HAL_ADC_Start_DMA()
时间: 2023-09-02 15:06:49 浏览: 56
HAL_ADC_Start_DMA()函数是一个HAL库中的函数,用于启动DMA传输并开始ADC转换。它接受三个参数:ADC句柄、存储数据的缓冲区地址和转换的通道数。通过这个函数,可以配置并控制多路ADC转换,非常简单和方便。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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相关问题
HAL_ADC_START_DMA
引用和中的代码段显示了在STM32开发板上使用HAL库进行ADC数据采集的主函数代码。其中,`HAL_ADC_Start_DMA`是一个函数,用于启动DMA传输,并开始连续转换模式的ADC数据采集。
在引用的代码中,`HAL_ADC_Start_DMA(&hadc1,(uint32_t*)&AD_Value,5)`表示启动ADC1的DMA传输,并设置DMA传输的目标地址为`AD_Value`数组,传输5个数据。
在引用的代码中,`HAL_ADC_Start_DMA(&hadc1, (uint32_t *)AdcBuf, 15)`表示启动ADC1的DMA传输,并设置DMA传输的目标地址为`AdcBuf`数组,传输15个数据。
综上所述,`HAL_ADC_Start_DMA`函数用于启动ADC的DMA传输,并设置DMA传输的目标地址和传输长度。在调用该函数后,ADC将开始使用DMA进行连续转换模式的数据采集。
HAL_ADC_Start_DMA
HAL_ADC_Start_DMA is a function in the HAL library for STM32 microcontrollers that starts the ADC conversion process using DMA (Direct Memory Access).
When the ADC is started with DMA, the converted data is automatically transferred to a memory buffer without CPU intervention. This reduces the load on the CPU and allows for more efficient and faster data transfer.
The function takes as parameters the ADC handle (which specifies the ADC module to use), the memory buffer to store the converted data, the number of elements in the buffer, and the DMA transfer mode.
Here is an example usage of HAL_ADC_Start_DMA:
```
uint16_t adc_buffer[100];
HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buffer, 100);
```
This code starts the ADC conversion process using DMA with ADC module 1 and stores the converted data in the adc_buffer array. The array has 100 elements (assuming each conversion returns a 16-bit value).