- 主程序
- int main(void)
- {
- delay_init(168);
- uart_init(115200);
- Adc_Init();
- LED_Init();
- delay_ms(10);
- LED0=0;
- MYDMA_Config(DMA2_Stream0,(u32)&ADC1->DR,(u32)&ADC_V);
- while(1)
- {
- if(DMA_GetFlagStatus(DMA2_Stream0,DMA_FLAG_TCIF0)!=RESET)
- {
- printf("adc0=%d ",ADC_V[0]);
- printf("adc1=%d ",ADC_V[1]);
- printf("adc0=%d ",ADC_V[2]);
- printf("adc1=%d ",ADC_V[3]);
- DMA_ClearFlag(DMA2_Stream0,DMA_FLAG_TCIF0);
- }
- delay_ms(1);
- }
- }
- ADC的程序
- void Adc_Init(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- ADC_CommonInitTypeDef ADC_CommonInitStructure;
- ADC_InitTypeDef ADC_InitStructure;
-
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//ʹÄÜGPIOAʱÖÓ
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //ʹÄÜADC1ʱÖÓ
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_5|GPIO_Pin_6;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//Ä£ÄâÊäÈë
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;//²»´øÉÏÏÂÀ
- GPIO_Init(GPIOA, &GPIO_InitStructure);//³õʼ»¯
-
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC1¸´Î»
- RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE); //¸´Î»½áÊø
-
-
- ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//¶ÀÁ¢Ä£Ê½
- ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//Á½¸ö²ÉÑù½×¶ÎÖ®¼äµÄÑÓ³Ù5¸öʱÖÓ
- ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
- ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;//Ô¤·ÖƵ4·ÖƵ¡£ADCCLK=PCLK2/4=84/4=21Mhz,ADCʱÖÓ×îºÃ²»Òª³¬¹ý36Mhz
- ADC_CommonInit(&ADC_CommonInitStructure);//³õʼ»¯
-
- ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//12λģʽ
- ADC_InitStructure.ADC_ScanConvMode = ENABLE;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//½ûÖ¹´¥·¢¼ì²â£¬Ê¹ÓÃÈí¼þ´¥·¢
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//ÓÒ¶ÔÆë
- ADC_InitStructure.ADC_NbrOfConversion = 4;
- ADC_Init(ADC1, &ADC_InitStructure);//ADC³õʼ»¯
-
- ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_480Cycles ); //ADC1,ADCͨµÀ,480¸öÖÜÆÚ,Ìá¸ß²ÉÑùʱ¼ä¿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_Cmd(ADC1, ENABLE);
- ADC_SoftwareStartConv(ADC1);
- ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE);
- ADC_DMACmd(ADC1,ENABLE);
-
- }
- 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);//DMA2ʱÖÓʹÄÜ
-
- }else
- {
- RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);//DMA1ʱÖÓʹÄÜ
- }
- DMA_DeInit(DMA_Streamx);
-
- while (DMA_GetCmdStatus(DMA_Streamx) != DISABLE){}//µÈ´ýDMA¿ÉÅäÖÃ
-
- /* ÅäÖÃ DMA Stream */
- DMA_InitStructure.DMA_Channel = DMA_Channel_0; //ͨµÀÑ¡Ôñ
- DMA_InitStructure.DMA_PeripheralBaseAddr = par;//DMAÍâÉèµØÖ·
- DMA_InitStructure.DMA_Memory0BaseAddr = mar;//DMA ´æ´¢Æ÷0µØÖ·
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//ÍâÉèµ½´æ´¢Æ÷
- DMA_InitStructure.DMA_BufferSize = 4;//Êý¾Ý´«ÊäÁ¿
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//ÍâÉè·ÇÔöÁ¿Ä£Ê½
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//´æ´¢Æ÷ÔöÁ¿Ä£Ê½
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//ÍâÉèÊý¾Ý³¤¶È:16λ
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//´æ´¢Æ÷Êý¾Ý³¤¶È:16λ
- DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//Ñ»·Ä£Ê½
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;//ÖеÈÓÅÏȼ¶
- 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;//ÍâÉèÍ»·¢µ¥´Î´«Êä
- DMA_Init(DMA_Streamx, &DMA_InitStructure);//³õʼ»¯DMA Stream
- DMA_Cmd(DMA_Streamx, ENABLE); //¿ªÆôDMA´«Êä
-
- }
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2018-8-13 13:51
楼主问题解决了吗?我也月到这样的问题了
2个回答
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