Question about 18F4450

[manwolf]

I am trying out an 18F4450 on the LAB-X1 board.

'****************************************************************
'*  Name    : Hello.BAS                                      *
'*  Author  : Ted Crafton                                       *
'*  Notice  : Copyright (c) 2008 PROGRAM SPECS                  *
'*          : All Rights Reserved                               *
'*  Date    : 6/10/2008                                         *
'*  Version : 1.0                                               *
'*  Notes   :                                                   *
'*          :                                                   *
'****************************************************************
CLEAr
define      LCD_DREG    PORTD
DEFINE      LCD_RSREG   PORTE
DEFINE      LCD_RSBIT   0
DEFINE      LCD_EREG    PORTE
DEFINE      LCD_EBIT    1
DEFINE      LCD_RWREG   PORTE
DEFINE      LCD_RWBIT   2
DEFINE      LCD_BITS    8
DEFINE      LCD_LINES   2
DEFINE      LCD_COMMANDUS   2000
DEFINE      LCD_DATAUS      20

TRISD=%00000000
TRISE=%00000000

ADCON1=%00000111

LOOP:
 LCDOUT $FE,1
 PAUSE 500
 LCDOUT "HELLO"
 pause  500
 LCDOUT $FE,$C0
 LCDOUT "Jan Crafton"
 PAUSE 500
GOTO LOOP
END

If runs I have flashing LEDs, however the LCD only displays a row of blocks. I figure I either have bad fuses or some else real simple can someone point me in the right direction.

[mackrackit]

A row of blocks on the LCD might be the contrast needs adjusted. Pin #3 on the LCD.

More info would help.

[Darrel Taylor]

The 18F4550 has analog functions on PORT's A, B and E.

ADCON1=%00000111

Doesn't turn them all off.
<br>

[manwolf]

Darrel

Provided the right clue, I had overlooked one PORT. Reread the datasheet and discovered the error of my ways.

ADCON1 = %00001111 did the trick.

Thank you kind sir.

[manwolf]

Also overlooked the fact that I ordered the wrong PIC. I wanted a 18F4550 but ordered 18F4450 and then couldn't figure out why no I2C. 4550 has and 4450 does not.

If someone needs a couple of 18F4450 let me know.

[Darrel Taylor]

Don't give them away yet.

Did you know that the PBP I2C commands don't use the Hardware MSSP module?

You can still use I2CREAD and I2CWRITE.
<br>

[ErnieM]

Also overlooked the fact that I ordered the wrong PIC. I wanted a 18F4550 but ordered 18F4450 and then couldn't figure out why no I2C. 4550 has and 4450 does not.

If someone needs a couple of 18F4450 let me know.

Funny you say that, I just completed a project where I made the same mistake in ordering the breadboard parts: got 4450 and thought I had 4550's.

Lead to some funny bugs because I was using a different compiler and there the target mattered (due to the differing ammount of RAM).

Also, both devices host the same MSSP Module, so hardware I2C is the same on both. (I'm sure of this because I wrote code to use it on the 4450 that recompiled & ran flawlessly once I got the correct 4550's.)