2x16 lcd problem

[k3v1nP]

Still the same went as high as 500. Also put in a PAUSE of 900 before first lcd out. I don't think it can be a busted lcd cause i have 4 and they all do the same thing. Unless this model is just junk.

[k3v1nP]

Also I can replace the lcd with 8 led's and make them flash, so pretty sure the rest of my circuit is working ok.

[mister_e]

On your schematic, your pinout seems to be wrong... at least the way you connect your Data lines to your PIC.

[skimask]

Still the same went as high as 500. Also put in a PAUSE of 900 before first lcd out. I don't think it can be a busted lcd cause i have 4 and they all do the same thing. Unless this model is just junk.

DATAUS is a byte value. Go to 500, and you may as well go to 244 (figured this out the hard way awhile back, not mentioned in the book, but good to know).
Try the pause value up to a couple of seconds...some really are that slow...
Also, double, nay, triple check your wiring...Make sure you've got the connector on the 'right way'.
And put a 'heartbeat LED' in there...

CLEAR				;Define LCD registers and control bits
DEFINE OSC  4			;System speed
DEFINE LCD_DREG PORTD 	;data register
DEFINE LCD_BITS 4 		;width of data path
DEFINE LCD_DBIT 0		;data starts on bit 0
DEFINE LCD_RSREG PORTE 	;select register 
DEFINE LCD_RSBIT 0 		;select bit
DEFINE LCD_EREG PORTE 	;enable register
DEFINE LCD_EBIT 1 		;enable bit
DEFINE LCD_RWREG PORTE 	;read/write register
DEFINE LCD_RWBIT 2 		;read/write bit
LOW PORTE.2 			;LCD R/W low (write) We will do no reading
DEFINE LCD_LINES 2 		;lines in display
DEFINE LCD_COMMANDUS 4000 	;delay in micro seconds
DEFINE LCD_DATAUS 200 		;delay in micro seconds				; 
;Set the port directions. We are setting (must set) all of PORTD and all of PORTE as outputs
;even though PORTE has only 3 lines. The other 5 lines will be ignored by the system.
				; 
TRISD = %00000000 		; set all PORTD lines to output
LED VAR PORTD.7
OUTPUT LED
TEMP VAR BYTE
TRISE = %00000000 		; set all PORTE lines to output 
				; Set the Analog to Digital control register
ADCON1=%00000111 		; needed for the 16F877A see note above and below
				; 
PAUSE 2000
LOOP:				; The main loop of the program
TEMP = TEMP + 1
LED = TEMP.0
LCDOUT $FE, 1 			; clear screen
PAUSE 500			; pause 0.25 seconds
LCDOUT "HELLO" 			; print
LCDOUT $FE, $C0 		; goto second line, first position
LCDOUT "WORLD" 		; print
PAUSE 250 			; pause 0.25 seconds
GOTO LOOP 			; repeat
END				; always end all programs with an END statement

EDIT: Oh yeah, that schematic is jacked up...
Example schematic and/or program is in the PBP manual...

[mister_e]

As it is connected right now i would try

DEFINE LCD_DREG PORTD 	;data register
DEFINE LCD_BITS 4 		;width of data path
DEFINE LCD_DBIT 0

AND change the DATAUS as Skimask said.

[k3v1nP]

So i ripped my circuit down and simplified it with a 16f84a and that worked with all my lcd's. Rebuilt it with the 16f877a and it now works as well. I must have had something messed up in the first build. Sometimes I guess it just pays to start from scratch.

Thanks to everyones for there help. One thing for sure I am certainly learning alot.

[skimask]

So i ripped my circuit down and simplified it with a 16f84a and that worked with all my lcd's. Rebuilt it with the 16f877a and it now works as well. I must have had something messed up in the first build. Sometimes I guess it just pays to start from scratch.
Thanks to everyones for there help. One thing for sure I am certainly learning alot.

Good game... Any idea what the real problem was? Miswired? One wire off?
Keep in mind, the PBP manual, while not a 'do-all end-all of manuals', has a lot of good information in it, a lot of it 'in between the lines', and a lot of it applies to this PIC and that PIC since they're all pretty much built on the same architecture. Use it and use it often! It'll save you a lot of time and trouble. Same goes for the PIC datasheets. A load of the problems that show up here could have been avoided by those two items.

[k3v1nP]

Not a hundred % sure but it was probably just a wrong wire or 2. Wiring diagrams are usually pretty much straight forward so I usually just slap them together and they work ... if I get lucky. When they don't work I can look at it a hundred times and it looks absolutely right. Howerver it only takes one mistake to F it all up. So when things don't work I usually make the call that its one or the other (software or hardware)... this time I think I made the wrong choice. When I rebuilt the circuit this last time I was absolutely maticulous and took my time ... and it works.
Thanks again for the help next time I should just post photographs cause probably all I needed was a second pair of eyes to have a look at it. Now that I got my lcd's all working on to the next challenge. ( I totally understand mister_e's avatar now).