Thermo 7 segments - little problem
Hello !
I intend to make one digital thermometer, this time using a 7 segments display. I use code from my previous thermometer and from this forum for interfacing PIC with display. Unfortunate on display I have only "0". I think I made some mistakes in variables statements, but I need little help....Thanks in advance for every reply.
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if you are using isis for simulation , it is hard to scanning displays.
it doesnt work properly when displays are scanning.
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?!
Yes, I use ISIS... It's this a problem ?! I wrote another code, with the same results : "000" on display. Both (wrong) results are because of simulation ? Thanks for reply !
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i wrote some codes below it worked on isis.
some register names and label are written in turkish. i tried to comment them to english.Code:SEGMENT_A VAR PORTB.3 SEGMENT_B VAR PORTB.7 SEGMENT_C VAR PORTB.0 SEGMENT_D VAR PORTA.3 SEGMENT_E VAR PORTA.2 SEGMENT_F VAR PORTB.2 SEGMENT_G VAR PORTB.1 DP VAR PORTB.6 BASAMAK_0 VAR PORTA.1 BASAMAK_1 VAR PORTA.7 BASAMAK_2 VAR PORTA.0 BASAMAK_3 VAR PORTA.6 DQ VAR PORTB.5 TEMP VAR BYTE I VAR BYTE SIGN VAR BIT ISI VAR WORD ; TEMPERATURE REGISTER COUNT_REMAIN VAR BYTE MASK_0 VAR BYTE MASK_1 VAR BYTE MASK_2 VAR BYTE MASK_3 VAR BYTE CMCON = 7 OUTPUT SEGMENT_A OUTPUT SEGMENT_B OUTPUT SEGMENT_C OUTPUT SEGMENT_D OUTPUT SEGMENT_E OUTPUT SEGMENT_F OUTPUT SEGMENT_G OUTPUT DP OUTPUT BASAMAK_0 OUTPUT BASAMAK_1 OUTPUT BASAMAK_2 OUTPUT BASAMAK_3 SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 DP = 0 BASAMAK_0 = 1 ; DISPLAYS 1. DIGIT BASAMAK_1 = 1 ; DISPLAYS 2. DIGIT BASAMAK_2 = 1 ; DISPLAYS 3. DIGIT BASAMAK_3 = 1 ; DISPLAYS 4. DIGIT MAIN : OWOUT DQ ,1,[$CC,$44] BEKLE : GOSUB EKRAN_0 FOR I = 0 TO 4 GOSUB TARA NEXT I OWIN DQ ,4,[COUNT_REMAIN] IF COUNT_REMAIN = 0 THEN GOTO BEKLE ENDIF OWOUT DQ ,1,[$CC,$BE] OWIN DQ ,0,[ISI.LOWBYTE , ISI.HIGHBYTE] IF ISI.15 = 1 THEN ISI = (65535 - ISI) + 1 SIGN = 1 ELSE SIGN = 0 ENDIF ISI = (ISI * 10)/16 GOTO MAIN EKRAN_0 : ; TRANSFER THE REGISTERS TO DIPLAY MASK_3 = ISI DIG 3 MASK_2 = ISI DIG 2 IF SIGN = 1 THEN MASK_3 = " " MASK_2 = "-" ENDIF MASK_1 = ISI DIG 1 MASK_0 = ISI DIG 0 RETURN TARA : ; SCAN THE DISPLAYS TEMP = MASK_3 : GOSUB TABLO BASAMAK_3 = 0 : PAUSE 1 : BASAMAK_3 = 1 '**************************************************************** '**************************************************************** TEMP = MASK_2 : GOSUB TABLO BASAMAK_2 = 0 : PAUSE 1 : BASAMAK_2 = 1 '**************************************************************** '**************************************************************** TEMP = MASK_1 : GOSUB TABLO BASAMAK_1 = 0 : DP = 1 : PAUSE 1 : BASAMAK_1 = 1 : DP = 0 '**************************************************************** '**************************************************************** TEMP = MASK_0 : GOSUB TABLO BASAMAK_0 = 0 : PAUSE 1 : BASAMAK_0 = 1 RETURN TABLO : ; TABLE , CONVERTS THE DATAS TO 7 SEGMENT CODE SELECT CASE TEMP CASE 0 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 0 CASE 1 SEGMENT_A = 0 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 CASE 2 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 0 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 0 SEGMENT_G = 1 CASE 3 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 1 CASE 4 SEGMENT_A = 0 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE 5 SEGMENT_A = 1 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE 6 SEGMENT_A = 1 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE 7 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 CASE 8 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE 9 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE "-" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 1 CASE "h" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE "o" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 0 SEGMENT_G = 1 CASE "b" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE " " SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 END SELECT RETURN
there is no transistors to drive diplays.
if your version is same with my isis , it will work.
all files in attachment.
Last edited by mehmetOzdemir; - 22nd January 2010 at 19:07.
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Thank You verry much for support ! ...My ISIS is Release 7.4 SP3, and Your code (copy/paste/compiling, because the zip file is empty !) DON'T WORK !!!
Verry strange... PIC and statements are the same ?
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i refreshed the zip file download again.
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Anod versus Catod
You use CC, I use AC... Yes, of course that Your code works ! Great ! I will try now the "live" schematic ! Wish me luck !
Thank You, again ! All the best !
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...a little problem : don't display value under -9.9 'C ! For -10.0 'C the display show - 0,0 'C. Now, in my town, outside is -12'C !!! (brrrrrrr...)
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ok. i understood the problem . we will shift the "-" string 1 step left.
change the "ekran_0" label with below ;
Code:ekran_0 : ; transfer the registers to diplay mask_3 = isi dig 3 if sign = 1 then mask_3 = "-" endif mask_2 = isi dig 2 mask_1 = isi dig 1 mask_0 = isi dig 0 return
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Without flickering...
I made the thermometer, using the code from Mr.Mehmet - Thanks ! I use common cathode LED display. But..., with the schematic from Mr.Mehmet , the display have flicker...It' one good ideea to use transistors for cathodes, like in picture ? It's correct ? (In ISIS dont work !
