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() ...
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...
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...
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...
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、...
init(freq=2.5, mode=Timer.PERIODIC, callback=tick) 这块板子的强悍的性能有很多可玩的地方,官方也提供了很多例子 比如说这个PWM呼吸灯例子 # Example using PWM to fade an LED. import time from machine import Pin, PWM # Construct PWM object, with LED on Pin(0). pwm = PWM(Pin(0)) # Set ...
buttonA.wasReleased(callback=None) buttonA.releasedFor(timeout, callback=None) Example Loop: fromm5stackimport*importutimewhileTrue:ifbuttonA.wasPressed(): lcd.print('Button A was Pressed\n')ifbuttonA.wasReleased(): lcd.print('Button A was Released\n')ifbuttonA.pressedFor(1.5): ...
In each case the integer values must be multiplied by the scaling to give the units specified. In all cases other than quaternion (QUAT_DATA) theigetmethod sets.wto zero. Example usage: defcb(t):imu.iget(ACC_DATA)print(imu.w,imu.x,imu.y,imu.z)t=pyb.Timer(1,period=200,callback=...
For example, lvgl.SYMBOL is an "enum" of symbol strings, lvgl.anim_create will create animation etc. Callbacks In C a callback is a function pointer. In MicroPython we would also need to register a MicroPython callable object for each callback. Therefore in the MicroPython binding we need ...