1-Wire Weather Station *HELP*
Tom P
Posts: 97
---I need some help programming help with a 1-wire weather station.
I'am trying to display the temp/wind speed/direction on an a serial LCD.
I'am using the program below and would like to know how/where to add the serout lines to do this?
Please help
Tom
' File...... OW_WEATHER.BSP
' Purpose... 1-Wire Weather Station Interface
' Author.... Jon Williams / Parallax (portions by Tim Bitson)
' E-mail.... jonwms@aol.com / tbitson@mac.com
' Started... 13 DEC 2001
' Updated... 06 JAN 2002
' Modified for use by Terry Mitchell... 26 APR 2006
' { $STAMP BS2p }
'
[noparse][[/noparse] Program Description ]
'
' This program reads and displays the sensors from a Dallas 1-Wire Weather
' Station.
'
' NOTE: The 1-Wire bus requires a very stiff pull-up -- 1 kOhm or less.
'
[noparse][[/noparse] Revision History ]
'
' 15 DEC 2001 - Version 1 working
' 06 JAN 2002 - Updated error handling for bad wind vane
' 26 APR 2006 - Changed constants to reflect my usage - TEM
'
[noparse][[/noparse] I/O Definitions ]
'
OWpin·········· CON···· 15····················· ' 1-Wire bus
TX············ CON···· 8
bdmd·········· CON··· 17405
'
[noparse][[/noparse] Constants ]
'
' 1-Wire Support
'
OW_NoRst······· CON···· %0000·················· ' no Reset
OW_FERst······· CON···· %0001·················· ' Front-End Reset
OW_BERst······· CON···· %0010·················· ' Back-End Reset
OW_BitMode····· CON···· %0100
OW_HighSpd····· CON···· %1000
ReadROM········ CON···· $33···················· ' read ID, serial num, CRC
MatchROM······· CON···· $55···················· ' look for specific device
ODMatchROM····· CON···· $69···················· ' overdrive match rom
SkipROM········ CON···· $CC···················· ' skip rom (one device)
SearchROM······ CON···· $F0···················· ' search
' DS1820 control
'
CnvrtTemp······ CON···· $44···················· ' do temperature conversion
RdScratch······ CON···· $BE···················· ' read scratchpad
' DS2423 control
'
ReadMemCntr···· CON···· $A5···················· ' read memory + counter
' DS2450 control
'
ReadMem········ CON···· $AA···················· ' read memory
WriteMem······· CON···· $55···················· ' write memory
Convert········ CON···· $3C···················· ' do conversion
NoDevice······· CON···· %11···················· ' no device present
CommOkay······· CON···· 1
NoComm········· CON···· 0
Celsius········ CON···· 0
Fahrenheit····· CON···· 1
TMode·········· CON···· Fahrenheit············· ' temperature display mode
DegSym········· CON···· 176
MoveTo········· CON···· 2······················ ' DEBUG cursor positioning
LF············· CON···· 10····················· ' linefeed
'
[noparse][[/noparse] Variables ]
'
devCheck······· VAR···· Nib···················· ' device check return ocde
commStat······· VAR···· Bit···················· ' comm status
sensor········· VAR···· Nib···················· ' current sensor to display
eeAddr········· VAR···· Word··················· ' string pointer in EE
char··········· VAR···· Byte··················· ' character to print
idx············ VAR···· Nib···················· ' loop counter
romData········ VAR···· Byte(8)················ ' ROM data to devices
tempIn········· VAR···· Word··················· ' raw temperature
sign··········· VAR···· tempIn.BIT11··········· ' 1 = negative temperature
tLo············ VAR···· tempIn.LOWBYTE
tHi············ VAR···· tempIn.HIGHBYTE
