HardFault TouchGFX

[pokitoz]

Hello,

I am using TouchGFX with freeRTOS on an STM32G0 board.
I call the touchgfxSignalVSync through a Timer Interrupt and quickly after I get an HardFault in the blitCopyARGB8888 function. As this is a library I cannot debug further. I am trying to go around the issue by increasing the stack size (24*3072 = 73728 bytes) but this does not fix the issue. Commenting the draw function in the touchgfxDisplayDriverTransmitBlock function does not help either.

Doing a step by step debug, I see that the load looks to be the issue where the address 0x2000cXXX is loaded.

Let me know if you need any more information.

Thanks!

if (htim->Instance == TIM4) {

touchgfxSignalVSync();

}

[GaetanGodart]

Hello @pokitoz ,

Can you try to set your "Number of blocks" in STM32CubeMX to 4 instead of 3?

Regards,

[pokitoz]

Hello Gaetan,

Thanks for the reply.

I had to lower the buffer from 8K to 4K to use 4 buffers because of memory constraints.

However, I still get an issue:

Do you have a sample configuration using an external flash, STM32G0, CMSISv1 and Partial Frame buffer ?

Best,

[pokitoz · Accepted solution]

The issue was not direcly linked to touchGFX but from the fact that the code/data were exceeding a bank in flash

Updating PREFETCH_ENABLE macro in stm32g0xx_hal_conf.h helped

// It seems that we can get some trouble with Prefetch failure when branching across flash memory bank
// See Device Errata. So we disable the prefetch. Code might be slower after this setting
// This value is already in HAL_Init
// https://www.st.com/resource/en/errata_sheet/es0549-stm32g0c1xcxe-device-errata-stmicroelectronics.pdf
// 2.2.10 Prefetch failure when branching across flash memory banks
#define  PREFETCH_ENABLE              0U