DMA很好用的。
把DMA开成循环模式，ADC用扫描+持续方式；什么时候想要ADC数据了，直接从数组往出读就可以了。除了有点浪费DMA时间和费点电之外，很省事。
- /**
- * @brief DMA1 channel1 configuration
- * @param None
- * @retval None
- */
- void DMA1_Configuration(void)
- {
- /* DMA1 channel1 configuration ----------------------------------------------*/
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
- DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC1ConvertedValue;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = 64;
- 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);
- /* Enable DMA1 channel1 */
- DMA_Cmd(DMA1_Channel1, ENABLE);
- }
- /**
- * @brief ADC1 configuration
- * @param None
- * @retval None
- */
- void ADC1_Configuration(void)
- {
- /* ADC1 configuration ------------------------------------------------------*/
- ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
- ADC_InitStructure.ADC_ScanConvMode = ENABLE;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_NbrOfChannel = 4;
- ADC_Init(ADC1, &ADC_InitStructure);
- /* ADC1 regular channels configuration */
- ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_239Cycles5);
- ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 2, ADC_SampleTime_239Cycles5);
- ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 3, ADC_SampleTime_239Cycles5);
- ADC_RegularChannelConfig(ADC1, ADC_Channel_17, 4, ADC_SampleTime_239Cycles5);
- /* Enable ADC1 DMA */
- ADC_DMACmd(ADC1, ENABLE);
- /* Enable ADC1 */
- ADC_Cmd(ADC1, ENABLE);
- /* Tsensor Vref ENABLE */
- ADC_TempSensorVrefintCmd(ENABLE);
- /* 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));
- /* Start ADC1 Software Conversion */
- ADC_SoftwareStartConvCmd(ADC1, ENABLE);
- }
[color=rgb(51, 102, 153) !important]复制代码
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