想要利用ch32v307的輸入捕獲來獲取3個通道中接收到上升沿信號時，定時器的計數(shù)值，可是每次上電后，發(fā)現(xiàn)立馬就進入輸入捕獲中斷，導(dǎo)致出錯，是哪里的問題，代碼是在例程的基礎(chǔ)上進行修改的
main代碼如下
/********************************** (C) COPYRIGHT *******************************
* File Name? ? ? ? ? : main.c
* Author? ? ? ? ? ? ?: WCH
* Version? ? ? ? ? ? : V1.0.0
* Date? ? ? ? ? ? ? ?: 2021/06/06
* Description? ? ? ? : Main program body.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for?
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/
/*
?*@Note
Input capture routine:
?TIM1_CH1(PA8)
?This example demonstrates the TIM_CH1(PA8) pin floating input, which detects an edge
? transition to trigger a TIM1 capture interrupt,
?The rising edge triggers the TIM_IT_CC1 interrupt, and the falling edge triggers the
? TIM_IT_CC2 interrupt.
?
*/
#include "debug.h"
#include "math.h"
#define x1 0
#define y1 75
#define x2 0
#define y2 0
#define x3 100
#define y3 0
u32 mic1=0;
u32 mic2=0;
u32 mic3=0;
u16 time=0;
u16 state1=0;
u16 state2=0;
u16 state3=0;
u16 i=0;
u16 x;
u16 y;
u32 t12;
u32 t13;
u32 t23;
/*********************************************************************
?* @fn? ? ? Input_Capture_Init
?*
?* @brief? ?Initializes TIM1 input capture.
?*
?* @param? ?arr - the period value.
?*? ? ? ? ? psc - the prescaler value.
?*? ? ? ? ? ccp - the pulse value.
?*
?* @return? none
?*/
void cal(void);
void Input_Capture_Init( u16 arr, u16 psc )
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_ICInitTypeDef TIM_ICInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
NVIC_InitTypeDef NVIC_InitStructure={0};
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init( GPIOA, &GPIO_InitStructure);
GPIO_ResetBits( GPIOA, GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 );
TIM_TimeBaseInitStructure.TIM_Period = arr;
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_RepetitionCounter =? 0x00;
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure);
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1 | TIM_Channel_2 | TIM_Channel_3;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInit(TIM1, &TIM_ICInitStructure);
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
? ? NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;
? ? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
? ? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
? ? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
? ? NVIC_Init(&NVIC_InitStructure);
TIM_ITConfig( TIM1, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3, ENABLE );
TIM_SelectInputTrigger( TIM1, TIM_TS_TI1FP1 );
//TIM_SelectSlaveMode( TIM1, TIM_SlaveMode_Reset );
//TIM_SelectMasterSlaveMode( TIM1, TIM_MasterSlaveMode_Enable );
TIM_Cmd( TIM1, ENABLE );
}
void TIM1_CC_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void TIM1_UP_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void TIM1_UP_IRQHandler(void)
{
