[mw_shl_code=c,true]主程序
u16 ad_value[32][4];
u16 ad_qq[4];
float ADC_V[4];
int main(void)
{
delay_init(168);
uart_init(115200);
Adc_Init();
LED_Init();
delay_ms(10);
LED0=0;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
MYDMA_Config(DMA2_Stream0,(u32)&ADC1->DR,(u32)&ADC_V);
while(1);
}
void DMA2_Stream0_IRQHandler(void)
{
if(DMA_GetITStatus(DMA2_Stream0,DMA_IT_TCIF0) != RESET)
{
int sum = 0;
u8 count,i;
u8 N=32;
LED0=0;
for(i=0;i<4;i++)
{
for ( count=0;count<N;count++)
{
sum += ad_value[count];
}
ad_qq=sum/N;
sum=0;
}
for(i=0;i<4;i++)
{
ADC_V=(float)ad_qq*3.3/4026;
printf("%f",ADC_V);
delay_ms(1);
}
printf("
");
delay_ms(1);
DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_TCIF0);
}
}
ADC程序
void Adc_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//ê1ÄüGPIOAê±Öó
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //ê1ÄüADC1ê±Öó
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//Ä£Äaêäèë
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//2»′øéÏÏÂà-
GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉ
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC1¸′λ
RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE); //¸′λ½áêø
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//¶àá¢Ä£ê½
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//ὸö2éÑù½×¶ÎÖ®¼äμÄÑó3ù5¸öê±Öó
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;//Ô¤·ÖÆμ4·ÖÆμ¡£ADCCLK=PCLK2/4=84/4=21Mhz,ADCê±Öó×îoÃ2»òa3¬1y36Mhz
ADC_CommonInit(&ADC_CommonInitStructure);//3õê¼»ˉ
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//12λÄ£ê½
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//½ûÖ1′¥·¢¼ì2a£¬ê1óÃèí¼t′¥·¢
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//óò¶ÔÆë
ADC_InitStructure.ADC_NbrOfConversion = 4;
ADC_Init(ADC1, &ADC_InitStructure);//ADC3õê¼»ˉ
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_480Cycles ); //ADC1,ADCí¨μà,480¸öÖüÆú,ìá¸ß2éÑùê±¼ä¿éòÔìá¸ß¾«è·¶è
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_480Cycles );
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 3, ADC_SampleTime_480Cycles );
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 4, ADC_SampleTime_480Cycles );
ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE);
ADC_DMACmd(ADC1,ENABLE);
ADC_Cmd(ADC1, ENABLE);
ADC_SoftwareStartConv(ADC1);
}
DMA程序
void MYDMA_Config(DMA_Stream_TypeDef *DMA_Streamx,u32 par,u32 mar)
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
if((u32)DMA_Streamx>(u32)DMA2)//μÃμ½μ±Ç°streamêÇêôóúDMA2»1êÇDMA1
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);//DMA2ê±Öóê1Äü
}else
{
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);//DMA1ê±Öóê1Äü
}
DMA_DeInit(DMA_Streamx);
while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE){}//μè′yDMA¿éÅäÖÃ
/* ÅäÖÃ DMA Stream */
DMA_InitStructure.DMA_Channel = DMA_Channel_0; //í¨μàÑ¡Ôñ
DMA_InitStructure.DMA_PeripheralBaseAddr = par;//DMAíaéèμØÖ·
DMA_InitStructure.DMA_Memory0BaseAddr = mar;//DMA ′æ′¢Æ÷0μØÖ·
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//íaéèμ½′æ′¢Æ÷
DMA_InitStructure.DMA_BufferSize = 4;//êy¾Y′«êäá¿
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//íaéè·ÇÔöá¿Ä£ê½
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//′æ′¢Æ÷Ôöá¿Ä£ê½
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//íaéèêy¾Y3¤¶è:16λ
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//′æ′¢Æ÷êy¾Y3¤¶è:16λ
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//Ñ-»·Ä£ê½
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;//ÖDμèóÅÏ輶
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;//′æ′¢Æ÷í»·¢μ¥′Î′«êä
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//íaéèí»·¢μ¥′Î′«êä
DMA_Init(DMA_Streamx, &DMA_InitStructure);//3õê¼»ˉDMA Stream
DMA_Cmd(DMA_Streamx, ENABLE); //¿aÆôDMA′«êä
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_ITConfig(DMA2_Stream0,DMA_IT_TC, ENABLE);
}
[/mw_shl_code]
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你在f103上的四路采集与这个由什么不一样的地方吗?
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