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clock using pic16f84a with lcd and keypad asm

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newwbies

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hello i really need an asm program in this.. i have already the clock program but i cant seem to set the time with the keypad to the lcd.. i really hope you could help me.. :'(
 

Hi,

You need to post your code, either use the # tags to insert the code or zip it.
 

Ahmm hello.. this is the code. Im still new in writing asm codes....



Code:
	Processor 16F84A
	#include "p16F84A.inc"
	__CONFIG       _CP_OFF & _PWRTE_OFF & _WDT_OFF & _XT_OSC
;Automatic Fish Feeder


	#Define		glatch	PORTA,3
	#Define		lcd_e	PORTA,2
	#Define		lcd_rw	PORTA,1
	#Define		lcd_rs	PORTA,0
	
	org 0x00
	mhz			EQU D'4'	
	del1	equ	0ch
	del2	equ	0dh
	del3	equ 	0eh
	hour_hi	equ	0fh
	hour_lo	equ	10h
	min_hi	equ	11h
	min_lo	equ	12h
	sec_hi	equ	13h
	sec_lo	equ	14h
	temp	equ	15h
	count1	equ	16h
	count2	equ	17h
	count3	equ	18h
	count4	equ	19h

	ncode1	equ	1ah
	ncode2	equ	1bh
	ncode3	equ	1ch
	ncode4	equ	1dh
	ncode5	equ	1eh
	ncode6	equ	1fh	
	key	equ	20h
	accu	equ	21h
dcnt0		EQU 22h ; delay counter 0
dcnt1		EQU 23h ; delay counter 1
dcnt2		EQU	24h
;temp 		equ 25h

	goto 	Main
	
	org	0x04

	goto	Main


;kani Setup Output Port
Main
	bsf	STATUS,5  ;switch to bank 1
	movlw	04h	; PORTA output RA0 to RA4 
	movwf	TRISA
	movlw	00h
	movwf	TRISB
	bcf		STATUS,5  ;switch back to bank 0
	clrf	PORTA
	clrf	PORTB
	btfss	PORTA,2
	call 	KEYPAD
	call  	settime
	btfsc  PORTA,2
	call 	input
	call	circle
		
settime		
		movlw	0x00
		movwf	hour_hi
		movlw	0x00
		movwf	hour_lo
		movlw	0x00
		movwf	min_hi
		movlw	0x00
		movwf	min_lo
		movlw	0x00
		movwf	sec_hi
		movlw	0x00
		movwf	sec_lo
		;call 	line3
		call 	lcd_init
		call 	line3
;out1	movlw d'150'
;		call udelay
;		decfsz dcnt2, F
;		goto out1
		call	displaytext
;out1	movlw d'150'
		;call udelay
		;decfsz dcnt2, F
		;goto out1
		call	curhom
out2	movlw d'150'
		call udelay
		decfsz dcnt2, F
		goto out2

		;call 	line2
		movlw 0xc6
		call lcd_cmd
		call 	displaytime
		
out3	movlw d'150'
		call udelay
		decfsz dcnt2, F
		goto out3

;;input from the keypad
		

		
circle
		btfsc   PORTA,2
		call 	input
		call	delay
		;call	line2
		movlw	0xc6
		call lcd_cmd
		call 	displaytime
		incf	sec_lo,1
		movlw	0x0a
		subwf	sec_lo,0
		btfss	STATUS,0
		goto	circle
		goto	c_sechi

c_sechi
		clrf	sec_lo
		incf	sec_hi,1
		movlw	0x06
		subwf 	sec_hi,0
		btfss	STATUS,0
		goto	circle
		goto	c_minlo

c_minlo
		clrf	sec_hi
		incf	min_lo,1
		movlw	0x0a
		subwf	min_lo,0
		btfss	STATUS,0
		goto	circle
		goto	c_minhi

c_minhi
		clrf	min_lo
		incf	min_hi,1
		movlw	0x06
		subwf 	min_hi,0
		btfss	STATUS,0
		goto	circle
		goto	testhi

