4-学习GPRS_Air202(串口)

时间：2018-05-21 10:19:59 阅读：463 评论：0 收藏：0 [点我收藏+]

实现的功能

技术分享图片

有人会想,不就是个串口接收到什么就会什么的程序嘛!!!!!!!!!!!!!!有什么好说的!!

实现此功能的程序是很多,但是,但是,但是.....我写的程序更注重于开发和实用,不信往下看

先贴出来程序,,,

module(...,package.seeall)

local function print(...)
    _G.print(...)
end

print("dofile usart.lua................................................");

local UART_ID = 1 --uart1
local uartReadData = "";
local uartReadDataCopy = "";
local uartReadDataCnt = 0;
local uartReadDataCntCopy = 0;

--定时器空闲中断检测10ms
local function TimerFunc4()
       if  uartReadDataCnt ~= 0 then
        uartReadDataCnt = 0;
        uartReadDataCntCopy = 0;
        uartReadDataCopy = uartReadData;
        uartReadData = "";
        uart.write(UART_ID,uartReadDataCopy)
       else
            uartReadDataCntCopy = uartReadDataCnt;
       end
end
sys.timer_loop_start(TimerFunc4,10)


--读取串口接收到的数据
local function read()
    local data = ""
    while true do
        data = uart.read(UART_ID,"*l",0)
        if not data or string.len(data) == 0 then break end
        uartReadData = uartReadData..data;
        uartReadDataCnt = uartReadDataCnt +1
    end
end

pm.wake("wake")
--注册串口的数据接收函数，串口收到数据后，会以中断方式，调用read接口读取数据
sys.reguart(UART_ID,read)
--配置并且打开串口
uart.setup(UART_ID,115200,8,uart.PAR_NONE,uart.STOP_1)