MicroPython Forum (Archive)

dhylands

Your memory error could be occuring if an int overflows from a small int. The + 1 will then try to allocate a multi-precision int.

dhylands

There is a systick interrupt that fires once per millisecond. And USB would have some interrupts (the rate depends on the host). I guess at some point, I should profile the interrupt handler and figure out what kinds of rates we should expect. I know I can do 100,000 interrupts per second on a 16-MH...

dhylands

I imagine that the timing constraint comes from the device in question, and probably not the I2C library itself, but that's really just speculation on my part.

dhylands

It looks like you can use the ETR signal of a timer to be a clock source. Page 521-523 of RM0090 http://www.st.com/web/en/resource/technical/document/reference_manual/DM00031020.pdf gives an overview of the 2 external triggering modes. Page 552-554 describes the TIMx_SMCR register which appears to h...

dhylands

The HAL doesn't disable interrupts anywhere. It's quite possible that it needs to. Normally the HW isn't all that sensitive to timing, but occasionally, it will be. So if an interrupt occurs at just the wrong time, it can change the timing of an operation which then triggers your behaviour. Instead ...

dhylands

Sweet. I've been thinking about doing something similar. I was thinking it would be cool to enhance my shell.py to create a remote-shell.py (i.e. you run the shell, and then you can copy files into and out of, and examine the files, but the python code for the shell is actually running on the host. ...

dhylands

I signed up fo one of the early OpenMVCam boards, and it arrived yeterday.

OpenMVCam uses MicroPython internally.

I wrote a small blog post here:
http://blog.davehylands.com/search/label/OpenMVCam

dhylands

if you either do:

Code: Select all

with open("foo.txt", "w") as f:
    f.write("helloworld")

or do:

Code: Select all

f = open("foo.txt, "w"); f.write("hello world"); f.flush()

or do:

Code: Select all

impoprt gc
open("foo.txt", "w").write("hello world")
gc.collect()

the the data will be written before the read.

dhylands

I guess it depends on the exact servos that came with the kit (I didn't opt for the kit since I already have lots of servos). Here is an example of a fairly crude arm that could be built with servos: http://www.instructables.com/id/Easy-and-Simple-Arduino-Robot-Arm/ Notice that they used 2 servos fo...

dhylands

I would imagine that anything that can be done with an arduino can also be done with micropython. The libraries might not exist yet, but that's where the fun is :) So it's really about deciding on what you want to do, and then deciding how to do it. I'm pretty familiar with many of the hobbyist styl...

MicroPython Forum (Archive)

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