tSign·········· VAR···· Bit
tempC·········· VAR···· Word··················· ' Celsius
tempF·········· VAR···· Word··················· ' Fahrenheit
cntrA·········· VAR···· Word··················· ' wind count start
cntrB·········· VAR···· tempIn················· ' wind count end
rps············ VAR···· tempC·················· ' revs per second
speed·········· VAR···· tempF·················· ' wind speed
crc16·········· VAR···· tempIn
verify········· VAR···· char
drection······· VAR···· tempC
dFlag·········· VAR···· tempF.LOWBYTE
rjNum·········· VAR···· Word··················· ' number to right justify
width·········· VAR···· Nib···················· ' width of field
rjSign········· VAR···· Bit
digits········· VAR···· Nib
'
[noparse][[/noparse] EEPROM Data ]
'
DS1820········ DATA··· $10,$1F,$45,$1B,$00,$08,$00,$65·········· ' temp sensor
DS2423········ DATA··· $1D,$71,$01,$01,$00,$00,$00,$2E·········· ' wind speed
DS2450········ DATA··· $20,$BA,$ED,$06,$00,$00,$00,$18·········· ' wind direction
CommUp········· DATA··· "... Up", 0
CommDn········· DATA··· ". Down", 0
WindDir········ DATA··· "··· N", 0, "· NNE", 0, "·· NE", 0, "· ENE", 0
··············· DATA··· "··· E", 0, "· ESE", 0, "·· SE", 0, "· SSE", 0
··············· DATA··· "··· S", 0, "· SSW", 0, "·· SW", 0, "· WSW", 0
··············· DATA··· "··· W", 0, "· WNW", 0, "·· NW", 0, "· NNW", 0
BadDir········· DATA··· "Error", 0
'
[noparse][[/noparse] Initialization ]
'
Initialize:
· DEBUG CLS···································· ' open DEBUG window
· PAUSE 250
Splash_Screen:
· DEBUG HOME
· DEBUG "==================================", CR
· DEBUG " BS2p <--> 1-Wire Weather Station ", CR
· DEBUG "==================================", CR
Charge_Station:
· INPUT OWpin
· IF (INS.LOWBIT(OWpin) = 0) THEN Bus_Shorted·· ' possible wiring problem
· HIGH OWpin
· DEBUG MoveTo, 0, 4, "Charging station..."
· FOR idx = 10 TO 1
··· DEBUG MoveTo, 20, 4, DEC idx, "· "
··· PAUSE 1000
· NEXT
· INPUT OWpin
· DEBUG MoveTo, 0, 4, REP " "\25
Weather_Labels:
· DEBUG MoveTo, 0, 4, "Comm.......... "
· DEBUG MoveTo, 0, 6, "( ) Temperature... ", CR
· DEBUG MoveTo, 0, 7, "( ) Wind Speed.... ", CR
· DEBUG MoveTo, 0, 8, "( ) Direction..... ", CR
'
[noparse][[/noparse] Main Code ]
'
Main:
· GOSUB Comm_Status···························· ' check 1-Wire comm
· IF (commStat = CommOkay) THEN Show_Sensors
· PAUSE 2000
· GOTO Initialize······························ ' "reboot" if comm went down
Show_Sensors:
· GOSUB Flag_Sensor···························· ' show sensor in use
· BRANCH sensor, [noparse][[/noparse]Show_Temp, Show_Wind_Speed, Show_Wind_Dir]
Main2:
· sensor = sensor + 1 // 3····················· ' select next sensor
· GOTO Main
· END
'
[noparse][[/noparse] Subroutines ]
'
' *******************************************************
' A shorted condition on the 1-Wire bus has been detected
' -- we can't charge the station cap in this condition
' *******************************************************
'
Bus_Shorted:
· DEBUG CLS, "The 1-Wire bus is shorted.", CR
· DEBUG "Please repair before continuing.", CR
· END
' ****************************
' Print status of 1-Wire comms
' ****************************
'
Comm_Status:
· eeAddr = CommUp······························ ' assume bus is up
· commStat = CommOkay
· GOSUB Device_Check··························· ' check bus for devices
· IF (devCheck <> NoDevice) THEN Print_Comm
· eeAddr = CommDn
· commStat = NoComm
