3.16 haas506开发教程-example-通过子线程检测串口指令数据

原创已于 2022-04-01 17:39:52 修改 · 525 阅读

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于 2022-04-01 17:37:11 首次发布

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该教程详细介绍了如何使用Haas506开发板进行串口数据处理。通过创建子线程，程序在主线程持续打印'helloworld'的同时，监听并解析串口助手发送的JSON格式数据，用于控制LED灯的状态。用户可以自定义输入指令，点亮或熄灭特定的LED灯。

3.16 haas506开发教程-example-通过子线程检测串口指令数据

1.简介
2.测试代码
3.测试结果

1.简介

本案例使用子线程对串口所发送的数据进行处理和执行相应的逻辑操作。

2.测试代码

main.py

在main.py中，先初始化haas506开发板上的led灯，然后开启子线程对串口助手发送过来的数据进行处理，最后在主线程中循环打印helloworld。

import utime as time
import app_led
import app_input

def main():
    app_led.led_init()
    #子线程检测数据输入
    app_input.start_input_cmd_thread()
    #主线程
    while True:
        time.sleep(1)
        #do something 
        #for example ,print helloworld
        print("hello world")

if __name__=="__main__":
    main()

app_led.py

在app_led.py中初始化led灯，以及执行点亮和熄灭操作。

from driver import GPIO

led1=GPIO()
led2=GPIO()
led3=GPIO()
led4=GPIO()
led5=GPIO()
led1.open('led1')
led2.open('led2')
led3.open('led3')
led4.open('led4')
led5.open("led5")


def led_init():
    led1.write(0)
    led2.write(0)
    led3.write(0)
    led4.write(0)
    led5.write(0)
    
def write(key,value):
    if key=="led1":
        led1.write(value)
    elif key=="led2":
        led2.write(value)
    elif key=="led3":
        led3.write(value)            
    elif key=="led4":
        led4.write(value)
    elif key=="led5":
        led5.write(value)
    else:
        print("please check cmd that you send")
        pass

app_input

在app_input.py中，先接收串口助手发送过来的json格式的数据，然后对该数据进行处理。

# -*- coding: UTF-8 -*-
import _thread
import ujson
import app_led


# data format :  {"led_ctrl":{"led1":1,"led2":1,"led3":1,"led4":1,"led5":1}}

def wait_input_cmd(id):
    while True:
        try:
            inputcmd = input('please input cmd:')
        except KeyboardInterrupt:
            _thread.exit()
        try:
            inputcmd_dict = ujson.loads(inputcmd)
            #判断所输入的数据 是否是字典格式
            if isinstance(inputcmd_dict,dict):
                #判断 "键led_ctrl" 所对应的"值"是否是字典格式
                if 'led_ctrl' in inputcmd_dict and isinstance(inputcmd_dict['led_ctrl'],dict):
                    for key,value in inputcmd_dict['led_ctrl'].items():
                        #修改led灯的电平值，实现点亮/熄灭led灯
                        app_led.write(key,value)
            else:
                print("cmd is not a dict")
                print(inputcmd_dict) 
        except ValueError:
            '''other cmd process'''
            print('input cmd is:' + inputcmd)
            pass
        finally:
            pass

def start_input_cmd_thread():
    _thread.start_new_thread(wait_input_cmd,(1,))

board.json

{
    "name": "haas506",
   "version": "1.0.0",
   "io": {
    "led1": {
      "type": "GPIO",
      "port": 0,
      "dir": "output",
      "pull": "pullup"
      },
  "led2": {
      "type": "GPIO",
      "port": 6,
      "dir": "output",
      "pull": "pullup"
      },
  "led3": {
      "type": "GPIO",
      "port": 7,
      "dir": "output",
      "pull": "pullup"
      },
  "led4": {
      "type": "GPIO",
      "port": 8,
      "dir": "output",
      "pull": "pullup"
      },
  "led5": {
      "type": "GPIO",
      "port": 9,
      "dir": "output",
      "pull": "pullup"
      },  
   "serial1":{
       "type":"UART",
       "port":0,
       "dataWidth":8,
       "baudRate":115200,
       "stopBits":1,
       "flowControl":"disable",
       "parity":"none"
       },
  "serial2":{
       "type":"UART",
       "port":1,
       "dataWidth":8,
       "baudRate":115200,
       "stopBits":1,
       "flowControl":"disable",
       "parity":"none"
       },
  "serial3":{
       "type":"UART",
       "port":2,
       "dataWidth":8,
       "baudRate":115200,
       "stopBits":1,
       "flowControl":"disable",
       "parity":"none"
       }
   },
   "debugLevel": "ERROR",
   "repl":"enable",
   "replPort":0
}