Hi Wouter,

I succesfully wrote a 18F programmer (that one I sent you).

Your command sequence looks OK, but remember: after the last write command
(1111) you need to send a NOP command with the following characteristics: it
must hold down the SDATA line and the SCLK line HIGH for at least the P9
time.

In your command sequence I didn't found such final sequence ...

Good luck

Ps.: I'm in contact with Bonny Gjizen (IC-PROG) and I sent him my program
too. He could succesfully program the 18F routines and IC-PROG can now
read/write the new 18F2xx and 18F4xx devices.

If you need anything, please e-mail me.

----- Original Message -----
From: "Wouter van Ooijen" <wouter@VOTI.NL>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, August 16, 2002 11:47 AM
Subject: [PIC]: 18f programmer problems


> I have a problem developing an 18f programmer. I can do an erase, read
> and write the eeprom, read the chip's ID, read code, but *not* write
> code. I (try to) use single-pane writing. Can anyone see a problem in
> the sequence below?
>
> Wouter
>
>    -- set single pane
>    target_send_20( 0b_0000, 0x0E, 0x3C )
>    target_send_20( 0b_0000, 0x6E, 0xF8 )
>    target_send_20( 0b_0000, 0x0E, 0x00 )
>    target_send_20( 0b_0000, 0x6E, 0xF7 )
>    target_send_20( 0b_0000, 0x0E, 0x06 )
>    target_send_20( 0b_0000, 0x6E, 0xF6 )
>    target_send_20( 0b_1100, 0x00, 0x00 )
>
>    -- select flash
>    target_send_20( 0b_0000, 0x8E, 0xA6 )
>    target_send_20( 0b_0000, 0x9C, 0xA6 )
>
>    --  set address
>    target_send_20( 0b_0000, 0x0E, 0x00 )
>    target_send_20( 0b_0000, 0x6E, 0xF8 )
>    target_send_20( 0b_0000, 0x0E, 0x00 )
>    target_send_20( 0b_0000, 0x6E, 0xF7 )
>    target_send_20( 0b_0000, 0x0E, 0x00 )
>    target_send_20( 0b_0000, 0x6E, 0xF6 )
>
>    -- load data
>    target_send_20( 0b_1101, 0x11, 0x22 )
>    target_send_20( 0b_1101, 0x33, 0x44 )
>    target_send_20( 0b_1101, 0x55, 0x77 )
>    target_send_20( 0b_1111, 0x66, 0x88 )
>
>    wait_100us( 12 )
>
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>

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