· DEBUG MoveTo, 19, 6, REP " "\15·············· ' clear station data if down
· DEBUG MoveTo, 19, 7, REP " "\15
· DEBUG MoveTo, 19, 8, REP " "\15
Print_Comm:
· DEBUG MoveTo, 12, 4·························· ' show comm status
· GOSUB Print_String
· RETURN
' ************************************
' Check for presence of 1-Wire devices
' -- does not search for ROM codes
' ************************************
'
Device_Check:
· devCheck = 0
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]SearchROM]
· OWIN· OWpin, OW_BitMode, [noparse][[/noparse]devCheck.BIT1,devCheck.BIT0]
· RETURN
' **********************
' Indicate sensor in use
' **********************
'
Flag_Sensor:
· DEBUG MoveTo, 1, 6, " "······················ ' clear previous mark
· DEBUG MoveTo, 1, 7, " "
· DEBUG MoveTo, 1, 8, " "
· DEBUG MoveTo, 1, (6 + sensor), "*"··········· ' mark current sensor
· RETURN
' ********************************
' Transfer OW serial number to RAM
' -- point to SN with eeAddr
' ********************************
'
Load_SN:
· FOR idx = 0 TO 7····························· ' load ROM pattern
··· READ (eeAddr + idx), romData(idx)
· NEXT
· RETURN
' ********************************
' Retrieve and display temperature
' ********************************
'
Show_Temp:
· eeAddr = DS1820······························ ' load device serial number
· GOSUB Load_SN
· OWOUT OWpin, OW_FERst,[noparse][[/noparse]MatchROM, STR romData\8, CnvrtTemp]
· HIGH OWpin··································· ' extra juice during conversion
· PAUSE 750
· INPUT OWpin
· OWOUT OWpin, OW_FERst,[noparse][[/noparse]MatchROM, STR romData\8, RdScratch]
· OWIN· OWpin, OW_BERst,[noparse][[/noparse]tLo, tHi]
· tSign = sign································· ' save sign bit
· tempIn = tempIn >> 1························· ' round to whole degrees
· IF (tSign = 0) THEN NoNeg1
· tempIn = tempIn | $FF00······················ ' extend sign bits for negs
NoNeg1:
· tempC = tempIn······························· ' save Celsius value
· tempIn = tempIn */ $01CC····················· ' multiply by 1.8
· IF (tSign = 0) THEN NoNeg2··················· ' if neg, extend sign bits
· tempIn = tempIn | $FF00
NoNeg2:
· tempF = tempIn + 32·························· ' finish C -> F conversion
· DEBUG MoveTo, 19, 6·························· ' move cursor to temp display
· rjNum = tempF································ ' prep for right justified print
· width = 5···································· ' five digits wide
· GOSUB RJ_Print
· DEBUG " ", DegSym, "F····· "
· GOTO Main2
' *******************************
' Retrieve and display wind speed
' -- mph = rps * 2.453
' *******************************
'
Show_Wind_Speed:
· eeAddr = DS2423
· GOSUB Load_SN
· ' get starting count
· '
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]ODMatchROM]
· OWOUT OWpin, OW_HighSpd, [noparse][[/noparse]STR romData\8, ReadMemCntr, $DF, $01]
· OWIN· OWpin, (OW_HighSpd | OW_BERst), [noparse][[/noparse]cntrA.LOWBYTE, cntrA.LOWBYTE, cntrA.HIGHBYTE]
· PAUSE 2500··································· ' = revs for 5 seconds
· GOSUB Comm_Status
· IF (commStat = CommOkay) THEN Get_End_Count
· GOTO Main2··································· ' abort if comm down
· ' get ending count
· '
Get_End_Count:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]ODMatchROM]
· OWOUT OWpin, OW_HighSpd, [noparse][[/noparse]STR romData\8, ReadMemCntr, $DF, $01]
· OWIN· OWpin, (OW_HighSpd | OW_BERst), [noparse][[/noparse]cntrB.LOWBYTE, cntrB.LOWBYTE, cntrB.HIGHBYTE]
