- #==========================================================
- define ADC1_DR_Address ((u32)0x4001244C)
- vu16 AD_Value[2];
- ==============================================================
- 关键代码
- void ADC1_Configuration(void)
- {
- ADC_InitTypeDef ADC_InitStructure;
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_ScanConvMode = ENABLE;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //连续转换开启
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_NbrOfChannel = 2; //设置转换序列长度为2
- ADC_Init(ADC1, &ADC_InitStructure);
-
- //ADC内置温度传感器使能(要使用片内温度传感器,切忌要开启它)
- ADC_TempSensorVrefintCmd(ENABLE);
-
- //常规转换序列1:通道10
- ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_13Cycles5);
- //常规转换序列2:通道16(内部温度传感器),采样时间>2.2us,(239cycles)
- ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 2, ADC_SampleTime_239Cycles5);
-
- // Enable ADC1
- ADC_Cmd(ADC1, ENABLE);
- // 开启ADC的DMA支持(要实现DMA功能,还需独立配置DMA通道等参数)
- ADC_DMACmd(ADC1, ENABLE);
-
- // 下面是ADC自动校准,开机后需执行一次,保证精度
- // Enable ADC1 reset calibaration register
- ADC_ResetCalibration(ADC1);
- // Check the end of ADC1 reset calibration register
- while(ADC_GetResetCalibrationStatus(ADC1));
- // Start ADC1 calibaration
- ADC_StartCalibration(ADC1);
- // Check the end of ADC1 calibration
- while(ADC_GetCalibrationStatus(ADC1));
- // ADC自动校准结束---------------
-
- }
- /*******************************************************************************
- * Function Name : DMA_Configuration
- * Description : DMA设置:从ADC模块自动读转换结果至内存
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void DMA_Configuration(void)
- {
- DMA_InitTypeDef DMA_InitStructure;
-
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32)AD_Value; //AD_Value为数组地址
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- //BufferSize=2,因为ADC转换序列有2个通道
- //如此设置,使序列1结果放在AD_Value[0],序列2结果放在AD_Value[1]
- DMA_InitStructure.DMA_BufferSize = 2;
- 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;
- //循环模式开启,Buffer写满后,自动回到初始地址开始传输
- 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);
- //配置完成后,启动DMA通道
- DMA_Cmd(DMA1_Channel1, ENABLE);
- }
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