Code:
'*****************************************
'* Name : MLX90614.BAS *
'* Notes : 4D Systems - IR TEMP SENSOR *
'*****************************************
#IF __PROCESSOR__ = "18F26k22"
@ ERRORLEVEL -306 ; this command prevents the compiler to give you a notice of *
; crossing page boundary - make sure bits are set *
'*********************************************************************************
#CONFIG ; The PBP configuration for the PIC18F26K22 is:
CONFIG FOSC = HSHP ; HS oscillator (high power > 16 MHz)
CONFIG PLLCFG = OFF ;Oscillator used directly
CONFIG PRICLKEN = ON ;Primary clock enabled
CONFIG FCMEN = OFF ;Fail-Safe Clock Monitor disabled
CONFIG IESO = OFF ;Oscillator Switchover mode disabled
CONFIG BOREN = SBORDIS ; Brown-out Reset enabled in hardware only (SBOREN is disabled)
CONFIG WDTEN = ON ; WDT is always enabled. SWDTEN bit has no effect
CONFIG WDTPS = 32768 ; 1:32768 ---> HERE enable the watchdog timer with a 1:32768 postscale
CONFIG PWRTEN = ON
CONFIG HFOFST = ON ; HFINTOSC output and ready status are not delayed by the oscillator stable status
CONFIG MCLRE = EXTMCLR ; MCLR pin enabled, RE3 input pin disabled
CONFIG LVP = OFF ; Single-Supply ICSP disabled
CONFIG XINST = OFF ; Instruction set extension and Indexed Addressing mode disabled (Legacy mode)
CONFIG DEBUG = OFF ; Disabled
CONFIG CP0 = OFF ; Block 0 (000800-003FFFh) not code-protected
CONFIG CP1 = OFF ; Block 1 (004000-007FFFh) not code-protected
CONFIG CP2 = OFF ; Block 2 (008000-00BFFFh) not code-protected
CONFIG CP3 = OFF ; Block 3 (00C000-00FFFFh) not code-protected
CONFIG CPB = OFF ; Boot block (000000-0007FFh) not code-protected
CONFIG CPD = OFF ; Data EEPROM not code-protected
CONFIG WRT0 = OFF ; Block 0 (000800-003FFFh) not write-protected
CONFIG WRT1 = OFF ; Block 1 (004000-007FFFh) not write-protected
CONFIG WRT2 = OFF ; Block 2 (008000-00BFFFh) not write-protected
CONFIG WRT3 = OFF ; Block 3 (00C000-00FFFFh) not write-protected
CONFIG WRTC = OFF ; Configuration registers (300000-3000FFh) not write-protected
CONFIG WRTB = OFF ; Boot Block (000000-0007FFh) not write-protected
CONFIG WRTD = OFF ; Data EEPROM not write-protected
CONFIG EBTR0 = OFF ; Block 0 (000800-003FFFh) not protected from table reads executed in other blocks
CONFIG EBTR1 = OFF ; Block 1 (004000-007FFFh) not protected from table reads executed in other blocks
CONFIG EBTR2 = OFF ; Block 2 (008000-00BFFFh) not protected from table reads executed in other blocks
CONFIG EBTR3 = OFF ; Block 3 (00C000-00FFFFh) not protected from table reads executed in other blocks
CONFIG EBTRB = OFF ; Boot Block (000000-0007FFh) not protected from table reads executed in other blocks
#ENDCONFIG
#ELSE
#MSG "Wrong Processor selected!"
