Yahoo Groups archive

AVR-Chat

Index last updated: 2026-04-28 22:41 UTC

Message

Re: [AVR-Chat] Re: user code power up or programming mode power up

2008-07-03 by John Samperi

At 11:11 AM 3/07/2008, you wrote:
>If you're planning to use JTAG for your In System Programming, you'll
>find that those four I/O lines can't be used for anything else.

I use them for leds IF I need them. Your code simply needs to disable
JTAG as it starts. Make sure that the reset pin is wired up to the
JTAG header and then the programmer/debugger can get hold of the chip.

Of course you can't debug those lines with leds and you will need to
turn off the code that disables JTAG during debug.

Regards

John Samperi

********************************************************
Ampertronics Pty. Ltd.
11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA
Tel. (02) 9674-6495       Fax (02) 9674-8745
Email: john@ampertronics.com.au
Website  http://www.ampertronics.com.au
*Electronic Design * Custom Products * Contract Assembly
********************************************************

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.