K210_MaixPy IDE peripheral development five timer TIM

Development board: K210 AIRV R3 version widora

Development environment: MaixPy IDE silicon speed home

Required reference sites:

https://cn.maixpy.sipeed.com/zh/api_reference/Maix/fpioa.html

https://cn.maixpy.sipeed.com/zh/api_reference/Maix/gpio.html

https://cn.maixpy.sipeed.com/zh/api_reference/machine/timer.html

 

Create a new file in the same way, _4tim.py

The code uses the previous section, and only keeps the LED-related configuration

Call the timer first

from machine import Timer

See how to configure the timer

class machine.Timer(id, channel, mode=Timer.MODE_ONE_SHOT, 
    period=1000, unit=Timer.UNIT_MS, callback=None, 
    arg=None, start=True, priority=1, div=0)

 

Timing 300ms

tim1 = Timer(Timer.TIMER0,  Timer.CHANNEL0,
    mode=Timer.MODE_PERIODIC,period=300,
    callback=on_timer, arg=on_timer,start=False)

id: Timer.TIMER0 #Timer 0

channel: Timer.CHANNEL0, #channel 0

mode:

• MODE_ONE_SHOT: Timer runs only once (callback once)
• MODE_PERIODIC: Timer always runs (continuous callback)
• MODE_PWM: The timer is not used as a callback function to generate PWM

period: timing period

unit is not filled, the default is ms milliseconds

callback callback function on_timer 

arg callback function parameters

start=False I started it manually, I don’t need to start it automatically

 

Similarly, like the button, flash the LED light on the timer callback function

def on_timer(timer):
    global i
    if(i==0):
        i=1
    else :
        i=0
    print("time up:", timer)
    led1.value(i)

Then start the TIM1 timer

tim1.start()

The overall code is as follows

import utime
from Maix import FPIOA
from Maix import GPIO
from machine import Timer

def on_timer(timer):
    global i
    if(i==0):
        i=1
    else :
        i=0
    print("time up:", timer)
    led1.value(i)

fpioa = FPIOA()
fpioa.set_function(17,fpioa.GPIOHS0)
fpioa.set_function(18,fpioa.GPIOHS1)

led1 = GPIO(GPIO.GPIOHS0,GPIO.OUT)
led2 = GPIO(GPIO.GPIOHS1,GPIO.OUT)

led1.value(0)
led2.value(0)

tim1 = Timer(Timer.TIMER0,  Timer.CHANNEL0,
    mode=Timer.MODE_PERIODIC,period=300,
    callback=on_timer, arg=on_timer,start=False)

global i
i=0
tim1.start()

After the code is typed, connect to the development board and run

 

Phenomenon: Just one LED light keeps flashing (300ms)