start1=Timer(1,freq=10000,callback=start) stop1=Timer(4,freq=2,callback=stop) #小车左转 def left(): x1.high() x2.low() y1.high() y2.low() #小车前进 def go(): x1.high() x2.low() y1.low() y2.high() #小车后退 def back(): x1.low() x2.high() y1.high() y2...
callback(None) # clear callback 注意: Timer(1) 被使用于摄像头。同样,Timer(5) 控制伺服驱动器,Timer(6) 用于定时 ADC/DAC 读写。建议在您的程序中使用其他定时器。注意: 在回调期间(中断期间)无法分配内存,因此在回调中引发的异常不会提供太多信息。请参阅 micropython.alloc_emergency_exception_buf() ...
tim=pyb.Timer(4)# create a timer object using timer 4tim.init(freq=2)# trigger at 2Hztim.callback(lambdat:pyb.LED(1).toggle()) Example using named function for the callback: deftick(timer):# we will receive the timer object when being calledprint(timer.counter())# show current tim...
run=1 start1=Timer(1,freq=10000,callback=start) stop1=Timer(4,freq=2,callback=stop) sizecc = [35,36,37,38,39,40,41,42,43,44,45,46,47]#280-47 -5 while True: if(run==1): Trig.value(1) pyb.udelay(100) Trig.value(0) while(Echo.value()==0): Trig.value(1) pyb.udelay...
ntp_timer = Timer(1) ntp_timer.init(period=1000 * 60 * 60 * 7, mode=Timer.PERIODIC, callback=ntp_sync) ntptime.host随便指向某个公开的ntpserver,比如aliyun的http://ntpX.aliyun.com,1-9应该都可以。 ntptime.settime()后通过RTC().datetime()就可获取当前时钟信息,返回8元组(年、月、日、...
frommachineimportPin,Timerled=Pin(25,Pin.OUT)tim=Timer()deftick(timer):globalledled.toggle()tim.init(freq=2.5,mode=Timer.PERIODIC,callback=tick) 将文件保存到到pico里面,并写好文件名 我们运行一下看下效果,这里用的是板载的LED灯,我们可以看到板子上的LED灯在闪烁 ...
Example of Timer Timing period output 1 from machine import Timer tim = Timer(-1) def func(t): print (1) tim.init(period=2000, mode=Timer.PERIODIC, callback=func) Timing one-time output 2 from machine import Timer tim = Timer(-1) def func(t): print(2) tim.init(period=2000, mod...
Use the machine.Timer class with timer ID of -1: from machine import Timer tim = Timer(-1) tim.init(period=5000, mode=Timer.ONE_SHOT, callback=lambda t:print(1) tim.init(period=2000, mode=Timer.PERIODIC, callback=lambda t:print(2) The period is in milliseconds. 1.6 Pi 19、ns ...
It is possible to show simple icons, for example media playback symbols. callback=dolittle Callback function which runs when button is pressed. args=() A list/tuple of arguments for the above callback. Method: greyed_out Optional Boolean argument val=None. If None returns the current '...
.Pin(27)p1.init(p1.OUT)p1.value(1)deftcb(timer):globaltcounteriftcounter&1:p1.value(0)else:p1.value(1)tcounter+=1if(tcounter%10000)==0:print("[tcb] timer: {} counter: {}".format(timer.timernum(),tcounter))t1=machine.Timer(2)t1.init(period=20,mode=t1.PERIODIC,callback=...