Calc_CPS:
· rps = cntrB - cntrA·························· ' get diffential count
· IF (cntrB >= cntrA) THEN Calc_Speed
· rps = rps + $FFFF···························· ' correct for rollover
Calc_Speed:
· speed = rps */ $04E7························· ' rps * 4.906 (tenths @ 5 seconds)
· DEBUG MoveTo, 19, 7
· width = 3···································· ' width of whole portion
· rjNum = speed / 10··························· ' get whole portion
· GOSUB RJ_Print······························· ' print it
· DEBUG ".", DEC1 speed, " mph····· "··············· ' then print tenths
· GOTO Main2
' ***********************************
' Retrieve and display Wind direction
' ***********************************
'
Show_Wind_Dir:
· eeAddr = DS2450
· GOSUB Load_SN
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, WriteMem, $08, $00]
· FOR idx = 1 TO 4····························· ' setup four channels
··· OWOUT OWpin, OW_NoRst, [noparse][[/noparse]$08]··············· ' 8-bit values
··· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE, verify]
··· OWOUT OWpin, OW_NoRst, [noparse][[/noparse]$01]··············· ' 5.12 volt scale
··· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE, verify]
· NEXT
Start_Conversion:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, Convert, $0F, $55]
· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE]
· HIGH OWpin··································· ' juice during conversion
· PAUSE 10
· INPUT OWpin
Get_A2D:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, ReadMem, $00, $00]
· OWIN· OWpin, OW_BERst, [noparse][[/noparse]STR romData\8]
Calc_Direction:
· FOR idx = 0 TO 3····························· ' convert readings to word
··· drection.LOWNIB(idx) = romData(idx * 2 + 1) / 90
· NEXT
· ' convert word to 1 of 16
· dFlag = 99··································· ' preset for error inidcation
· LOOKDOWN drection, [noparse][[/noparse]$2220,$1220,$1222,$1122,$2122,$2112,$2212,$2211], dFlag
· IF (dFlag < 8) THEN Show_Direction··········· ' found in first table
· LOOKDOWN drection, [noparse][[/noparse]$2221,$0221,$0222,$0022,$2022,$2002,$2202,$2200], dFlag
· dFlag = dFlag + 8···························· ' adjust for second table
Show_Direction:
· DEBUG MoveTo, 19, 8
· eeAddr = BadDir
· IF (dFlag < 16) THEN Good_Dir················ ' found in either table?
· GOTO Dir_To_Screen
Good_Dir:
· eeAddr = WindDir + (6 * dFlag)··············· ' address of direction string
Dir_To_Screen:
· GOSUB Print_String
· GOTO Main2
' ******************************
' Print a right-justified number
' ******************************
'
RJ_Print:
· rjSign = rjNum.BIT15
· rjNum = ABS(rjNum)
· digits = width
· LOOKDOWN rjNum,<[noparse][[/noparse]0,10,100,1000,65535],digits
· DEBUG REP " "\(width-digits-1), 13 * rjSign + " ", DEC rjNum
· RETURN
' ***************************************
' Print string at current cursor position
' -- point to string with eeAddr
' -- string is zero-terminated
' ***************************************
'
Print_String:
· READ eeAddr, char···························· ' get character from EEPROM
· IF (char = 0) THEN Print_String_Done········· ' if 0, string is done
· DEBUG char··································· ' print it
· eeAddr = eeAddr + 1·························· ' point to next character
· GOTO Print_String
Print_String_Done:
· RETURN
I'am trying to display the temp/wind speed/direction on an a serial LCD.
