没路单独测试偶没有问题,连续采集就会出现数据混乱,求指教!!!
unsigned int after_value[5];
unsigned int average_value[5];
#define ADC1_DR_ADDRESS ((uint32_t)0x40012440)
void ADC_DMA_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
ADC_DeInit(ADC1);
/* RCC Config */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* GPIO Config */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_3|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* DMA1 Config */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&after_value;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 5;
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(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
ADC_DMACmd(ADC1, ENABLE);//Enable ADC_DMA
/* ADC1 Config */
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
//ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_TRGO;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_ChannelConfig(ADC1, ADC_Channel_0, ADC_SampleTime_239_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_239_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_3, ADC_SampleTime_239_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_6, ADC_SampleTime_239_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_7, ADC_SampleTime_239_5Cycles);
ADC_GetCalibrationFactor(ADC1);
ADC_Cmd(ADC1, ENABLE);
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));
ADC_StartOfConversion(ADC1);
}
void Read_ADC(void)
{
unsigned char a,b,c,d,i;
for(i=0;i<M;i++)
{
while((DMA_GetFlagStatus(DMA1_FLAG_TC1)) == RESET);//Test DMA1 TC flag
DMA_ClearFlag(DMA1_FLAG_TC1);//Clear DMA TC flag
average_value = (unsigned int)((after_value*3342)/0x0FFF);
a = average_value/1000;
b = (average_value - a*1000)/100;
c = (average_value - a*1000 - b*100)/10;
d = average_value - a*1000 - b*100 - c*10;
USART_Put_Char(0x56);//"V"
USART_Put_Char(i+48);
USART_Put_Char(0x3D);//"="
USART_Put_Char(a+48);
USART_Put_Char(0x2e);//"."
USART_Put_Char(b+48);
USART_Put_Char(c+48);
USART_Put_Char(d+48);
USART_Put_Char(0x56);//"V"
USART_Put_Char(0xD);
USART_Put_Char(0xA);
}
}
void USART_Config()
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//
USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
USART_Init(USART1,&USART_InitStructure);//?®??????
//USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_Cmd(USART1,ENABLE);
}
void USART_Put_Char(unsigned char ch)
{
USART_SendData(USART1,ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
}
int main(void)
{
ADC_DMA_Config();
USART_Config();
while(1)
{
delay_s(1);
Read_ADC();
USART_Put_Char(0xD);
USART_Put_Char(0xA);
}
}
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