如题,想实现ADC的18个通道AD量采集,并开启DMA,将结果存放在ADValue[18]数组里,验证发现,所以数组里的结果都只是通道0的结果!不论我将其他通道对应的引脚加高电平或者低电平,数组里的其他通道结果都不受影响,而全是通道1的特征值,无语!
贴下我的代码:
#include "adc.h"
#include "delay.h"
#include "usart.h"
vu16 ADValue[18]={ 1000,1023,2034,3055,4096};
//------------------------------------------------------ADC配置
void ADC_Configeration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 |
GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
// PA0-PA7 -> ADC0-ADC7
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 ; // PB0 -> ADC8 PB1-> ADC9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
// PC0-PC3 -> ADC10 - ADC13
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 18;
ADC_Init(ADC1, &ADC_InitStructure);
//ADC内置温度传感器使能
ADC_TempSensorVrefintCmd(ENABLE);
//常规转换序列1,ADC通道0 依次类推采集全部16个通道
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 5, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 6, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 7, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 8, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 9, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 10, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_10,11, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11,12, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12,13, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_13,14, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_14,15, ADC_SampleTime_13Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_15,16, ADC_SampleTime_13Cycles5);
//常规转换序列16:通道16内部温度传感器),采样时间>2.2us,(239cycles)
ADC_RegularChannelConfig(ADC1, ADC_Channel_16,17, ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_17,18, ADC_SampleTime_13Cycles5);
//使能ADC1
ADC_Cmd(ADC1, ENABLE);
//使能ADC的DMA支持
ADC_DMACmd(ADC1, ENABLE);
//重置校准
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
//开始校准
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));
ADC_SoftwareStartConvCmd(ADC1, ENABLE); // ADC1连续转换开始
}
//---------------------------------------------------------------ADC DMA使能
void ADCDMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel1); // DMA通道1硬件就是专供ADC1的
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
//BufferSize=18,因为ADC转换序列有18个通道
//如此设置,使序列1结果放在AD_Value[0],序列2结果放在AD_Value[1],………序列18结果放在AD_Value[17]
DMA_InitStructure.DMA_BufferSize = 18;
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;
//循环模式开启,Buffer写满后,自动回到初始地址开始传输
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);
//使能DMA通道
DMA_Cmd(DMA1_Channel1, ENABLE);
}
问题已经解决:
调用顺序得调整一下。先初始化DMA,再初始化ADC就好很多了。具体原因现在还不明确。我正加紧调试,准备找出规律来。
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