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	积分174金钱174 注册时间2014-3-5在线时间0 小时 | 
 
 发表于 2014-4-4 16:59:22
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 #include "stm32f10x.h"
 #include "platform_config.h"
 
 TIM_OCInitTypeDef  TIM_OCInitStructure;
 /* 
  rivate function prototypes -----------------------------------------------*/ void RCC_Configuration(void);
 void GPIO_Configuration(void);
 void Delay(__IO uint32_t nCount);
 void TIM1_Configuration(void);
 void TIM2_Configuration(void);
 void Tim4_confi(void);
 u16 Count_pulse(u16 c);
 u16 counter=0;
 u16 COUN1=0;
 u16 COUN2=0;
 /* 
  rivate functions ---------------------------------------------------------*/ 
 /**
 * @brief  Main program.
 * @param  None
 * @retval: None
 */
 int main(void)
 {
 u8 i=0;
 RCC_Configuration();
 GPIO_Configuration();
 TIM1_Configuration();
 TIM2_Configuration();
 //  Tim4_confi();	   //
 while (1)
 {
 Delay(10000);
 COUN1=TIM1->CNT;
 COUN2=TIM2->CNT;
 }
 }
 
 void Delay(__IO uint32_t nCount)   //0.1us
 {
 for(; nCount != 0; nCount--);
 }
 
 void RCC_Configuration(void)
 {
 RCC_ClocksTypeDef RCC_ClockFreq;
 SystemInit();
 RCC_GetClocksFreq(&RCC_ClockFreq);
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);	  //使能PD端口时钟
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);	  //使能定时器TIM4时钟
 GPIO_PinRemapConfig (GPIO_Remap_TIM4,ENABLE );	          //重映射
 }
 
 
 void GPIO_Configuration(void)
 {
 GPIO_InitTypeDef GPIO_InitStructure;
 
 /* 
  A0,PA12-> 左右脉冲输入 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_12;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //50M时钟速度
 GPIO_Init(GPIOA, &GPIO_InitStructure);
 
 
 GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13 ;
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
 GPIO_Init(GPIOD, &GPIO_InitStructure);
 
 }
 void TIM1_Configuration(void) //只用一个外部脉冲端口
 {
 TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;
 
 
 //配置TIMER1作为计数器
 TIM_DeInit(TIM1);
 
 TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
 TIM_TimeBaseStructure.TIM_Prescaler = 0x00;//设置预分频可以将外部信号分频
 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); // Time base configuration
 
 TIM_ITRxExternalClockConfig(TIM2,TIM_TS_ETRF); //我测试中一直不能用的原因是缺少这句话,缺少后,timer的驱动时钟源默认是RCC,需要更改为外部ETR输入才行。
 TIM_ETRClockMode2Config(TIM1, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0);
 
 TIM_SetCounter(TIM1, 0);
 TIM_Cmd(TIM1, ENABLE);
 }
 void TIM2_Configuration(void) //只用一个外部脉冲端口
 {
 TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;
 
 //配置TIMER2作为计数器
 TIM_DeInit(TIM2);
 
 TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
 TIM_TimeBaseStructure.TIM_Prescaler = 0x00;
 TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); // Time base configuration
 
 TIM_ETRClockMode2Config(TIM2, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0);
 
 TIM_SetCounter(TIM2, 0);
 TIM_Cmd(TIM2, ENABLE);
 }
 void Tim4_confi(void)	  //TIM4初始化
 {
 // TIM4-CH2基本计数器设置(设置PWM频率)
 // 频率=TIM1_CLK/(ARR+1)
 TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
 TIM_DeInit( TIM4 ) ;
 TIM_BaseInitStructure.TIM_Period = 100;		//100us
 TIM_BaseInitStructure.TIM_Prescaler = 72-1;
 TIM_BaseInitStructure.TIM_ClockDivision = 0;
 TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
 TIM_BaseInitStructure.TIM_RepetitionCounter = 0;
 TIM_TimeBaseInit(TIM4, &TIM_BaseInitStructure);
 //启用ARR的影子寄存器(直到产生更新事件才更改设置)
 TIM_ARRPreloadConfig(TIM4, ENABLE);
 //TIM4_OC2模块设置
 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
 TIM_OCInitStructure.TIM_Pulse = 50;
 TIM_OC2Init(TIM4, &TIM_OCInitStructure);
 TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
 //TIM4开启
 TIM_Cmd(TIM4, ENABLE);
 //TIM4_OC通道输出PWM(一定要加)
 TIM_CtrlPWMOutputs(TIM4, ENABLE);
 
 }
 #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
 
 这是我的程序,pa0接的10k脉冲,计数器值为0
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