Example explanation-02-led_control LED control

# LED 控制例子
#
# 这个例子展示了如何控制你的OpenMV的内置的LED。使用你的手机才能看到红外IR LED。

import time
from pyb import LED

red_led   = LED(1)
green_led = LED(2)
blue_led  = LED(3)
ir_led    = LED(4)

def led_control(x):
    if   (x&1)==0: red_led.off()
    elif (x&1)==1: red_led.on()
    if   (x&2)==0: green_led.off()
    elif (x&2)==2: green_led.on()
    if   (x&4)==0: blue_led.off()
    elif (x&4)==4: blue_led.on()
    if   (x&8)==0: ir_led.off()
    elif (x&8)==8: ir_led.on()

while(True):
    for i in range(16):
        led_control(i)
        time.sleep_ms(500)

Function documentation for pyb.LED() in the pyb module: Xingtong Technology OpenMV official Chinese documentation function explanation:

The pyb module cannot be used on OpenMV RT, only the following machine module can be used:

# LED 控制例子
#
# 这个例子展示了如何控制你的OpenMV的内置的LED。
import time
from machine import LED

red_led = LED("LED_RED")
green_led = LED("LED_GREEN")
blue_led = LED("LED_BLUE")


def led_control(x):
    if (x & 1) == 0:
        red_led.off()
    elif (x & 1) == 1:
        red_led.on()
    if (x & 2) == 0:
        green_led.off()
    elif (x & 2) == 2:
        green_led.on()
    if (x & 4) == 0:
        blue_led.off()
    elif (x & 4) == 4:
        blue_led.on()


while True:
    for i in range(8):
        led_control(i)
        time.sleep_ms(500)

Using PWM to control LED lights on OpenMV RT:

# LED 控制例子
#
# 这个例子展示了如何控制你的OpenMV的内置的LED。

import time
from machine import PWM

r = PWM("LED_RED", freq=200, duty_u16=65535)
b = PWM("LED_BLUE", freq=200, duty_u16=65535)
g = PWM("LED_GREEN", freq=200, duty_u16=65535)


while True:
    for i in range(0, 65536, 256):
        r.duty_u16(65535 - i)
        time.sleep_ms(10)
    r.duty_u16(65535)

    for i in range(0, 65536, 256):
        g.duty_u16(65535 - i)
        time.sleep_ms(10)
    g.duty_u16(65535)

    for i in range(0, 65536, 256):
        b.duty_u16(65535 - i)
        time.sleep_ms(10)
    b.duty_u16(65535)