MicroPython Forum (Archive)

Thanks for your answers. There are obviously some constraints on how viper can be used. This is the actual calculations I were trying to optimize. import math import sys L=220 R=170.0/2 K = (R/2*1.7320508075688772)**2 Rh = R/2 Lsq = L * L def d(x ,y): yplusK = y+K Az = math.sqrt(Lsq - (x)**2 - (y-R)...

Nope, does not work. looking in the code it seems that viper does not support float.

I now realize that my simplified code extract does not show what I want to do. I want to use floats in the calculation. @micropython.viper def foo(v:int): return (v*3.6, v*2.3) Does not work. Neither does @micropython.viper def foo(v:int): a = int(v*3.6) b = int(v*2.3) return (a, b) So it looks like...

Is it possible to return more than one value from a viper optimized method/function? E.g.
gives
ViperTypeError: can't do binary op between 'object' and 'int'

The latest code from master works fine.

Do you get any messages through if you connect the two ports on the board?

I have not used the boards fore some time. But i hope that the tests should have catched any software regression. All CAN code that i have done has been merged into master. One thing that has been troubled me a bit is the fact that I have not been able to try the board and the code with a third part...

Sorry for a late reply. Yes the board works fine. I should mention that I made it only to be able to develop the code and to be used on my desk. For a real application you should probably not use RJ11 connectors and cables.

First, if you want to receive a message on the same bus (CAN controller) as you send the message on you have to set the bus in LOOPBACK mode. Second, don't use 32 bit filters with basic frames. It is not supported. The following initialization code works. can.init(CAN.LOOPBACK,False,2,sjw=1,bs1=15,b...

I just put together a skin for the pyboard with two CAN transceivers. It actually seems to work . If anyone is interested it can be found here https://github.com/PappaPeppar/pybcanskin