> If you would send me your code for the initialization, I'll look it
> over and see if I find anything wrong.

Jim

Below is where I left it. Initially it was the same as the example in
the ST7036 datasheet (yes, that's the one Alan). Since then it's
been hacked around - different values, delays, Reset and CSB
under/not under PIC control etc etc etc

Not a flicker, so at this stage I've no idea how close or far away
it is from working. Which is the frustrating bit. I wouldn't expect
you to, but if you Google for DOGM PIC code you won't find
two examples the same. That is generally not the case for 44780
and compatibles, which don't have features like selectable Vdd,
bias, op-amp follower gain and so on. I get the feeling that some
have got "Hello World" and are happy enough with that

I'll be e-mailing EA to get the skinny and see if they have code
examples not posted in the Download section of their site or any
"Oh, you have to do this too" advice. As we know from our
experiences with Microchip, the coupling of hardware and
documentation isn't always as good as it should be

COG displays are fragile but the LCD was very well packaged
and shows no sign of damage (unlike the one which someone on
a forum put into a breadboard and wrecked getting out, poor guy).
Mine is on a mounting PCB so it's fairly robust to work with

I'll contact EA and then have a day away from it to get on with
other things

Joe

Using it with an 18F2520 @ 40MHz. ms01 is 1ms delay, us100
is 100us, usec is 1us. No problem with a typical 16 x 2 (using
typical initialisation)

;=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
;        Initialise LCD screen (16x2, 8-bit, 5V)
;=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

lcd_init movlw  0x38             ;function set 1
         call   wr_c_del
         movlw  0x38             ;function set 2
         call   wr_c_del
         movlw  0x1c             ;bias
         call   wr_busy
         movlw  0x58             ;power/icon/contrast
         call   wr_busy
         movlw  0x60             ;follower
         call   wr_busy
         movlw  0x7f             ;contrast
         call   wr_busy
         movlw  0x0f             ;display on
         call   wr_busy
         movlw  0x01             ;clear
         call   wr_busy
         call   ms01
         call   ms01
         movlw  0x06             ;mode
         call   wr_busy
         return

wr_c_del call   write_c
         call   ms01
         return

wr_busy  call   ms01
         bra    wr_c_del

         movwf  temp0
         mov    b'10000000',trisb
         usec
         bcf    rs
         usec
         bsf    rw
         usec
         bsf    en
         usec
chk_busy movlw  b'10000000'
         andwf  portb,w
         skpz
         bra    chk_busy

         mov    b'00000000',trisb
         usec
         bcf    rs
         usec
         bcf    en
         usec
         bcf    rw
         usec
         movf   temp0,w
         call   write_c
         return

write_c  movwf  temp0
         bcf    rs            ;write command
         bra    d_out

write_d  movwf  temp0
         bsf    rs            ;write data

d_out    bsf    en
         call   us100
         movfw  temp0
         movwf  latb
         call   us100
         bcf    en
         call   us100
         return
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.