Two threads randomly crash，When I have two threads, the touchgfx Sometimes randomly crashes。I debugged and found that the OSWrappers::waitForVSync() is not executed​

[ZFeng.1]

I used cubemx to configure the DMA2D,LDTC ,DSIHOST, GFXMMU,and FreeRTOS. I have two threads configured as follows

const osThreadAttr_t Logic_ProcessTask_attributes = {

 .name = "Logic_ProcessTask",

 .priority = (osPriority_t) osPriorityBelowNormal,

 .stack_size = 1024 * 1

};

const osThreadAttr_t GuiTask_attributes = {

 .name = "GuiTask",

 .priority = (osPriority_t) osPriorityNormal,

 .stack_size = 4096 * 4

};

void StartGuiTask(void *argument)

{

MX_TouchGFX_Process();

 for(;;)

 {

  osDelay(1);

 }

}

The logical tasks are as follows：

void Logic_ProcessTask(void *argument)

{

static unsigned int msCount = 0;

 /* Infinite loop */

 for(;;)

 {

msCount++;

if(msCount % 100 == 0)

{

HAL_GPIO_TogglePin(LED_GPIO_Port,LED_Pin); //Toggel LED

}

  osDelay(1);

 }

} 

The content of the gui task is to display the time, which is generated by TouchGFX Designer。

When I don’t create the Logic_ProcessTask, the StartGuiTask is working OK。 but When I created the Logic_ProcessTask, the StartGuiTask task sometimes crashes.

I debugged and found that when the StartGuiTask crashed, the OSWrappers::signalVSync()

is working，but the OSWrappers::waitForVSync() is not executed​。 I don't know why。

Thanks a lot

[Romain DIELEMAN]

Hi,

Digging this up. Have you been able to fix your issue ? On which mcu were you working ? I seem to have faced the same thing with a STM32L4R9dk.

/Romain

[ZFeng.1]

Thank you very much for your answer. The mcu I use is STM32L4R9VGT6. Our design scheme is the reference STM32L4R9I-disco .I tried many methods, but I couldn’t solve it，If this problem occurs, is there any way to recover it？

[Tesla DeLorean]

Wasn't there some issue with the pins in the schematic, vs those in the code defines of the bsp?

The TE pin? Off by one.

Will fish when back on a computer..​

[ZFeng.1]

Thank you very much for your answer. I tested it. When I used the above example on the STM32L4R9I-disco, it was normal when I didn't add my simple thread. When I added it, it sometimes crashed.When I added a simple thread, I checked it, and the stack did not overflow. The simple thread was running normally, but the Show crashed. My simple thread is as follows

unsigned int test_val;

 for(;;)

 {

test_val++;

if(test_val >= 1000)

test_val = 0;

   osDelay(1);

 }

I will try to re-port it completely, hoping to find the problem.