MicroPython Forum (Archive)

I wrote a simple module to read and write wav files as arrays whilst I was playing with this feature, I'll try and find it again and post it here.

Damien did indicate that the 32nd bit issue 'was fixable' in relation to a bug I raised which touched on the subject.

But I closed that bug (main subject of it wasn't a bug, but my miscomprehension) and didn't raise a specific one for this issue.

The source code emitinlinethumb.c (or similar, I linked to it in the wiki) is the most useful documentation at the moment, it's easy to work out what instructions are implemented (but for what they do you largely have to look elsewhere). Implemented appears just to be a subset of instructions, inclu...

You can't use all pins concurrently for PWM with my module i.e. if you're testing to determine which you can, some of the pins use the same timer/channel combination as others, so if you've already allocated that combo and try to do so again the second pin that needs to use the combo can't, so it wi...

Thanks! Didn't think what you'd added was likely to have broken it, and was planning to try to use some of the informational stuff you've added to timer to reduce size.

Yllumi, the pwm module I put up on the wiki worked when I last tried it, which was several weeks ago. It's possible that micropython has changed in the interim in ways that preclude it working on more recent builds. In particular dhyland has been working on pyb.timer, I note heading in a direction w...

and conflicts with python, Damien updated it to _and I put the sum of the knowledge I gained playing with the inline assembler up on the wiki, hoping someone else would contribute to the bits I couldn't fathom. There are some bits that are currently a little painful, particularly surrounding interac...

The call to timer with a frequency in my module is just to init it, which I couldn't work out how to do directly. As Dave says the frequency is changed later - the following code is a translation of what Damien does in C when you provide a frequency to init a timer, to calc values for prescaler and ...

You can drive headphones or a piezo speaker directly from the dac's ... but the output is *almost* inaudible, ok for testing, no good for anything finished.

Guys, thanks, will test these approaches when I get back from holiday.