main.c

STM32 的定时器控制实例程序！ 可以直接使用

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : main.c
* Author             : MCD Application Team
* Version            : V1.0
* Date               : 10/08/2007
* Description        : TIM Example 3 Main program body
********************************************************************************
* 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 ---------------------------------------------------------*/ 
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
u16 CCR1_Val = 1000;
u16 CCR2_Val = 500;
u16 CCR3_Val = 250;
u16 CCR4_Val = 125; 
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();

/* ---------------------------------------------------------------
  TIM2 Configuration: Output Compare Inactive Mode:
  TIM2CLK = 36 MHz, Prescaler = 35999, TIM2 counter clock = 1 KHz
  TIM2_CH1 delay = CCR1_Val/TIM2 counter clock  = 1000 ms
  TIM2_CH2 delay = CCR2_Val/TIM2 counter clock  = 500 ms 
  TIM2_CH3 delay = CCR3_Val/TIM2 counter clock  = 250 ms 
  TIM2_CH4 delay = CCR4_Val/TIM2 counter clock  = 125 ms
--------------------------------------------------------------- */


  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 65535;          
  TIM_TimeBaseStructure.TIM_Prescaler = 0;       
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;    
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 
  
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* Prescaler configuration */
  TIM_PrescalerConfig(TIM2, 35999, TIM_PSCReloadMode_Immediate);

  /* Output Compare Active Mode configuration: Channel1 */
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;          
  TIM_OCInitStructure.TIM_Channel = TIM_Channel_1;          
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;  
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    
  TIM_OCInit(TIM2, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);

  /* Output Compare Active Mode configuration: Channel2 */
  TIM_OCInitStructure.TIM_Channel = TIM_Channel_2;          
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val;  
  
  TIM_OCInit(TIM2, &TIM_OCInitStructure); 

  TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);

  /* Output Compare Active Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_Channel = TIM_Channel_3;          
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;  
  
  TIM_OCInit(TIM2, &TIM_OCInitStructure);

  TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);

  /* Output Compare Active Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_Channel = TIM_Channel_4;          
  TIM_OCInitStructure.TIM_Pulse = CCR4_Val;  
  
  TIM_OCInit(TIM2, &TIM_OCInitStructure);
  
  TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);
  
  TIM_ARRPreloadConfig(TIM2, ENABLE);

  /* TIM IT enable */
  TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);

  /* Set PC.06, PC.07, PC.08 and PC.09 pins */  // STM3210B-LK1,  set PC.04 - PC.07
  GPIO_SetBits(GPIOC, GPIO_Pin_4 |GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);

  /* TIM2 enable counter */
  TIM_Cmd(TIM2, 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)
  {
    /* Enable Prefetch Buffer */
    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);
 
    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1); 
  
    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1); 

    /* PCLK1 = HCLK/4 */
    RCC_PCLK1Config(RCC_HCLK_Div4);

    /* 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)
    {
    }
  }

  /* TIM2 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  /* GPIOC clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
}

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

 /* GPIOC Configuration: Pin6, 7, 8 and 9 in Output */
  // For STM3210B-LK1, configure PC4,5,6,7 instead
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 |GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/*******************************************************************************
* Function Name  : NVIC_Configuration
* Description    : Configure the nested vectored interrupt controller.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;  

#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
 
  /* Enable the TIM2 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure); 

}

#ifdef  DEBUG
/*******************************************************************************
* Function Name  : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert_param error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert_param 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****/