Sorry for the confusion. I would indeed welcome timer-based solution to this. If I can use only one timer (16-bit - because of the speed reasons), how can I easily deliver 4 different frequencies? Lets say they are not related - 1.3, 2.0, 2.7 Hz?

That is not helpful - I don't want to use delays (as mentioned in previous post).

Well indeed, amplitude is defined by the digital outputs of the Atmega. Frequencies, lets say 1, 1.5, 2 and 2.5 Hz.
Ideally without using delays.

Hello,

I would like to generate 4 different square-wave oscillators on separate pins. What would be the best approach? I need to have them as accurate as possible? I am already using one (16bit timer).

Regards,
Jonas

this has happened to me twice with the Leonardo and Arduino 1.03 - once on a Mac Pro running 10.7 and once on a Macbook Pro running 10.8 - in the case of the latter the Leonardo was externally powered.

both times it was during the uploading phase - didn't get a kernel panic message, just a hard reboot all of a sudden

Uff, 'glad' I am not alone. I feel your pain!

Yeah, I know that might be an issue sometimes. But now the arduino wasn't connected to anything, powered from the computer. I guess it must be fault on the motherboard of the computer.

I don't understand. It doesn't happen when verifying. It happens when uploading - during the 'uploading' part of the process.

Only when uploading?
What about verify (upload is not performed)?

No, only when uploading. I don't think this is a software issue.

It is indeed very weird. Sometimes the reset is immediate, last time the video I was watching started stuttering and than the computer restarted.

Nothing is attached.

Hey,

it happend to me few times already and I am really starting to hate it. I have few Arduino Boards (UNO, Duemanilove, Leonardo), and all of them sometimes restart my computer when uploading the program.
I have Macbook Pro 13" mid 2010. No other devices are attached. Anyone has an idea?

Regards

One more question:
I am using LCD display using pins 4, 5, 6, 7, 8 and 9, and I'd also like to use one timer for triggering interrupts. What would be the best way to approach this?

Thank you

Also I've read somewhere that Arduino 1.0 doesn't support software interrupts?

Software interrupts? What are they?

Sorry, I mean internal interrupts controlled by the timer overflow.
I found this information in few blog posts, e.g.
http://protofusion.org/wordpress/2012/01/arduino-leonardo-interrupts/

And what are the RX/TX leds representing now? Communication on Serial or Serial1?

Hey guys,

I am currently working on a piece of code generating MIDI clock signal and I got into some trouble after uploading code to Leonardo. It worked flawlessly on Uno, but no luck with Leonardo. Even the MIDI example from the library doesn't work.

Link to the library:
https://github.com/FortySevenEffects/arduino_midi_library/tree/release/4.0

Could it be related to the new methods of dealing with serial communication? I don't see the TX/RX diodes blinking for example.

Also I've read somewhere that Arduino 1.0 doesn't support software interrupts? Is that true? I am using Timer1 library in my code for purposes of precise clock and this would ruin my project.

Thanks a lot for any help.

Same problem here, even with default blink program from examples. I tried flashing latest uploader, no help.