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Try to learn about INTERRUPTS
I re-write the code posted by Mehmet (Thanks !) , because I intend to use interrupts. On ISIS work ...fine (little flicker ?!) . But...I wonder if the code it's right. I re-re-read MCSE help about using interrupts...and, of course, any advice it's wellcome. Thanks in advance !PS: Remove .txt extension from attachament, for using in iSIS.Code:'********************************************************* '* * '* Termometru 7 segmente * '* cu intreruperi * '* * '********************************************************* @ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON, MCLR_OFF, LVP_OFF, CPD_OFF, PROTECT_OFF DEFINE NO_CLRWDT 1 DEFINE OSC 4 TRISA= %11110000 ' RA0..3=Outputs RA4...7=Input TRISB= %00000000 ' RB0..RB7=Outputs CMCON=7 ' Disable comparators SEGMENT_A VAR PORTB.0 SEGMENT_B VAR PORTB.1 SEGMENT_C VAR PORTB.2 SEGMENT_D VAR PORTB.3 SEGMENT_E VAR PORTB.4 SEGMENT_F VAR PORTB.5 SEGMENT_G VAR PORTB.6 DP VAR PORTB.7 CATOD_0 VAR PORTA.0 CATOD_1 VAR PORTA.1 CATOD_2 VAR PORTA.2 CATOD_3 VAR PORTA.3 DQ VAR PORTA.4 OPTION_REG = %10000000 Temp var byte DS18B20_12bit CON %01111111 ' 750ms, 0.0625°C Temperature Var Word TempC Var Word I Var Byte Sign Var Bit Count_remain var Byte Float Var Word V Var Word ' Var. for display Twist Var Bit Dummy Var Byte Busy var BIT ' Busy Status-Bit DIGIT_0 VAR BYTE DIGIT_1 VAR BYTE DIGIT_2 VAR BYTE DIGIT_3 VAR BYTE OUTPUT SEGMENT_A OUTPUT SEGMENT_B OUTPUT SEGMENT_C OUTPUT SEGMENT_D OUTPUT SEGMENT_E OUTPUT SEGMENT_F OUTPUT SEGMENT_G OUTPUT DP OUTPUT CATOD_0 OUTPUT CATOD_1 OUTPUT CATOD_2 OUTPUT CATOD_3 SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 DP = 0 CATOD_0 = 1 ; DISPLAYS 1. DIGIT CATOD_1 = 1 ; DISPLAYS 2. DIGIT CATOD_2 = 1 ; DISPLAYS 3. DIGIT CATOD_3 = 1 ; DISPLAYS 4. DIGIT '============================================================ ON INTERRUPT GOTO ISR INTCON = %10100000 '============================================================ OWOut DQ, 1, [$CC, $4E, 0, 0, DS18B20_12bit] Output DQ ' Make Pin Output DQ=0 ' OneWire line Low PauseUs 480 ' Keep down for 480 µS Input DQ ' Make Pin Input PauseUs 70 ' Wait 70 µS Pause 500 W1: OWIN DQ,4,[busy] ' Check for still busy converting IF busy = 0 THEN W1 ' Still busy? then loop '============================================================ MAIN : OWOUT DQ ,1,[$CC,$44] OWOUT DQ ,1,[$CC,$BE] OWIN DQ ,2,[Temperature.LOWBYTE , Temperature.HIGHBYTE] Convert_Temp: If Temperature.15 then Temperature= ~Temperature +1 Twist = 1 Sign = 1 Endif Dummy = 625 * Temperature TempC = DIV32 10 TempC = (Temperature & $7FF) >> 4 Float = ((Temperature.Lowbyte & $0F ) * 25 )>>2 Temperature = TempC*100 + Float If Twist then V= 10000 - Temperature ' 25 C=12500 0 C=10000 -10 C=9000 Twist = 0 else V= 10000 + Temperature EndIf GoSub Sign_temp Temperature = Temperature/10 GOSUB AFISARE FOR I = 0 TO 4 GOSUB SCANNING NEXT I GOTO MAIN '============================================================ ' SUBROUTINES: '============================================================ Sign_temp: If V >= 10000 then ' Above 0 C. Temperature=V-10000 sign = " " Else Temperature=10000-V ' Below 0 C. sign= "-" EndIf Return '============================================================ AFISARE : ' transfer the registers to diplay IF TEMPERATURE DIG 3 = 0 THEN DIGIT_3 = " " ELSE DIGIT_3 = TEMPERATURE dig 3 ENDIF IF sign = 1 THEN DIGIT_3 = "-" ENDIF IF TEMPERATURE DIG 2 = 0 THEN DIGIT_2 = " " ELSE DIGIT_2 = TEMPERATURE dig 2 ENDIF DIGIT_1 = TEMPERATURE dig 1 DIGIT_0 = TEMPERATURE dig 0 Return DISABLE ISR: '============================================================ SCANNING : ' SCAN THE DISPLAYS TEMP = DIGIT_3 : GOSUB TABLO CATOD_3 = 0 : PAUSE 1 : CATOD_3 = 1 TEMP = DIGIT_2 : GOSUB TABLO CATOD_2 = 0 : PAUSE 1 : CATOD_2 = 1 TEMP = DIGIT_1 : GOSUB TABLO CATOD_1 = 0 : DP = 1 : PAUSE 1 : CATOD_1 = 1 : DP = 0 TEMP = DIGIT_0 : GOSUB TABLO CATOD_0 = 0 : PAUSE 1 : CATOD_0 = 1 Return '============================================================ TABLO : ' TABLE , CONVERTS THE DATAS TO 7 SEGMENT CODE SELECT CASE TEMP CASE 0 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 0 CASE 1 SEGMENT_A = 0 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 CASE 2 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 0 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 0 SEGMENT_G = 1 CASE 3 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 1 CASE 4 SEGMENT_A = 0 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE 5 SEGMENT_A = 1 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE 6 SEGMENT_A = 1 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE 7 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 CASE 8 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE 9 SEGMENT_A = 1 SEGMENT_B = 1 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 0 SEGMENT_F = 1 SEGMENT_G = 1 CASE "-" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 1 CASE "h" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 0 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE "o" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 0 SEGMENT_G = 1 CASE "b" SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 1 SEGMENT_D = 1 SEGMENT_E = 1 SEGMENT_F = 1 SEGMENT_G = 1 CASE " " SEGMENT_A = 0 SEGMENT_B = 0 SEGMENT_C = 0 SEGMENT_D = 0 SEGMENT_E = 0 SEGMENT_F = 0 SEGMENT_G = 0 END SELECT RETURN INTCON.2=0 RESUME ENABLE '============================================================ END
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doesnt compile
To mehmetOzdemir
Hi I have downloaded and ran isis.zip files and it worked fine for me but when I compile the pic basic file in the isis.zip file and re simulate it in isis it only displays as per the attatched image.
Any ideas? is the pic basic file ok?
I am only learning this system so I am confused as to why it works perfect with original files but yet I cant compile it from my picbasic system.
This is what I get when I compile the files in the zip myself.
Last edited by zorbzz; - 10th May 2010 at 03:35.
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I used MPASM when i compiled it. Try to use MPASM or add your config settings to the top of your code.
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Try to add this :
and don't forget to tell ISIS that your PIC work at 4 Mhz.Code:@ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON, MCLR_OFF, LVP_OFF, CPD_OFF, PROTECT_OFF DEFINE NO_CLRWDT 1 DEFINE OSC 4 TRISA ..... (0 = OUTPUT ; 1 = INPUT) TRISB ..... ( ID.)
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Ok thanks alot i'll try that.
Originally Posted by fratello
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Thanks again it works perfect now.
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Hi ! Me again :) ...
I made this schematic; I use this code. Works fine, but.... I don't know how to display "minus sign" for negative temperatures. I try differents variants, but without results...Any advice it's wellcome ! Thanks in advance !
