TIM1 产生pwm的问题

张少煌

/**
  ******************************************************************************
  * @file    main.c
  * @author  fire
  * @version V1.0
  * @date    2013-xx-xx
  * @brief   2aêÔtim1Ëĸöí¨μàêä3ö2»í¬Õ¼¿Õ±èμÄpwm2¨(PA8.PA9.PA10--2￠μ÷êÔ3ö»￥212¨DÎ)
  ******************************************************************************
  * @attention
  *
  * êμÑéƽì¨:ò°»e iSO STM32 ¿a·￠°å
  * ÂÛì3    :http://www.firebbs.cn
  * ìÔ±|    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */  
#include "stm32f10x.h"
#include "bsp_pwm_output.h"

/**
  * @brief  Ö÷oˉêy
  * @param  ÎT  
  * @retval ÎT
  */
int main(void)
{       
       
       
        //TIM3_PWM_Init();
        //TIM1_PWM_Init();
        TIM1_PWM_Init();
        while (1)
        {


        }
}
/*********************************************END OF FILE**********************/


/*以上是main函数*/
/*下面是bsp_pwm_output.c文件*/

/**
  ******************************************************************************
  * @file    bsp_pwm_output.c
  * @author  STMicroelectronics
  * @version V1.0
  * @date    2013-xx-xx
  * @brief   tim3êä3öËÄ·pwm bsp
  ******************************************************************************
  * @attention
  *
  * êμÑéƽì¨:ò°»e iSO STM32 ¿a·￠°å
  * ÂÛì3    :http://www.firebbs.cn
  * ìÔ±|    :http://firestm32.taobao.com
  *
  ******************************************************************************
  */

#include "bsp_pwm_output.h"



static void TIM1_GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;




        RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);


  /* GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);


  /*GPIOA Configuration: TIM3 channel 1 and 2 as alternate function push-pull */

        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;               
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);


  /*GPIOB Configuration: TIM3 channel 3 and 4 as alternate function push-pull */

        GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15 ;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;                 
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}




static void TIM1_Mode_Config(void)
{
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;


       
        u16 CCR1_Val = 500;        
        u16 CCR2_Val = 375;
        u16 CCR3_Val = 250;



/* -----------------------------------------------------------------------
    TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR+1)* 100% = 50%
    TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR+1)* 100% = 37.5%
    TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR+1)* 100% = 25%
    TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR+1)* 100% = 12.5%
  ----------------------------------------------------------------------- */


  /* Time base configuration */                 
  TIM_TimeBaseStructure.TIM_Period = 999;     
  TIM_TimeBaseStructure.TIM_Prescaler = 0;          
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;       
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

        TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);


  /* PWM1 Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;          
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;       
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;         
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

        TIM_OC1Init(TIM1, &TIM_OCInitStructure);       
  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
       




  /* PWM1 Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val;       

        TIM_OC2Init(TIM1, &TIM_OCInitStructure);       
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);


  /* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;       
  TIM_OC3Init(TIM1, &TIM_OCInitStructure);         
  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);




  TIM_ARRPreloadConfig(TIM1, ENABLE);                       
         



  TIM_Cmd(TIM1, ENABLE);                  
         //TIM_Cmd(TIM3, ENABLE);                          
}




  void TIM1_PWM_Init(void)
{
        //TIM3_GPIO_Config();
        //TIM3_Mode_Config();       
        TIM1_GPIO_Config();
        TIM1_Mode_Config();
}


/*********************************************END OF FILE**********************/



以上代码是根据火哥的例子改的的，编译时，提示TIM3_PWM_Init()没有定义。这是怎么回事。在线等。请求帮忙

张少煌

..\..\User\main.c(31): warning:  #223-D: function "TIM1_PWM_Init" declared implicitly

张少煌

有人在吗？请帮帮忙

张少煌

我找到原因了，在.h文件里也要声明。只是修改完了。发现没有输出波形

张少煌

还是没人帮忙