STM32L072/82 trouble with timeout HAL_SPI_Receive() / HAL_getTick()

[Julien Weber]

Dear comunity,

I'm having some trouble using the SPI communication protocol between two MCU.

The aim is to transfer data via SPI(2) from MCU to a Murata MLM32L07x01 (based on STM32L072).

In my program, I'm using also UART2 / ADC / RTC / LoRa communication (SPI1) / GPIOs.

When I want to transfer data, I'm using the HAL_SPI_Receive function in the Murata like this :

HAL_SPI_Receive(&hspi2, aRxBuffer, sizeOfSPI, 3000);

If the variable sizeOfSPI is right, I received well the data and my program is following. However, when I don't know the size of SPI transfer (assuming I'm waiting for 80 char and I received only 60), I still receive the transfer char but the Timeout parameter should be used. In the case above, knowing the SPI is in polling mode, it should wait for 3 seconds maximum.

However, my program is going into an infinite loop. When I try to debug the software, I see a weird value from the HAL library :

In the SPI_WaitOnFlagUntilTimeout function, the call of HAL_GetTick returns 0 :

static HAL_StatusTypeDef SPI_WaitOnFlagUntilTimeout(SPI_HandleTypeDef *hspi, uint32_t Flag, FlagStatus Status, uint32_t Timeout)  
{
  uint32_t tickstart = 0U;
 
  /* Get tick */ 
  tickstart = HAL_GetTick();

There is my definition of SysTick_Handler :

void SysTick_Handler(void)
{
  HAL_IncTick();
	HAL_SYSTICK_IRQHandler();
}

How can I manage to get work the HAL_GetTick function ?

[Tesla DeLorean · Accepted solution]

Need to make sure SysTick is enabled, and it has a higher priority than other interrupts and callbacks you might have dependencies in.​

[Julien Weber]

Thank you for notice this solution, you were right, the priority was the problem.

I though I fixed this issue before in the code but there are multiple calling of HAL_NVIC_SetPriority and it was a declaration in stm32l0xx_hal_conf.h which cause trouble:

#define  TICK_INT_PRIORITY            (((uint32_t)1<<__NVIC_PRIO_BITS) - 1)    /*!< tick interrupt priority */   

I changed it by choosing first priority :

#define TICK_INT_PRIORITY ((uint32_t)0U)

Best regards!