TouchGFX with STM32F767ZI, ILI9341 SPI display

[EBesh.1]

Hello,

I am trying to use TouchGFX with STM32F767ZI with a TFT SPI ILI9341 display. I have tried compiling the code using both STM32 Cube IDE and KEIL u5. With Cube IDE, the code does compile but I do not have any output on the screen (I am using the libraries provided for this display that have the functions to draw bit map and set window), whereas with KEIL I get many L6869W warnings and the project doesn't build. I have also tried switching to STM32F411, but I am experiencing the same problem. It would be greatly appreciated if you could assist me with that.

[EBesh.1]

@Martin KJELDSEN​ please can you help me with that

[Martin KJELDSEN]

Hi,

Did you debug the communication to the display with a logic analyzer/scope? Is anything happening over SPIx ?

/Martin

[EBesh.1]

when calling MX_TouchGFX_Process() in while(1), my logic analyzer doesn't show anything at all and the fault might be with my settings.

However, I used an oscilloscope and I see 8 clock cycles ( I am using SPI - 8bit). Still the clock signal is very disturbed ( I m using 25MHz as SPI CLK speed). I checked all other lines and don't know why MOSI is always high.

[MM..1]

TouchGFX and SPI displays is custom mode. You need implement parts code for hw manage.

Read docu and create first clean working code ...

[EBesh.1]

I am following this tutorial https://www.youtube.com/watch?v=suMytEyQTP4&t=662s and I use TouchGFX_DataTransfer.h and TouchGFX_DataTransfer.c for connecting TouchGFX with SPI but still it doesn't work.

The functions are as follows :

/* Functions called by the TouchGFX HAL to invoke the actual data transfer to ILI9341.

 * Pero, 2021

 */

#ifndef TOUCHGFX_DATATRANSFER_H

#define TOUCHGFX_DATATRANSFER_H

#include <stdint.h>

#ifdef __cplusplus

 extern "C" {

#endif

void touchgfxDisplayDriverTransmitBlock(uint8_t* pixels, uint16_t x, uint16_t y, uint16_t w, uint16_t h);

uint32_t touchgfxDisplayDriverTransmitActive(void);

#ifdef __cplusplus

}

#endif

#endif

__________________________________________________________________________

/* Functions called by the TouchGFX HAL to invoke the actual data transfer to ILI9341.

 * Pero, 2021

 */

#include "ili9341.h"

#include "TouchGFX_DataTransfer.h"

extern void DisplayDriver_TransferCompleteCallback();

static uint8_t isTransmittingData = 0;

uint32_t touchgfxDisplayDriverTransmitActive(void)

{

return isTransmittingData;

}

void touchgfxDisplayDriverTransmitBlock(uint8_t* pixels, uint16_t x, uint16_t y, uint16_t w, uint16_t h)

{

isTransmittingData = 1;

ILI9341_SetWindow(x, y, x+w-1, y+h-1);

ILI9341_DrawBitmap(w, h, pixels);

}

void HAL_SPI_TxCpltCallback(SPI_HandleTypeDef *hspi)

{

if (hspi->Instance == SPI1) {

ILI9341_EndOfDrawBitmap();

isTransmittingData = 0;

DisplayDriver_TransferCompleteCallback();

}

}

[MM..1]

Have you tested

ILI9341_SetWindow(x, y, x+w-1, y+h-1);
ILI9341_DrawBitmap(w, h, pixels);

work without touchgfx . Scope you SPI and control signals...

Is your pinout config ok in code ?