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Bodmer / TFT_eSPI

Arduino and PlatformIO IDE compatible TFT library optimised for the Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different driver chips
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Color Missing STM32F401CCU6 with 320QDT_9341 #3086

Closed mannapijush1coretech closed 6 months ago

mannapijush1coretech commented 6 months ago

Color Missing and graphics drawing problem when using this library

the main problem is when i used RGB Color Mode then Blue is missing and if i use BGR then Red Is missing

Arduino IDE using Latest Library Version 2.5.43 STM32F401CCU6 Black Pill 320QDT_9341 (i assumed this IL9341) Running on 8Bit Parallel Mode

Connection as defined in _Setup35_ILI9341_STM32_PortBus.h `

define TFT_CS PB7 // Chip select control pin

define TFT_DC PB8 // Data Command control pin

define TFT_RST PB0 // Reset pin

define TFT_WR PB9 // Write strobe control pin

define TFT_RD PB1 // Read pin

define TFT_D0 PA0 // 8-bit Port A parallel bus to TFT

define TFT_D1 PA1

define TFT_D2 PA2

define TFT_D3 PA3

define TFT_D4 PA4

define TFT_D5 PA5

define TFT_D6 PA6

define TFT_D7 PA7

` i tried all type of sketches provided in the example _screenshot i am attaching for Arc_Meter_Demo here is the display -- image

when using BGR Mode-- image

and when using RGB Mode -- image

i think last color is missing in the specified color order kindly help for fixing this issue

Chineko-Koizumi commented 6 months ago

Not sure if it is your case, but when I did try parallel mode on display that supported both 8 bit mode and 16 bit mode. I stumble across same color issue. I fact that was not TFT_eSPI library bug but screen hardware configuration. My screen out of the box supported only 16 bit and after some searching and asking provider I got reply that by default display supports only 16 bit so screen get only half of the information thus one color is visible (to change mode I had to solder resistor to other pad in the PCB). Check documentation if this display supports 8 bit out of the box, but my guess is that shorting this pads would change mode from 16 bits to 8 bits(Hi or Lo word) image

mannapijush1coretech commented 6 months ago

ok there is 2 jumper one is jp1 and another jp3. i both soldered one by one and checked but the problem remains same!

The fact you are telling about 16bit is i think correct means if i pullup other data pin 8-15 of display then the display color got changed and and strip pattern is gone but in the library there is no 16 bit parallal support for this board means STM32 and IL9341

i need to change mode to 8bit or author want to add support this in 16 bit mode that i dont know how i am fiddling with library to support that but if anyone want to help pls reply

Bodmer commented 6 months ago

The library only supports 8 bit parallel with the STM32F processors. You will need an 8 bit parallel display or modify your board to work in 8 bit mode. I am not able to advise how to do this as that is not a board I am familiar with. The vendor may be able to help.