用TIM1产生两路相位差为90°的PWM波出现的问题

只看该作者 · 2015-3-20 13:52

如题，我最近在写一个用TIM1产生两路相位差为90°的PWM波，思路由版主大大提供，链接：https://bbs.21ic.com/icview-188023-1-1.html
之前是用TIM3写的，成功了，但是把源程序改成TIM1就没有输出了，求大家帮帮我找找哪里出错了，我是新手，谢谢啦。
#include "bsp_pwm_output.h"

void TIM1_GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9;

  GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void TIM1_Mode_Config(u16 period)
{

u16 CCR1=period;
u16 CCR2=period>>1;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
  /* Time base configuration */
      TIM_TimeBaseStructure.TIM_Period = period;
      TIM_TimeBaseStructure.TIM_Prescaler = 0;
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0000;
      TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

      /* Toggle Mode configuration: Channel1 */
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
      TIM_OCInitStructure.TIM_Pulse = CCR1;
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
      TIM_OC1Init(TIM1, &TIM_OCInitStructure);
      TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

  /* Toggle Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
      TIM_OCInitStructure.TIM_Pulse = CCR2;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
      TIM_OC2Init(TIM1, &TIM_OCInitStructure);
      TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
      TIM_ARRPreloadConfig(TIM1, ENABLE);

  /* TIM3 enable counter */
      TIM_Cmd(TIM1, ENABLE);
}

主函数：
int main(void)
{

TIM1_GPIO_Config();

TIM1_Mode_Config(0xffff);

while (1)
{

}
}