STM32 TIM重映射

复用功能	没有重映射	部分重映射	完全重映射
TIM3_CH1	PA6	PB4	PC6
CH2	PA7	PB5	PC7
CH3	PB0	PB0	PC8
CH4	PB1	PB1	PC9

/**重映射 tim3 使得PC7 PC8输出Pwm波    

  ******************************************************************************

  * @file    Project/Template/main.c

  * @author  MCD Application Team

  * @version V3.0.0

  * @date    04/06/2009

  * @brief   Main program body

  ******************************************************************************

  * @copy

  *

  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS

  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE

  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY

  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING

  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE

  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.

  *

  * <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2>

  */

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x.h"

#include "stm32f10x_tim.h"

#include "misc.h"

void GPIO_AFIODeInit(void);//这个函数不能落下，否则不能成功

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;//配置PWM需要使用的结构体声名

TIM_OCInitTypeDef          TIM_OCInitStructure;

u16 CCR3_Val =250;

u16 CCR4_Val =250;

               

void GPIO_Config(void);

void Timer_Config(void);

/**

  * @brief  Delay program.

  * @param  None

  * @retval : None

  */

void  Delay (u32 nCount)

{

  for(; nCount != 0; nCount--);

}

/**

  * @brief  Main program.

  * @param  None

  * @retval : None

  */

int main(void)

{

/* Setup STM32 system (clock, PLL and Flash configuration) */

SystemInit();

GPIO_Config();

Timer_Config();

/* Infinite loop */

while (1) {

               }

}

/**

  * @brief  GPIO_Config program.

  * @param  None

  * @retval : None

  */

void GPIO_Config(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |            RCC_APB2Periph_GPIOC |RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE);



   GPIO_AFIODeInit();  //刚开始没有这个语句，所以一直没有重映射成功

   GPIO_PinRemapConfig(GPIO_FullRemap_TIM3 , ENABLE); //这个就是重映射功能函数

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

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0 | GPIO_Pin_1;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //这里也要注意

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  

  GPIO_Init(GPIOB, &GPIO_InitStructure); //这四句是为了校验究竟PB0，PB1是否还有PWM输出  

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  

  GPIO_Init(GPIOC, &GPIO_InitStructure);

  

  

}

void Timer_Config(void)

{

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);



  TIM_DeInit(TIM3);

  TIM_TimeBaseStructure.TIM_Period = 999;  //在下一个更新事件装入活动的自动重装载寄存器周期的值

  TIM_TimeBaseStructure.TIM_Prescaler = 0; //  设置了用来作为 TIMx 时钟频率除数的预分频值

  TIM_TimeBaseStructure.TIM_ClockDivision = 0;   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  

  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel3 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;  //TIM_OCMode

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;      //设置了待装入捕获比较寄存器的值

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //TIM_OCPolarity :TIM 输出比较极性高

  TIM_OC3Init(TIM3, &TIM_OCInitStructure);

  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能或者失能 TIM3 在 CCR3 上的预装载寄存器

  /* PWM1 Mode configuration: Channel4 */

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;  

  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;

  TIM_OC4Init(TIM3, &TIM_OCInitStructure);

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

  /* TIM3 enable counter */

  TIM_Cmd(TIM3, ENABLE);          //开启时钟，别落下

}

/**

  * @brief  EXTI_Config Program.

  * @param  None

  * @retval : None

  */



/**

  * @brief  Configures the nested vectored interrupt controller.

  * @param  None

  * @retval : None

  */



#ifdef  USE_FULL_ASSERT

/**

  * @brief  Reports the name of the source file and the source line number

  *   where the assert_param error has occurred.

  * @param file: pointer to the source file name

  * @param line: assert_param error line source number

  * @retval : None

  */

void assert_failed(uint8_t* file, uint32_t line)

{

  /* User can add his own implementation to report the file name and line number,

     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */

  while (1)

  {

  }

}

#endif

/**

  * @}

  */



/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/