Air724ugLora/demo/socket/sync/sendWaitRecv/longConnectionTransparent/mcuUart.lua

--- 模块功能：MCU和Air模块串口透传通信.
-- Air模块的串口接收到1024字节的数据，或者接收数据后超时1秒钟不再收到数据，则透传给服务器
--
-- 服务器下发的数据，通过服务器直接透传给MCU
-- @author openLuat
-- @module socketLongConnectionTrasparent.mcuUart
-- @license MIT
-- @copyright openLuat
-- @release 2018.03.30

module(...,package.seeall)

require"pm"

local uartID = 2

local function taskRead()
    local cacheData = ""
    while true do
        local s = uart.read(uartID,"*l")
        if s == "" then
            uart.on(uartID,"receive",function() sys.publish("UART_RECEIVE") end)
            if not sys.waitUntil("UART_RECEIVE",1000) then
                sys.publish("UART_RECV_DATA",cacheData:sub(1,1024))
                cacheData = cacheData:sub(1025,-1)
            end
            uart.on(uartID,"receive")
        else
            cacheData = cacheData..s
            if cacheData:len()>=1024 then
                sys.publish("UART_RECV_DATA",cacheData:sub(1,1024))
                cacheData = cacheData:sub(1025,-1)
            end
        end
    end
end

local function socketRecvData(data)
    uart.write(uartID,data)
end


pm.wake("mcuUart.lua")
uart.setup(uartID,115200,8,uart.PAR_NONE,uart.STOP_1)
sys.taskInit(taskRead)

sys.subscribe("SOCKET_RECV_DATA",socketRecvData)