I'am using the program below and would like to know how/where to add the serout lines to do this?
Please help
Tom
' File...... OW_WEATHER.BSP
' Purpose... 1-Wire Weather Station Interface
' Author.... Jon Williams / Parallax (portions by Tim Bitson)
' E-mail.... jonwms@aol.com / tbitson@mac.com
' Started... 13 DEC 2001
' Updated... 06 JAN 2002
' Modified for use by Terry Mitchell... 26 APR 2006
' { $STAMP BS2p }
'
[noparse][[/noparse] Program Description ]
'
' This program reads and displays the sensors from a Dallas 1-Wire Weather
' Station.
'
' NOTE: The 1-Wire bus requires a very stiff pull-up -- 1 kOhm or less.
'
[noparse][[/noparse] Revision History ]
'
' 15 DEC 2001 - Version 1 working
' 06 JAN 2002 - Updated error handling for bad wind vane
' 26 APR 2006 - Changed constants to reflect my usage - TEM
'
[noparse][[/noparse] I/O Definitions ]
'
OWpin·········· CON···· 15····················· ' 1-Wire bus
TX············ CON···· 8
bdmd·········· CON··· 17405
'
[noparse][[/noparse] Constants ]
'
' 1-Wire Support
'
OW_NoRst······· CON···· %0000·················· ' no Reset
OW_FERst······· CON···· %0001·················· ' Front-End Reset
OW_BERst······· CON···· %0010·················· ' Back-End Reset
OW_BitMode····· CON···· %0100
OW_HighSpd····· CON···· %1000
ReadROM········ CON···· $33···················· ' read ID, serial num, CRC
MatchROM······· CON···· $55···················· ' look for specific device
ODMatchROM····· CON···· $69···················· ' overdrive match rom
SkipROM········ CON···· $CC···················· ' skip rom (one device)
SearchROM······ CON···· $F0···················· ' search
' DS1820 control
'
CnvrtTemp······ CON···· $44···················· ' do temperature conversion
RdScratch······ CON···· $BE···················· ' read scratchpad
' DS2423 control
'
ReadMemCntr···· CON···· $A5···················· ' read memory + counter
' DS2450 control
'
ReadMem········ CON···· $AA···················· ' read memory
WriteMem······· CON···· $55···················· ' write memory
Convert········ CON···· $3C···················· ' do conversion
NoDevice······· CON···· %11···················· ' no device present
CommOkay······· CON···· 1
NoComm········· CON···· 0
Celsius········ CON···· 0
Fahrenheit····· CON···· 1
TMode·········· CON···· Fahrenheit············· ' temperature display mode
DegSym········· CON···· 176
MoveTo········· CON···· 2······················ ' DEBUG cursor positioning
LF············· CON···· 10····················· ' linefeed
'
[noparse][[/noparse] Variables ]
'
devCheck······· VAR···· Nib···················· ' device check return ocde
commStat······· VAR···· Bit···················· ' comm status
sensor········· VAR···· Nib···················· ' current sensor to display
eeAddr········· VAR···· Word··················· ' string pointer in EE
char··········· VAR···· Byte··················· ' character to print
idx············ VAR···· Nib···················· ' loop counter
romData········ VAR···· Byte(8)················ ' ROM data to devices
tempIn········· VAR···· Word··················· ' raw temperature
sign··········· VAR···· tempIn.BIT11··········· ' 1 = negative temperature
tLo············ VAR···· tempIn.LOWBYTE
tHi············ VAR···· tempIn.HIGHBYTE
tSign·········· VAR···· Bit
tempC·········· VAR···· Word··················· ' Celsius
tempF·········· VAR···· Word··················· ' Fahrenheit