Code:' ************************************************************* ' * For use with EXPERIMENTING WITH THE PICBASIC PRO COMPILER * ' * * ' * This source code may be freely used within your own * ' * programs. However, if it is used for profitable reasons, * ' * please give credit where credit is due. * ' * And make a reference to myself or Rosetta Technologies * ' * * ' * Les. Johnson * ' ************************************************************* ' ' Common Anode seven segment display multiplexer ' Displays the contents of the variable D_NUMBER on five common Anode displays ' using a TMR0 interrupt ' *********************************************************************** @ DEVICE pic16F648A, XT_OSC, WDT_OFF, PWRT_OFF, BOD_OFF, MCLR_OFF, LVP_OFF, CPD_OFF CMCON = 7 VRCON = 0 INTCON = 0 Include "Modedefs.bas" ' ** Setup the Crystal Frequency, in mHz ** Define OSC 4 ' Set Xtal Frequency ' ** Declare the Variables ** LEDS Var Byte ' The amount of LEDs in the display O_C Var Byte ' Used by the interrupt for time sharing Counter Var Word ' General purpose counter Del Var Word ' General purpose delay loop variable D_Number Var Word ' The number to display on the LEDS DP Var Byte ' Position of the decimal point Disp_Patt Var Byte ' Pattern to output to PortC Num Var Byte[5] ' Array to hold each digits value Digit0 Var PortA.0 ' Controls the first DIGIT on the LED Digit1 Var PortA.1 ' Controls the second DIGIT on the LED Digit2 Var PortA.2 ' Controls the third DIGIT on the LED Digit3 Var PortA.3 ' Controls the fourth DIGIT on the LED temperature var word TempC Var word Temp Var byte Float Var word V Var word Twist Var bit Dummy Var byte Sign var byte busy var bit DS18B20_12bit CON %01111111 ' 750ms, 0.0625°C DQ var PortA.4 ' ** Declare the bits and flags of the various registers ** T0IE Var INTCON.5 ' Timer0 Overflow Interrupt Enable T0IF Var INTCON.2 ' Timer0 Overflow Interrupt Flag GIE Var INTCON.7 ' Global Interrupt Enable PS0 Var OPTION_REG.0 ' Prescaler division bit-0 PS1 Var OPTION_REG.1 ' Prescaler division bit-1 PS2 Var OPTION_REG.2 ' Prescaler division bit-2 PSA Var OPTION_REG.3 ' Prescaler Assignment (1= assigned to WDT) ' (0= assigned to oscillator) T0CS Var OPTION_REG.5 ' Timer0 Clock Source Select (0=Internal clock) ' (1=External PORTA.4) ' Set TMR0 to interrupt GIE=0 ' Turn off global interrupts While GIE=1:GIE=0:Wend ' Make sure they are off PSA=0 ' Assign the prescaler to external oscillator PS0=0 ' Set the prescaler PS1=1 ' to increment TMR0 PS2=0 ' every 64th instruction cycle T0CS=0 ' Assign TMR0 clock to internal source TMR0=0 ' Clear TMR0 initially T0IE=1 ' Enable TMR0 overflow interrupt GIE=1 ' Enable global interrupts On Interrupt Goto Mult_Int ' Point to the interrupt handler TrisB=0 ' Make PortB outputs TrisA.0=0:TrisA.1=0:TrisA.2=0 ' Make only the specific bits of PortA outputs TrisA.3=0:TrisA.4=1 PortA=0:PortB=0 ' Clear PortB and PortA O_C=0 ' Clear the time share variable OWOut DQ, 1, [$CC, $4E, 0, 0, DS18B20_12bit] Output DQ ' Make Pin Output DQ=0 ' OneWire line Low PauseUs 480 ' Keep down for 480 µS Input DQ ' Make Pin Input PauseUs 70 ' Wait 70 µS W1: OWIN DQ,4,[busy] ' Check for still busy converting IF busy = 0 THEN W1 ' Still busy? then loop ' ** THE MAIN PROGRAM STARTS HERE ** Main: OWOut DQ, 1, [$CC, $44] OWOut DQ, 1, [$CC, $BE] OWIn DQ, 2, [temperature.byte0, temperature.byte1] If Temperature.15 then Temperature= ~Temperature +1 Twist = 1 Sign = 1 Endif Dummy = 625 * Temperature TempC = DIV32 10 TempC = (Temperature & $7FF) >> 4 Float = ((Temperature.Lowbyte & $0F ) * 25 )>>2 Temperature = TempC*100 + Float If Twist then V= 10000 - Temperature ' 25 C=12500 0 C=10000 -10 C=9000 Twist = 0 else V= 10000 + Temperature EndIf If V >= 10000 then ' Above 0 C. Temperature=V-10000 sign = " " else Temperature=10000-V ' Below 0 C. sign= "-" EndIf D_Number=Temperature/10 ' Place the value to display into D_NUMBER DP=0 ' Disable the decimal point Gosub Display ' Display the value For Del=0 to 100 ' Pause 10ms Pauseus 100 ' using smaller delays Next Inf: Goto Main ' Do it forever ' Build up the seperate digits of variable D_NUMBER ' into the array NUM. Each LED is assigned to each array variable. ' LED-0 (right) displays the value of NUM[0] ' LED-1 (middle) displays the value of NUM[1] ' LED-2 (lef) displays the value of NUM[2] ' The decimal point is placed by loading the variable DP ' with the LED of choice to place the point (0..5). where 1 is the farthest right LED ' and 0 disables the decimal point. Display: For LEDS=3 to 0 step -1 ' Loop for 4 digits (0-9999) Disable ' Disable the interrupt while we calculate Num[LEDS]=D_Number dig LEDS ' Extract the seperate digits into the array If D_Number<10 and LEDS=1 then Num[LEDS]=10 ' Zero Suppression for the second digit If D_Number<100 and LEDS=2 then Num[LEDS]=10 ' Zero Suppression for the Third digit If D_Number<1000 and LEDS=3 then Num[LEDS]=10 ' Zero Suppression for the Forth digit Enable ' Re-enable the interrupt Next ' INTERRUPT HANDLER ' Multiplexes the 4-digits ' Disable ' Disable all interupts during the interrupt handler Mult_Int: Lookup Num[O_C],[192,249,164,176,153,146,131,248,128,152,255],Disp_Patt ' Decode the segments for the LED ' Process the first display (farthest right) If O_C=0 then ' If it is our turn then Digit3=0 ' Turn OFF the fourth LED PortB=Disp_Patt ' Place the digit pattern on portC If DP=1 then PortB.7=0 ' Check the value of DP and Turn ON the decimal point Digit0=1 ' Turn ON the first LED Endif ' Process the second display If O_C=1 then ' If it is our turn then Digit0=0 ' Turn OFF the first LED PortB=Disp_Patt ' Place the digit pattern on portC If DP=2 then PortB.7=0 ' Check the value of DP and Turn ON the decimal point Digit1=1 ' Turn ON the second LED Endif ' Process the third display If O_C=2 then ' If it is our turn then Digit1=0 ' Turn OFF the second LED PortB=Disp_Patt ' Place the digit pattern on portC If DP=3 then PortB.7=0 ' Check the value of DP and Turn ON the decimal point Digit2=1 ' Turn ON the third LED Endif ' Process the fourth display If O_C=3 then ' If it is our turn then Digit2=0 ' Turn OFF the third LED PortB=Disp_Patt ' Place the digit pattern on portC If DP=3 then PortB.7=0 ' Check the value of DP and Turn ON the decimal point Digit3=1 ' Turn ON the fourth LED Endif O_C=O_C+1 ' Increment the time share counter If O_C>=4 then O_C=0 ' If it reaches 4 or over then clear it T0IF=0 ' Reset TMR0 interrupt flag Resume ' Exit the interrupt Enable ' Allow more interrupts
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Code:' Process the fourth display If O_C=3 then ' If it is our turn then Digit2=0 ' Turn OFF the third LED If sign="-" then PortB=%00111111 PortB.7=0 else PortB=Disp_Patt ' Place the digit pattern on portC endif If DP=3 then PortB.7=0 ' Check the value of DP and Turn ON the decimal point Digit3=1 ' Turn ON the fourth LED Endif
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Re: Thermo 7 segments - little problem
My final code, using for thermometer with two DS18B20. Works fine !
