flashing an atmega8 chip

protodomemusic / mmml

Micro Music Macro Language - An MML Implementation for 1-Bit Music on AVR Microcontrollers

GNU General Public License v3.0

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flashing an atmega8 chip #2

Closed farvardin closed 4 years ago

farvardin commented 4 years ago

Hello, I've tried to flash one of the demo song on an atmega8(A) chip, but I can't get any sound...

The command line used to flash the hex was:

avrdude -p atmega8 -c USBasp -U flash:w:mmml.hex:i -U lfuse:w:0xe4:m -U hfuse:w:0xd9:m

avrdude: verifying ... avrdude: 1 bytes of hfuse verified

avrdude: safemode: Fuses OK (E:FF, H:D9, L:E4)

avrdude done. Thank you.

I've adapted the fuse according to this website: https://www.engbedded.com/fusecalc/ (using 8mhz internal clock but there are many other options so I'm not sure), I've also connected the audio to PB0 and gnd...

do you have any clue?

protodomemusic commented 4 years ago

Hm, I don't have an atmega8 to test this, but looking at the datasheet it should work with no issues. Let's break this down logically:

The usbasp is communicating with the atmega8, which is good.
The fuses are correct (you don't really need the other options for this to work).
From the terminal output you've given me, avrdude looks like it's only dealt with the fuses, not flashed the program. Try this command instead: avrdude -p atmega8 -c usbasp -U flash:w:mmml.hex:i -F -P usb

If the program uploads successfully and you're still not hearing any sound, it might be a problem with the circuit. Let me know how you get on.

farvardin commented 4 years ago

The flashing was ok. I hadn't sent the full log.

I've tried again. The circuit was correct, but I was powering the atmega8 chip with some pins from an arduino, which was already on an other shield, and I suppose the circuit was then underpowered! It was my fault! In the future, I'll try to document better the whole process of using an atmega8.

farvardin commented 4 years ago

I've put a makefile for using an atmega8, and a few music samples (two of my own, one from your repo, "fly to the moon") there: https://github.com/farvardin/garvuino/tree/master/arduino_sketches/others/mmml (it's not really "arduino sketches", but it fits better there)

I've also made a little tutorial on there: https://github.com/farvardin/garvuino/blob/master/doc/garvuino_manual.md (in the MMML section)

And here is a recording (the sound is a bit low) of my music converted to MMML: https://www.youtube.com/watch?v=FPUAUxfS40E