求大神解决STM32f103想用TIM1输出PWM

qzq1222

求大神解决STM32f103想用TIM1输出PWM




程序写。。。




#include "stm32f10x_tim.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
void TIM_INIT(void)
{

  GPIO_InitTypeDef  GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef  TIM_OCInitStructure;
  TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOE|
            RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|
                 GPIO_Pin_8|GPIO_Pin_10|GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOE, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOE, &GPIO_InitStructure);
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 ;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB, &GPIO_InitStructure);  

  //  TimerPeriod = (SystemCoreClock / 17570 ) - 1;
  //   Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
  //   Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
  //   Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
  //   Channel4Pulse = (uint16_t) (((uint32_t) 125 * (TimerPeriod- 1)) / 1000);
  //
  TIM_TimeBaseStructure.TIM_Period = 1000-1;
  TIM_TimeBaseStructure.TIM_Prescaler = 72-1;  
  TIM_TimeBaseStructure.TIM_ClockDivision =TIM_CKD_DIV1;   
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;   
  TIM_OCInitStructure.TIM_Pulse = 500;  
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;  
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
  TIM_OC1Init(TIM1,&TIM_OCInitStructure);  
//   TIM_OC1Init(TIM1, &TIM_OCInitStructure);
//   TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;
//   TIM_OC2Init(TIM1, &TIM_OCInitStructure);
//   TIM_OCInitStructure.TIM_Pulse = Channel3Pulse;
//   TIM_OC3Init(TIM1, &TIM_OCInitStructure);
//   TIM_OCInitStructure.TIM_Pulse = Channel4Pulse;
//   TIM_OC4Init(TIM1, &TIM_OCInitStructure);



  TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Disable;
  TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
  TIM_BDTRInitStructure.TIM_DeadTime = 0x90;
  TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
  TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
  TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
  TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
  TIM_Cmd(TIM1, ENABLE);
  TIM_CtrlPWMOutputs(TIM1, ENABLE);
  TIM_OC1PreloadConfig(TIM1,
  TIM_OCPreload_Enable);  //
  TIM_ARRPreloadConfig(TIM1, ENABLE);  
  TIM_Cmd(TIM1,ENABLE);  
  TIM_CtrlPWMOutputs(TIM1, ENABLE);  


没反应，，，求大神帮解决

flyleaf

参考我们的定时器例程，都写好了

qzq1222

flyleaf 发表于 2015-6-17 09:13
参考我们的定时器例程，都写好了

我也是，但是不能输出波形