Code:; CATOD / ANOD COMUN ; merge foarte bine !!! ; VARIANTA 2 SENZORI !!! ; by Niculescu Dan, APRIL 2011 ; ; '====================================================================================== ; ; .oooO ; ( ) Oooo. ; \ ( ( ) ; \_) ) / ; (_/ ; @ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON DEFINE OSC 4 CMCON = 7 VRCON = 0 INTCON = 0 COMMON_0 VAR PORTA.0 COMMON_1 VAR PORTA.1 COMMON_2 VAR PORTA.2 COMMON_3 VAR PORTA.3 DQ VAR PORTA.4 DQ2 VAR PORTA.6 DP VAR PORTB.7 Temp Var Byte : Temp2 Var Byte Temperature Var Word : Temperature2 Var Word TempC Var Word : TempC2 Var Word I Var Byte : I2 Var Byte Sign Var Word : Sign2 Var Word Float Var Word : Float2 Var Word V Var Word : V2 Var Word Dummy Var Byte : Dummy2 Var Byte Busy Var Bit : Busy2 Var Bit Delay Var Word Valoare VAR Word Semn Var Word DIGIT_0 VAR BYTE DIGIT_1 VAR BYTE DIGIT_2 VAR BYTE DIGIT_3 VAR BYTE DS18B20_12bit CON %01111111 ' 750ms, 0.0625°C DS18B20_12bit2 CON %01111111 ' 750ms, 0.0625°C TrisB=%00000000 ' Make PortB outputs TrisA=%11110000 PortA=0:PortB=0 ' Clear PortB and PortA '====================================================================================== ' Init Sensor 1 OWOUT DQ, 1, [$CC, $4E, 0, 0, DS18B20_12bit] OWOut DQ, 1, [$CC, $48] ' Start temperature conversion OWOut DQ, 1, [$CC, $B8] OWOut DQ, 1, [$CC, $BE] Pause 50 OWIn DQ, 2, [temperature.byte0, temperature.byte1] ' Init Sensor 2 OWOUT DQ2, 1, [$CC, $4E, 0, 0, DS18B20_12bit2] OWOut DQ2, 1, [$CC, $48] ' Start temperature conversion OWOut DQ2, 1, [$CC, $B8] OWOut DQ2, 1, [$CC, $BE] Pause 50 OWIn DQ2, 2, [temperature2.byte0, temperature2.byte1] Pause 100 '====================================================================================== Main : If portA.7= 1 then valoare=temperature semn=sign Endif If portA.7= 0 then valoare=temperature2 semn=sign2 Endif Part1: ' Start temp.conv.Sensor1 OWOut DQ, 1, [$CC, $44] OWOut DQ, 1, [$CC, $BE] OWIn DQ, 2, [temperature.byte0, temperature.byte1] If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif Dummy = 625 * Temperature TempC = DIV32 10 TempC = (Temperature & $7FF) >> 4 Float = ((Temperature.Lowbyte & $0F ) * 25 )>>2 Temperature = TempC*100 + Float If Sign=1 then V= 10000 - Temperature else V= 10000 + Temperature EndIf If V >= 10000 then Temperature=V-10000 sign = " " else Temperature=10000-V sign = "-" EndIf Temperature=Temperature/10 '===================================== end part one Part2 : ' Start temp.conv.Sensor1 OWOut DQ2, 1, [$CC, $44] OWOut DQ2, 1, [$CC, $BE] OWIn DQ2, 2, [temperature2.byte0, temperature2.byte1] If Temperature2.15 then Temperature2= ~Temperature2 +1 Sign2 = 1 Endif Dummy2 = 625 * Temperature2 TempC2 = DIV32 10 TempC2 = (Temperature2 & $7FF) >> 4 Float2 = ((Temperature2.Lowbyte & $0F ) * 25 )>>2 Temperature2 = TempC2*100 + Float2 If Sign2=1 then V2= 10000 - Temperature2 else V2= 10000 + Temperature2 EndIf If V2 >= 10000 then Temperature2=V2-10000 sign2 = " " else Temperature2=10000-V2 sign2 = "-" EndIf Temperature2=Temperature2/10 '===================================== end part two Gosub Selectie Gosub Display ' B for Common CATOD;without B for Common ANOD Goto Main '====================================================================================== Selectie : IF semn ="-" then DIGIT_3="-" else DIGIT_3=" " ENDIF IF valoare DIG 2 = 0 THEN DIGIT_2 = " " ELSE DIGIT_2 = valoare dig 2 ENDIF DIGIT_1 = valoare dig 1 DIGIT_0 = valoare dig 0 RETURN '====================================================================================== Display: ' For Common ANOD for i=0 to 3 TEMP = DIGIT_3 : gosub segments COMMON_3 = 1 :gosub DelayBetweenEachDigit : COMMON_3 = 0 TEMP = DIGIT_2 : GOSUB segments COMMON_2 = 1 :gosub DelayBetweenEachDigit : COMMON_2 = 0 TEMP = DIGIT_1 : GOSUB segments COMMON_1 = 1 :DP = 0 : gosub DelayBetweenEachDigit : COMMON_1 = 0 : DP = 1 TEMP = DIGIT_0 : GOSUB segments COMMON_0 = 1 :gosub DelayBetweenEachDigit : COMMON_0 = 0 next i RETURN '====================================================================================== Displayb: ' For Common CATOD for i=0 to 3 TEMP = DIGIT_3 : gosub segmentsB COMMON_3 = 0 :gosub DelayBetweenEachDigit : COMMON_3 = 1 TEMP = DIGIT_2 : GOSUB segmentsB COMMON_2 = 0 : gosub DelayBetweenEachDigit : COMMON_2 = 1 TEMP = DIGIT_1 : GOSUB segmentsB COMMON_1 = 0 : DP = 1 : gosub DelayBetweenEachDigit : COMMON_1 = 1 : DP = 0 TEMP = DIGIT_0 : GOSUB segmentsB COMMON_0 = 0 : gosub DelayBetweenEachDigit : COMMON_0 = 1 next i RETURN '====================================================================================== segments: ; CONVERTS DATES TO 7 SEGMENT CODE for Common ANOD SELECT CASE TEMP CASE 0 : PortB=%11000000 ; 0=ON ; 1=OFF CASE 1 : PortB=%11111001 CASE 2 : PortB=%10100100 CASE 3 : PortB=%10110000 CASE 4 : PortB=%10011001 CASE 5 : PortB=%10010010 CASE 6 : PortB=%10000010 CASE 7 : PortB=%11111000 CASE 8 : PortB=%10000000 CASE 9 : PortB=%10010000 CASE "-" : PortB=%10111111 CASE " " : PortB=%11111111 END SELECT RETURN '====================================================================================== segmentsB: ; CONVERTS DATES TO 7 SEGMENT CODE for Common CATOD SELECT CASE TEMP CASE 0 : PortB=%00111111 ; 1=ON ; 0=OFF CASE 1 : PortB=%00000110 CASE 2 : PortB=%01011011 CASE 3 : PortB=%01001111 CASE 4 : PortB=%01100110 CASE 5 : PortB=%01101101 CASE 6 : PortB=%01111101 CASE 7 : PortB=%00000111 CASE 8 : PortB=%01111111 CASE 9 : PortB=%01101111 CASE "-" : PortB=%01000000 CASE " " : PortB=%00000000 END SELECT RETURN '====================================================================================== DelayBetweenEachDigit: ' DelayBetweenEachDigit ' --------------------- ' Produce delay of about 3 mSec ' Fine tuned with MPLAB StopWatch to get MainLoop = 1 sec For delay=1 to 5 @ nop next DELAY @ nop @ nop @ nop @ nop @ nop @ nop @ nop return '====================================================================================== END ' of story !!!
