基本用法

import pyb

adc = pyb.ADC(Pin('Y11')) # create an analog object from a pin adc = pyb.ADC(pyb.Pin.board.Y11) val = adc.read() # read an analog value adc = pyb.ADCAll(resolution) # creale an ADCAll object val = adc.read_channel(channel) # read the given channel val = adc.read_core_temp() # read MCU temperature val = adc.read_core_vbat() # read MCU VBAT val = adc.read_core_vref() # read MCU VREF pyb.ADC（pin）

通过GPIO定义一个ADC

pyb.ADCAll(resolution)

定义ADC的分辨率，可以设置为8/10/12

adc.read() 读取adc的值，返回值与adc分辨率有关，8位最大255，10位最大1023，12位最大4095

adc.read_channel(channel)

读取指定adc通道的值

adc.read_core_temp()

读取内部温度传感器

adc.read_core_vbat()

读取vbat电压 vback = adc.read_core_vbat() * 1.21 / adc.read_core_vref()

adc.read_core_vref()

读取vref电压（1.21V参考） 3V3 = 3.3 * 1.21 / adc.read_core_vref()

adc.read_timed(buf, timer)

以指定频率读取adc参数到buf buf，缓冲区 timer，频率（Hz）

使用这个函数会将ADC的结果限制到8位

adc = pyb.ADC(pyb.Pin.board.X19) # create an ADC on pin X19 buf = bytearray(100) # create a buffer of 100 bytes adc.read_timed(buf, 10) # read analog values into buf at 10Hz #this will take 10 seconds to finish for val in buf: # loop over all values print(val) # print the value out