40-pin IO Development

Experiment 01 - GPIO Output (LED Blink)

Hardware Connection

Connect the LED to the VCC, GND, and IO37 of the RDK-X5 board.

Software Execution

Enter the user home directory and run:

cd user
sudo python3 ./LED_out.py

Terminal output:

You will see the LED start blinking at one-second intervals.

#!/usr/bin/env python3
import sys
import signal
import Hobot.GPIO as GPIO
import time

def signal_handler(signal, frame):
    sys.exit(0)

# 定义使用的GPIO通道为37
output_pin = 37 # BOARD 编码 37

def main():
    # 设置管脚编码模式为硬件编号 BOARD
    GPIO.setmode(GPIO.BOARD)
    # 设置为输出模式，并且初始化为高电平
    GPIO.setup(output_pin, GPIO.OUT, initial=GPIO.HIGH)
    # 记录当前管脚状态
    curr_value = GPIO.HIGH
    print("Starting demo now! Press CTRL+C to exit")
    try:
        # 间隔1秒时间，循环控制LED灯亮灭
        while True:
            time.sleep(1)
            GPIO.output(output_pin, curr_value)
            curr_value ^= GPIO.HIGH
    finally:
        GPIO.cleanup()

if __name__=='__main__':
    signal.signal(signal.SIGINT, signal_handler)
    main()