GPIO — 控制I/O引脚

类

class GPIO(...)

使用示例::(python)

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# coding=utf-8
# This is a sample Python script.
import utime
from driver import GPIO

print("start led test")
gpio = GPIO()
leds=("led1", "led2", "led3", "led4", "led5")
for i in range(5):
    for led in leds:
        gpio.open(led)
        gpio.write(1)
        utime.sleep_ms(200)
        gpio.write(0)
        utime.sleep_ms(200)
        gpio.write(1)
        utime.sleep_ms(200)
        gpio.close()

print("end led test")

配置信息::(json)

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# coding=utf-8
# This is a sample cjson file.
{
    "version": "1.0.0",
    "io": {
        "led1": {
            "type": "GPIO",
            "port": 34,
            "dir": "output",
            "pull": "pullup"
        },
        "led2": {
            "type": "GPIO",
            "port": 35,
            "dir": "output",
            "pull": "pullup"
        },
        "led3": {
            "type": "GPIO",
            "port": 36,
            "dir": "output",
            "pull": "pullup"
        },
        "led4": {
            "type": "GPIO",
            "port": 40,
            "dir": "output",
            "pull": "pullup"
        },
        "led5": {
            "type": "GPIO",
            "port": 41,
            "dir": "output",
            "pull": "pullup"
        }
    },
    "debugLevel": "DEBUG"
}

操作函数

open(jsonConfigPath, type)

打开并根据json文件配置GPIO实例

close()

关闭GPIO实例

read()

读取GPIO电平值，输入模式和输出模式时均可用

write(value)

设置GPIO电平值，GPIO引脚为输出模式时可用

toggle()

切换GPIO的电平，当前GPIO电平为低电平时设置为高电平，当前GPIO电平为高电平时设置为低电平