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这是一路的,但是三路的这里要怎么写,鼓捣一晚上了,可以帮忙解答一下吗
#include "timer.h"
#include "led.h"
#include "usart.h"
//ͨÓö¨Ê±Æ÷Öжϳõʼ»¯
//ÕâÀïʱÖÓÑ¡ÔñΪAPB1µÄ2±¶£¬¶øAPB1Ϊ36M
//arr£º×Ô¶¯ÖØ×°Öµ¡£
//psc£ºÊ±ÖÓÔ¤·ÖƵÊý
//ÕâÀïʹÓõÄÊǶ¨Ê±Æ÷3!
//¶¨Ê±Æ÷5ͨµÀ1ÊäÈë²¶»ñÅäÖÃ
TIM_ICInitTypeDef TIM5_ICInitStructure;
void TIM5_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); //ʹÄÜTIM5ʱÖÓ
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //ʹÄÜGPIOAʱÖÓ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //PA0 Çå³ý֮ǰÉèÖÃ
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0 ÊäÈë
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_0); //PA0 ÏÂÀ­
//³õʼ»¯¶¨Ê±Æ÷5 TIM5
TIM_TimeBaseStructure.TIM_Period = arr; //É趨¼ÆÊýÆ÷×Ô¶¯ÖØ×°Öµ
TIM_TimeBaseStructure.TIM_Prescaler =psc; //Ô¤·ÖƵÆ÷
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //ÉèÖÃʱÖÓ·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIMÏòÉϼÆÊýģʽ
TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure); //¸ù¾ÝTIM_TimeBaseInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯TIMxµÄʱ¼ä»ùÊýµ¥Î»
//³õʼ»¯TIM5ÊäÈë²¶»ñ²ÎÊý
TIM5_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 Ñ¡ÔñÊäÈë¶Ë IC1Ó³Éäµ½TI1ÉÏ
TIM5_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //ÉÏÉýÑØ²¶»ñ
TIM5_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //Ó³Éäµ½TI1ÉÏ
TIM5_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //ÅäÖÃÊäÈë·ÖƵ,²»·ÖƵ
TIM5_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ÅäÖÃÊäÈëÂ˲¨Æ÷ ²»Â˲¨
TIM_ICInit(TIM5, &TIM5_ICInitStructure);
//ÖжϷÖ×é³õʼ»¯
NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn; //
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //ÏÈÕ¼ÓÅÏȼ¶2¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //´ÓÓÅÏȼ¶0¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀ±»Ê¹ÄÜ
NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝNVIC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèNVIC¼Ä´æÆ÷
TIM_ITConfig(TIM5,TIM_IT_Update|TIM_IT_CC1,ENABLE);//ÔÊÐí¸üÐÂÖÐ¶Ï ,ÔÊÐíCC1IE²¶»ñÖжÏ
TIM_Cmd(TIM5,ENABLE ); //ʹÄܶ¨Ê±Æ÷5
}
u8 TIM5CH1_CAPTURE_STA=0; //ÊäÈë²¶»ñ״̬
u16 TIM5CH1_CAPTURE_VAL; //ÊäÈë²¶»ñÖµ
//¶¨Ê±Æ÷5ÖжϷþÎñ³ÌÐò
void TIM5_IRQHandler(void)
{
if((TIM5CH1_CAPTURE_STA&0X80)==0)//»¹Î´³É¹¦²¶»ñ
{
if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)
{
if(TIM5CH1_CAPTURE_STA&0X40)//ÒѾ­²¶»ñµ½¸ßµçƽÁË
{
if((TIM5CH1_CAPTURE_STA&0X3F)==0X3F)//¸ßµçƽ̫³¤ÁË
{
TIM5CH1_CAPTURE_STA|=0X80;//±ê¼Ç³É¹¦²¶»ñÁËÒ»´Î
TIM5CH1_CAPTURE_VAL=0XFFFF;
}else TIM5CH1_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM5, TIM_IT_CC1) != RESET)//²¶»ñ1·¢Éú²¶»ñʼþ
{
if(TIM5CH1_CAPTURE_STA&0X40) //²¶»ñµ½Ò»¸öϽµÑØ
{
TIM5CH1_CAPTURE_STA|=0X80; //±ê¼Ç³É¹¦²¶»ñµ½Ò»´ÎÉÏÉýÑØ
TIM5CH1_CAPTURE_VAL=TIM_GetCapture1(TIM5);
TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Rising); //CC1P=0 ÉèÖÃΪÉÏÉýÑØ²¶»ñ
}else //»¹Î´¿ªÊ¼,µÚÒ»´Î²¶»ñÉÏÉýÑØ
{
TIM5CH1_CAPTURE_STA=0; //Çå¿Õ
TIM5CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM5,0);
TIM5CH1_CAPTURE_STA|=0X40; //±ê¼Ç²¶»ñµ½ÁËÉÏÉýÑØ
TIM_OC1PolarityConfig(TIM5,TIM_ICPolarity_Falling); //CC1P=1 ÉèÖÃΪϽµÑز¶»ñ
}
}
}
TIM_ClearITPendingBit(TIM5, TIM_IT_CC1|TIM_IT_Update); //Çå³ýÖжϱê־λ
}
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