Question

import pigpio
import time

start=time.time()

#setting up the IO
pi=pigpio.pi()
pi.hardware_clock(4,6400) #Setting GPIO4 as 6.4kHz clock

pi.set_mode(17,pigpio.INPUT)#GPIO17 as input
pi.set_mode(27,pigpio.INPUT)#GPIO27 as input
pi.set_mode(22,pigpio.INPUT)#GPIO22 as input
pi.set_mode(10,pigpio.INPUT)#GPIO10 as input
pi.set_mode(9,pigpio.INPUT)#GPIO9 as input
pi.set_mode(11,pigpio.INPUT)#GPIO11 as input
pi.set_mode(5,pigpio.INPUT)#GPIO5 as input
pi.set_mode(6,pigpio.INPUT)#GPIO6 as input


count=0

def readUnoOutput(gpio, level, tick):
    global count
    global start

    if count==0:
        start=time.time()

    count=count+1

    if count==128:
        end=time.time()

        timepersample= (end-start)/128
        samplerate= 1/timepersample

        print (end-start)
        print samplerate

#Set up GPIO callback
cb1=pi.callback(4, pigpio.RISING_EDGE, readUnoOutput)

大家好，

我使用pigpio库在6.4kHz的GPIO 4上产生时钟信号，然后在回调函数中使用该时钟脉冲，该函数应在每个上升沿调用该计数器，我们称之为样本。所以通过我的计算6400/128 = 50并且采样率应该是6400.我得到28058.似乎很简单无法弄明白。

谢谢

python raspberrypi gpio时钟数据读取

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