MicroPython Forum

I tried the latest PYBD-SF2 firmware, MicroPython v1.12-371-gf534b9976 on 2020-04-16; PYBD-SF2W with STM32F722IEK, and I am able to get the CAN bus working (communicating with a PYBv1.0 via CAN transceivers). The two main things I needed to do to get it working were: enable the PYBD 3.3V rail for th...

Is it possible to tell standard vs extended frames from the ID? (eg extended IDs would be larger than 11 bits) The early version of the PYBD firmware was from this pull request on github: https://github.com/micropython/micropython/pull/4669 To build it (or any version) do the following (after instal...

You can obtain the old firmware here: https://micropython.org/resources/firmw ... 1d3ca3.dfu

If that firmware works but the latest doesn't, then it should be possible to track down the bug and fix it.

I posted a possible solution to this in https://github.com/micropython/micropython/pull/5660. This allows the "stem" example to work as originally intended.

There are two things of note that might be related to the issues here: The USB connector on the pyboard-D is the USB-HS port which does not support the built-in ST USB DFU bootloader . To access the low-level ST bootloader you'll need a WBUS-DIP28 which brings the USB-FS port out to the USB connecto...

This difference has been added to the CPython-difference part of the docs (see github for reference).

We're happy to announce the next release of MicroPython, v1.12! Source code and firmware can be downloaded from https://micropython.org/download/ The full change log can be found at https://micropython.org/resources/micropython-ChangeLog.txt A summary of the changes follows. Enjoy! v1.12: PYBD board...

In your code you call both mp_stack_ctrl_init() and mp_stack_set_top(...). Only one of these should be called, usually it's mp_stack_ctrl_init() which sets the stack top automatically. mp_stack_set_top is only used if setting it automatically doesn't work. Otherwise, the stack limit checking is quit...

The PYBD_SF6 uses double precision float, and only provides the double precision math functions (eg sin, cos, not sinf, cosf). I see in your ulab code that you use "float" exclusively as the FP data type (at the C level). Is this a restriction or can it also work with double? I would suggest changin...

This really sounds like a hardware issue with the external QSPI flash, the memory-mapped one. The only thing I can suggest at this stage is to remove the PYBD_SF2 completely from anything connected to it, and power it up over USB and measure the current draw using a USB power meter. It should draw a...