I have to check the signal after every one second and plot the same.

I tried displaying the signal upto first 8 vertical columns and repeat the process. It worked.

I used the following subroutine:

movlw 0xB2///page 2
movwf PORTD
call SND_CMD

movlw 0x10
movwf PORTD
call SND_CMD
movlw 0x00
movwf PORTD
call SND_CMD////column 0

call sig_strength////subroutine to check the signal strength and display corresponding number of pixels in a single column

////TEMP3,TEMP4,TEMP5,TEMP6,TEMP7,TEMP8,TEMP9 are initialized to zero


movf TEMP1,0//////TEMP1 is the current signal stregth value
movwf TEMP2
movf TEMP3,0
movwf PORTD
call SND_DTA/////subroutine to display pixels on graphic lcd
movf TEMP4,0
movwf PORTD
call SND_DTA
movf TEMP5,0
movwf PORTD
call SND_DTA
movf TEMP6,0
movwf PORTD
call SND_DTA
movf TEMP7,0
movwf PORTD
call SND_DTA
movf TEMP8,0
movwf PORTD
call SND_DTA
movf TEMP9,0
movwf PORTD
call SND_DTA

return

The above subroutine worked.
For the next second interval I have to make changes to the above subroutine

and so on till 8 seconds


I have to keep shifting the previous value signals forward

I used 8 similar subroutines with few changes and it worked


But I am using 128x64 graphic lcd

There will be 128 one second intervals

if I use the approach as above my code will be getting too longer as

I will have to use 128 subroutines
Is there an efficient way to solve this problem?

If anyone has an idea, please let me know

Thanks

 

Look at the indirect addressing section of the datasheet using FSR and INDF.
I think that should help a lot.