MicroPython Forum

... I like the idea of an exception being raised if the feature doesn't exist on that port. That way code is portable and if u try to use a feature the hardware doesn't have then u get an exception. I think this makes sense too. Peter, do you have an opinion? ... It's a good idea. As is documenting...

I guess the diode protects against a reverse-fitted battery. What a revolting way to do it.

R5 only makes sense if they have shares in a battery manufacturer.

Indeed. It does seem unfortunate that memoryview objects in particular use the heap. I have raised this RFC with a minimal test case. I'll be interested to see the response.

from machine import I2C from pyb import Timer a = bytearray(10) m = memoryview(a) b = bytearray((1,2)) def cb(_): m[3:5] = b t = Timer(1, freq=1, callback=cb) So the problem has nothing to do with I2C but with memoryview slicing. [EDIT] I've answered my own question: m[x:y] creates a new memoryview...

Sorry, I misunderstood. I assumed you'd translated working Python code into C. I think a first step is to ask if anyone has managed to do this in MicroPython. I do wonder whether many people here are in a position to test this.

The alternative is to follow the approach suggested by @jickster.

A slice of a memoryview returns another memoryview . A memoryview instance doesn't have the methods of the object it's based on, so there aren't many things you can do with it. Thus >>> a = b'the quick brown fox' >>> a.find(b'q') 4 >>> m = memoryview(a) >>> m.find(b'q') Traceback (most recent call l...

Am I suffering from brain-fade or is something wrong here? Tests done on a Pyboard using the onboard accelerometer as an I2C data source. This sample works: from machine import I2C from pyb import Timer a = bytearray(2) m = memoryview(a) i = I2C(2) def cb(_): i.readfrom_into(60, m) t = Timer(1, freq...

@heikki.hietala What is the aim in rewriting working Python code in C? Performance is almost certainly limited by the network. So I assume your aim is security. I don't think there is a solution to an attacker with unrestricted access to the hardware. A very limited degree of obfuscation may be achi...

If you issue >>> hex(262147) '0x40003' >>> you will see that bits 0x10000 and 0x20000 are zero. Your RTC took 3ms to start up. If this isn't clear I suggest you look up information on binary and hexadecimal numbers. This forum is for MicroPython specific queries and it's not practicable to offer one...

Why not SPI, it already has bidirectional data path? One extra wiring line can make SPI asynchronous. A number of people have enquired about I2C slave mode and various partial solutions have been produced. These had limitations and I wanted to produce a general solution. Crucially I wanted one whic...