Hello,
I am using a sTM32L430 with a JTAG access throgh ST LINK V2 and STM32CubeIDE. The project has a few GPIO to debug and an USART to generate interrupts:
To try to undersand my problem I build a small project with STM32CubeMX to have code genrated by STM and not by me.
I added a few code to remove data from the USART BX buffer and to toggle debug pins.
void USART3_IRQHandler(void)
{
/* USER CODE BEGIN USART3_IRQn 0 */
int val;
/* USER CODE END USART3_IRQn 0 */
/* USER CODE BEGIN USART3_IRQn 1 */
LL_GPIO_TogglePin(GPIOH, LL_GPIO_PIN_0);
val = LL_USART_ReceiveData8(USART3); //read byte to clear RXNE flag
val++;
/* USER CODE END USART3_IRQn 1 */
}int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
/* System interrupt init*/
NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* SysTick_IRQn interrupt configuration */
NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),15, 0));
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART3_UART_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
__delay_cycles(1000000);
LL_GPIO_TogglePin(GPIOH, LL_GPIO_PIN_1); // Green led
}
/* USER CODE END 3 */
}
I load and run the program. If an interrupt occurs during debugging I have the following issue:
Program stops (led do not toggles) and current consumption increases from 2mA to 14mA. If I click on the suspend button I have the following message:
Break at address "0x1fff3f36" with no debug information available, or outside of program code.
This address is inside the System memory.
When I have interrupts while not in debugging mode there is no issue at all.
Do you have any suggestion for this issue which prevents me of debugging capabilities?
Best regards
Mich
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