学习了官方的点灯方法, 接着我们自己实现流水灯效果. 使用全部的引脚作为输出, 为了方便使用排阻限流, 使用十个一组的指示灯,共计三组(其中有4盏灯因为Pico引脚不足, 不能点亮). 因为Raspberry Pi Pico只引出了26个GPIO引脚, 所以不加其它芯片的情况下,最多只能点亮26盏灯. (其中GPIO引脚连接的是板载LED), 还有一个A3连接的是温度传感器.
import time
import board
import digitalio
led0 = digitalio.DigitalInOut(board.GP0)
led1 = digitalio.DigitalInOut(board.GP1)
led2 = digitalio.DigitalInOut(board.GP2)
led3 = digitalio.DigitalInOut(board.GP3)
led4 = digitalio.DigitalInOut(board.GP4)
led5 = digitalio.DigitalInOut(board.GP5)
led6 = digitalio.DigitalInOut(board.GP6)
led7 = digitalio.DigitalInOut(board.GP7)
led8 = digitalio.DigitalInOut(board.GP8)
led9 = digitalio.DigitalInOut(board.GP9)
led10 = digitalio.DigitalInOut(board.GP10)
led11 = digitalio.DigitalInOut(board.GP11)
led12 = digitalio.DigitalInOut(board.GP12)
led13 = digitalio.DigitalInOut(board.GP13)
led14 = digitalio.DigitalInOut(board.GP14)
led15 = digitalio.DigitalInOut(board.GP15)
led16 = digitalio.DigitalInOut(board.GP16)
led17 = digitalio.DigitalInOut(board.GP17)
led18 = digitalio.DigitalInOut(board.GP18)
led19 = digitalio.DigitalInOut(board.GP19)
led20 = digitalio.DigitalInOut(board.GP20)
led21 = digitalio.DigitalInOut(board.GP21)
led22 = digitalio.DigitalInOut(board.GP22)
led26 = digitalio.DigitalInOut(board.GP26)
led27 = digitalio.DigitalInOut(board.GP27)
led28 = digitalio.DigitalInOut(board.GP28)
leds=[led0,led1,led2,led3,led4,led5,led6,led7,led8,led9,led10,led11,led12,led13,led14,led15,led16,led17,led18,led19,led20,led21,led22,led26,led27,led28]
for i in range(26):
leds[i].direction = digitalio.Direction.OUTPUT
while True:
for i in range(26): #正向移动
leds[i].value = True
time.sleep(0.1)
leds[i].value = False
time.sleep(0.1)
for i in range(24,1,-1): #回滚
leds[i].value = True
time.sleep(0.1)
leds[i].value = False
time.sleep(0.1)
这里还可以实现各种花式的流水灯效果.