Last edited by fratello; - 22nd April 2011 at 08:50.
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Re: Thermo 7 segments - little problem
I try to use Mr.Darrel "DT_INTS-14.bas" to make another variant of my termometer using 4x7 segments LED, like this :
...but where I must put the value of temperature ?! Any advice, please ? Thanks !Code:@ __config _INTOSC_OSC_NOCLKOUT & _WDT_ON & _MCLRE_ON DEFINE OSC 4 CMCON = 7 VRCON = 0 INTCON = 0 DQ VAR PORTA.4 CLEAR SEGDEF VAR BYTE[3] Value VAR WORD Idx VAR BYTE Temp VAR BYTE digitloop VAR BYTE Blanking VAR BIT Temperature Var Word TempC Var Word I Var Byte Sign Var Word Float Var Word V Var Word Dummy Var Byte Busy Var Bit DS18B20_12bit CON %01111111 ' 750ms, 0.0625°C TrisB=0 ' Make PortB outputs TrisA.0=0:TrisA.1=0:TrisA.2=0 ' Make only the specific bits of PortA outputs TrisA.3=0:TrisA.4=1 PortA=0:PortB=0 ' Clear PortB and PortA INCLUDE "DT_INTS-14.bas" ' Base Interrupt System INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _DISP, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM TRISA = 0 TRISB = 0 @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts T1CON = $1 ' Init Sensor 1 OWOUT DQ, 1, [$CC, $4E, 0, 0, DS18B20_12bit] OWOut DQ, 1, [$CC, $48] ' Start temperature conversion OWOut DQ, 1, [$CC, $B8] OWOut DQ, 1, [$CC, $BE] Pause 50 OWIn DQ, 2, [temperature.byte0, temperature.byte1] Main: ' Start temp.conv.Sensor1 OWOut DQ, 1, [$CC, $44] OWOut DQ, 1, [$CC, $BE] OWIn DQ, 2, [temperature.byte0, temperature.byte1] If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif Dummy = 625 * Temperature TempC = DIV32 10 TempC = (Temperature & $7FF) >> 4 Float = ((Temperature.Lowbyte & $0F ) * 25 )>>2 Temperature = TempC*100 + Float If Sign=1 then V= 10000 - Temperature else V= 10000 + Temperature EndIf If V >= 10000 then Temperature=V-10000 sign = " " else Temperature=10000-V sign = "-" EndIf FOR Value = 0 TO 9999 GOSUB SetDisp PAUSE 500 NEXT Value GOTO Main '---[Set 7-seg patterns to WORD value]------------------------------------------ SetDisp: Blanking = 1 FOR Idx = 3 to 0 STEP -1 Temp = Value DIG Idx IF (Blanking AND Temp != 0) OR Idx = 0 THEN Blanking = 0 IF Blanking THEN Temp = 0 ELSE LookUp Temp,[132,175,193,137,170,152,144,143,128,136,210,251],Temp ENDIF SEGDEF(Idx) = Temp NEXT Idx RETURN '---[TMR1 - interrupt handler]-------------------------------------------------- DISP: T1CON.0 = 0 ; stop timer TMR1H = %11111100 TMR1L = %00011111 T1CON.0 = 1 ; restart timer PORTA = %1111 ; turn off all digits to prevent ghosting PORTB = SEGDEF(digitloop) ; put segment pattern to pin PORTA = ~(DCD digitloop) ; turn on the digit digitloop = digitloop + 1 IF digitloop = 4 then digitloop = 0 @ INT_RETURN
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Re: Thermo 7 segments - little problem
I try something like this
but without resultsCode:FOR x = 0 TO 9999 value=temperature GOSUB SetDisp PAUSE 500 NEXT x GOTO Main
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Re: Thermo 7 segments - little problem
I try to revive this topic ...
I found here (http://vnnik71.narod.ru/termo_ds18b20.html) schematic and hex file (even source code...) for an thermometer... It works absolutely great ! NO FLICKERING despite the absence of external quartz/HS oscillator !
How is made ?! I have no ideea ...
BUT ... in PBP this can be done ?!? I gave up to many LED display projects, because of this issue - annoying flickering ...
Know somebody a GOOD method to get a stable, sharp display ? Thanks in advance !
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Re: Thermo 7 segments - little problem
Although I can't open the sight I have a few questions. What is it you're trying to do? Improve upon project posted here or start from scratch?
What is the range of temperature you want to display?
What displays do you want to use? If flickering is a problem you could use a faster update rate but the display will only be as good as the quality of the display. I agree 7 segment LEDs are a dime a dozen but some are better than others. Although if you want large displays you may not be able to update them but will need to turn them on the whole time using FETs or transistors.
What is it ultimately you'd like to see from this project?
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Re: Thermo 7 segments - little problem
Thanks for reply !
So ... using as hardware - 16F628A @ 4 MHz and LED display KW4-311AVA, I built one termometer, using DS18B20, with different variants of software (presented in this topic). All my variants have this issue - display flickering, more or less, but present.
The hardware from the link posted above use same hardware, 16F628 @ 4 Mhz and same display. BUT ... no flickering ! The display look sharp and bright.
So ... I intend to build an termometer, using same hardware, but flicker-free ! And, despite searching this forum, I could not find any convenient version to apply.
This is why I asked for help ! Thanks in advance !
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Re: Thermo 7 segments - little problem
Tried a "variation" of code from post #20 :
...but I have some errors :Code:; Termo LED 7 seg '====================================================================================== @ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON, MCLR_OFF, LVP_OFF, CPD_OFF INCLUDE "DT_INTS-14.bas" ' Base Interrupt System INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts DEFINE OSC 4 CMCON = 7 VRCON = 0 INTCON = 0 Common_4 VAR PORTA.1 Common_3 VAR PORTA.0 Common_2 VAR PORTA.7 Common_1 VAR PORTA.6 DQ VAR PORTA.4 DP VAR PORTB.2 Temp Var Byte Temperature Var Word TempC Var Word I Var Byte Sign Var Word Float Var Word V Var Word Dummy Var Byte Busy Var Bit DIGIT_0 VAR BYTE DIGIT_1 VAR BYTE DIGIT_2 VAR BYTE DIGIT_3 VAR BYTE digit Var BYTE DS18B20_12bit CON %01111111 ' 750ms, 0.0625°C Data @0,20,215,76,69,135,37,36,87,4,5,255 PortA=%00000100 TrisA=%00111000 PortB=%11111111 TrisB=%00000000 ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _DISP, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts T1CON = $1 ' Init Sensor 1 OWOUT DQ, 1, [$CC, $4E, 0, 0, DS18B20_12bit] OWOut DQ, 1, [$CC, $48] ' Start temperature conversion OWOut DQ, 1, [$CC, $B8] OWOut DQ, 1, [$CC, $BE] Pause 50 OWIn DQ, 2, [temperature.byte0, temperature.byte1] Main: ' Start temp.conv.Sensor1 OWOut DQ, 1, [$CC, $44] OWOut DQ, 1, [$CC, $BE] OWIn DQ, 2, [temperature.byte0, temperature.byte1] If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif Dummy = 625 * Temperature TempC = DIV32 10 TempC = (Temperature & $7FF) >> 4 Float = ((Temperature.Lowbyte & $0F ) * 25 )>>2 Temperature = TempC*100 + Float If Sign=1 then V= 10000 - Temperature else V= 10000 + Temperature EndIf If V >= 10000 then Temperature=V-10000 sign = " " else Temperature=10000-V sign = "-" EndIf Temperature=Temperature/10 Gosub Selectie Goto Main '====================================================================================== Selectie : If sign = "-" then PortB = %11101111 else PortB = %11111111 endif IF Temperature DIG 2 = 0 THEN digit = " " else digit = Temperature dig 2 ENDIF read digit, DIGIT_2 digit = Temperature dig 1 read digit, DIGIT_1 digit = Temperature dig 0 read digit, DIGIT_0 Return '====================================================================================== Disp: T1CON.0 = 0 ; stop timer TMR1H = %11111100 TMR1L = %00011111 T1CON.0 = 1 ; restart timer Common_1 = 1 : PAUSE 1 : Common_1 = 0 PortB = DIGIT_2 Common_2 = 1 : PAUSE 1 : Common_2 = 0 PortB = DIGIT_1 Common_3 = 1 : DP = 0 : PAUSE 1 : Common_3 = 0 : DP = 1 PortB = DIGIT_0 Common_4 = 1 : PAUSE 1 : Common_4 = 0 @ INT_RETURN
ERROR Line 95: Syntax error. (ReEnterPBP.bas)
ERROR Line 128: Redefiniton of LABEL Vars_Saved. (ReEnterPBP.bas)
ERROR Line 128: Syntax error. (ReEnterPBP.bas)
Advices ?! Thanks !
