MicroPython Forum (Archive)

pythoncoder wrote: ↑

Thu Oct 26, 2017 7:20 am

bc0.h has

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#define MP_BC_LOAD_CONST_SMALL_INT_MULTI (0x70) // + N(64)

I think this means that immediate values in a 6 bit range are added to the bytecode so that bytecodes 0x70-0xaf are emitted. So bytecode 0x81 has an immediate value of 17 (base 10) encoded.

What is immediate value?

There's no need to duplicate that for each and every port. Just look them up in mpfonfig.h (if that takes a lot of time you are using a crappy text editor and cannot really blame the code for it), where pretty much all of them have one or more documentation. If that is not sufficient paste the macr...

mpconfig.h // Whether generated code can persist independently of the VM/runtime instance // This is enabled automatically when needed by other features #ifndef MICROPY_PERSISTENT_CODE #define MICROPY_PERSISTENT_CODE (MICROPY_PERSISTENT_CODE_LOAD || MICROPY_PERSISTENT_CODE_SAVE || MICROPY_MODULE_FRO...

This is main.py led = pyb.LED(1) This is the frozen main.mpy // frozen bytecode for file main.py, scope main_<module> STATIC const byte bytecode_data_main__lt_module_gt_[30] = { 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, MP_QSTR__lt_module_gt_ & 0xff, MP_QSTR__lt_module_gt_ >> 8, MP_QSTR_main_dot_py ...

Is there documentation for each bytecode like how many arguments it takes, what it does, etc?

Background When you wanna turn a .py into compiled code - .mpy - you use mpy-cross.exe . Then, you can create frozen code from those .mpy using tools/mpy-tool.py ; the output is a c-file with the decompiled .mpy in a C-array of bytes. Issue It would be REALLY nice if on each line of the c-array the...

I'm getting stuck trying to figure out sequence of C-code for when C-code is called for pyb.LED

What's the sequence?

Let's say I have this .py

Someone please add some comments - one line per MACRO - in mpconfigport.h; PLEASE.
It would save an enormous amount of time both individually and cumulatively.

memzip was created specifically for the teensy and existed long before frozen. Once frozen was introduced, the teensy port supported both (but only one at a time). memzip supports uncompressed zip files (i.e. a zipfile containing only uncompressed files) used as a read-only file system. I chose thi...

Here's an example of calling a python function from C: https://github.com/micropython/micropython/blob/master/stmhal/pin.c#L118 If you search for mp_call_function in the stmhal directory you'll see several other examples. The link is dead. Please post another one showing how to call Python from C.