基于STM32处理器定时器比较输出测试程序

基于STM32处理器定时器比较输出测试程序

• 这是建立keil的工程的信息

  

  这里给出最关键的三个文件
  main.c文件
  
  
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  01.#include "stm32f10x.h"

  02.#include "stm32f10x_tim.h"

  03.#include "misc.h"

  04.

  05.unsigned int CCR3_Val=5000;

  06.unsigned int CCR4_Val=10000;

  07.extern void time_ini(void);

  08.

  09.void RCC_Configuration(void)

  10.{

  11. SystemInit();

  12. RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);

  13. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC

  14. | RCC_APB2Periph_GPIOD| RCC_APB2Periph_GPIOE , ENABLE);

  15.}

  16.

  17.void NVIC_Configuration(void)

  18.{

  19. NVIC_InitTypeDef NVIC_InitStructure;

  20. NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

  21.

  22.

  23. NVIC_InitStructure.NVIC_IRQChannel =TIM3_IRQn ; //配置定时器中断

  24. NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  25. NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  26. NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  27. NVIC_Init(&NVIC_InitStructure);

  28.}

  29.

  30.int main(void)

  31.{

  32. RCC_Configuration(); //系统时钟设置及外设时钟使能

  33. NVIC_Configuration(); //中断源配置

  34. time_ini(); //定时器3的初始化

  35. while(1);

  36.}

  Tim.c文件
  
  

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  01.#include "stm32f10x_tim.h"

  02.#include "stm32f10x_gpio.h"

  03.#include <stm32f10x.h>

  04.

  05.

  06.void time_ini(void);

  07.extern unsigned int CCR3_Val;

  08.extern unsigned int CCR4_Val;

  09.

  10.

  11.TIM_TimeBaseInitTypeDef TIM3_TimeBaseStructure;

  12.TIM_OCInitTypeDef TIM3_OCInitStructure;

  13.TIM_BDTRInitTypeDef TIM3_BDTRInitStructure;

  14.

  15.

  16.

  17.

  18.

  19.void time_ini(void)

  20.{

  21. GPIO_InitTypeDef GPIO_InitStructure;

  22. RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //定时器3 时钟使能

  23.

  24. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //PB5复用为TIM3的通道2

  25. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

  26. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  27. GPIO_Init(GPIOB, &GPIO_InitStructure);

  28.

  29.

  30.

  31. GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3 , ENABLE);

  32.

  33.

  34. TIM3_TimeBaseStructure.TIM_Prescaler = 7200; //预分频器TIM3_PSC=63

  35. TIM3_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //计数器向上计数模式 TIM3_CR1[4]=0

  36. TIM3_TimeBaseStructure.TIM_Period =0xffff; //自动重装载寄存器TIM3_APR

  37. TIM3_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分频因子 TIM3_CR1[9:8]=00

  38. TIM_TimeBaseInit(TIM3,&TIM3_TimeBaseStructure); //写TIM3各寄存器参数

  39.

  40. TIM3_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle ; //TIM3_CCMR1[14:12]=011 翻转当TIM3_CCR2=TIM3_CNT时，翻转OC2REF的电平

  41. TIM3_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性 低电平有效 TIM3_CCER[5]=1;

  42.

  43.

  44. TIM3_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输入/捕获2输出允许 OC2信号输出到对应的输出引脚PB5

  45. TIM3_OCInitStructure.TIM_Pulse =CCR3_Val; //若CC1通道配置为输出：CCR2是装入当前捕获/比较2 TIM3_CCR2寄存器的值（预装载值）。

  46. TIM_OC3Init(TIM3, &TIM3_OCInitStructure);

  47. TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Disable);

  48.

  49.

  50. TIM3_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输入/捕获2输出允许 OC2信号输出到对应的输出引脚PB5

  51. TIM3_OCInitStructure.TIM_Pulse =CCR4_Val; //若CC1通道配置为输出：CCR2是装入当前捕获/比较2 TIM3_CCR2寄存器的值（预装载值）。 www.

  52. TIM_OC4Init(TIM3, &TIM3_OCInitStructure);

  53. TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Disable); //TIM3_CCMR1[1]=0 禁止TIM3_CCR2寄存器的预装载功能，可随时写入TIM3_CCR2

  54.

  55. TIM_Cmd(TIM3,ENABLE); //启动定时器3 TIM3_CR1[0]=1;

  56. TIM_ITConfig(TIM3,TIM_IT_CC3|TIM_IT_CC4,ENABLE); //TIM3_DIER[2]=1 允许捕获/比较2中断

  57.}

  stm32f10x_it.c文件
  
  

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  01.#include "stm32f10x.h"

  02.#include "stm32f10x_tim.h"

  03.unsigned int capture1=0;

  04.extern unsigned int CCR3_Val;

  05.extern unsigned int CCR4_Val;

  06.extern TIM_OCInitTypeDef TIM3_OCInitStructure;

  07.

  08.

  09.void TIM3_IRQHandler(void)

  10.{

  11. if (TIM_GetITStatus(TIM3, TIM_IT_CC3) != RESET) //判断状态寄存器 TIM3_SR[2] 是否发生了捕获/比较2 中断

  12. {

  13. TIM_ClearITPendingBit(TIM3, TIM_IT_CC3); //软件清除状态寄存器 TIM3_SR[2] 捕获/比较2 中断中断标志

  14. capture1 = TIM_GetCapture3(TIM3); //获取TIM3_CCR2的预装值

  15. TIM_SetCompare3(TIM3, capture1+ CCR3_Val); //和CCR2_Val累加后装入TIM3_CCR2 这是为了配合计数器值的递增。以在下一次作出比较。

  16. }

  17.

  18. if (TIM_GetITStatus(TIM3, TIM_IT_CC4) != RESET) //判断状态寄存器 TIM3_SR[2] 是否发生了捕获/比较2 中断

  19. {

  20. TIM_ClearITPendingBit(TIM3, TIM_IT_CC4); //软件清除状态寄存器 TIM3_SR[2] 捕获/比较2 中断中断标志

  21. capture1 = TIM_GetCapture4(TIM3); //获取TIM3_CCR2的预装值

  22. TIM_SetCompare4(TIM3, capture1+ CCR4_Val); //和CCR2_Val累加后装入TIM3_CCR2 这是为了配合计数器值的递增。以在下一次作出比较。

  23. }

  24.}