Hi Bram,
I use the mega control board for a few projects... to get around this
issue I have
1) setup a bootloader for some projects
2) made a bsd style programmer that hooks into the 10pin connector
3) I currently use the AVRISP MK II and avr studio (on windows, till I
can get the win32 libusb working...)
It would be good I think to have an option to invert the pin operation...
Regards
Neil Davey
Hi,
Recently I bought a atmega8 development board from futurlec/mrt. This
board has it's own, yet another idea how the isp connector and
(parallel) programming cable (labeled AT-ISP V1.1) looks like. There's
also a windows software supplied to program the uC.
All signal lines between the isp connector and atmega8 (reset, sck,
mosi, miso) are inverted with a 74ls04.
Since all IC components are installed in a socket, I was able to
bypass the inverters, by inserting wires in the ic socket of the
74ls04 (creating a pin compatible 'passive non-inverting device' ;-)).
With the following added to /etc/avrdude.conf, I was able to program
the atmega8:
programmer
id = "atisp";
desc = "AT-ISP V1.1 programming cable for AVR-SDK1 from
micro-research.co.th";
type = par;
reset = 6;
sck = 8;
mosi = 7;
miso = 10;
;
My questions are:
- Is anyone using this board successfully with avrdude?
- Would it be possible let avrdude invert the programming signals, so
that a board like this would be directly supported?
The avrdude.conf file might then, for example look like:
programmer
id = "atisp";
desc = "AT-ISP V1.1 programming cable for AVR-SDK1 from
micro-research.co.th";
type = par;
reset = _6;
sck = _8;
mosi = _7;
miso = _10;
;
Using some character (_) to invert a pin.
Thanks,
Bram
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