功能

TIM1_CC1觸發ADC1進行取樣，取樣使用DMA進行資料傳輸，DMA啟用半滿和全滿中斷，在中斷中進行資料儲存到其他Buff，方便進行處理。

環境

硬體平臺：STM32F103ZE
開發環境：MDK 4.70
作業系統：Windows 10

程式碼

ADCongif.h

#ifndef __ADCONFIG_H_
#define __ADCONFIG_H_

void ADC_Configuration(void);

void ADC1_Init(void);
void ADC1_DMA1_Init(void);
void ADC1_ExternalTrig_T1_CC1_Init(void
 
);
void ADC1_GPIO_Config(void);

#endif

ADConfig.c

/************************************************** 
 *  檔名: ADConfig.c file
 *  描述：  ADC配置檔案
 *------------------------------------------------
 * 作者: xbotao
 * 建立時間：2016-03-02
 * 最後修改：2016-03-02
 * 
 * Copyright (c) 2016 Xbotao
 * 
 *************************************************/

#include <stdio.h>
#include "string.h"
 

#include "stm32f10x.h"
#include "ADConfig.h"

#define ADC_BUFF_LEN    200
#define ADC1_DR_Address    ((uint32_t)0x4001244C)

uint16_t ADC_ConvertedValue[ADC_BUFF_LEN];
uint16_t WriteBuff[ADC_BUFF_LEN];

void ADC_Configuration(void)
{
    ADC1_GPIO_Config();
    ADC1_ExternalTrig_T1_CC1_Init();
    ADC1_DMA1_Init();
 

    ADC1_Init();
}

void ADC1_GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC, ENABLE);

    /* Configure TIM1_CH1 (PA8) as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Configure PC.01 and PC.04 (ADC Channel11 and Channel14) as analog input */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}


void ADC1_Init(void)
{
    ADC_InitTypeDef ADC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

    /* ADC1 configuration ------------------------------------------------------*/
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_Init(ADC1, &ADC_InitStructure);

    ADC_TempSensorVrefintCmd(ENABLE);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 1, ADC_SampleTime_13Cycles5);
    ADC_Cmd(ADC1, ENABLE);

    ADC_ExternalTrigConvCmd(ADC1, ENABLE);

    ADC_DMACmd(ADC1, ENABLE);

    ADC_ResetCalibration(ADC1);
    while(ADC_GetResetCalibrationStatus(ADC1));

    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1));  
}

void ADC1_DMA1_Init(void)
{
    DMA_InitTypeDef DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* DMA1 Channel1 Configuration ----------------------------------------------*/
    DMA_DeInit(DMA1_Channel1);
    DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC_ConvertedValue;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = ADC_BUFF_LEN;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel1, &DMA_InitStructure);

    DMA_ITConfig(DMA1_Channel1, DMA_IT_TC | DMA_IT_HT, ENABLE);

    /* Enable DMA1 channel1 */
    DMA_Cmd(DMA1_Channel1, ENABLE);
}

void ADC1_ExternalTrig_T1_CC1_Init(void)
{
    TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;
    TIM_OCInitTypeDef         TIM_OCInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

    /* Time Base configuration */
    TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); 
    TIM_TimeBaseStructure.TIM_Period = 1000-1;          
    TIM_TimeBaseStructure.TIM_Prescaler = 72-1;       
    TIM_TimeBaseStructure.TIM_ClockDivision = 0x00;    
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    /* TIM1 channel1 configuration in PWM mode */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; 
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;                
    TIM_OCInitStructure.TIM_Pulse = 500; 
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;         
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);

    TIM_CtrlPWMOutputs(TIM1, ENABLE);
    TIM_Cmd(TIM1, DISABLE);
}

void ADC1_DMA1_IT_Hander(void)
{
    if(DMA_GetFlagStatus(DMA1_FLAG_HT1))
    {
        DMA_ClearITPendingBit(DMA_IT_HT);
        memcpy(WriteBuff, ADC_ConvertedValue, ADC_BUFF_LEN*sizeof(uint16_t)/2);
    }

    if(DMA_GetFlagStatus(DMA1_FLAG_TC1))
    {
        DMA_ClearITPendingBit(DMA1_FLAG_TC1);
        memcpy(WriteBuff+ADC_BUFF_LEN/2, ADC_ConvertedValue+ADC_BUFF_LEN/2, ADC_BUFF_LEN*sizeof(uint16_t)/2);
//此處可以增加標誌位
    }

}

main.c

#include "stm32f10x.h"
#include "ADConfig.h"

int main(void)
{
    ADC_Configuration();
    TIM_Cmd(TIM1, ENABLE);

    while (1)
    {
    }
}