Unit ST77XX
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Description
Sitronix ST77XX TFT LCD Driver unit
The ST77XX is a family of single-chip controllers/drivers for color, graphic type TFT-LCD display.
Instantiate the ST77XX driver by calling ST77XXFramebufferCreate() with the required parameters:
SPI: The SPI device that this ST77XX is connected to
ChipSelect: The SPI chip select to use when communicating with this device
Name: The text description of this device which will show in the device list (Optional)
Rotation: The rotation value for the framebuffer device (eg FRAMEBUFFER_ROTATION_180)
Width: The width of the framebuffer in pixels
Height: The height of the framebuffer in pixels
ColStart:
RST: GPIO pin information for the Reset pin (Optional)
DC: GPIO pin information for the Data/Command pin
BL: GPIO pin information for the Backlight pin (Optional)
Constants
ST77XX specific constants
ST77XX_* ST77XX_FRAMEBUFFER_DESCRIPTION = 'ST77XX TFT LCD DRIVER';
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Description of ST77XX device |
ST77XX SPI
ST77XX_SPI_* ST77XX_SPI_RATE = 32000000;
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Default SPI clock rate |
ST_CMD_DELAY = $80;
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Special signifier for command lists |
ST77XX control command
ST77XX_* ST77XX_NOP = $00;
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8.2.1. NOP: No Operation |
ST77XX_SWRESET = $01;
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8.2.2. SWRESET: Software Reset |
ST77XX_RDDID = $04;
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new_cmd |
ST77XX_RDDST = $09;
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new_cmd |
ST77XX_SLPIN = $10;
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new_cmd |
ST77XX_SLPOUT = $11;
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8.2.12. SLPOUT: Sleep Out (This command turns off sleep mode) |
ST77XX_PTLON = $12;
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new_cmd |
ST77XX_NORON = $13;
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new_cmd |
ST77XX_INVOFF = $20;
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new_cmd |
ST77XX_INVON = $21;
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new_cmd |
ST77XX_GAMSET = $26;
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8.2.17. GAMSET: Gamma Set (This command is used to select the desired Gamma curve for the current display) |
ST77XX_DISPOFF = $28;
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8.2.18. DISPOFF: Display OFF (This command is used to enter into DISPLAY OFF mode. In this mode, the output from Frame Memory is disabled and blank page inserted) |
ST77XX_DISPON = $29;
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8.2.19. DISPON: Display ON (This command is used to recover from DISPLAY OFF mode. Output from the Frame Memory is enabled) |
ST77XX_CASET = $2A;
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8.2.20. CASET: Column Address Set (This command is used to define area of frame memory where MCU can access) |
ST77XX_RASET = $2B;
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8.2.21. PASET: Page Address Set (This command is used to define area of frame memory where MCU can access) |
ST77XX_RAMWR = $2C;
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8.2.22. Memory Write (This command is used to transfer data from MCU to frame memory) |
ST77XX_RGBSET = $2D;
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Color setting for 4096, 64K and 262K colors |
ST77XX_RAMRD = $2E;
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new_cmd |
ST77XX_RDDPM = $0A;
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Read display power mode |
ST77XX_RDD_MADCTL = $0B;
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Read display MADCTL |
ST77XX_RDD_COLMOD = $0C;
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Read display pixel format |
ST77XX_RDDIM = $0D;
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Read display image mode |
ST77XX_RDDSM = $0E;
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Read display signal mode |
ST77XX_RDDSR = $0F;
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Read display self-diagnostic result (ST7789V) |
ST77XX_PTLAR = $30;
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new_cmd |
ST77XX_VSCRDEF = $33;
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Vertical scrolling definition (ST7789V) |
ST77XX_TEOFF = $34;
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Tearing effect line off |
ST77XX_TEON = $35;
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Tearing effect line on |
ST77XX_MADCTL = $36;
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8.2.29. MADCTL: Memory Access Control (This command defines read/write scanning direction of frame memory) |
ST77XX_IDMOFF = $38;
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Idle mode off |
ST77XX_IDMON = $39;
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Idle mode on |
ST77XX_RAMWRC = $3C;
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Memory write continue (ST7789V) |
ST77XX_RAMRDC = $3E;
