#include "adc.h"
#include "delay.h"   
#define ADC1_DR_ADDRESS    ((uint32_t)0x4001204C)
/* ±äÁ¿ ----------------------------------------------------------------------*/
extern __IO uint16_t ADC1ConvertedValue[64][2];
//³õʼ»¯ADC                  
void  Adc_Init(void)
{   
    ADC_InitTypeDef       ADC_InitStructure;
    ADC_CommonInitTypeDef ADC_CommonInitStructure;
    DMA_InitTypeDef       DMA_InitStructure;
    GPIO_InitTypeDef      GPIO_InitStructure;
    /* ʹÄÜ ADC1, DMA2 ºÍ GPIO ʱÖÓ ****************************************/
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
    /* DMA2 Stream0 channel0 ÅäÖÃ **************************************/
    DMA_InitStructure.DMA_Channel = DMA_Channel_0;  
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)ADC1ConvertedValue;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = 128;
    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_FIFOMode = DMA_FIFOMode_Disable;         
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMA2_Stream0, &DMA_InitStructure);
    DMA_Cmd(DMA2_Stream0, ENABLE);
    /* ÅäÖÃADC1ͨµÀ3¡¢5Òý½ÅΪģÄâÊäÈëģʽ******************************/
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div8;
    ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
    ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_20Cycles;
    ADC_CommonInit(&ADC_CommonInitStructure);
    /* ADC1 ³õʼ»¯ ****************************************************************/
    ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
    ADC_InitStructure.ADC_ScanConvMode = ENABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfConversion = 2;
    ADC_Init(ADC1, &ADC_InitStructure);
    /* ADC1 ¹æÔò channel3¡¢5 ÅäÖà *************************************/
    ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_84Cycles);
    ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_84Cycles);
   
    /* ʹÄÜDMAÇëÇó(µ¥ADCģʽ) */
    ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

    /* ʹÄÜ ADC1 DMA */
    ADC_DMACmd(ADC1, ENABLE);
    /* ʹÄÜ ADC1 */
    ADC_Cmd(ADC1, ENABLE);
ADC_SoftwareStartConv(ADC1);
}