cntrA·········· VAR···· Word··················· ' wind count start
cntrB·········· VAR···· tempIn················· ' wind count end
rps············ VAR···· tempC·················· ' revs per second
speed·········· VAR···· tempF·················· ' wind speed
crc16·········· VAR···· tempIn
verify········· VAR···· char
drection······· VAR···· tempC
dFlag·········· VAR···· tempF.LOWBYTE
rjNum·········· VAR···· Word··················· ' number to right justify
width·········· VAR···· Nib···················· ' width of field
rjSign········· VAR···· Bit
digits········· VAR···· Nib
'
[noparse][[/noparse] EEPROM Data ]
'
DS1820········ DATA··· $10,$1F,$45,$1B,$00,$08,$00,$65·········· ' temp sensor
DS2423········ DATA··· $1D,$71,$01,$01,$00,$00,$00,$2E·········· ' wind speed
DS2450········ DATA··· $20,$BA,$ED,$06,$00,$00,$00,$18·········· ' wind direction
CommUp········· DATA··· "... Up", 0
CommDn········· DATA··· ". Down", 0
WindDir········ DATA··· "··· N", 0, "· NNE", 0, "·· NE", 0, "· ENE", 0
··············· DATA··· "··· E", 0, "· ESE", 0, "·· SE", 0, "· SSE", 0
··············· DATA··· "··· S", 0, "· SSW", 0, "·· SW", 0, "· WSW", 0
··············· DATA··· "··· W", 0, "· WNW", 0, "·· NW", 0, "· NNW", 0
BadDir········· DATA··· "Error", 0
'
[noparse][[/noparse] Initialization ]
'
Initialize:
· DEBUG CLS···································· ' open DEBUG window
· PAUSE 250
Splash_Screen:
· DEBUG HOME
· DEBUG "==================================", CR
· DEBUG " BS2p <--> 1-Wire Weather Station ", CR
· DEBUG "==================================", CR
Charge_Station:
· INPUT OWpin
· IF (INS.LOWBIT(OWpin) = 0) THEN Bus_Shorted·· ' possible wiring problem
· HIGH OWpin
· DEBUG MoveTo, 0, 4, "Charging station..."
· FOR idx = 10 TO 1
··· DEBUG MoveTo, 20, 4, DEC idx, "· "
··· PAUSE 1000
· NEXT
· INPUT OWpin
· DEBUG MoveTo, 0, 4, REP " "\25
Weather_Labels:
· DEBUG MoveTo, 0, 4, "Comm.......... "
· DEBUG MoveTo, 0, 6, "( ) Temperature... ", CR
· DEBUG MoveTo, 0, 7, "( ) Wind Speed.... ", CR
· DEBUG MoveTo, 0, 8, "( ) Direction..... ", CR
'
[noparse][[/noparse] Main Code ]
'
Main:
· GOSUB Comm_Status···························· ' check 1-Wire comm
· IF (commStat = CommOkay) THEN Show_Sensors
· PAUSE 2000
· GOTO Initialize······························ ' "reboot" if comm went down
Show_Sensors:
· GOSUB Flag_Sensor···························· ' show sensor in use
· BRANCH sensor, [noparse][[/noparse]Show_Temp, Show_Wind_Speed, Show_Wind_Dir]
Main2:
· sensor = sensor + 1 // 3····················· ' select next sensor
· GOTO Main
· END
'
[noparse][[/noparse] Subroutines ]
'
' *******************************************************
' A shorted condition on the 1-Wire bus has been detected
' -- we can't charge the station cap in this condition
' *******************************************************
'
Bus_Shorted:
· DEBUG CLS, "The 1-Wire bus is shorted.", CR
· DEBUG "Please repair before continuing.", CR
· END
' ****************************
' Print status of 1-Wire comms
' ****************************
'
Comm_Status:
· eeAddr = CommUp······························ ' assume bus is up
· commStat = CommOkay
· GOSUB Device_Check··························· ' check bus for devices
· IF (devCheck <> NoDevice) THEN Print_Comm
· eeAddr = CommDn
· commStat = NoComm
· DEBUG MoveTo, 19, 6, REP " "\15·············· ' clear station data if down
· DEBUG MoveTo, 19, 7, REP " "\15
· DEBUG MoveTo, 19, 8, REP " "\15