#ENDIF
;*-----------------------------------------------------------------------------|
;*-----------------------------------------------------------------------------|
define OSC 16
INCLUDE "modedefs.bas"
INCLUDE"ALLDIGITAL.pbp"
OSCCON = %01110000 ; 16Mhz
'------------------------------------------------------------------------------|
' INITIALIZE RAM |
'------------------------------------------------------------------------------|
initialize:
CLEAR
TRISA = %00000000
TRISB = %00000000
TRISC = %10000110
'------------------------------------------------------------------------------|
'----------------------- At start all PORTS LOW -------------------------------|
'------------------------------------------------------------------------------|
PORTA = 0 'make low all ports at A range |
PORTB = 0 'make low all ports at B range |
PORTC = 0 'make low all ports at C range |
'------------------------------------------------------------------------------|
'------------------------------------------------------------------------------|
'-------------------------- COMPARATORS OFF -----------------------------------|
'------------------------------------------------------------------------------|
CM1CON0.7 = 0 'Disable comparator1 |
CM2CON0.7 = 0 'Disable comparator2 |
'------------------------------------------------------------------------------|
'*-----------------------------------------------------------------------------|
Timeout CON 2000
addr var byte
reg var word
ORANGE var LATA.2 ' ORANGE LED TO INDICATE POWER ON OF THE PIC
BLUE var LATC.0 ' BLUE LED TO INDICATE SENSOR WOKRING CONDITION
SDA var portc.1 ' DATA PIN
SCL VAR portc.2 ' CLOCK PIN
sign var byte ' for + or -
TEMP var word ' this is the word variable for TEMP
temperature var word ' for result and output to lcd
TEMPIR var word ' set a variable tempir
Remainder var word ' Get the remainder = tempir//50
Sign_Bit VAR Temp.Bit14 ' Sign-Bit for +/- Temp. 1 = Below 0 deg C
SignCold CON 1 ' Define Sign Cold = 1
'*-----------------------------------------------------------------------------|
'* | --------------------- | |
'*----------------------- | EUART 1 Configuration | --------------------------|
'* | --------------------- | |
'*-----------------------------------------------------------------------------|
DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
DEFINE HSER_CLROERR 1 ' Clear overflow automatically
DEFINE HSER_SPBRG 25 ' 38400 Baud @ 16MHz, 0.16%
SPBRGH = 0
BAUDCON.3 = 1 ' Enable 16 bit baudrate generator
'*-----------------------------------------------------------------------------|
'*-----------------------------------------------------------------------------|
' -----------------------------------------------------------------------------|
' [ LCD Initialization ] |
'------------------------------------------------------------------------------|
gosub initlcd
'------------------------------------------------------------------------------*
start:
gosub object
goto start
'------------------------------------------------------------------------------*
' Measure object temp *
'------------------------------------------------------------------------------*
object:
reg = $07 ' based on the datasheet $07 is the object's temp
addr = %10110100 ' $B4 binary value: %10110100
i2cwrite SDA, scl, addr ' shift the address B4, 8 bits where LSB is W = 0
i2cwrite sda, scl, reg ' register is $07
addr = %10110101 ' $B5 Binary value: %10110101
i2cwrite sda, scl, addr ' shift the address B5, 8 bits where LSB is R = 1, clock idles low
i2cread SDA, SCL, 0,reg,[temp.lowbyte,temp.highbyte] ' reg = $07
Sign = "+"
'shifts 8 bits to the left
tempir = temp.highbyte << 8
tempir = tempir + temp.lowbyte ' add the temp.lowbyte
temperature = tempir/50 ' based on the manual we need to divide by 50 or 0.02
temperature = temperature - 273 ' subtract 273 for Degree in C,actually is 273,15
remainder = tempir//50 ' i think this gives me a wrong result or it may need some better maths to get the right value.
pause 100
gosub display
return
'------------------------------------------------------------------------------*
' Display the parameters *
'------------------------------------------------------------------------------*
display:
hserout [$73,$00,$02,$12,$00,$ff,"TEMP =", Sign,dec2 temperature,".",dec2 remainder,"*C",00]
Hserin timeout,error,[wait(6)]
hserout [$73,$02,$06,$10,$ff,$00,"RAW IR = ",dec tempir,00]
Hserin timeout,error,[wait(6)]
hserout [$73,$02,$08,$10,$ff,$00,"T HI = ",dec temp.highbyte,00]
Hserin timeout,error,[wait(6)]
hserout [$73,$02,$0A,$10,$ff,$00,"T LOW = ",dec temp.lowbyte,00]
Hserin timeout,error,[wait(6)]
return
'------------------------------------------------------------------------------*
error:
high blue
PAUSE 10
return
'------------------------------------------------------------------------------*
' FIRST TIME BOOTUP: We give plenty of time for tbe LCD '
initlcd:
pause 1000
HSEROUT[$55] ' uOLED Initialize this is the 'U' character of autoband rate to LCD
Hserin timeout,error,[wait(6)]
hserout[$56,$01] ' this is the Version info --> '01 10 17 28 28 -->> "(("
Hserin timeout,error,[wait(1),wait(16),wait(23),wait(40),wait(40)]
PAUSE 1000
HSEROUT [$45] ' clear the LCD
Hserin timeout,error,[wait(6)]
pause 500
Hserout[$4F,$01] ; Set Transparent-Opaque Text - 4Fhex
Hserin timeout,error,[wait(6)]
HSEROUT [$45] ' clear the LCD
Hserin timeout,error,[wait(6)]
high orange
return
end
IR temp sensor
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