Posted on August 22, 2015 at 13:26
Hello,
I have a problem with my initalisiation code for an STM32F205RB Microcontroller.
I want to use four PWM Output Channels on the TIM1, but only the Channel 4 work properly. The other channels do not seem to be properly connected.
E.g the channel 3 is switching but only with an peak-to-peak of 0.3 V. I think the PA10 is not set as Pull-Push, more like an high impendance state.
When I set the Pins PA8 to PA11 as an GPIO then they work correctly.
I use the STM32CubeF2 and the Microcontroller work with 3.3 V and 100 MHz.
I hope anyone can help me or can reproduce that behavior.
#include ''stm32f2xx_hal.h''
TIM_HandleTypeDef htim1;
uint32_t foo=0;
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 4;
RCC_OscInitStruct.PLL.PLLN = 200;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 4;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3);
__GPIOC_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
}
int main()
{
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
TIM_OC_InitTypeDef sConfigOC;
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0;
htim1.Init.CounterMode = TIM_COUNTERMODE_CENTERALIGNED1;
htim1.Init.Period = 4000;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2;
htim1.Init.RepetitionCounter = 0;
HAL_TIM_PWM_Init(&htim1);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 2000;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2);
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_3);
HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4);
HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_3);
HAL_TIM_PWM_Start(&htim1,TIM_CHANNEL_4);
while(1)
{
foo++;
}
}
void SysTick_Handler()
{
}
void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* htim_base)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(htim_base->Instance==TIM1)
{
/* Peripheral clock enable */
__TIM1_CLK_ENABLE();
/**TIM1 GPIO Configuration
PA8 ------> TIM1_CH1
PA9 ------> TIM1_CH2
PA10 ------> TIM1_CH3
PA11 ------> TIM1_CH4
*/
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
}
#stm32f205-tim1
