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esp-arduino-libs / ESP32_Display_Panel

Arduino library of driving display panel for the ESP SoCs
Apache License 2.0
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ESP_PANEL_LCD_RGB_IO_DATAx pins mapping to display RGB pins #58

Open wavejaco opened 1 week ago

wavejaco commented 1 week ago

For a custom board, the GPIO pin layout is specified in the _ESP_Panel_BoardCustom.h file. These pins are named ESP_PANEL_LCD_RGB_IO_DATA0 up to ESP_PANEL_LCD_RGB_IO_DATA15. For a board such as the Waveshare ESP32-S3 4.3 inch display module, the LCD pin layout is described in terms of R, G and B pins. Below is an extract from the above site:

RGB pins

How do these pins (R3-R7, G2-G7 and B3-B7) map to the pins ESP_PANEL_LCD_RGB_IO_DATAx (x = 0 to 15) in _ESP_Panel_BoardCustom.h?

Lzw655 commented 5 days ago

Hi @wavejaco,

Sorry for the delay. The ESP32-S3 only supports 16-bit RGB565 and 8-bit RGB888. Typically, we connect a 24-bit RGB888 LCD by only using the high bits, as illustrated in the table below.

RGB888 Bit RGB IO LCD Bit
Bit 0 - B0
Bit 1 - B1
Bit 2 - B2
Bit 3 DATA0 B3
Bit 4 DATA1 B4
Bit 5 DATA2 B5
Bit 6 DATA3 B6
Bit 7 DATA4 B7
Bit 8 - G0
Bit 9 - G1
Bit 10 DATA5 G2
Bit 11 DATA6 G3
Bit 12 DATA7 G4
Bit 13 DATA8 G5
Bit 14 DATA9 G6
Bit 15 DATA10 G7
Bit 16 - R0
Bit 17 - R1
Bit 18 - R2
Bit 19 DATA11 R3
Bit 20 DATA12 R4
Bit 21 DATA13 R5
Bit 22 DATA14 R6
Bit 23 DATA15 R7