testhi	
		clrf	min_hi
		movlw	0x02
		subwf	hour_hi,0
		btfss	STATUS,0
		goto	hi1
		goto	testlow

testlow	
		incf	hour_lo,1
		movlw	0x04
		subwf	hour_lo,0
		btfss	STATUS,0
		goto	low1
		goto	hi2

hi1
		incf	hour_lo,1
		movlw 	0x0a
		subwf	hour_lo,0
		btfss	STATUS,0
		goto	circle
		goto	low2

low1
		goto 	circle
		
hi2
		clrf	hour_lo
		clrf	hour_hi
		goto	circle

low2
		incf	hour_hi,1
		clrf	hour_lo
		goto	circle

;delay
		;movlw	0x10
		;movwf	del3
;loop1	decfsz	del1,1
		;goto	loop1	
	;	decfsz	del2,1
	;	goto	loop1
	;	decfsz	del3,1
	;	goto	loop1
		;return
delay:
loop1	decfsz	08h, 1
			goto	loop1
			decfsz	09h, 1
			goto	loop1
			decfsz	0Ah, 1
			goto	loop1
			return
;**************************************************
delay5
		movlw	0x12	; delay 50us (18*3+2us)
		movwf	count1
d11		
		decfsz	count1,F	
		goto 	d11		
		return
;***************************************************
delay30	
		movlw	0x20	; delay 32ms
		movwf	count2
r2		movlw	0xFA	; cca. 1ms (250*4us)	  
		movwf	count1
r1		nop
		decfsz	count1,F	
		goto 	r1		
		decfsz	count2,F	
		goto 	r2		
		return
;***************************************************
delay200	
		movlw	0xC8	; delay 200ms
		movwf	count2
t2		movlw	0xFA	; cca. 1ms (250*4us)	  
		movwf	count1
t1		nop
		decfsz	count1,F	
		goto 	t1		
		decfsz	count2,F	
		goto 	t2		
		return
;************************************************************************
	
lcd_init
		call	delay200
		bsf		STATUS,RP0
		movlw	0x00
		movwf	TRISB
		bcf		STATUS,RP0
		bsf		glatch
		movlw	0x3F
		call	lcd_cmd
		call	delay30
		movlw 	0x0E
		call	lcd_cmd
		call	delay30
		movlw	0x06
		call 	lcd_cmd
		call	delay30
		movlw	0x01
		call 	lcd_cmd
		bcf		glatch
		return

lcd_cmd
	nop
	bcf	PORTA,0
	nop
	movwf	PORTB
	nop
;	bsf	PORTA,3
	bcf	PORTA,1
	nop
	nop
	bsf	PORTA,1
	nop
	nop
	bcf	PORTA,1
	nop
	nop
	;	bcf	PORTA,3
	call	delay5
	;bcf		lcd_rw
		;nop
		;bcf		lcd_rs
		;nop
		;movwf	PORTB
		;nop
		;bsf		glatch
		;bcf		lcd_e
		;nop
		;nop
		;bsf		lcd_e
		;nop
		;nop
		;bcf		lcd_e
		;nop
		;nop
		;bcf		glatch
		;call	delay5
		return

lcd_data
		
		nop
		bsf	PORTA,0
		nop
		movwf	PORTB
		nop
		;bsf	PORTA,3
		bcf	PORTA,1
		nop
		nop
		bsf	PORTA,1
		nop
		nop
		bcf	PORTA,1
		nop
		nop
;	bcf	PORTA,3
		call	delay5
		;bcf		lcd_rw
		;nop
		;bsf		lcd_rs
		;nop		
		;movwf	PORTB
		;nop
		;bsf		glatch
		;bcf		lcd_e
		;nop
		;nop
		;bsf		lcd_e
		;nop
		;nop
		;bcf		lcd_e
		;nop
		;nop
		;bcf		glatch
		;call	delay5
		return
line1
	movlw	0x80
	call	lcd_cmd
	return
	
