please help

[gsingh]

hello friends,

 

I want to display the word ‘TEMPERATURE:” on 16*2 HT9170 LCD. But instead of displaying “TEMPERATURE:” , it is displaying “VGORGRCVWRG:”.

 

here one thing to note is each character in “VGORGRCVWRG” leads the corresponding character in “TEMPERATURE:” by 2.

i.e, T u V

      E f G

     M n O

etc.

[dagakshay]

paste you code here lket me check out… and colone “:” sign is printer on it place properly????

[Kunal]

had you configured LCD properly in programing? its must required..

[gsingh]

@dagakshay:  ya colon sign(‘:’) is appearing…..i m pasting the code…plz hav a look….

 

;OBJECTIVE: TO MAKE A TEMPERATURE INDICATOR AND DISPLAY THE TEMPERATURE ON LCD
;TEMP_INDIC
;MICROCONTROLLER USED: AT89S52
;OTHER ICs USED: ADC0804

;

---

HARDWARE

---

;HARDWARE DECLARATION
LCDPORT EQU P0
ADCPORT EQU P1
READ EQU P3.0
WRITE EQU P3.1
INTR EQU P3.2
LCDRS EQU P3.3
LCDEN EQU P3.4

;

---

START

---

;START
ORG 0000H
LJMP POWERON

;INTERRUPT VECTOR TABLE

ORG 0003H
RETI
ORG 000BH
RETI
ORG 0013H
RETI
ORG 001BH
RETI
ORG 0023H
RETI
ORG 002BH
RETI

;

---

POWERON

---

ORG 0033H

POWERON: MOV SP,#70H
         MOV P0,#0FFH
         MOV P1,#0FFH
         MOV P2,#0FFH
         MOV P3,#0FFH
         MOV IE,#00H
         MOV IP,#00H
         SETB READ       
         SETB WRITE 

         SETB INTR 
         ACALL LONGDELAY
         ACALL INITIALIZE
         ACALL DELAY
         ACALL SENDMSG1
      

;

---

MAINLOOP

---

MAINLOOP:
CLR WRITE
ACALL SHORTDELAY
SETB WRITE
LB1: JB INTR,LB1
     ACALL SHORTDELAY
     CLR READ
     MOV 30H,ADCPORT
     SETB INTR
     MOV A,30H
     ACALL SENDDATA
     SETB READ
     ACALL SHORTDELAY
LJMP MAINLOOP

;

---

LCD INITIALIZATION

---

INITIALIZE:
MOV A,#01H                ;CLEAR DISPLAY
ACALL SENDCMD
ACALL DELAY

MOV A,#02H                ;CURSOR AT HOME POSITION
ACALL SENDCMD
ACALL DELAY

MOV A,#38H                ;FUNCTION MODE SET
ACALL SENDCMD
ACALL DELAY

MOV A,#38H                ;FUNCTION MODE SET
ACALL SENDCMD
ACALL DELAY

MOV A,#38H                ;FUNCTION MODE SET
ACALL SENDCMD
ACALL DELAY

MOV A,#06H                ;ENTRY MODE SET
ACALL SENDCMD
ACALL DELAY

MOV A,#0EH                ;DISPLAY ON/OFF
ACALL SENDCMD
ACALL DELAY

MOV A,#01H                ;CLEAR DISPLAY
ACALL SENDCMD
ACALL DELAY

MOV A,#02H                ;CURSOR AT HOME POSITION
ACALL SENDCMD
ACALL DELAY
RET

;

---

MESSAGE 1

---

CODE: DB ‘TEMPERATURE:’   

SENDMSG1:
MOV DPTR,#CODE
MOV R0,#12D
MOV R1,#0D
LB2: MOV A,R1
     MOVC A,@A+DPTR
     ACALL SENDDATA
     ACALL DELAY
     INC R1
     DJNZ R0,LB2
RET  

;

---

CODE FOR SENDING COMMAND TO LCD

---

SENDCMD:
CLR LCDRS
MOV LCDPORT,A
SETB LCDEN                 ;A HIGH->LOW PULSE AT LCDEN   
ACALL DELAY
CLR LCDEN
ACALL DELAY
SETB LCDRS
RET  

;

---

CODE FOR SENDIND DATA TO LCD

---

SENDDATA:
SETB LCDRS
MOV LCDPORT,A
SETB LCDEN
ACALL DELAY
CLR LCDEN
ACALL DELAY
CLR LCDRS
RET

;

---

TIME DELAYS

---

DELAY:
     MOV R2,#20D
LB3: MOV R3,#250D
LB4: DJNZ R3,LB4
     DJNZ R2,LB3
RET

SHORTDELAY:
     MOV R4,#50D
LB5: DJNZ R4,LB5
RET

LONGDELAY:
     MOV R5,#10D
LB6: MOV R6,#100D
LB7: MOV R7,#150D
LB8: DJNZ R7,LB8
     DJNZ R6,LB7
     DJNZ R5,LB6  
RET
END

[gsingh]

thnx for helping guyz….that was just a hardware problem…..one pin of mic. controller wasn’t properly connected to one of the pins of lcd….

[Author]

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