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运行程序，在EXTI11线路上（对应管脚PE.11）上的上升沿信号，将触发ADC1对ADC信道14上的输入进行regular转化，并通过DMA将结果传送到内存中的ADC_RegularConvertedValueTab表格，在下一个上升沿信号，将触发ADC1对ADC信道14上的输入进行regular转化，结果也会通过DMA传送到同一张表格中。设置DMA模块，将传送量限制为64个数据。

同样的，对于EXTI15线路上（对应管脚PE.15）上的上升沿信号，将触发ADC1对ADC信道10和ADC信道11上的输入进行injected转化，转化完成后产生中断，中断中把转化结果传送到ADC_InjectedConvertedValueTab表格。

对于EKSTM32F板，由于管脚PE.11和PE.15已经被LCD占用，因此，改为利用管脚PD.11和PD.15，分别对应板上小键盘（KEY4）的SEL建和DOWN健。

由于分压器（VR1）连接在通道10（ADC Channel10）上，因此把这个通道上的转化结果显示在LCD上，用来验证。

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x_lib.h"

#include "lcd.h" // Add for LCD display

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

#define ADC1_DR_Address    ((u32)0x4001244C)

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

ADC_InitTypeDef   ADC_InitStructure;

DMA_InitTypeDef   DMA_InitStructure;

vu16 ADC_RegularConvertedValueTab[64], ADC_InjectedConvertedValueTab[32];

ErrorStatus HSEStartUpStatus;

extern vu16 Index;

/* Private function prototypes -----------------------------------------------*/

void RCC_Configuration(void);

void GPIO_Configuration(void);

void NVIC_Configuration(void);

void EXTI_Configuration(void);

void LcdShow_Init(void);

void displayconvert(vu16 value); 

/* Private functions ---------------------------------------------------------*/

void delay(void);

void delay()

{

int i,j; j=0;

for (i=0; i<0xfffff; i++) j++;

}

char display[4]={0,0};

/*******************************************************************************

* Function Name  : main

* Description    : Main program

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

int main(void)

{

#ifdef DEBUG

  debug();

#endif

  /* System clocks configuration ---------------------------------------------*/

  RCC_Configuration();

  /* NVIC configuration ------------------------------------------------------*/

  NVIC_Configuration();

  /* GPIO configuration ------------------------------------------------------*/

  GPIO_Configuration();

  /* EXTI configuration ------------------------------------------------------*/

  EXTI_Configuration();

  LcdShow_Init();

  /* DMA channel1 configuration ----------------------------------------------*/

  DMA_DeInit(DMA_Channel1);

  DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;

  DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RegularConvertedValueTab;

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

  DMA_InitStructure.DMA_BufferSize = 64;

  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(DMA_Channel1, &DMA_InitStructure);

  /* Enable DMA channel1 */

  DMA_Cmd(DMA_Channel1, ENABLE);

  /* ADC1 configuration ------------------------------------------------------*/

  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

  ADC_InitStructure.ADC_ScanConvMode = ENABLE;

  ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;

  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_Ext_IT11;

//选择外部中断线11事件作为转换外部触发

  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

  ADC_InitStructure.ADC_NbrOfChannel = 2;

  ADC_Init(ADC1, &ADC_InitStructure);

  /* ADC1 regular channels configuration */

  ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_28Cycles5);

  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 2, ADC_SampleTime_28Cycles5);

//设置指定ADC的规则组通道，设置它们的转化顺序和采样时间

  /* Regular discontinuous mode channel number configuration */

  ADC_DiscModeChannelCountConfig(ADC1, 1);  对ADC规则组通道配置间断模式

  /* Enable regular discontinuous mode */

  ADC_DiscModeCmd(ADC1, ENABLE);     //使能ADC1规则组通道的间断模式

  /* Enable ADC1 external trigger conversion */

  ADC_ExternalTrigConvCmd(ADC1, ENABLE);//使能ADC1的经外部触发启动转换功能

  /* Set injected sequencer length */

  ADC_InjectedSequencerLengthConfig(ADC1, 2);

  /* ADC1 injected channel configuration */

  ADC_InjectedChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_28Cycles5);

  ADC_InjectedChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_28Cycles5);

  /* ADC1 injected external trigger configuration */

  ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_Ext_IT15);

//选择外部中断线15事件作为注入转换外部触发

  /* Enable ADC1 injected external trigger conversion */

  ADC_ExternalTrigInjectedConvCmd(ADC1, ENABLE);

  /* Enable JEOC interupt */

  ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);

  /* Enable ADC1 DMA */

  ADC_DMACmd(ADC1, ENABLE);

  /* Enable ADC1 */

  ADC_Cmd(ADC1, ENABLE); 

  /* Enable ADC1 reset calibaration register */  

  ADC_ResetCalibration(ADC1);

  /* Check the end of ADC1 reset calibration register */

  while(ADC_GetResetCalibrationStatus(ADC1));

  /* Start ADC1 calibaration */

  ADC_StartCalibration(ADC1);

  /* Check the end of ADC1 calibration */

  while(ADC_GetCalibrationStatus(ADC1));

  while (1)

  {

    /* Show ADC channel10 (pin PC.00) value

    from ADC_InjectedConvertedValueTab on LCD display */

    if (Index == 0) displayconvert(ADC_InjectedConvertedValueTab[Index]);

    else displayconvert(ADC_InjectedConvertedValueTab[Index-2]);

    write_string(display);

    delay();

  }

}

/*******************************************************************************

* Function Name  : RCC_Configuration

* Description    : Configures the different system clocks.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void RCC_Configuration(void)

{

  /* RCC system reset(for debug purpose) */

  RCC_DeInit();

  /* Enable HSE */

  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */

  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)

