My touchgfx GUI is freezing on my custom LCD running on STM32 MCU. I checked signalVSync is always triggered . What could be the problem ?
Here is my OSWrapper code
using namespace touchgfx;
static xSemaphoreHandle frame_buffer_sem;
static xQueueHandle vsync_q = 0;
// Just a dummy value to insert in the VSYNC queue.
static uint8_t dummy = 0x5a;
void OSWrappers::initialize()
{
vSemaphoreCreateBinary(frame_buffer_sem);
// Create a queue of length 1
vsync_q = xQueueGenericCreate(1, 1, 0);
}
void OSWrappers::takeFrameBufferSemaphore()
{
xSemaphoreTake(frame_buffer_sem, portMAX_DELAY);
}
void OSWrappers::giveFrameBufferSemaphore()
{
xSemaphoreGive(frame_buffer_sem);
}
void OSWrappers::tryTakeFrameBufferSemaphore()
{
xSemaphoreTake(frame_buffer_sem, 0);
}
void OSWrappers::giveFrameBufferSemaphoreFromISR()
{
// Since this is called from an interrupt, FreeRTOS requires special handling to trigger a
// re-scheduling. May be applicable for other OSes as well.
portBASE_TYPE px = pdFALSE;
xSemaphoreGiveFromISR(frame_buffer_sem, &px);
portEND_SWITCHING_ISR(px);
}
void OSWrappers::signalVSync()
{
if (vsync_q)
{
// Since this is called from an interrupt, FreeRTOS requires special handling to trigger a
// re-scheduling. May be applicable for other OSes as well.
portBASE_TYPE px = pdFALSE;
xQueueSendFromISR(vsync_q, &dummy, &px);
portEND_SWITCHING_ISR(px);
}
}
void OSWrappers::waitForVSync()
{
// First make sure the queue is empty, by trying to remove an element with 0 timeout.
xQueueReceive(vsync_q, &dummy, 0);
// Then, wait for next VSYNC to occur.
xQueueReceive(vsync_q, &dummy, portMAX_DELAY);
}
void OSWrappers::taskDelay(uint16_t ms)
{
vTaskDelay(ms);
}
static portBASE_TYPE IdleTaskHook(void* p)
{
if ((int)p) //idle task sched out
{
touchgfx::HAL::getInstance()->setMCUActive(true);
}
else //idle task sched in
{
touchgfx::HAL::getInstance()->setMCUActive(false);
}
return pdTRUE;
}