Print_Comm:
· DEBUG MoveTo, 12, 4·························· ' show comm status
· GOSUB Print_String
· RETURN
' ************************************
' Check for presence of 1-Wire devices
' -- does not search for ROM codes
' ************************************
'
Device_Check:
· devCheck = 0
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]SearchROM]
· OWIN· OWpin, OW_BitMode, [noparse][[/noparse]devCheck.BIT1,devCheck.BIT0]
· RETURN
' **********************
' Indicate sensor in use
' **********************
'
Flag_Sensor:
· DEBUG MoveTo, 1, 6, " "······················ ' clear previous mark
· DEBUG MoveTo, 1, 7, " "
· DEBUG MoveTo, 1, 8, " "
· DEBUG MoveTo, 1, (6 + sensor), "*"··········· ' mark current sensor
· RETURN
' ********************************
' Transfer OW serial number to RAM
' -- point to SN with eeAddr
' ********************************
'
Load_SN:
· FOR idx = 0 TO 7····························· ' load ROM pattern
··· READ (eeAddr + idx), romData(idx)
· NEXT
· RETURN
' ********************************
' Retrieve and display temperature
' ********************************
'
Show_Temp:
· eeAddr = DS1820······························ ' load device serial number
· GOSUB Load_SN
· OWOUT OWpin, OW_FERst,[noparse][[/noparse]MatchROM, STR romData\8, CnvrtTemp]
· HIGH OWpin··································· ' extra juice during conversion
· PAUSE 750
· INPUT OWpin
· OWOUT OWpin, OW_FERst,[noparse][[/noparse]MatchROM, STR romData\8, RdScratch]
· OWIN· OWpin, OW_BERst,[noparse][[/noparse]tLo, tHi]
· tSign = sign································· ' save sign bit
· tempIn = tempIn >> 1························· ' round to whole degrees
· IF (tSign = 0) THEN NoNeg1
· tempIn = tempIn | $FF00······················ ' extend sign bits for negs
NoNeg1:
· tempC = tempIn······························· ' save Celsius value
· tempIn = tempIn */ $01CC····················· ' multiply by 1.8
· IF (tSign = 0) THEN NoNeg2··················· ' if neg, extend sign bits
· tempIn = tempIn | $FF00
NoNeg2:
· tempF = tempIn + 32·························· ' finish C -> F conversion
· DEBUG MoveTo, 19, 6·························· ' move cursor to temp display
· rjNum = tempF································ ' prep for right justified print
· width = 5···································· ' five digits wide
· GOSUB RJ_Print
· DEBUG " ", DegSym, "F····· "
· GOTO Main2
' *******************************
' Retrieve and display wind speed
' -- mph = rps * 2.453
' *******************************
'
Show_Wind_Speed:
· eeAddr = DS2423
· GOSUB Load_SN
· ' get starting count
· '
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]ODMatchROM]
· OWOUT OWpin, OW_HighSpd, [noparse][[/noparse]STR romData\8, ReadMemCntr, $DF, $01]
· OWIN· OWpin, (OW_HighSpd | OW_BERst), [noparse][[/noparse]cntrA.LOWBYTE, cntrA.LOWBYTE, cntrA.HIGHBYTE]
· PAUSE 2500··································· ' = revs for 5 seconds
· GOSUB Comm_Status
· IF (commStat = CommOkay) THEN Get_End_Count
· GOTO Main2··································· ' abort if comm down
· ' get ending count
· '
Get_End_Count:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]ODMatchROM]
· OWOUT OWpin, OW_HighSpd, [noparse][[/noparse]STR romData\8, ReadMemCntr, $DF, $01]
· OWIN· OWpin, (OW_HighSpd | OW_BERst), [noparse][[/noparse]cntrB.LOWBYTE, cntrB.LOWBYTE, cntrB.HIGHBYTE]
Calc_CPS:
· rps = cntrB - cntrA·························· ' get diffential count
