我研究正點原子的戰艦版的實驗10輸入捕獲實驗
我個人認為很難懂, 搞不懂為什麼這樣弄
我的比較簡單,我只是利用EXIT0 PA0 channel1的外部輸入中斷
而且我給10m的脈波,量測就是10000,給20m量測就是20000
很準的
#include "stm32f0xx.h"
#include "usart.h"
void Delay (uint32_t nCount);
void TIMER_Init(void);
void Delay(__IO uint32_t nTime);
void TimingDelay_Decrement(void);
void GPIO_Config(void);
void EXTI0_Config(void);
static __IO uint32_t TimingDelay;
extern uint32_t Hunk[2];
#define MESSAGE1 "*****Alarm Example"
#define MESSAGE2 " testing on"
#define MESSAGE3 "****** UART-1******"
extern uint8_t TIM5CH1_CAPTURE_STA; //懷眸鳳袨怓
extern uint16_t TIM5CH1_CAPTURE_VAL; //懷眸鳳硉
extern uint32_t count[2];
int main(void)
{
uint32_t COUNT=0;
uint32_t COUNT1=0;
uint32_t COUNT2=0;
SystemCoreClockUpdate();
if (SysTick_Config(SystemCoreClock /1000))
{
while (1);
}
EXTI0_Config();
USART_Configuration();
printf("
%s", MESSAGE1);
printf(" %s", MESSAGE2);
printf(" %s
", MESSAGE3);
GPIO_Config();
TIMER_Init();
while (1)
{
// while(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)==1)
// {
// TIM_Cmd(TIM2, ENABLE);
// COUNT1= TIM_GetCounter(TIM2);
// while(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)==0)
// {
// COUNT2= TIM_GetCounter(TIM2);
// TIM2->CNT=0;
// }
// }
// printf("
%2d", COUNT2-COUNT1);
if(Hunk[0]<Hunk[1])
{
printf("
<<< %d %d %d >>>",Hunk[0],Hunk[1],Hunk[1]-Hunk[0]);
}
else
{
printf("
<<< %d %d %d >>>",Hunk[0],Hunk[1],(Hunk[1]+65535)-Hunk[0]);
}
Delay(2500);
}
}
void TIMER_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_ICInitTypeDef TIM2_ICInitStructure;
//TIM_ICInitTypeDef TIM_ICInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* TIM2 clock source enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
/* Enable the TIM2 Update Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Timer configuration in Encoder mode */
TIM_DeInit(TIM2);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Prescaler =(uint16_t) (((SystemCoreClock / 1000000)) - 1); // Shooting for 1 MHz, (1us)
TIM_TimeBaseStructure.TIM_Period = 0xFFFF - 1;//20000 - 1; // 1 MHz / 20000 = 50 Hz (20ms)
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
//--------------------------------設定外部觸發------------------------//
// TIM_ITRxExternalClockConfig(TIM2,TIM_TS_ETRF); //配置外部触?，否?不???
// TIM_ETRClockMode2Config(TIM2, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_Inverted, 0);
// TIM_SetCounter(TIM2, 0);
//--------------------------------------------------------------------//
TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 恁寁怀傷 IC1茬扞善TI1奻
TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //奻汔朓眸鳳
TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //茬扞善TI1奻
TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //饜离怀煦,祥煦
TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 饜离怀薦疏 祥薦疏
TIM_ICInit(TIM2, &TIM2_ICInitStructure);
//---------------------------------------------------------------------//
// Clear all pending interrupts
TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM2, ENABLE);
}
void Delay(__IO uint32_t nTime)
{
TimingDelay = nTime;
while(TimingDelay != 0);
}
/**
* @brief Decrements the TimingDelay variable.
* @param None
* @retval None
*/
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
void GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure the LED_pin as output push-pull for LD3 & LD4 usage*/
RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOC|RCC_AHBPeriph_GPIOA,ENABLE);
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9|GPIO_Pin_8|GPIO_Pin_7|GPIO_Pin_6;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void EXTI0_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIOA clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/* Configure PA0 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable SYSCFG clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
/* Connect EXTI0 Line to PA0 pin */
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
/* Configure EXTI0 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI0 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
//--------------------------------------下面是STM32XXXit.c中斷副程式的部分-----------------------------------------//
/**
************************************************** ****************************
* @file stm32f0xx_it.c
* @author MCD Application Team
* @version V1.0.0
* @date 23-March-2012
* @brief Main Interrupt Service Routines.
* This file provides template for all exceptions handler and
* peripherals interrupt service routine.
************************************************** ****************************
* @attention
*
* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
*
http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_it.h"
//#include "main.h"
void TimingDelay_Decrement(void);
void Delay(__IO uint32_t nTime);
void delayX(uint32_t time);
//static __IO uint32_t TimingDelay;
/** @addtogroup STM32F0-Discovery_Demo
* @{
*/
/** @addtogroup STM32F0XX_IT
* @brief Interrupts driver modules
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/******************************************************************************/
/* Cortex-M0 Processor Exceptions Handlers */
/******************************************************************************/
/**
* @brief This function handles NMI exception.