line2	
	movlw	0xC0	
	call	lcd_cmd
 	return

line3
	movlw	0x94 
	call	lcd_cmd
 	return

shiftr	
	movlw	0x0a
	call	lcd_cmd
	return

curhom
	movlw	0x02
	call	lcd_cmd
	return

displaytime
	movf	hour_hi,0
	movwf	count3
	call	text
	call	lcd_data
	movf	hour_lo,0
	movwf	count3
	call	text
	call	lcd_data
	movlw	0x0a
	movwf	count3
	call 	text
	call	lcd_data
	movf	min_hi,0
	movwf	count3
	call	text
	call	lcd_data
	movf	min_lo,0
	movwf	count3
	call	text
	call	lcd_data
	movlw	0x0a
	movwf	count3
	call 	text
	call	lcd_data
	movf	sec_hi,0
	movwf	count3
	call	text
	call	lcd_data
	movf	sec_lo,0
	movwf	count3
	call	text
	call	lcd_data	
	return
displaytext
	;bsf		glatch
	call	line3
	movlw	0x12
	movwf	count4
	movlw	0x0b
	movwf	count3
scr2	
	call	text
	call	lcd_data
	incf	count3,F	
	decfsz  count4,F
	goto	scr2
	;bcf		glatch
	return
	

	ORG	0x0300
text		
	movlw	0x03
	movwf	PCLATH
	movf	count3,W
	addwf	PCL,F
	retlw	0x30 ;0
	retlw	0x31 ;1
	retlw	0x32 ;2
	retlw	0x33 ;3
	retlw	0x34 ;4
	retlw	0x35 ;5
	retlw	0x36 ;6
	retlw	0x37 ;7
	retlw	0x38 ;8
	retlw	0x39 ;9
	retlw	0x3a ;:
	retlw 	0x20
	retlw	0x20
	retlw	0x20
	retlw	0x20
	retlw	0x46 ;F
	retlw	0x49 ;I
	retlw	0x53 ;S
	retlw	0x48 ;H
	retlw	0x20 ;Space
	retlw	0x46 ;F
	retlw	0x45 ;E
	retlw	0x45 ;E
	retlw	0x44 ;D
	retlw	0x45 ;E
	retlw	0x52 ;R
	retlw	0x21 ;!
	retlw	0x21 ;!
	retlw	0x20 ;Space

udelay		; delay W * 100 usec
		movwf dcnt0

udelay0		movlw 8 * mhz
		movwf dcnt1

udelay1		decfsz dcnt1, F
		goto udelay1

		decfsz dcnt0, F
		goto udelay0

		return
bnkcol
		bsf STATUS,RP0
		movlw b'11110000'
		movwf TRISB
		bcf STATUS,RP0
		RETURN
bnkrow
		bsf STATUS,RP0
		movlw b'00001111'
		movwf TRISB
		bcf STATUS,RP0
		RETURN

lcd_bank
		bsf	STATUS,RP0  ;switch to bank 1
		movlw	0x04	; PORTA output RA0 to RA4 
		movwf	TRISA
		movlw	0x00
		movwf	TRISB
		bcf		STATUS,RP0  ;switch back to bank 0
		return
KEYPAD
		movlw 0xc6
		call lcd_cmd
		;clrf PORTB
		;call bnk
		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf hour_hi

		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf hour_lo

		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf min_hi
		
		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf min_lo

		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf sec_hi
		
		call input
		movlw '#'
		subwf temp,0
		btfsc STATUS,2
		return
		movf temp,w
		movwf sec_lo
		return
				

input:
		call curhom
		clrf PORTB
		nop
		call bnkcol
		btfss PORTB,4
		goto rw1
		btfss PORTB,5
		goto rw2
		btfss PORTB,6
		goto rw3
		btfss PORTB,7
		goto rw4
		goto input

rw1
		nop 
		call bnkrow
		btfss PORTB,1
		goto d1
		btfss PORTB,2
		goto d2
		btfss PORTB,3
		goto d3
rw2
		nop 
		call bnkrow
		btfss PORTB,1
		goto d4
		btfss PORTB,2
		goto d5
		btfss PORTB,3
		goto d6
rw3
		nop 
		call bnkrow
		btfss PORTB,1
		goto d7
		btfss PORTB,2
		goto d8
		btfss PORTB,3
		goto d9
rw4
		nop 
		call bnkrow
		btfss PORTB,1
		goto dx
		btfss PORTB,2
		goto d0
		btfss PORTB,3
		goto d#
			
