基本 array VR log emp into str 緩沖 second

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）

通過GPIO定義一個ADC
pyb.ADCAll(resolution)

定義ADC的分辨率，可以設置為8/10/12
adc.read()
讀取adc的值，返回值與adc分辨率有關，8位最大255，10位最大1023，12位最大4095

adc.read_channel(channel)
讀取指定adc通道的值

adc.read_core_temp()

讀取內部溫度傳感器

adc.read_core_vbat()
讀取vbat電壓
vback = adc.read_core_vbat() * 1.21 / adc.read_core_vref()

adc.read_core_vref()
讀取vref電壓（1.21V參考）
3V3 = 3.3 * 1.21 / adc.read_core_vref()

adc.read_timed(buf, timer)
以指定頻率讀取adc參數到buf
buf，緩沖區
timer，頻率（Hz）

使用這個函數會將ADC的結果限制到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

Micropython TPYBoard ADC的使用方法