Re: [avrdude-dev] stk500 and firmware 1.14

[Theodore A. Roth]

Hi,

I just got done adding a -dparallel option to uisp, so I thought I'd pass on 
my results here.

>From stk500.c:

    434   buf[1] = p->devicecode;
    435   buf[2] = 0; /* device revision */
    436   buf[3] = 0; /* parallel and serial programming */
    437   buf[4] = 1; /* full parallel interface */
    438   buf[5] = 1; /* polling supported - XXX need this in config file */
    439   buf[6] = 1; /* programming is self-timed - XXX need in config file */

Setting buf[3] to 1 forces the stk500 to use hi-v parallel programming when 
accessing the device. I stuck an old 8515 into the stk500, erased it with 
serial ISP to be sure it still works. Then I wired it up for hi-v par and 
was able to upload a program to it.

This should probably be added to the config file of avrdude for parts which
don't have serial ISP functionality. Look at the attached Devices.h (from
Atmel appnote AVR061 avr061.zip file) and you can see which devices this is
(serMP = FALSE).

Another config item might be whether the device has a Full hi-v parallel 
support or not. Some devices (8-pins ones I think) can't use hi-v 
parallel programming but can use hi-v serial programming. This would be 
buf[4] in avrdude, I believe.

Ted

Devices.h
Description: Text document