Post by thread:[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 ) -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

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 removed}

> 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. Thanks, that might be the point that I was missing, I will try it this evening or tomorrow! Did you put up a web page about your programmer? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

> must hold down the SDATA line and the SCLK line HIGH for at That was indeed the missing link. Seems to be working now, apart from swapped bytes and other small details. thanks! Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: http://www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics