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- --- 模块功能:GPS辅助定位以及星历更新服务.
- -- 本功能模块只能配合Air820UX系列的模块以及Air530H模块,和芯星通GPS芯片使用;
- -- require"agpsHxxt"后,会自动开启本功能模块的任务;
- -- 会定期更新GPS星历,星历更新算法如下:
- -- 从最后一次GPS定位成功的时间算起,每隔4小时连接星历服务器下载一次星历数据(大概4K字节),写入GPS芯片。
- -- 例如01:00分开机后,更新了一次星历文件,截止到05:00,“一直没有开启过GPS”或者“开启过GPS,但是GPS从来没有定位成功”,在05:00就会下载星历数据然后写入GPS芯片;
- -- 05:00更新星历数据后,在06:00打开了GPS,并且GPS定位成功,然后在07:00关闭了GPS,关闭前GPS仍然处于定位成功状态;
- -- 截止到11:00,“一直没有开启过GPS”或者“开启过GPS,但是GPS从来没有定位成功”,在11:00就会下载星历数据然后写入GPS芯片;
- -- @module agpsHxxt
- -- @author openLuat
- -- @license MIT
- -- @copyright openLuat
- -- @release 2020.10.28
- require"http"
- require"lbsLoc"
- require"net"
- local gps = require"gpsHxxt"
- module(..., package.seeall)
- local EPH_TIME_FILE = "/ephTime.txt"
- local EPH_DATA_FILE = "/ephData.bin"
- local sEphData
- local EPH_UPDATE_INTERVAL = 3*3600
- local lastLbsLng,lastLbsLat = "",""
- local function runTimer()
- sys.timerStart(updateEph,EPH_UPDATE_INTERVAL*1000)
- end
- local function writeEphEnd()
- log.info("agpsHxxt.writeEphEnd")
- sys.timerStart(gps.close,3000,gps.TIMER,{tag="lib.agpsHxxt.lua.eph"})
- sEphData = nil
- end
- local function writeEph()
- log.info("agpsHxxt.writeEph")
- gps.writeData(sEphData)
- --gps.writeData(io.readFile("/lua/aid_data.bin"))
- --uart.setup(2, 9600, 8, uart.PAR_NONE, uart.STOP_1)
- --uart.write(2,io.readFile("/lua/aid_data.bin"))
- writeEphEnd()
- end
- local function downloadEphCb(result,prompt,head,body)
- log.info("agpsHxxt.downloadEphCb",result,prompt)
- runTimer()
- if result and prompt=="200" and body then
- io.writeFile(EPH_DATA_FILE,body)
- io.writeFile(EPH_TIME_FILE,tostring(os.time()))
- if gps.isFix() then
- -- io.writeFile(EPH_TIME_FILE,tostring(os.time()))
- else
- sEphData = body
- gps.open(gps.TIMER,{tag="lib.agpsHxxt.lua.eph",val=10,cb=writeEphEnd})
- sys.timerStart(writeEph,2000)
- return
- end
- end
- end
- --连接服务器下载星历
- function updateEph()
- if gps.isFix() then runTimer() return end
- http.request("GET","download.openluat.com:80/9501-xingli/HXXT_GPS_BDS_AGNSS_DATA.dat",nil,nil,nil,20000,downloadEphCb)
- end
- --JWL在星历的时间范围内,如果有星历文件,重启模块就直接把本地的星历文件写入GPS芯片
- --在AGPS_LOCATED 的订阅事件中,调用此接口。
- function upd_xingli()
- if not gps.isFix() then
- local lstm = io.readFile(EPH_TIME_FILE)
- if not lstm or lstm=="" then return end
- log.info("agpsHxxt.upd_xingli lstm=",lstm)
- if os.time()-tonumber(lstm) < EPH_UPDATE_INTERVAL then
- local body = io.readFile(EPH_DATA_FILE)
- if body and #body >0 then
- log.info("agpsHxxt.upd_xingli length=",#body)
- sEphData = body
- gps.open(gps.TIMER,{tag="lib.agpsHxxt.lua.eph",val=10,cb=writeEphEnd})
- sys.timerStart(writeEph,2000)
- else
- log.info("agpsHxxt.upd_xingli wanto update xingli data")
- updateEph()
- end
- end
- end
- end
- --检查是否需要更新星历
- local function checkEph()
- local result
- if not gps.isFix() then
- lastTm = io.readFile(EPH_TIME_FILE)
- if not lastTm or lastTm=="" then return true end
- log.info("agpsHxxt.checkEph",os.time(),tonumber(lastTm)," DELTA=",os.time()-tonumber(lastTm))
- result = (os.time()-tonumber(lastTm) >= EPH_UPDATE_INTERVAL)
- end
- if not result then runTimer() end
- return result
- end
- local function setFastFix(lng,lat,tm)
- gps.setFastFix(lat,lng,tm)
- if checkEph() then updateEph()end
- end
- local getloc = 0
- local lbsLocRequesting
- --获取到基站对应的经纬度,写到GPS芯片中
- local function getLocCb(result,lat,lng,addr,time)
- log.info("agpsHxxt.getLocCb",result,lat,lng,time and time:len() or 0)
- lbsLocRequesting = false
- if result==0 then
- lastLbsLng,lastLbsLat = lng,lat
- if not gps.isFix() then
- local tm = {year=0,month=0,day=0,hour=0,min=0,sec=0}
- if time:len()==6 then
- tm = {year=time:byte(1)+2000,month=time:byte(2),day=time:byte(3),hour=time:byte(4),min=time:byte(5),sec=time:byte(6)}
- misc.setClock(tm)
- tm = common.timeZoneConvert(tm.year,tm.month,tm.day,tm.hour,tm.min,tm.sec,8,0)
- end
- gps.open(gps.TIMERORSUC,{tag="lib.agpsHxxt.lua.fastFix",val=4})
- sys.timerStart(setFastFix,2000,lng,lat,tm)
- getloc = 1
- end
- end
- if result~=0 or gps.isFix() then
- if checkEph() then updateEph() end
- end
- end
- --是否获取到基站对应的经纬度
- function isgetloc()
- return getloc
- end
- local function ipReady()
- if gps.isFix() then
- runTimer()
- else
- if not lbsLocRequesting then
- lbsLocRequesting = true
- lbsLoc.request(getLocCb,nil,30000,"0","bs.openluat.com","12412",true)
- end
- log.info("agpsHxxt.ipready to updateEph")
- if checkEph() then
- updateEph()
- else
- sys.timerStart(upd_xingli,3000)
- end
- end
- end
- local function gpsState(evt,para)
- log.info("agpsHxxt.GPS_STATE",evt,para)
- if evt=="LOCATION_SUCCESS" or (evt=="CLOSE" and para==true) then
- runTimer()
- elseif evt=="OPEN" then
- local lng,lat = gps.getLastLocation()
- if lng=="" or lat=="" then
- lng,lat = lastLbsLng,lastLbsLat
- end
- if lng~="" and lat~="" then
- gps.open(gps.TIMERORSUC,{tag="lib.agpsHxxt.lua.fastFix",val=4})
- local tm = os.date("*t")
- sys.timerStart(gps.setFastFix,2000,lat,lng,common.timeZoneConvert(tm.year,tm.month,tm.day,tm.hour,tm.min,tm.sec,8,0))
- end
- end
- end
- function init()
- sys.subscribe("GPS_STATE",gpsState)
- sys.subscribe("IP_READY_IND",ipReady)
- log.info("agpsHxxt.init")
- end
- function unInit()
- sys.unsubscribe("GPS_STATE",gpsState)
- sys.unsubscribe("IP_READY_IND",ipReady)
- log.info("agpsHxxt.unInit")
- end
- init()
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