stm32hal库adc+dma 多通道采集数据
时间: 2023-05-23 15:02:26 浏览: 516
可以通过DMA和ADC多通道同时采集数据。以下是示例代码:
首先,启用DMA和ADC:
```c
__HAL_RCC_DMA1_CLK_ENABLE();
__HAL_RCC_ADC1_CLK_ENABLE();
DMA_HandleTypeDef hdma_adc;
ADC_HandleTypeDef hadc;
void MX_DMA_Init(void)
{
hdma_adc.Instance = DMA1_Channel1;
hdma_adc.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_adc.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_adc.Init.MemInc = DMA_MINC_ENABLE;
hdma_adc.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
hdma_adc.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
hdma_adc.Init.Mode = DMA_CIRCULAR;
hdma_adc.Init.Priority = DMA_PRIORITY_HIGH;
HAL_DMA_Init(&hdma_adc);
__HAL_LINKDMA(&hadc, DMA_Handle, hdma_adc);
}
void MX_ADC1_Init(void)
{
hadc.Instance = ADC1;
hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
hadc.Init.Resolution = ADC_RESOLUTION_12B;
hadc.Init.ScanConvMode = ENABLE;
hadc.Init.ContinuousConvMode = ENABLE;
hadc.Init.DiscontinuousConvMode = DISABLE;
hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hadc.Init.NbrOfConversion = 3;
HAL_ADC_Init(&hadc);
}
```
接下来,为每个通道启用DMA:
```c
uint16_t ADC_Buffer[3];
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
// 转换完成时的回调
}
void MX_ADC_DMA_Config(void)
{
HAL_ADC_Start_DMA(&hadc, (uint32_t*)ADC_Buffer, 3);
}
```
现在,您可以使用ADC_Buffer `[0],ADC_Buffer [1],ADC_Buffer [2]` 存储来自ADC转换的多个通道的值。
希望这可以帮助您!
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