[嵌入式学习日志]STM32使用ADC进行DMA传输时的程序卡死bug

最新推荐文章于 2024-11-16 16:26:32 发布

原创

最新推荐文章于 2024-11-16 16:26:32 发布 · 1.4k 阅读

4 ·

CC 4.0 BY-SA版权

文章标签：

#学习 #stm32 #bug #c语言 #嵌入式硬件

文章讨论了在使用ADC和DMA时，如果配置不当可能导致程序因ADC读取速度过快和DMA传输频繁而卡死的问题。通过调整预分频和增加数据长度来降低ADC和DMA的同步频率是解决方法。

ADC-continous + DMA导致程序卡死的情况

涉及函数:

/**
  * @brief  Enable ADC, start conversion of regular group and transfer result through DMA.
  * @note   Interruptions enabled in this function:
  *         overrun (if applicable), DMA half transfer, DMA transfer complete.
  *         Each of these interruptions has its dedicated callback function.
  * @note   Case of multimode enabled (when multimode feature is available): HAL_ADC_Start_DMA()
  *         is designed for single-ADC mode only. For multimode, the dedicated
  *         HAL_ADCEx_MultiModeStart_DMA() function must be used.
  * @param hadc ADC handle
  * @param pData Destination Buffer address.
  * @param Length Number of data to be transferred from ADC peripheral to memory
  * @retval HAL status.
  */
HAL_ADC_Start_DMA(ADC_Han