STM32F7xx 系列 ADC 的 HAL 驱动存在问题：HAL_ADC_Start_IT() 函数里没有适配 ADC2 外设软件触发启动的判断分支。
对应代码从 1128 行开始：
else
{
/* if instance of handle correspond to ADC1 and no external trigger present enable software conversion of regular channels */
if((hadc->Instance == ADC1) && ((hadc->Instance->CR2 & ADC_CR2_EXTEN) == RESET))
{
/* Enable the selected ADC software conversion for regular group */
hadc->Instance->CR2 |= (uint32_t)ADC_CR2_SWSTART;
}
/* if dual mode is selected, ADC3 works independently. */
/* check if the mode selected is not triple */
if( HAL_IS_BIT_CLR(ADC->CCR, ADC_CCR_MULTI_4) )
{
/* if instance of handle correspond to ADC3 and no external trigger present enable software conversion of regular channels */
if((hadc->Instance == ADC3) && ((hadc->Instance->CR2 & ADC_CR2_EXTEN) == RESET))
{
/* Enable the selected ADC software conversion for regular group */
hadc->Instance->CR2 |= (uint32_t)ADC_CR2_SWSTART;
}
}
我认为该函数理应加入 ADC2 的判断逻辑，但这份驱动源码中没有对 ADC2 做任何处理。
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