新手上路
- 积分
- 20
- 金钱
- 20
- 注册时间
- 2016-6-7
- 在线时间
- 4 小时
|
本帖最后由 xuande 于 2016-6-7 17:29 编辑
vu16 ADC_Val[12]={0,0,0,0,0,0,0,0,0,0,0,0};
u16 J;
void ADC_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC , ENABLE ); //ê1ÄüADC1í¨μàê±Öó
//PA1 ×÷ÎaÄ£Äaí¨μàêäèëòy½Å
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //Ä£Äaêäèëòy½Å
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //Ä£Äaêäèëòy½Å
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //Ä£Äaêäèëòy½Å
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void ADC_DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 , ENABLE );
RCC_ADCCLKConfig(RCC_PCLK2_Div8); //éèÖÃADC·ÖÆμòò×ó6 72M/6=12,ADC×î′óê±¼ä2»Äü3¬1y14M
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr=(u32)&(ADC1->DR);
DMA_InitStructure.DMA_MemoryBaseAddr=(u32)&ADC_Val;
DMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize=12;
DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_MemoryDataSize=DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_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_ITConfig(DMA1_Channel1,DMA1_IT_TC1,ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
// DMA_ITConfig(DMA1_Channel1,DMA1_IT_TC1,ENABLE);
ADC_DeInit(ADC1); //¸′λADC1,½«íaéè ADC1 μÄè«2¿¼Ä′æÆ÷ÖØéèÎaè±ê¡Öμ
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1¤×÷Ä£ê½:ADC1oíADC21¤×÷Ôú¶àá¢Ä£ê½
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //Ä£êy×a»»1¤×÷Ôúμ¥í¨μàÄ£ê½
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //Ä£êy×a»»1¤×÷Ôúμ¥′Î×a»»Ä£ê½
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //×a»»óéèí¼t¶ø2»êÇía2¿′¥·¢Æô¶ˉ
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADCêy¾Yóò¶ÔÆë
ADC_InitStructure.ADC_NbrOfChannel = 12; //Ë3Dò½øDD1æÔò×a»»μÄADCí¨μàμÄêyÄ¿
ADC_Init(ADC1, &ADC_InitStructure); //¸ù¾YADC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèADCxμļÄ′æÆ÷
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 3, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 4, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 5, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 6, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 7, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 8, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 9, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 10, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 11, ADC_SampleTime_239Cycles5 );
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 12, ADC_SampleTime_239Cycles5 );
// ¿aÆôADCμÄDMAÖ§3Ö£¨òaêμÏÖDMA1|Äü£¬»1Dè¶àá¢ÅäÖÃDMAí¨μàμè2Îêy£©
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE); //ê1ÄüÖ¸¶¨μÄADC1
ADC_ResetCalibration(ADC1); //¸′λָ¶¨μÄADC1μÄD£×¼¼Ä′æÆ÷
while(ADC_GetResetCalibrationStatus(ADC1)); //»ñè¡ADC1¸′λD£×¼¼Ä′æÆ÷μÄ×′ì¬,éèÖÃ×′ì¬Ôòμè′y
ADC_StartCalibration(ADC1); //¿aê¼Ö¸¶¨ADC1μÄD£×¼×′ì¬
while(ADC_GetCalibrationStatus(ADC1)); //»ñè¡Ö¸¶¨ADC1μÄD£×¼3ìDò,éèÖÃ×′ì¬Ôòμè′y
ADC_SoftwareStartConvCmd(ADC1, ENABLE);//¿aê¼×a»»
}
void DMA1_Channel1_IRQHandler(void)
{
u8 i;
if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET){
ADC_Cmd(ADC1,DISABLE);
ADC_SoftwareStartConvCmd(ADC1,DISABLE);
DMA_Cmd(DMA1_Channel1,DISABLE);
for(i=0;i<12;i++){
printf("(%d):%d ",i,ADC_Val);
delay_ms(100);
}
printf("\n");
DMA_Cmd(DMA1_Channel1,ENABLE);
ADC_Cmd(ADC1,ENABLE);
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
DMA_ClearFlag(DMA1_FLAG_TC1);
}
J++;
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
DMA_ClearFlag(DMA1_FLAG_TC1);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
采集到的数据很异常,前6个值远远大于1024,后面6个位0,如果将DMA_InitStructure.DMA_BufferSize=12,改为DMA_InitStructure.DMA_BufferSize=24;则12个数全部远远大于4096.
|
|