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Re: Thermo 7 segments - little problem
DT_INTS only works with the MPASM assembler.
Your device statement indicates you are trying to use the old PM assembler.
But I can say that 1-Wire and ASM Interrupts don't get along very well.
1-Wire has very strict timing requirements. And ASM Interrupts have a tendancy to disturb that timing.
1-Wire commands take enough time that if you stop the interrupts to do a software OWOUT/IN ... it will cause blinking.
The only way I can see to scan LED's at a constant rate, and do 1-Wire I/O at the same time ... is to do the 1-Wire communications by Interrupts too.
Sorry, don't have sample code.
DT
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Re: Thermo 7 segments - little problem
Ok, I understand ...Thank You so much for advice ! I will try to figure out how doing 1-Wire by interrupts ...Regards !
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Re: Thermo 7 segments - little problem
There's an example of reading the DS18B20 without using OWOUT/IN here ...
http://support.melabs.com/content/389-TEMPX.pbp
It doesn't use timer interrupts. It uses pauses instead.
But it should give a good idea on how to read the sensor.
DT
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Re: Thermo 7 segments - little problem
Many thanks ! Now I wait for account validation ... for see the example. Thanks again !
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Re: Thermo 7 segments - little problem
I'm stuck ...at red lines bellow ...
I have no ideea how to find the value of temperatureCode:; Termo 7 seg '====================================================================================== @ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON, MCLR_OFF, LVP_OFF, CPD_OFF DEFINE OSC 4 CMCON = 7 VRCON = 0 INTCON = 0 Common_4 VAR PORTA.0 Common_3 VAR PORTA.1 Common_2 VAR PORTA.2 Common_1 VAR PORTA.3 DP VAR PORTB.7 Temp Var byte Temperature Var Word TempC Var Word I Var Byte Sign Var Word Float Var Word V Var Word Dummy Var Byte Busy Var Bit DIGIT_0 VAR BYTE DIGIT_1 VAR BYTE DIGIT_2 VAR BYTE DIGIT_3 VAR BYTE digit Var BYTE DQ VAR PORTA.4 DQ_DIR var TRISA.4 command var byte pis var byte TrisB=0 ' Make PortB outputs TrisA.0=0:TrisA.1=0:TrisA.2=0 ' Make only the specific bits of PortA outputs TrisA.3=0:TrisA.4=1 PortA=0:PortB=0 ' Clear PortB and PortA INTCON = %00100000 OPTION_REG = %10000000 ON INTERRUPT GOTO ISR INTCON = %10100000 '====================================================================================== Gosub init1820 ' Init the DS1820 command = $cc ' Issue Skip ROM command Gosub write1820 command = $44 ' Start temperature conversion Gosub write1820 Pause 2000 ' Wait 2 seconds for conversion to complete Gosub init1820 ' Do another init command = $cc ' Issue Skip ROM command Gosub write1820 MAIN : command = $be ' Read the temperature Gosub write1820 Gosub read1820 temperature = ?????? sign = ???? Gosub Selectie Goto Main '====================================================================================== Selectie : IF sign ="-" then DIGIT_3="-" else DIGIT_3=" " ENDIF IF TEMPERATURE DIG 2 = 0 THEN DIGIT_2 = " " ELSE DIGIT_2 = TEMPERATURE dig 2 ENDIF DIGIT_1 = TEMPERATURE dig 1 DIGIT_0 = TEMPERATURE dig 0 RETURN '====================================================================================== DISABLE ISR: for i=0 to 4 TEMP = DIGIT_3 : gosub segments COMMON_1 = 1 : PAUSE 1 : COMMON_1 = 0 TEMP = DIGIT_2 : GOSUB segments COMMON_2 = 1 : PAUSE 1 : COMMON_2 = 0 TEMP = DIGIT_1 : GOSUB segments COMMON_3 = 1 : DP = 0 : PAUSE 1 : COMMON_3 = 0 : DP = 1 TEMP = DIGIT_0 : GOSUB segments COMMON_4 = 1 : PAUSE 1 : COMMON_4 = 0 next i segments: ; CONVERTS DATES TO 7 SEGMENT CODE for Common ANOD SELECT CASE TEMP CASE 0 : PortB=%11000000 ; 0=ON ; 1=OFF CASE 1 : PortB=%11111001 CASE 2 : PortB=%10100100 CASE 3 : PortB=%10110000 CASE 4 : PortB=%10011001 CASE 5 : PortB=%10010010 CASE 6 : PortB=%10000010 CASE 7 : PortB=%11111000 CASE 8 : PortB=%10000000 CASE 9 : PortB=%10010000 CASE "-" : PortB=%10111111 CASE " " : PortB=%11111111 END SELECT return INTCON.2=0 RESUME ENABLE '====================================================================================== ' Initialize DS1820 and check for presence init1820: Low DQ ' Set the data pin low to init Pauseus 500 ' Wait > 480us DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 100 ' Wait > 60us If DQ = 1 Then Pause 500 Goto main ' Try again Endif Pauseus 400 ' Wait for end of presence pulse Return ' Write "command" byte to the DS1820 write1820: For pis = 1 To 8 ' 8 bits to a byte If command.0 = 0 Then Gosub write0 ' Write a 0 bit Else Gosub write1 ' Write a 1 bit Endif command = command >> 1 ' Shift to next bit Next pis Return ' Write a 0 bit to the DS1820 write0: Low DQ Pauseus 60 ' Low for > 60us for 0 DQ_DIR = 1 ' Release data pin (set to input for high) Return ' Write a 1 bit to the DS1820 write1: Low DQ ' Low for < 15us for 1 @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 60 ' Use up rest of time slot Return ' Read temperature from the DS1820 read1820: For pis = 1 To 16 ' 16 bits to a word temperature = temperature >> 1 ' Shift down bits Gosub readbit ' Get the bit to the top of temp Next pis Return ' Read a bit from the DS1820 readbit: temperature.15 = 1 ' Preset read bit to 1 Low DQ ' Start the time slot @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) If DQ = 0 Then temperature.15 = 0 ' Set bit to 0 Endif Pauseus 60 ' Wait out rest of time slot Return end
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Re: Thermo 7 segments - little problem
I can't figure SIGN yet, but TEMPERATURE is set in READ1820 one bit at a time.
