Posted on April 21, 2016 at 18:03
Hi all
I’m trying to synchronize 2 general pourpose timers ( TIM3 and TIM4 ) on stm32f401re , and firing an interrupt on every trigger signal ( which will toggle LD2 led ) , but nothing happen :
TIM3 should fire a TRGO signal on every counter overflow ( about 1Hz ) , and clock TIM4 through ITR2.
An interrupt should be fired on TRGO
Timers configuration is the following :
void
MX_TIM3_Init(
void
)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;
htim3.Instance = TIM3;
htim3.Init.Prescaler = 1200;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 65535;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&htim3);
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_ENABLE;
HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig);
}
/* TIM4 init function */
void
MX_TIM4_Init(
void
)
{
TIM_SlaveConfigTypeDef sSlaveConfig;
TIM_MasterConfigTypeDef sMasterConfig;
htim4.Instance = TIM4;
htim4.Init.Prescaler = 0;
htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
htim4.Init.Period = 10;
htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&htim4);
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;
sSlaveConfig.InputTrigger = TIM_TS_ITR2;
HAL_TIM_SlaveConfigSynchronization_IT(&htim4, &sSlaveConfig);
}
and the isr callback is the following
void
HAL_TIM_TriggerCallback(TIM_HandleTypeDef *htim){
if
(htim->Instance==TIM4){
HAL_GPIO_TogglePin(GPIOA,GPIO_PIN_5);
}
}
other parts of the code are automatically generated with stm32cubemx ( system init and TIM4_IRQHandler )
do you know why it doesn’t work ?