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Memory read continue (ST7789V) |
ST77XX_COLMOD = $3A;
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8.2.33. COLMOD: Pixel Format Set (This command sets the pixel format for the RGB image data used by the interface) |
ST77XX memory access control
ST77XX_*CTL_* | See ST77XX datasheet 8.2.29. Memory Access Control | |
ST77XX_MADCTL_MY = $80;
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Row Address Order |
ST77XX_MADCTL_MX = $40;
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Column Address Order |
ST77XX_MADCTL_MV = $20;
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Row / Column Exchange |
ST77XX_MADCTL_ML = $10;
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Row / Column Exchange |
ST77XX_MADCTL_MH = $04;
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Horizontal Refresh Order |
ST77XX_MADCTL_RGB = $00;
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Colour selector switch control (0=RGB colour filter panel, 1=BGR colour filter panel) |
ST77XX_MADCTL_BGR = $08;
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ST77XX_RAMCTRL = $B0;
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RAM control |
ST77XX_RGBCTRL = $B1;
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RGB control |
ST77XX_PORCTRL = $B2;
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Porch control |
ST77XX_FRCTR1 = $B3;
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8.3.2. FRCTR1: Frame Rate Control (In Normal Mode/Full Colors) |
ST77XX_PARCTRL = $B5;
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Partial mode control |
ST77XX_GCTRL = $B7;
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Gate control |
ST77XX_GTADJ = $B8;
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Gate on timing adjustment |
ST77XX_DGMEN = $BA;
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Digital gamma enable |
ST77XX_VCOMS = $BB;
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VCOMS setting |
ST77XX_DISCTRL = $B6;
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8.3.7. DISCTRL: Display Function Control |
ST77XX_LCMCTRL = $C0;
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LCM control |
ST77XX_IDSET = $C1;
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ID setting |
ST77XX_VDVVRHEN = $C2;
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VDV and VRH command enable |
ST77XX_VRHS = $C3;
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VRH set |
ST77XX_VDVSET = $C4;
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VDV setting |
ST77XX_VCMOFSET = $C5;
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VCOMS offset set |
ST77XX_FRCTR2 = $C6;
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FR Control 2 |
ST77XX_CABCCTRL = $C7;
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CABC control |
ST77XX_REGSEL1 = $C8;
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Register value section 1 |
ST77XX_REGSEL2 = $CA;
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Register value section 2 |
ST77XX_PWMFRSEL = $CC;
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PWM frequency selection |
ST77XX_PWCTRL1 = $D0;
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8.3.16. PWCTRL1: Power Control 1 |
ST77XX_VAPVANEN = $D2;
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Enable VAP/VAN signal output |
ST77XX_CMD2EN = $DF;
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Command 2 enable |
ST77XX_VMCTRL1 = $C5;
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8.3.21. VMCTRL1: VCOM Control 1 |
ST77XX_VMCTRL2 = $C7;
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8.3.22. VMCTRL2: VCOM Control 2 |
ST77XX_PGAMCTRL = $E0;
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Positive voltage gamma control |
ST77XX_NGAMCTRL = $E1;
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Negative voltage gamma control |
ST77XX_DGMLUTR = $E2;
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Digital gamma look-up table for red |
ST77XX_DGMLUTB = $E3;
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Digital gamma look-up table for blue |
ST77XX_GATECTRL = $E4;
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Gate control |
ST77XX_SPI2EN = $E7;
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SPI2 enable |
ST77XX_PWCTRL2 = $E8;
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Power control 2 |
ST77XX_EQCTRL = $E9;
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Equalize time control |
ST77XX_PROMCTRL = $EC;
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Program control |
ST77XX_PROMEN = $FA;
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Program mode enable |
ST77XX_NVMSET = $FC;
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NVM setting |
ST77XX_PROMACT = $FE;
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Program action |
ST77XX_COLOR_MODE_16bit =$55;
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ST77XX_COLOR_MODE_18bit =$66;
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Type definitions
To be documented
Public variables
None defined
Function declarations
To be documented
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