Robert
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Re: Thermo 7 segments - little problem
Thanks for reply !
...I know that, but on display I have only "0" ...so I think I need to ...re-define temperature ?!?
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Re: Thermo 7 segments - little problem
I still have no clue how the sign is set, but you GOTO MAIN from within INIT1820; not a good thing, messes up the stack.
Robert
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Re: Thermo 7 segments - little problem
Don't you need something like this at bottom of READ1820?Code:If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif
Robert
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Re: Thermo 7 segments - little problem
No matter what temperature I set to DS18B20 ; the display show always "0,1".
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Re: Thermo 7 segments - little problem
It's beyond on my understanding and mental capabilities
Code:; Termometru 7 segmente '====================================================================================== ;@ DEVICE pic16F628A, intOSC_osc_noclkout, WDT_OFF, PWRT_ON, MCLR_OFF, LVP_OFF, CPD_OFF DEFINE OSC 4 CMCON = 7 VRCON = 0 INTCON = 0 Common_4 VAR PORTA.0 Common_3 VAR PORTA.1 Common_2 VAR PORTA.2 Common_1 VAR PORTA.3 DP VAR PORTB.7 Temp Var byte Temperature Var Word TempC Var Word I Var Byte Sign Var Word Float Var Word V Var Word Dummy Var Byte Busy Var Bit DIGIT_0 VAR BYTE DIGIT_1 VAR BYTE DIGIT_2 VAR BYTE DIGIT_3 VAR BYTE digit Var BYTE DQ VAR PORTA.4 DQ_DIR var TRISA.4 command var byte pis var byte TrisB=0 ' Make PortB outputs TrisA.0=0:TrisA.1=0:TrisA.2=0 ' Make only the specific bits of PortA outputs TrisA.3=0:TrisA.4=1 PortA=0:PortB=0 ' Clear PortB and PortA INCLUDE "DT_INTS-14.bas" ' Base Interrupt System INCLUDE "ReEnterPBP.bas" ' Include if using PBP interrupts ASM INT_LIST macro ; IntSource, Label, Type, ResetFlag? INT_Handler TMR1_INT, _show, PBP, yes endm INT_CREATE ; Creates the interrupt processor ENDASM T1CON = $31 ; Prescaler=8, TMR1ON @ INT_ENABLE TMR1_INT ; enable Timer 1 interrupts '====================================================================================== Gosub init1820 ' Init the DS1820 command = $cc ' Issue Skip ROM command Gosub write1820 command = $44 ' Start temperature conversion Gosub write1820 Gosub init1820 ' Do another init command = $cc ' Issue Skip ROM command Gosub write1820 MainLOOP: command = $be ' Read the temperature Gosub write1820 Gosub read1820 TEMPERATURE = ((tempERATURE>> 1)*100)+((TEMPERATURE.0*5)*10) Gosub Selectie Goto MainLOOP '====================================================================================== Selectie : IF sign ="-" then DIGIT_3="-" else DIGIT_3=" " ENDIF IF TEMPERATURE DIG 2 = 0 THEN DIGIT_2 = " " ELSE DIGIT_2 = TEMPERATURE dig 2 ENDIF DIGIT_1 = TEMPERATURE dig 1 DIGIT_0 = TEMPERATURE dig 0 RETURN '====================================================================================== show: for i=0 to 4 TEMP = DIGIT_3 : gosub segments COMMON_1 = 1 : PAUSE 1 : COMMON_1 = 0 TEMP = DIGIT_2 : GOSUB segments COMMON_2 = 1 : PAUSE 1 : COMMON_2 = 0 TEMP = DIGIT_1 : GOSUB segments COMMON_3 = 1 : DP = 0 : PAUSE 1 : COMMON_3 = 0 : DP = 1 TEMP = DIGIT_0 : GOSUB segments COMMON_4 = 1 : PAUSE 1 : COMMON_4 = 0 next i segments: ; CONVERTS DATES TO 7 SEGMENT CODE for Common ANOD SELECT CASE TEMP CASE 0 : PortB=%11000000 ; 0=ON ; 1=OFF CASE 1 : PortB=%11111001 CASE 2 : PortB=%10100100 CASE 3 : PortB=%10110000 CASE 4 : PortB=%10011001 CASE 5 : PortB=%10010010 CASE 6 : PortB=%10000010 CASE 7 : PortB=%11111000 CASE 8 : PortB=%10000000 CASE 9 : PortB=%10010000 CASE "-" : PortB=%10111111 CASE " " : PortB=%11111111 END SELECT return @ INT_RETURN '====================================================================================== ' Initialize DS1820 and check for presence init1820: Low DQ ' Set the data pin low to init Pauseus 500 ' Wait > 480us DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 100 ' Wait > 60us If DQ = 1 Then Pause 500 Goto mainLOOP ' Try again Endif Pauseus 400 ' Wait for end of presence pulse Return ' Write "command" byte to the DS1820 write1820: For pis = 1 To 8 ' 8 bits to a byte If command.0 = 0 Then Gosub write0 ' Write a 0 bit Else Gosub write1 ' Write a 1 bit Endif command = command >> 1 ' Shift to next bit Next pis Return ' Write a 0 bit to the DS1820 write0: Low DQ Pauseus 60 ' Low for > 60us for 0 DQ_DIR = 1 ' Release data pin (set to input for high) Return ' Write a 1 bit to the DS1820 write1: Low DQ ' Low for < 15us for 1 @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 60 ' Use up rest of time slot Return ' Read temperature from the DS1820 read1820: For pis = 1 To 16 ' 16 bits to a word temperature = temperature >> 1 ' Shift down bits Gosub readbit ' Get the bit to the top of temp Next pis If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif Return ' Read a bit from the DS1820 readbit: temperature.15 = 1 ' Preset read bit to 1 Low DQ ' Start the time slot @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) If DQ = 0 Then temperature.15 = 0 ' Set bit to 0 Endif Pauseus 60 ' Wait out rest of time slot Return end
ERROR Line 23: Redefinition of VAR. (DT_INTS-14.bas) ?!?
Can not be done a simple termometer with LED display ?
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Re: Thermo 7 segments - little problem
Check the include, you used the same variable.
Robert
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Re: Thermo 7 segments - little problem
Found it :
"wsave VAR BYTE $20 SYSTEM ' location for W if in bank0
;wsave VAR BYTE $70 SYSTEM ' alternate save location for W "
...
But now I have nothing on display ?!
Last edited by fratello; - 2nd July 2013 at 15:01.
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Re: Thermo 7 segments - little problem
I can only suggest to post all your most recent code. Maybe a senior can spot something.
Robert
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Re: Thermo 7 segments - little problem
OK, I will follow Your advice ...