? ? TIM_SetCounter( TIM1, 0 );
? ? i++;
}
void TIM1_CC_IRQHandler(void)
{
? ? if( (TIM_GetITStatus( TIM1, TIM_IT_CC1 ) != RESET) && (state1==0))
? ? ? ? {
? ? ? ? ? ? state1=1;
? ? ? ? ? ? time++;
? ? ? ? ? ? mic1=(TIM_GetCounter(TIM1)+(i*65535));
? ? ? ? ? ? TIM_ClearITPendingBit( TIM1, TIM_IT_CC1 );
? ? ? ? ? ? //printf( "CH4_Val:%d\r\n", TIM_GetCapture1( TIM1 ));
? ? ? ? ? ? //printf("進入中斷1\r");
? ? ? ? ? ? printf("%d\r",mic1);
? ? ? ? ? ? if(time==3)
? ? ? ? ? ? ? ? {
? ? ? ? ? ? ? ? ? ? state1=0;state2=0;state3=0;
? ? ? ? ? ? ? ? ? ? cal();
? ? ? ? ? ? ? ? ? ? Delay_Ms(1000);
? ? ? ? ? ? ? ? ? ? TIM_SetCounter( TIM1, 0 );
? ? ? ? ? ? ? ? }
? ? ? ? }
? ? if( TIM_GetITStatus( TIM1, TIM_IT_CC2 ) != RESET && state2==0)
? ? ? ? {
? ? ? ? ? ? state2=1;
? ? ? ? ? ? time++;
? ? ? ? ? ? mic2=(TIM_GetCounter(TIM1)+(i*65535));
? ? ? ? ? ? TIM_ClearITPendingBit( TIM1, TIM_IT_CC2 );
? ? ? ? ? ? //printf( "CH4_Val:%d\r\n", TIM_GetCapture2( TIM1 ));
? ? ? ? ? ? //printf("進入中斷2\r");
? ? ? ? ? ? printf("%d\r",mic2);
? ? ? ? ? ? if(time==3)
? ? ? ? ? ? ? ? ? ? ? ? {
? ? ? ? ? ? ? ? ? ? ? ? ? ? state1=0;state2=0;state3=0;
? ? ? ? ? ? ? ? ? ? ? ? ? ? cal();
? ? ? ? ? ? ? ? ? ? ? ? ? ? Delay_Ms(1000);
? ? ? ? ? ? ? ? ? ? ? ? ? ? TIM_SetCounter( TIM1, 0 );
? ? ? ? ? ? ? ? ? ? ? ? }
? ? ? ? }
? ? if( TIM_GetITStatus( TIM1, TIM_IT_CC3 ) != RESET && state3==0)
? ? ? ? {
? ? ? ? ? ? state3=1;
? ? ? ? ? ? time++;
? ? ? ? ? ? mic2=(TIM_GetCounter(TIM1)+(i*65535));
? ? ? ? ? ? TIM_ClearITPendingBit( TIM1, TIM_IT_CC3 );
? ? ? ? ? ? //printf( "CH4_Val:%d\r\n", TIM_GetCapture3( TIM1 ));
? ? ? ? ? ? //printf("進入中斷3\r");
? ? ? ? ? ? //TIM_SetCounter( TIM1, 0 );
? ? ? ? ? ? printf("%d\r",mic3);
? ? ? ? ? ? if(time==3)
? ? ? ? ? ? ? ? ? ? ? ? {
? ? ? ? ? ? ? ? ? ? ? ? ? ? state1=0;state2=0;state3=0;
? ? ? ? ? ? ? ? ? ? ? ? ? ? cal();
? ? ? ? ? ? ? ? ? ? ? ? ? ? Delay_Ms(1000);
? ? ? ? ? ? ? ? ? ? ? ? ? ? TIM_SetCounter( TIM1, 0 );
? ? ? ? ? ? ? ? ? ? ? ? }
? ? ? ? }
}
/*********************************************************************
?* @fn? ? ? main
?*
?* @brief? ?Main program.
?*
?* @return? none
?*/
int main(void)
{
USART_Printf_Init(115200);
SystemCoreClockUpdate();
printf("SystemClk:%d\r\n",SystemCoreClock);
printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
? ? Input_Capture_Init( 0xFFFF, 144-1 );
while(1);
}
void cal()
{
? ? t12=mic1-mic2;
? ? t13=mic1-mic3;
? ? t23=mic2-mic3;
? ? printf("%d\r",t12);printf("%d\n",t13);printf("%d\n",t23);
? ? for(;x<=100;x++)
? ? {
? ? ? ? for(;y<=75;y++)
? ? ? ? {
? ? ? ? ? ? if((fabs((sqrtf(x*x+(y1-y)*(y1-y))-sqrtf(x*x+y*y))-t12*0.034)<5) && (fabs((sqrtf(x*x+(y1-y)*(y1-y))-sqrtf(y*y+(x3-x)*(x3-x)))-t13*0.034)<5) && (fabs((sqrtf(x*x+y*y)-sqrtf(y*y+(x3-x)*(x3-x)))-t23*0.034)<5))
? ? ? ? ? ? {
? ? ? ? ? ? ? ? printf("X=%d\r",x);printf("Y=%d\n",y);
? ? ? ? ? ? }
? ? ? ? }
? ? }
}
