (eg DEVICE_NOTIFICATION_REGISTER)
 
| The events to register for notification of (eg DEVICE_NOTIFICATION_REGISTER)
 
|-
 
|-
−
! '''Flags'''
+
! Flags
 
| The flags to control the notification (eg NOTIFIER_FLAG_WORKER)
 
| The flags to control the notification (eg NOTIFIER_FLAG_WORKER)
 
|-
 
|-
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceOpen instead
+
| Not intended to be called directly by applications, use SerialDeviceOpen instead.
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceClose instead
+
| Not intended to be called directly by applications, use SerialDeviceClose instead.
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceRead instead
+
| Not intended to be called directly by applications, use SerialDeviceRead instead.
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceWrite instead
+
| Not intended to be called directly by applications, use SerialDeviceWrite instead.
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceWait instead
+
| Not intended to be called directly by applications, use SerialDeviceWait instead.
 
|-
 
|-
 
|}
 
|}
Line 1,007: Line 1,022:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceStatus instead
+
| Not intended to be called directly by applications, use SerialDeviceStatus instead.
 
Replaced by UARTSerialDeviceGetStatus for consistency
 
Replaced by UARTSerialDeviceGetStatus for consistency
 
|-
 
|-
Line 1,020: Line 1,035:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceGetStatus instead
+
| Not intended to be called directly by applications, use SerialDeviceGetStatus instead.
 
|-
 
|-
 
|}
 
|}
Line 1,032: Line 1,047:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceSetStatus instead
+
| Not intended to be called directly by applications, use SerialDeviceSetStatus instead.
 
|-
 
|-
 
|}
 
|}
Line 1,044: Line 1,059:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
−
| Not intended to be called directly by applications, use SerialDeviceGetProperties instead
+
| Not intended to be called directly by applications, use SerialDeviceGetProperties instead.
 
|-
 
|-
 
|}
 
|}
Line 1,054: Line 1,069:
  
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
−
<pre style="border: 0; padding-bottom:0px;">function UARTGetCount:LongWord; inline;</pre>
+
<pre style="border: 0; padding-bottom:0px;">function UARTGetCount:LongWord;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current UART count</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current UART count</div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
Line 1,066: Line 1,081:
 
<br />
 
<br />
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
−
<pre style="border: 0; padding-bottom:0px;">function UARTDeviceGetDefault:PUARTDevice; inline;</pre>
+
<pre style="border: 0; padding-bottom:0px;">function UARTDeviceGetDefault:PUARTDevice;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default UART device</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default UART device</div>
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
Line 1,083: Line 1,098:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 
| None documented
 
| None documented
 
|-
 
|-
Line 1,095: Line 1,110:
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Note'''
+
! Note
 +
| None documented
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function UARTTypeToString(UARTType:LongWord):String;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a UART type value to a string</div>
 +
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<pre style="border: 0; padding-bottom:0px;">function UARTModeToString(UARTMode:LongWord):String;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a UART mode to a string</div>
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<pre style="border: 0; padding-bottom:0px;">function UARTStateToString(UARTState:LongWord):String;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Convert a UART state value to a string</div>
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Latest revision as of 02:33, 15 December 2022

Return to Unit Reference


Description

Ultibo UART Interface unit

UART (Universal Asynchronous Receiver Transmitter) devices represent the industry standard serial communications devices that are available on almost every system.

This unit implements the framework for UART devices and provides a standardized API to allow driver specific implementation to be abstracted. All UART devices are also represented as a serial device and this unit handles the relationship between the two devices.

Each UART device returns a set of properties that describe the capabilities of the device and includes a set of flags that indicate what features are supported.

Reads and writes to UART devices are unbuffered and simply pass raw data to and from the caller unless the serial interface is used instead which includes buffering of transmitted and received data. Both reads and writes allow for non blocking so that a caller can avoid waiting for received data to be available or the device to be ready to transmit.