This is the last attempt, not-working (just "000" on display). Already feel like I came out of patience with this problem
Code:' Pulse counter - attempt to converted for LED display termometer ' ============= ' ' File name : Count_Display.bas ' Company : Mister E ' Programmer : Steve Monfette ' Date : 27/12/2004 ' Device : PIC16F628A ' ' ' This program display to 3 x 7 segments dislay the result of ' pulses count on PORTA.4 pin/sec. ' ' Hardware connection : ' --------------------- ' 1. 3 X 7 segments display on PORTB<7:0> ' 2. 3 X PNP transistor on PORTA<3:0> to drive common anode ' of each 7 segments display ' ' ' Programming mode and PIC define ' ------------------------------- ' ;@ __config _HS_OSC & _WDT_ON & _PWRTE_ON & _LVP_OFF CMCON=7 ' ADDED FOR PIC16F628A DEFINE OSC 20 ' use 20 MHZ oscillator ' I/O Definition ' -------------- ' TRISA = %11111000 ' PORTA : <2:0> outputs to common Anode of 7 segment ' 1. PORTA.0 More significant ' 2. PORTA.2 Less significant ' : PORTA.4 input for signal ' TRISB = 0 ' PORTB connected to 7 segments ' B0 : segment a ' B1 : segment b ' B2 : segment c ' B3 : segment d ' B4 : segment e ' B5 : segment f ' B6 : segment g ' B7 : segment decimal dot ' Internal EEPROM definition ' -------------------------- ' data @0,192,249,164,176,153,146,130,248,128,144 ' table to convert ' numbers to 7 segments ' pattern output when ' drive invert ' Interrupt and register definition ' --------------------------------- OPTION_REG = %1111000 ' TMR0 clock source : RA4/T0CKI ' increment on low to high transition ' Prescaler assign to WDT ' WDT rate 1:1 ' INTCON = %10100000 ' Enable global interrupt ' Disable EE write interrupt ' Enable TMR0 overflow interrupt ' Variable definition ' ------------------- ' DisplayPort var PORTB ' Port for 7 Segments ;ClockInput var PORTA.4 ' Input pin for signal _7Seg1 con 14 ' enable more significant 7 segment display _7Seg2 con 13 ' enable mid significant 7 segment display _7Seg3 con 11 ' enable less significant 7 segment display Digit_1 var byte ' Hundreds digit Digit_2 var byte ' Tenth digit Digit_3 var byte ' Unit digit ToBeDisplay var word ' Result of count to be send to 7 segment display Display var byte ' Temp variable DisplayLoop var byte ' Delay var word ' Variable for Delay loop OverFlowVar var word ' Thousands var bit ' Flag for count >= 1000 & < 10 000 TenThousands var bit ' Flag for count >= 10 000 ;=========================================== Temp Var byte Temperature Var Word TempC Var Word I Var Byte Sign Var Word DQ VAR PORTA.4 DQ_DIR var TRISA.4 command var byte pis var byte ;============================================ ' Variable and software initialisation ' ------------------------------------ ' tobedisplay = 0 ' set initial value of count TMR0 = 0 ' reset prescaller On interrupt GoTo SetVarToBeDisplay Gosub init1820 ' Init the DS1820 command = $cc ' Issue Skip ROM command Gosub write1820 command = $44 ' Start temperature conversion Gosub write1820 Gosub init1820 ' Do another init command = $cc ' Issue Skip ROM command Gosub write1820 MainLoop: command = $be ' Read the temperature Gosub write1820 Gosub read1820 ' MainLoop ' --------- ' ' 1. display the result of the count on RA4 pin ' 2. refresh display ' 3. reset Timer0 ' 4. reload prescaler. ' ' Duration of the procedure : 1 sec ' fine tuned by DelayBetweenEachDisplay Sub ' ' Looping 1 sec and get results of the pulse count in ' TMR0 + OverFlowVar ' DisplayRefresh: ' ' Testing amount of count ' ----------------------- ' ' Get the result of count and place decimal point flag ' on the according 7 segments ' 'If tobedisplay>= 1000 Then 'tobedisplay = tobedisplay / 10 'Else ' tenthousands = 0 ' thousands = 1 'EndIf ' ' convert digit to 7 segment output pattern ' ----------------------------------------- display=ToBeDisplay dig 2 ' Read hundreds digit read display, digit_1 ' Convert hundreds if thousands==1 then digit_1=digit_1 & $7F ' enable decimal dot ' by clearing PORTB.7 display=ToBeDisplay dig 1 ' Read tenths digit read display, digit_2 ' Convert tens if tenthousands==1 then digit_2=digit_2 & $7F ' enable decimal dot ' ' by clearing PORTB.7 display=ToBeDisplay dig 0 ' Read units digit read display, digit_3 ' Convert units ' ' ' Send digit to 7 segments ' ------------------------ For displayloop = 0 To 111 ' loop for about 1 sec ' display hundreds ' ---------------- PORTA=_7seg1 ' enable hundreds 7 segment displayport = digit_1 ' display GoSub DelayBetweenEachDigit ' display tenth ' ------------- PORTA=_7seg2 ' enable tenth 7 segment displayport = digit_2 ' display GoSub DelayBetweenEachDigit ' display units ' ------------- PORTA=_7seg3 ' enable unit 7 segment displayport = digit_3 ' display GoSub DelayBetweenEachDigit Next ToBeDisplay = Temperature TMR0 = 0 ' reset prescaller GoTo DisplayRefresh DelayBetweenEachDigit: ' DelayBetweenEachDigit ' --------------------- ' Produce delay of about 3 mSec ' ' Fine tuned with MPLAB StopWatch to get MainLoop = 1 sec ' For delay = 1 To 307 @ nop Next @ nop @ nop @ nop @ nop @ nop @ nop @ nop Return disable SetVarToBeDisplay: ' ' SetVarToBeDisplay ' ----------------- ' interrupt routine of TMR0 overflow ' ' Reset prescaller ' Reset overflow flag ' Temperature = ((tempERATURE>> 1)*100)+((TEMPERATURE.0*5)*10) INTCON.2 = 0 ' clear overflow flag TMR0 = 0 ' reload TMR0 Resume enable '====================================================================================== ' Initialize DS1820 and check for presence init1820: Low DQ ' Set the data pin low to init Pauseus 500 ' Wait > 480us DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 100 ' Wait > 60us If DQ = 1 Then Pause 500 Goto mainLOOP ' Try again Endif Pauseus 400 ' Wait for end of presence pulse Return ' Write "command" byte to the DS1820 write1820: For pis = 1 To 8 ' 8 bits to a byte If command.0 = 0 Then Gosub write0 ' Write a 0 bit Else Gosub write1 ' Write a 1 bit Endif command = command >> 1 ' Shift to next bit Next pis Return ' Write a 0 bit to the DS1820 write0: Low DQ Pauseus 60 ' Low for > 60us for 0 DQ_DIR = 1 ' Release data pin (set to input for high) Return ' Write a 1 bit to the DS1820 write1: Low DQ ' Low for < 15us for 1 @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) Pauseus 60 ' Use up rest of time slot Return ' Read temperature from the DS1820 read1820: For pis = 1 To 16 ' 16 bits to a word temperature = temperature >> 1 ' Shift down bits Gosub readbit ' Get the bit to the top of temp Next pis If Temperature.15 then Temperature= ~Temperature +1 Sign = 1 Endif Return ' Read a bit from the DS1820 readbit: temperature.15 = 1 ' Preset read bit to 1 Low DQ ' Start the time slot @ nop ' Delay 1us at 4MHz DQ_DIR = 1 ' Release data pin (set to input for high) If DQ = 0 Then temperature.15 = 0 ' Set bit to 0 Endif Pauseus 60 ' Wait out rest of time slot Return ;================================================= END
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