d1
		call lcd_bank
		;call lcd_init
		movlw 0x01
		movwf temp
		movlw '1'
		call lcd_data		
		return

d2
		call lcd_bank
		;call lcd_init
		movlw 0x02
		movwf temp
		movlw '2'
		call lcd_data		
		return
d3
		call lcd_bank
		;call lcd_init
		movlw 0x03
		movwf temp
		movlw '3'
		call lcd_data		
		return
d4
		call lcd_bank
		;call lcd_init
		movlw 0x04
		movwf temp
		movlw '4'
		call lcd_data		
		return
d5
		call lcd_bank
		;call lcd_init
		movlw 0x05
		movwf temp
		movlw '5'
		call lcd_data		
		return
d6
		call lcd_bank
		;call lcd_init
		movlw 0x06
		movwf temp
		movlw '6'
		call lcd_data		
		return
d7
		call lcd_bank
		;call lcd_init
		movlw 0x07
		movwf temp
		movlw '7'
		call lcd_data		
		return
d8
		call lcd_bank
		;call lcd_init
		movlw 0x08
		movwf temp
		movlw '8'
		call lcd_data		
		return
d9
		call lcd_bank
		;call lcd_init
		movlw 0x09
		movwf temp
		movlw '9'
		call lcd_data		
		return
dx
		goto input
d0
		call lcd_bank
		;call lcd_init
		movlw 0x00
		movwf temp
		movlw '0'
		call lcd_data		
		return
d#
		;call lcd_bank
		;call lcd_init
		movlw '#'
		movwf temp
		;movlw '1'
		;call lcd_data		
		return

end
 

Hi,

Thats a lot of code to go though, but it builds first time so thats a good start.

However what you do need to do more of is use more ; comment lines so that when you or anyone else looks at your code, its easy to follow, its surprising how quickly you can forget things and end up wondering , why did I do that ??

Some important info still needed to be able to test out your code fully.

What crystal are you using, I assume from your code its 4mhz ?

I assume your lcd routine is actually putting info onto the display? just that you cannot enter any keypad data ?

What would also help is a wiring diagram or description of how you have got the lcd and keypad wired up, including any resistors on the keypad.

Like any design there are always different ways of doing the same thing.

Once I have your hardware layout I can simulate the design and run the code.

In the meantime these two sites will offer you some good general assembly help.

http://www.winpicprog.co.uk/pic_tutorial.htm
**broken link removed**
 

thank you sooo much for your help. anyway this is the circuit diagram..
fishfeeder circuit.png


and the crystal that im using is 4mhz..
thank you.. :)
 

Hi,

Tried simulating your code but nothing would display on the lcd.

Now seeing your diagram I can understand your use of Glatch which was puzzling me.

However there are a few things about your diagram you first need to consider.

The lcd and keypad can operate together but without the need for that additional chip.
Also its much better to operate the lcd in 4 bit data mode rather than the 8 bit you are using.
It does require slightly more complicated lcd code, there are plenty of code examples around like that Winpicprog site, can provide you with a working 4 bit code if needed.

Usually the keypad will require some pull up resistors, again there are examples around.

Also your feeder motor is on the same power line as the micro, generally better not to have a heavy power device on the same +5v regulator.
The power to the relay seems to be via a resistor and cap, they seem wrong ?


While I can see what you are trying to do, and its all achievable, perhaps go back one step and prove each function separately, starting with the lcd, then add in the rtc/timer and display it on the lcd, followed by the keypad and then the output control.

Plenty of help here on the forum.

Just to show what you can achieve here is what started as my simple little fishkeeping temperature project, but kept expanding over a few years..
**broken link removed**


Found some of my old 16F lcd code
 

Attachments

  • LCD16F84A.7z
    19.5 KB · Views: 78
Last edited:

thank you for your help and info.. ill read it.. thank you..
 

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