Posted on November 17, 2015 at 22:37Hi there,
I have been trying to replicate the PWM script above in the stm32f429i disco board without any success. The program compiles with no errors and, in debugging mode, I check that the program reaches the infinite loop with no problems. However, I am not able to see the PWM signal from the PA7 pin. Could you help? please.
Please find the full code below:
int
main(int argc, char* argv[])
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_HandleTypeDef TimHandle;
TIM_OC_InitTypeDef PWMConfig;
TIM_BreakDeadTimeConfigTypeDef DeadConfig;
__GPIOA_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
GPIO_InitStructure.Pin = GPIO_PIN_7;
GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
GPIO_InitStructure.Pull = GPIO_PULLUP;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.Pin = GPIO_PIN_9;
HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
__TIM1_CLK_ENABLE();
uint16_t uwPrescalerValue =0;
TimHandle.Instance = TIM1;
TimHandle.Init.Period = 1680 - 1;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK)
{
//Error_Handler();
}
PWMConfig.Pulse = 840;
PWMConfig.OCMode = TIM_OCMODE_PWM1;
PWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
PWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
PWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
PWMConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
PWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
if(HAL_TIM_PWM_ConfigChannel(&TimHandle,&PWMConfig,TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
DeadConfig.AutomaticOutput=TIM_AUTOMATICOUTPUT_ENABLE;
DeadConfig.BreakPolarity = TIM_BREAKPOLARITY_LOW;
DeadConfig.BreakState = TIM_BREAK_DISABLE;
DeadConfig.DeadTime = 0xFF;
DeadConfig.LockLevel = TIM_LOCKLEVEL_OFF;
DeadConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
DeadConfig.OffStateRunMode = TIM_OSSR_DISABLE;
if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle,&DeadConfig) != HAL_OK)
{
Error_Handler();
}
if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
if(HAL_TIMEx_PWMN_Start(&TimHandle,TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
// Add your code here.
while(1)
{
}
}
