请教版主我用KEIL仿真TIM1PWM输出问题

GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);//(改变定时器引脚的映射)

沙发 transhuman

上图是未进行改变定时器引脚的映射改变之后 PE各引脚无输出的

点赞 2010-10-10 13:10

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name       : main.c
* Author          : MCD Application Team
* Date First Issued  : 05/21/2007
* Description       : Main program body
********************************************************************************
* History:
* 05/21/2007: V0.3
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_lib.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM1_TimeBaseInitTypeDef  TIM1_TimeBaseStructure;
TIM1_OCInitTypeDef  TIM1_OCInitStructure;
TIM1_BDTRInitTypeDef TIM1_BDTRInitStructure;
u16 CCR1_Val = 0x7FF;
u16 CCR2_Val = 0x5FF;
u16 CCR3_Val = 0x3FF;
u16 CCR4_Val = 0x1FF;
ErrorStatus HSEStartUpStatus;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);

/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name  : main
* Description : Main program
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
int main(void)
{
#ifdef DEBUG
  debug();
#endif
  /* System Clocks Configuration */
  RCC_Configuration();
  /* NVIC configuration */
  NVIC_Configuration();
  /* GPIO Configuration */
  GPIO_Configuration();
  /* TIM1 Configuration ---------------------------------------------------
Generates 7 PWM signals with 4 different duty cycles:
TIM1CLK = 72 MHz, Prescaler = 0x0, TIM1 counter clock = 72 MHz
TIM1 frequency = TIM1CLK/(TIM1_Period + 1) = 17.57 KHz
  - TIM1 Channel1 & Channel1N duty cycle = TIM1->CCR1 / (TIM1_Period + 1) = 50%
  - TIM1 Channel2 & Channel2N duty cycle = TIM1->CCR2 / (TIM1_Period + 1) = 37.5%
  - TIM1 Channel3 & Channel3N duty cycle = TIM1->CCR3 / (TIM1_Period + 1) = 25%
  - TIM1 Channel4 duty cycle = TIM1->CCR4 / (TIM1_Period + 1) = 12.5%
  ----------------------------------------------------------------------- */
  /* TIM1 Peripheral Configuration */
  TIM1_DeInit();
  /* Time Base configuration */
  TIM1_TimeBaseStructure.TIM1_Prescaler = 0x0;
  TIM1_TimeBaseStructure.TIM1_CounterMode = TIM1_CounterMode_Up;
  TIM1_TimeBaseStructure.TIM1_Period = 0xFFF;
  TIM1_TimeBaseStructure.TIM1_ClockDivision = 0x0;
  TIM1_TimeBaseStructure.TIM1_RepetitionCounter = 0x0;
  TIM1_TimeBaseInit(&TIM1_TimeBaseStructure);
  /* Channel 1, 2,3 and 4 Configuration in PWM mode */
  TIM1_OCInitStructure.TIM1_OCMode = TIM1_OCMode_PWM2;
  TIM1_OCInitStructure.TIM1_OutputState = TIM1_OutputState_Enable;
  TIM1_OCInitStructure.TIM1_OutputNState = TIM1_OutputNState_Enable;
  TIM1_OCInitStructure.TIM1_Pulse = CCR1_Val;
  TIM1_OCInitStructure.TIM1_OCPolarity = TIM1_OCPolarity_Low;
  TIM1_OCInitStructure.TIM1_OCNPolarity = TIM1_OCNPolarity_High;
  TIM1_OCInitStructure.TIM1_OCIdleState = TIM1_OCIdleState_Set;
  TIM1_OCInitStructure.TIM1_OCNIdleState = TIM1_OCIdleState_Reset;

  TIM1_OC1Init(&TIM1_OCInitStructure);
  TIM1_OCInitStructure.TIM1_Pulse = CCR2_Val;
  TIM1_OC2Init(&TIM1_OCInitStructure);
  TIM1_OCInitStructure.TIM1_Pulse = CCR3_Val;
  TIM1_OC3Init(&TIM1_OCInitStructure);
  TIM1_OCInitStructure.TIM1_Pulse = CCR4_Val;
  TIM1_OC4Init(&TIM1_OCInitStructure);
  /* TIM1 counter enable */
  TIM1_Cmd(ENABLE);
  /* TIM1 Main Output Enable */
  TIM1_CtrlPWMOutputs(ENABLE);

  while(1)
  {
  }
}
/*******************************************************************************
* Function Name  : RCC_Configuration
* Description : Configures the different system clocks.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void RCC_Configuration(void)
{
  /* RCC system reset(for debug purpose) */
  RCC_DeInit();
  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);
  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();
  if(HSEStartUpStatus == SUCCESS)
  {
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08)
{
}
  }

}
/*******************************************************************************
* Function Name  : GPIO_Configuration
* Description : Configure the TIM1 Pins.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  /* TIM1, GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1  | RCC_APB2Periph_GPIOA |
                     RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOE |
   RCC_APB2Periph_AFIO , ENABLE);
  GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);//(改变定时器引脚的映射)
/* GPIOE Configuration: Channel 1, 1N, 2, 2N, 3 and 3N Output */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //推挽输出备用功能
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    //PWM输出IO驱动时钟
  GPIO_Init(GPIOE, &GPIO_InitStructure);
  /* Lock GPIOE Pin9 to Pin 13 */
  GPIO_PinLockConfig(GPIOE, GPIO_Pin_9 | GPIO_Pin_11 | GPIO_Pin_13);//锁定GPIO 引脚配置寄存器

  /* GPIOA Configuration: Channel 1, 2, 3 and 4 Output */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9| GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  /* GPIOB Configuration: Channel 1N, 2N and 3N Output */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description : Configures Vector Table base location.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef  VECT_TAB_RAM
  /* Set the Vector Table base location at 0x20000000 */
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}
#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description : Reports the name of the source file and the source line number
*                where the assert error has occurred.
* Input       : - file: pointer to the source file name
*                - line: assert error line source number
* Output       : None
* Return       : None
*******************************************************************************/
void assert_failed(u8* file, u32 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) */
  while(1)
  {
  }
}
#endif
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/

点赞 2010-10-10 13:14