  {

    /* Enable Prefetch Buffer */

    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */

    FLASH_SetLatency(FLASH_Latency_2);

    /* HCLK = SYSCLK */

    RCC_HCLKConfig(RCC_SYSCLK_Div1);

    /* PCLK2 = HCLK */

    RCC_PCLK2Config(RCC_HCLK_Div1);

    /* PCLK1 = HCLK/2 */

    RCC_PCLK1Config(RCC_HCLK_Div2);

    /* ADCCLK = PCLK2/4 */

    RCC_ADCCLKConfig(RCC_PCLK2_Div4);

    /* PLLCLK = 8MHz * 7 = 56 MHz */

    RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_7);

    /* Enable PLL */

    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */

    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)

    {

    }

    /* Select PLL as system clock source */

    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */

    while(RCC_GetSYSCLKSource() != 0x08)

    {

    }

  }

/* Enable peripheral clocks --------------------------------------------------*/  

  /* Enable DMA clock */

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA, ENABLE);

  /* Enable GPIOs and ADC1 clock */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC |

                         RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |

                         RCC_APB2Periph_AFIO | RCC_APB2Periph_ADC1, ENABLE);

  /* TIM2 clocks enable */  //For LCD display

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); 

}

/*******************************************************************************

* Function Name  : EXTI_Configuration

* Description    : Configures the different EXTI lines.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void EXTI_Configuration(void)

{

  EXTI_InitTypeDef EXTI_InitStructure;

  /* Select the EXTI Line11 the GPIO pin source */

  // Change PE.11 -> PD.11 (JOY_SEL on EKSTM32 board)

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource11);

  /* EXTI line11 configuration -----------------------------------------------*/ 

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;

  EXTI_InitStructure.EXTI_Line = EXTI_Line11;

  EXTI_InitStructure.EXTI_LineCmd = ENABLE;

  EXTI_Init(&EXTI_InitStructure);

  /* Select the EXTI Line15 the GPIO pin source */

  // Change PE.15 -> PD.15 (JOY_SEL on EKSTM32 board)

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource15);

  /* EXTI line15 configuration -----------------------------------------------*/ 

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Event;

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;

  EXTI_InitStructure.EXTI_Line = EXTI_Line15;

  EXTI_InitStructure.EXTI_LineCmd = ENABLE;

  EXTI_Init(&EXTI_InitStructure);

}

/*******************************************************************************

* Function Name  : GPIO_Configuration

* Description    : Configures the different GPIO ports.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  /* Configure PC.00, PC.01 and PC.04 (ADC Channel10, Channel11 and Channel14)

   as analog input -----------------------------------------------------------*/

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PA.04 (ADC Channel4) as analog input --------------------------*/

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure EXTI line11 ---------------------------------------------------*/

  // Change PE.11 -> PD.11 (JOY_SEL on EKSTM32 board)

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure EXTI line15 ---------------------------------------------------*/

  // Change PE.15 -> PD.15 (JOY_DOWN on EKSTM32 board)

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

  GPIO_Init(GPIOD, &GPIO_InitStructure);

  // for LCD display

  /* Configure PE.00 -- PE.15 as Output push-pull : SEG0~15 */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOE, &GPIO_InitStructure);

  /* Configure PC.08 -- PC.11 as Output push-pull  : COM1~4 */

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOC, &GPIO_InitStructure);

}

/*******************************************************************************

* Function Name  : NVIC_Configuration

* Description    : Configures NVIC and Vector Table base location.

* Input          : None

* Output         : None

* Return         : None

*******************************************************************************/

void NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

#ifdef  VECT_TAB_RAM 

  /* Set the Vector Table base location at 0x20000000 */

  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);

#else  /* VECT_TAB_FLASH  */

  /* Set the Vector Table base location at 0x08000000 */

  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);  

#endif

  /* Configure and enable ADC interrupt */

  NVIC_InitStructure.NVIC_IRQChannel = ADC_IRQChannel;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  /* enabling interrupt */ // For LCD enable IT from TIM2

  NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQChannel;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

/***************************************************************************

* Function Name  : LcdShow_Init

* Description    : Configures TIM2 for LCD display

* Input          : None

* Output         : None

* Return         : None

***************************************************************************/

void LcdShow_Init(void)

{

  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

  TIM_OCInitTypeDef  TIM_OCInitStructure;

  /* Time base configuration */

  TIM_TimeBaseStructure.TIM_Period = 8000;

  TIM_TimeBaseStructure.TIM_Prescaler = 17;

  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  TIM_ARRPreloadConfig(TIM2,DISABLE);

  /* only counter overflow/underflow generate U interrupt */

  TIM_UpdateRequestConfig(TIM2,TIM_UpdateSource_Regular);

  /* Output Compare Timing Mode configuration: Channel1 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;

  TIM_OCInitStructure.TIM_Channel = TIM_Channel_1;

  TIM_OCInitStructure.TIM_Pulse = 4000;

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OCInit(TIM2, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);

  /* TIM IT enable */

  TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_Update, ENABLE);

  /* TIM2 enable counter */

  TIM_Cmd(TIM2, ENABLE);

}

/***************************************************************************

* Function Name  : displayconvert

* Description    : convert data to displayable form

* Input          : None

* Output         : None

* Return         : None

***************************************************************************/

void displayconvert(vu16 value)

{

  u8 num1 = value&0xf;

  u8 num2 = (value&0xff)>>4;

  u8 num3= (value&0xfff)>>8;

  u8 num4 = value>>12;

  if (num1>9)

    display[3]=num1+(65-10);

  else

    display[3]=num1+(48-0);

  if (num2>9)

    display[2]=num2+(65-10);