next topic »

[on:]

Hello,
1/ I have device atmega324p, I downloaded the bootloader from site: https://github.com/magnuskarlsson/SDLogger/wiki/Arduino-howto
2/ I modified a little bit the "Makefile" and "ATmegaBOOT.c" for chip atmega324p, speed 19200, cpu_speed 16MHz
3/ I burned it by avrdragon
4/ I joined RS232-TTL (max232) cabel to PC and to the chip
5/ I made a successful test:

Code:

$ avrdude -c avrisp -p m324p -P com1 -b 19200 -F -U flash:r:readout:i

6/ but writing doesn't work

Code:

$ avrdude -c avrisp -p m324p -P com1 -b 19200 -F -U flash:w:main_blinking.hex:i

What is wrong?
Please any advice how to upload atmega324p chip?
Or does someone provide Arduino IDE files for chip atmega324p?

[Reply #1 on:]

You have specified to avrdude to program the chip using ISP (note the avrisp), and yet you are trying to use a bootloader. The two are very different.

Off the top of my head I can't remeber what ATmegaBOOT uses in relation to avrdude. I think that optiboot is 'arduino' (instead of avrisp), or is it 'stk500v1'. Would have to check.

EDIT:
Try this:
avrdude -c arduino -p m324p -P com1 -b 19200 -D -U flash:w:main_blinking.hex:i

[Reply #2 on:]

Thank you. Today I have found the bug. I forgot change line 119 in ATmegaBOOT.c for chip m324p. Now it works both reading & writing.
Bootloader code is here: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&p=1000323#1000323

Code:

$ avrdude -c avrisp -p m324p -P com5 -b 19200 -F -D -U flash:r:readout.hex:i
$ echo 'this one reads the chip'

$ avrdude -c avrisp -p m324p -P com5 -b 19200 -F -D -U flash:w:main.hex:i
$ echo 'this one writes the chip'

$ echo '-c arduino instead of -c avrisp works too'