MicroPython Forum (Archive)

I've just improved the stream reading code so that it uses less RAM. Before, if you did read(2048), then it allocated 2048 bytes of RAM from the heap, read into this buffer, then allocated a new buffer of 2049 bytes (one extra for the null terminator), copied the data across, then freed the first bu...

No, unfortunatelly there is no way to defragment memory. It's designed to be ok (ie not need defragmentation) for small objects like floats, short lists and tuples, etc. But for large (kb) buffers, you are best pre-allocating them. You can see what the current state of the heap is by running: pyb.in...

CC3000 support is now in master, but you need to enable the config setting in mpconfigport.mk. There are firmware builds with network drivers available at micropython.org/download.

Thanks guys for finding and working out the cause of this bug, and Dave for fixing it.

The fix is now in the master branch, and firmware with the fix will be available from micropython.org/download, dates 2014-10-02 onwards.

I agree with Markus that it would make sense to show the SD card to the PC as the mass storage device, even in "safe mode". "Safe mode" would then mean: boot up as normal but don't execute any scripts. "Safe mode" was intended primarily so you can edit boot.py if you put something wrong in, or want ...

As dhylands say, it's timing out because 4 characters were not available. To check for a timeout you can do: try: c = uart.recv(1) except: print('timeout') This will work for getting 1 character, but if you want to get more than 1 you will need to put the above in a loop. We'll work on this problem ...

We have a large number of people interested in getting a pyboard post-KS. We have a web shop which is currently only accessible to those who signed up early on after the Kickstarter. Gradually, we are opening this shop to more and more people so that we can deal with the demand, and it is currently ...

The comments on Pyston announcement seem more negative than positive. People complaining that it's Python 2.7 and not Python 3; people saying that it's too difficult and been tried before; people saying they should use a different (and more easily optimised) laguage.

Okay, I tested using both DACs at the same time, using write_timed, and it works! The limitation is that they must run at the same frequency. For example, doing: from pyb import DAC dac1 = DAC(1) dac2 = DAC(2) buf1 = bytearray(128 + x for x in range(10)) buf2 = bytearray(128 - x for x in range(20)) ...

Thanks for the bug report. I have now fixed the DAC(2) problem (it was linking to the DMA incorrectly). I also fixed the documentation regarding casting to an int to store into the bytearray buffer. Re the dual-modulated-triangle output: it could be that you are doing write_timed and triangle at the...