Constants


[Expand]
UART specific constants UART_*


[Expand]
UART device type UART_TYPE_*


[Expand]
UART device mode UART_MODE_*


[Expand]
UART device state UART_STATE_*


[Expand]
UART device flag UART_FLAG_*


[Expand]
UART read flag UART_READ_*


[Expand]
UART write flag UART_WRITE_*


[Expand]
UART wait direction UART_WAIT_*


[Expand]
UART status flag UART_STATUS_*


[Expand]
UART logging UART_LOG_*


Type definitions


UART properties

[Expand]

PUARTProperties = ^TUARTProperties;

TUARTProperties = record

UART enumeration callback

TUARTEnumerate = function(UART:PUARTDevice; Data:Pointer):LongWord;

UART notification callback

TUARTNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;

UART device open

TUARTDeviceOpen = function(UART:PUARTDevice; BaudRate,DataBits,StopBits,Parity,FlowControl:LongWord):LongWord;

UART device close

TUARTDeviceClose = function(UART:PUARTDevice):LongWord;

UART device read

TUARTDeviceRead = function(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;

UART device write

TUARTDeviceWrite = function(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;

UART device wait

TUARTDeviceWait = function(UART:PUARTDevice; Direction,Timeout:LongWord):LongWord;

UART device get status

TUARTDeviceGetStatus = function(UART:PUARTDevice):LongWord;

UART device set status

TUARTDeviceSetStatus = function(UART:PUARTDevice; Status:LongWord):LongWord;

UART device get properties

TUARTDeviceGetProperties = function(UART:PUARTDevice; Properties:PUARTProperties):LongWord;

UART device set properties

TUARTDeviceSetProperties = function(UART:PUARTDevice; Properties:PUARTProperties):LongWord;

UART device

[Expand]

PUARTDevice = ^TUARTDevice;

TUARTDevice = record


Public variables


UART logging

UART_DEFAULT_LOG_LEVEL:LongWord = UART_LOG_LEVEL_DEBUG; Minimum level for UART messages. Only messages with level greater than or equal to this will be printed.
UART_LOG_ENABLED:Boolean;


Function declarations


Initialization functions

[Expand] 
procedure UARTInit;
Description: Initialize the UART unit and UART device table


UART functions

[Expand] 
function UARTDeviceOpen(UART:PUARTDevice; BaudRate,DataBits,StopBits,Parity,FlowControl:LongWord):LongWord;
Description: Open a UART device ready for sending and receiving


[Expand] 
function UARTDeviceClose(UART:PUARTDevice):LongWord;
Description: Close a UART device and terminate sending and receiving


[Expand] 
function UARTDeviceRead(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord;var Count:LongWord):LongWord;
Description: Read data from a UART device


[Expand] 
function UARTDeviceWrite(UART:PUARTDevice; Buffer:Pointer; Size,Flags:LongWord;var Count:LongWord):LongWord;
Description: Write data to a UART device


[Expand] 
function UARTDeviceWait(UART:PUARTDevice; Direction,Timeout:LongWord):LongWord;
Description: Wait for data to be available in the receive or transmit FIFO of a UART device


[Expand] 
function UARTDeviceStatus(UART:PUARTDevice):LongWord; inline;
Description: Get the current line status of a UART device


[Expand] 
function UARTDeviceGetStatus(UART:PUARTDevice):LongWord;
Description: Get the current line status of a UART device


[Expand] 
function UARTDeviceSetStatus(UART:PUARTDevice;Status:LongWord):LongWord;
Description: Set the current line status of a UART device


[Expand] 
function UARTDeviceProperties(UART:PUARTDevice; Properties:PUARTProperties):LongWord; inline;
Description: Get the properties for the specified UART device


[Expand] 
function UARTDeviceGetProperties(UART:PUARTDevice;Properties:PUARTProperties):LongWord;
Description: Get the properties for the specified UART device


[Expand] 
function UARTDeviceSetProperties(UART:PUARTDevice; Properties:PUARTProperties):LongWord;
Description: Set the properties for the specified UART device


[Expand] 
function UARTDeviceCreate:PUARTDevice;
Description: Create a new UART entry


[Expand] 
function UARTDeviceCreateEx(Size:LongWord):PUARTDevice;
Description: Create a new UART entry


[Expand] 
function UARTDeviceDestroy(UART:PUARTDevice):LongWord;
Description: Destroy an existing UART entry


[Expand] 
function UARTDeviceRegister(UART:PUARTDevice):LongWord;
Description: Register a new UART in the UART table


[Expand] 
function UARTDeviceDeregister(UART:PUARTDevice):LongWord;
Description: Deregister a UART from the UART table


