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pwm output timer1

Question asked by armoun.mohamad on Jul 6, 2014
Latest reply on Aug 22, 2014 by Clive One
hi guys, i create a program to generate pwm signals in stm32f407 i did it in past for another timer but when i wanna do it for timer1 i doesn.t work.

here is my code :

#include <stm32f4xx.h>
 
 
void InitializeTimer1(int period = 1000)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
   
  TIM_TimeBaseInitTypeDef timerInitStructure;
    timerInitStructure.TIM_Prescaler = 1000;
    timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    timerInitStructure.TIM_Period = period;
    timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    timerInitStructure.TIM_RepetitionCounter = 0;
     
     
    TIM_TimeBaseInit(TIM1, &timerInitStructure);
 
    TIM_Cmd(TIM1, ENABLE);
}
 
void initializeGPIO()
{
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
    GPIO_InitTypeDef gpioStructure;
    gpioStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_11 | GPIO_Pin_13 |GPIO_Pin_14;
    gpioStructure.GPIO_Mode = GPIO_Mode_AF;
    gpioStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOE, &gpioStructure);
}
 
void InitializePWMChannel1()
{
    TIM_OCInitTypeDef outputChannelInit = {0,};
    outputChannelInit.TIM_OCMode = TIM_OCMode_PWM1;
    outputChannelInit.TIM_Pulse = 300;
    outputChannelInit.TIM_OutputState = TIM_OutputState_Enable;
    outputChannelInit.TIM_OCPolarity = TIM_OCPolarity_High;
 
    TIM_OC2Init(TIM1, &outputChannelInit);
    TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
    GPIO_PinAFConfig(GPIOE, GPIO_PinSource11, GPIO_AF_TIM1);
}
int main()
{
    InitializeTimer1();
    initializeGPIO();
    InitializePWMChannel1();
    for(;;)
    {}
     
}
 can any body help me , what's wrong with my code ?? any help appreciate

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