Posted on May 15, 2017 at 10:47I'm working on STM32 nucleo432lkc. I'm trying to divide the MSI frequency for the timer by 50 but when I try this , i get nothing on the ouput of the pin. Below is the timer 2 code :
void TIM2_init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;
__TIM2_CLK_ENABLE();
TIM_init_struct.Instance = TIM2;
TIM_init_struct.Init.Prescaler = 0 ;//40000;
TIM_init_struct.Init.CounterMode = TIM_COUNTERMODE_UP;
TIM_init_struct.Init.Period = 0 ;//491;
TIM_init_struct.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
TIM_init_struct.Init.RepetitionCounter = 0;
//HAL_TIM_Base_Init(&TIM_init_struct);
if(HAL_TIM_Base_Init(&TIM_init_struct)== HAL_OK)
{
/* Start the TIM time Base generation in interrupt mode */
HAL_TIM_Base_Start_IT(&TIM_init_struct);
}
HAL_NVIC_SetPriority(TIM2_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(TIM2_IRQn);
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&TIM_init_struct, &sClockSourceConfig) != HAL_OK)
{
TIM_Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&TIM_init_struct, &sMasterConfig) != HAL_OK)
{
TIM_Error_Handler();
}
}
void TIM2_IRQHandler()
{
//}
HAL_TIM_IRQHandler(&TIM_init_struct);
}
#include 'stdbool.h'
bool test = false;
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
int timerValue = HAL_RCC_GetSysClockFreq();
if (test) {
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_RESET);
test = false;
} else {
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, GPIO_PIN_SET);
test = true;
}
// HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_0);
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_3);
}
