I have STM32G070RBT6, a timer is set to give interrupt every 1 second, in interrupt i am incrementing a variable timer_var1 then in main file while loop i am dividing this by 10 and assigning this value to another variable TIMER_NOW.
Now when timer_var1 hits value 389(decimal) it rolls over to 255(dec).
there is nothing else in the while loop.
i am not able to figure out how is it possible.
code:
volatile uint16_t timer_var1=0,TEMP,TIMER_PREV=0,TIMER_NOW=0;
while (1)
{
TIMER_NOW=timer_var1/10;
// if(TIMER_NOW>TIMER_PREV){
// COR_Y[TIMER_NOW]=270-TEMP-TIMER_NOW*2;
// COR_X[TIMER_NOW]=TIMER_NOW*7;
// TIMER_PREV=TIMER_NOW;}
// DWIN_DRAW_LINE(0x5000, COR_X,COR_Y, TIMER_NOW);
// HAL_UARTEx_ReceiveToIdle_IT(&huart1, RX_BUFF_LCD, 16);
HAL_Delay(300);
HAL_GPIO_TogglePin(STATUS_GPIO_Port, STATUS_Pin);
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
In interrupt file:
/* USER CODE BEGIN PV */
extern volatile unsigned int DataPos;
extern volatile unsigned char RX_BUF[256u];
extern volatile uint16_t timer_var1;
/* USER CODE END PV */
void TIM1_BRK_UP_TRG_COM_IRQHandler(void)
{
/* USER CODE BEGIN TIM1_BRK_UP_TRG_COM_IRQn 0 */
timer_var1++;
/* USER CODE END TIM1_BRK_UP_TRG_COM_IRQn 0 */
HAL_TIM_IRQHandler(&htim1);
/* USER CODE BEGIN TIM1_BRK_UP_TRG_COM_IRQn 1 */
/* USER CODE END TIM1_BRK_UP_TRG_COM_IRQn 1 */
}
