用STM32的AD读取外部模拟输入,可以连在光敏组和热敏电阻上,熟悉了解AD和DMA的正确配置 ,现象： 当有电压改变时，数码管显示当前的电压值-AD with the STM32 read external analog inputs can be connected to the photosensitive group and thermistor, become familiar with the correct configuration of AD and DMA , Phe