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#include "adc.h"
#include "delay.h"
#include "stm32f10x.h"
#define ADC1_DR_Address ? ?((u32)0x40012400+0x4c)
?#define Sample_Num 10
#define Channel_Num 2
?
__IO uint16_t ADC_ConvertedValue[Sample_Num][Channel_Num];
u16 AD_After_Filter[Channel_Num];?
?
?
?
static void ADC1_GPIO_Config(void)
{
?? ?GPIO_InitTypeDef GPIO_InitStructure;
?? ?
?? ?/* Enable DMA clock */
?? ?RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
?? ?
?? ?/* Enable ADC1 and GPIOA clock */
?? ?RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
?? ?
?? ?/* Configure PA0-PA4 ?as analog input */
?? ?GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
?? ?GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;? ?
?? ?GPIO_Init(GPIOA, &GPIO_InitStructure);? ? ? ? ? ? ? ?
}
?
static void ADC1_Mode_Config(void)
{
?? ?DMA_InitTypeDef DMA_InitStructure;
?? ?ADC_InitTypeDef ADC_InitStructure;
?? ?
?? ?/* Enable DMA clock */
?? ?RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
?? ?/* Enable ADC1 and GPIOA clock */
?? ?RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
?? ?
?? ?/* DMA channel1 configuration */
?? ?DMA_DeInit(DMA1_Channel1);? ??
?? ?DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;? ??
?? ?DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;? ?
?? ?DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;? ?
?? ?DMA_InitStructure.DMA_BufferSize = Sample_Num*Channel_Num;
?? ?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_Normal;? ??
?? ?DMA_InitStructure.DMA_Priority = DMA_Priority_High;
?? ?DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;? ??
?? ?DMA_Init(DMA1_Channel1, &DMA_InitStructure);? ??
?? ?
?? ?/* Enable DMA channel1 */
?? ?DMA_Cmd(DMA1_Channel1, ENABLE);
?? ?
?? ?
?? ?/* ADC1 configuration */
?? ?ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;? ?
?? ?ADC_InitStructure.ADC_ScanConvMode = ENABLE ;? ??
?? ?//ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;? ?
?? ?ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;? ?
?? ?ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;? ?
?? ?ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;? ?
?? ?ADC_InitStructure.ADC_NbrOfChannel = Channel_Num;? ? ? ??
?? ?ADC_Init(ADC1, &ADC_InitStructure);
?? ?
?? ?RCC_ADCCLKConfig(RCC_PCLK2_Div6);?
?? ?ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5 );? ?
?? ?ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5 );? ?
?? ?
?? ?ADC_DMACmd(ADC1, ENABLE);?? ?// Enable ADC1 DMA
?? ?ADC_Cmd(ADC1, ENABLE);?? ?// Enable ADC1
?? ?
?? ?ADC_ResetCalibration(ADC1);? ?
?? ?while(ADC_GetResetCalibrationStatus(ADC1));? ?
?? ?ADC_StartCalibration(ADC1);? ?
?? ?while(ADC_GetCalibrationStatus(ADC1));? ??
?? ??
?? ?//ADC_SoftwareStartConvCmd(ADC1, ENABLE);? ??
}
?
?void ADC1_Init(void)
{
?? ?ADC1_GPIO_Config();
?? ?ADC1_Mode_Config();
}
?
//函数中不加红色部分会导致2路adc位置飘忽不定
//估计是停止采集ADC_SoftwareStartConvCmd(ADC1, DISABLE)没起作用
u16 Read_ADC_AverageValue(u16 Channel)
{
?? ?u8 t;
?? ?u32 sum = 0;
?? ?
? ??
?? ?DMA_SetCurrDataCounter(DMA1_Channel1,Sample_Num*Channel_Num);? ? ? ? ? ? ? ?
?? ?DMA_Cmd(DMA1_Channel1,ENABLE);
? ? ADC_Cmd(ADC1, ENABLE);
?? ?ADC_SoftwareStartConvCmd(ADC1, ENABLE);? ? ? ? ? ? ? ? ?
?? ?while(DMA_GetFlagStatus(DMA1_FLAG_TC1)!=SET);? ? ? ? ? ?
?? ?DMA_ClearFlag(DMA1_FLAG_TC1);? ? ? ? ? ? ? ? ? ? ? ? ??
?? ?DMA_Cmd(DMA1_Channel1,DISABLE);?? ?
?? ?ADC_SoftwareStartConvCmd(ADC1, DISABLE);?? ?
?? ?ADC_Cmd(ADC1, DISABLE);
? ??
?? ?for(t=0;t<Sample_Num;t++)
? ? {
? ? ? ? sum += ADC_ConvertedValue[t][Channel];
? ? }
?? ?AD_After_Filter[Channel] = sum/Sample_Num;
?? ?sum = 0;
? ??
?? ?return AD_After_Filter[Channel];?? ?
}
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