· IF (cntrB >= cntrA) THEN Calc_Speed
· rps = rps + $FFFF···························· ' correct for rollover
Calc_Speed:
· speed = rps */ $04E7························· ' rps * 4.906 (tenths @ 5 seconds)
· DEBUG MoveTo, 19, 7
· width = 3···································· ' width of whole portion
· rjNum = speed / 10··························· ' get whole portion
· GOSUB RJ_Print······························· ' print it
· DEBUG ".", DEC1 speed, " mph····· "··············· ' then print tenths
· GOTO Main2
' ***********************************
' Retrieve and display Wind direction
' ***********************************
'
Show_Wind_Dir:
· eeAddr = DS2450
· GOSUB Load_SN
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, WriteMem, $08, $00]
· FOR idx = 1 TO 4····························· ' setup four channels
··· OWOUT OWpin, OW_NoRst, [noparse][[/noparse]$08]··············· ' 8-bit values
··· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE, verify]
··· OWOUT OWpin, OW_NoRst, [noparse][[/noparse]$01]··············· ' 5.12 volt scale
··· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE, verify]
· NEXT
Start_Conversion:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, Convert, $0F, $55]
· OWIN· OWpin, OW_NoRst, [noparse][[/noparse]crc16.LOWBYTE, crc16.HIGHBYTE]
· HIGH OWpin··································· ' juice during conversion
· PAUSE 10
· INPUT OWpin
Get_A2D:
· OWOUT OWpin, OW_FERst, [noparse][[/noparse]MatchROM, STR romData\8, ReadMem, $00, $00]
· OWIN· OWpin, OW_BERst, [noparse][[/noparse]STR romData\8]
Calc_Direction:
· FOR idx = 0 TO 3····························· ' convert readings to word
··· drection.LOWNIB(idx) = romData(idx * 2 + 1) / 90
· NEXT
· ' convert word to 1 of 16
· dFlag = 99··································· ' preset for error inidcation
· LOOKDOWN drection, [noparse][[/noparse]$2220,$1220,$1222,$1122,$2122,$2112,$2212,$2211], dFlag
· IF (dFlag < 8) THEN Show_Direction··········· ' found in first table
· LOOKDOWN drection, [noparse][[/noparse]$2221,$0221,$0222,$0022,$2022,$2002,$2202,$2200], dFlag
· dFlag = dFlag + 8···························· ' adjust for second table
Show_Direction:
· DEBUG MoveTo, 19, 8
· eeAddr = BadDir
· IF (dFlag < 16) THEN Good_Dir················ ' found in either table?
· GOTO Dir_To_Screen
Good_Dir:
· eeAddr = WindDir + (6 * dFlag)··············· ' address of direction string
Dir_To_Screen:
· GOSUB Print_String
· GOTO Main2
' ******************************
' Print a right-justified number
' ******************************
'
RJ_Print:
· rjSign = rjNum.BIT15
· rjNum = ABS(rjNum)
· digits = width
· LOOKDOWN rjNum,<[noparse][[/noparse]0,10,100,1000,65535],digits
· DEBUG REP " "\(width-digits-1), 13 * rjSign + " ", DEC rjNum
· RETURN
' ***************************************
' Print string at current cursor position
' -- point to string with eeAddr
' -- string is zero-terminated
' ***************************************
'
Print_String:
· READ eeAddr, char···························· ' get character from EEPROM
· IF (char = 0) THEN Print_String_Done········· ' if 0, string is done
· DEBUG char··································· ' print it
· eeAddr = eeAddr + 1·························· ' point to next character
· GOTO Print_String
Print_String_Done:
· RETURN
Comments
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Chris Savage
Parallax Tech Support