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发表于 2017-1-2 11:12:37
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#include "adc.h"
#include "delay.h"
//////////////////////////////////////////////////////////////////////////////////
// ADC初始化
//////////////////////////////////////////////////////////////////////////////////
/* define ---------------------------------------------------------------------*/
#define ADC3_DR_ADDRESS ((uint32_t)0x4001204C)
/* 变量 ----------------------------------------------------------------------*/
extern u16 ADC3ConvertedValue[64][8]; ///采2个通道，采64次平均
//初始化ADC
void Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* 使能 ADC3, DMA2 和 GPIO 时钟 ****************************************/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOF, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);
/* DMA2 Stream0 channel0 配置 **************************************/
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC3_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)ADC3ConvertedValue;
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);
/* 配置ADC3通道 引脚为模拟输入模式******************************/
/// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_5;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;//采集电压的引脚为PF3--PF10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOF, &GPIO_InitStructure);
/****************************************************************************
PCLK2 = HCLK / 2
下面选择的是2分频
ADCCLK = PCLK2 /2 = HCLK / 4 = 168 / 4 = 42M
ADC采样频率： Sampling Time + Conversion Time = 3 + 12 cycles = 15cyc
Conversion Time = 42MHz / 15cyc = 2.8Mbps.
*****************************************************************************/
/* ADC公共部分初始化**********************************************************/
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_20Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
/* ADC1 初始化 ****************************************************************/
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 = 8;
ADC_Init(ADC3, &ADC_InitStructure);
/* ADC3 规则 channel 9 14 15 4 5 6 7 8 配置 *************************************/
// ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_84Cycles);
// ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 2, ADC_SampleTime_84Cycles);
//何武龙配置不能动， ADC3采样 规则排序 对应PCB板电路 *************************************/
ADC_RegularChannelConfig(ADC3,ADC_Channel_9, 1, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_14, 2, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_15, 3, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_4, 4, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_5, 5, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_6, 6, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_7, 7, ADC_SampleTime_84Cycles );
ADC_RegularChannelConfig(ADC3,ADC_Channel_8, 8, ADC_SampleTime_84Cycles );
//ADC3采样 规则排序 *******************************************************************/
/* 使能DMA请求(单ADC模式) */
ADC_DMARequestAfterLastTransferCmd(ADC3, ENABLE);
/* 使能 ADC3 DMA */
ADC_DMACmd(ADC3, ENABLE);
/* 使能 ADC3 */
ADC_Cmd(ADC3, ENABLE);
/* 软件启动ADC3转换 */
ADC_SoftwareStartConv(ADC3);
}
以下是主程序读取
for(i=0;i<8;i++)
{
for(j=0;j<64;j++)
{
ADC3ConvertedVoltage[i] += ADC3ConvertedValue[j][i];
}
ADC3ConvertedVoltage[i] = ADC3ConvertedVoltage[i]/64;
if(i==0)register_data_group.heampere=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==1)register_data_group.cishanchi=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==2)register_data_group.yali=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==3)register_data_group.hv=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==4)register_data_group.av=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==5)register_data_group.ha=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==6)register_data_group.ap=ADC3ConvertedVoltage[i]&0xFFFF;
else if(i==7)register_data_group.ac=ADC3ConvertedVoltage[i]&0xFFFF;
else ;
}
读出来都是 0 ，这是论坛用师兄的程序改的。大家帮我看一下问题出在哪 ？
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发表于 2016-12-31 11:02:19
发表于 2017-1-1 20:30:03