[Expand] 
function UARTDeviceFind(UARTId:LongWord):PUARTDevice;
Description: Find a UART device by Id in the UART table


[Expand] 
function UARTDeviceFindByName(const Name:String):PUARTDevice; inline;
Description: Find a UART device by name in the UART table


[Expand] 
function UARTDeviceFindByDescription(const Description:String):PUARTDevice; inline;
Description: Find a UART device by description in the UART table


[Expand] 
function UARTDeviceEnumerate(Callback:TUARTEnumerate; Data:Pointer):LongWord;
Description: Enumerate all UART devices in the UART table


[Expand] 
function UARTDeviceNotification(UART:PUARTDevice; Callback:TUARTNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: Register a notification for UART device changes


UART serial functions

[Expand] 
function UARTSerialDeviceOpen(Serial:PSerialDevice; BaudRate,DataBits,StopBits,Parity,FlowControl,ReceiveDepth,TransmitDepth:LongWord):LongWord;
Description: Implementation of SerialDeviceOpen API for UART Serial


[Expand] 
function UARTSerialDeviceClose(Serial:PSerialDevice):LongWord;
Description: Implementation of SerialDeviceClose API for UART Serial


[Expand] 
function UARTSerialDeviceRead(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Implementation of SerialDeviceRead API for UART Serial


[Expand] 
function UARTSerialDeviceWrite(Serial:PSerialDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Implementation of SerialDeviceWrite API for UART Serial


[Expand] 
function UARTSerialDeviceWait(Serial:PSerialDevice; Direction,Timeout:LongWord; var Count:LongWord):LongWord;
Description: Implementation of SerialDeviceWait API for UART Serial


[Expand] 
function UARTSerialDeviceStatus(Serial:PSerialDevice):LongWord; inline;
Description: Implementation of SerialDeviceStatus API for UART Serial


[Expand] 
function UARTSerialDeviceGetStatus(Serial:PSerialDevice):LongWord;
Description: Implementation of SerialDeviceGetStatus API for UART Serial


[Expand] 
function UARTSerialDeviceSetStatus(Serial:PSerialDevice; Status:LongWord):LongWord;
Description: Implementation of SerialDeviceSetStatus API for UART Serial


[Expand] 
function UARTSerialDeviceGetProperties(Serial:PSerialDevice;Properties:PSerialProperties):LongWord;
Description: Implementation of SerialDeviceGetProperties API for UART Serial


UART helper functions

[Expand] 
function UARTGetCount:LongWord;
Description: Get the current UART count


[Expand] 
function UARTDeviceGetDefault:PUARTDevice;
Description: Get the current default UART device


[Expand] 
function UARTDeviceSetDefault(UART:PUARTDevice):LongWord;
Description: Set the current default UART device


[Expand] 
function UARTDeviceCheck(UART:PUARTDevice):PUARTDevice;
Description: Check if the supplied UART is in the UART table


[Expand] 
function UARTTypeToString(UARTType:LongWord):String;
Description: Convert a UART type value to a string


[Expand] 
function UARTModeToString(UARTMode:LongWord):String;
Description: Convert a UART mode to a string


[Expand] 
function UARTStateToString(UARTState:LongWord):String;
Description: Convert a UART state value to a string


[Expand] 
procedure UARTLog(Level:LongWord;UART:PUARTDevice; const AText:String);
Description: To be documented


[Expand] 
procedure UARTLogInfo(UART:PUARTDevice; const AText:String); inline;
Description: To be documented


[Expand] 
procedure UARTLogWarn(UART:PUARTDevice; const AText:String); inline;
Description: To be documented


[Expand] 
procedure UARTLogError(UART:PUARTDevice; const AText:String); inline;
Description: To be documented


[Expand] 
procedure UARTLogDebug(UART:PUARTDevice; const AText:String); inline;
Description: To be documented


UART serial helper functions

[Expand] 
function UARTSerialDeviceReceive(UART:PUARTDevice):LongWord;
Description: Read data from a UART device into the receive buffer of the associated Serial device


[Expand] 
function UARTSerialDeviceTransmit(UART:PUARTDevice):LongWord;
Description: Write data to a UART device from the transmit buffer of the associated Serial device


Return to Unit Reference

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