* @param None
* @retval None
*/
#include "stm32f0xx_it.h"
#include <stdio.h>
#include <string.h>
//#include "main.h"
void TimingDelay_Decrement(void);
extern __IO uint8_t USARTFLAG;
void NMI_Handler(void)
{
}
/**
* @brief This function handles Hard Fault exception.
* @param None
* @retval None
*/
void HardFault_Handler(void)
{
/* Go to infinite loop when Hard Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles SVCall exception.
* @param None
* @retval None
*/
void SVC_Handler(void)
{
}
/**
* @brief This function handles PendSVC exception.
* @param None
* @retval None
*/
void PendSV_Handler(void)
{
}
/**
* @brief This function handles SysTick Handler.
* @param None
* @retval None
*/
void SysTick_Handler(void)
{
TimingDelay_Decrement();
}
/**
* @brief Decrements the TimingDelay variable.
* @param None
* @retval None
*/
/******************************************************************************/
/* STM32F0xx Peripherals Interrupt Handlers */
/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
/* available peripheral interrupt handler's name please refer to the startup */
/* file (startup_stm32f0xx.s). */
/******************************************************************************/
void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
GPIOD->ODR ^= 0x0100;
GPIOD->ODR ^= 0x0200;
TIM_ClearFlag(TIM3, TIM_IT_Update);
}
}
void delayX(uint32_t time)
{
while(time--);
}
uint32_t count[2];
//--------------------Timer2觸發中斷取得計數值-----------------------//
// void TIM2_IRQHandler(void)
//{
// static uint32_t temp=0;
// if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
//{
// count[0]=temp;
//}
//}
//----------------------------------------------------------//
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
//GPIOC->ODR ^= 0x0100;
//GPIOC->ODR ^= 0x0200;
TIM_ClearFlag(TIM2, TIM_IT_Update);
}
}
//------------------------EXIT0 Interrupt----------------------------//
uint32_t Hunk[2];
void EXTI0_1_IRQHandler(void)
{
static int temp=0;
static uint8_t X=0;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
if(EXTI_GetITStatus(EXTI_Line0) != RESET)
{
Hunk[temp]=TIM2->CNT;
//printf("
--%d %d %d", X, temp,Hunk[temp]);
X++;
if(X==10)
X=0;
EXTI_ClearITPendingBit(EXTI_Line0);
//----------------------------------------------//
/* Configure EXTI0 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI0 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//-----------------------------------------------//
temp++;
if(temp==2)
{
temp=0;
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI0 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
}
}
//----------------------有消除彈跳功能範例------------------------//
//void EXTI0_IRQHandler(void) {
//if(EXTI_GetITStatus(EXTI_Line0) != RESET) {
//Delay(0xFFFF); //debounce
//if(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)) { //debounce
//if(btn) {
//btn=0;
//GPIO_SetBits(GPIOB, GPIO_Pin_8);
//}
//else {
//btn++;
//GPIO_ResetBits(GPIOB, GPIO_Pin_8);
//}
//}
//EXTI_ClearITPendingBit(EXTI_Line0);
//}
//}
////-----------------------------------------------------------//
//------------------------------------------------------//
//uint8_t TIM2CH1_CAPTURE_STA=0; //輸入捕獲狀態
//uint16_t TIM2CH1_CAPTURE_VAL; //輸入捕獲值//
//隅奀5笢剿督昢最唗
//void TIM2_IRQHandler(void)
//{
// if((TIM2CH1_CAPTURE_STA&0X80)==0)//遜帤傖髡眸鳳
// {
// if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
//
// {
// if(TIM2CH1_CAPTURE_STA&0X40)//眒冪眸鳳善詢萇賸
// {
// if((TIM2CH1_CAPTURE_STA&0X3F)==0X3F)//詢萇怮酗賸
// {
// TIM2CH1_CAPTURE_STA|=0X80;//梓暮傖髡眸鳳賸珨棒
// TIM2CH1_CAPTURE_VAL=0XFFFF;
// }else TIM2CH1_CAPTURE_STA++;
// }
// }
// if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//眸鳳1楷汜眸鳳岈璃
// {
// if(TIM2CH1_CAPTURE_STA&0X40) //眸鳳善珨跺狟蔥朓
// {
// TIM2CH1_CAPTURE_STA|=0X80; //梓暮傖髡眸鳳善珨棒詢萇闕遵
// TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);
// TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 扢离峈奻汔朓眸鳳
// }else //遜帤羲宎,菴珨棒眸鳳奻汔朓
// {
// TIM2CH1_CAPTURE_STA=0; //諾
// TIM2CH1_CAPTURE_VAL=0;
// TIM_SetCounter(TIM2,0);
// TIM2CH1_CAPTURE_STA|=0X40; //梓暮眸鳳善賸奻汔朓
// TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1扢離峈狟蔥朓眸鳳
// }
// }
// }
//
// TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update); //壺笢剿梓祩弇
//
//}
//------------------------------------------------ --------//
/**
* @brief This function handles PPP interrupt request.
* @param None
* @retval None
*/
/*void PPP_IRQHandler(void)
{
}*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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