看官方的固件库,里面有ADC的代码,加上个定时器就可以实现.下面代码是抄过来的,你能看懂吗?
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- __IO uint16_t ADC1ConvertedValue = 0, ADC1ConvertedVoltage = 0;
- __IO uint16_t RegularConvData_Tab[4];
- void ADC1_DMA_Config(void)
- {
- ADC_InitTypeDef ADC_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- DMA_InitTypeDef DMA_InitStructure;
- /* ADC1 DeInit */
- ADC_DeInit(ADC1);
-
- /* GPIOC Periph clock enable */
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
-
- /* ADC1 Periph clock enable */
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
-
- /* DMA1 clock enable */
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
-
- /* Configure ADC Channel11 as analog input */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 ;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
- GPIO_Init(GPIOC, &GPIO_InitStructure);
-
- /* DMA1 Channel1 Config */
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
- DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)RegularConvData_Tab;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = 4;
- 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);
- /* DMA1 Channel1 enable */
- DMA_Cmd(DMA1_Channel1, ENABLE);
-
- /* ADC DMA request in circular mode */
- ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
-
- /* Enable ADC_DMA */
- ADC_DMACmd(ADC1, ENABLE);
-
- /* Initialize ADC structure */
- ADC_StructInit(&ADC_InitStructure);
-
- /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits */
- ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
- ADC_Init(ADC1, &ADC_InitStructure);
- /* Convert the ADC1 Channel 1 with 55.5 Cycles as sampling time */
- ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_55_5Cycles);
-
-
- /* Convert the ADC1 temperature sensor with 55.5 Cycles as sampling time */
- ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
- ADC_TempSensorCmd(ENABLE);
-
- /* Convert the ADC1 Vref with 55.5 Cycles as sampling time */
- ADC_ChannelConfig(ADC1, ADC_Channel_Vrefint , ADC_SampleTime_55_5Cycles);
- ADC_VrefintCmd(ENABLE);
-
- /* Convert the ADC1 Vbat with 55.5 Cycles as sampling time */
- ADC_ChannelConfig(ADC1, ADC_Channel_Vbat , ADC_SampleTime_55_5Cycles);
- ADC_VbatCmd(ENABLE);
-
- /* ADC Calibration */
- ADC_GetCalibrationFactor(ADC1);
-
- /* Enable ADC1 */
- ADC_Cmd(ADC1, ENABLE);
-
- /* Wait the ADCEN falg */
- while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));
-
- /* ADC1 regular Software Start Conv */
- ADC_StartOfConversion(ADC1);
- }
|