Search found 29 matches

by miltmobley
Tue Apr 05, 2016 2:40 am
Forum: MicroPython pyboard
Topic: how to use usb port for user data
Replies: 4
Views: 3861

Re: how to use usb port for user data

Thanks for your help, I will try the options you suggested. My actual goal is to have the pyboard control the sample rate of an attached sensor, possibly filter the data and push it to subscribers. I first thought of using the usb port for testing at least, but the eventual device would be autonomou...
by miltmobley
Mon Apr 04, 2016 8:11 pm
Forum: MicroPython pyboard
Topic: how to use usb port for user data
Replies: 4
Views: 3861

Re: how to use usb port for user data

Would something like this work? import pyb import select sensor = Sensor() # I have to implement this def push_up(usb, sensor): usb.setinterrupt(-1) while True: select.select([usb, sensor], [], []) if usb.any(): sensor.write(usb.read(256)) # pass command to sensor if sensor.any(): usb.write(sensor.r...
by miltmobley
Mon Apr 04, 2016 6:56 pm
Forum: MicroPython pyboard
Topic: how to use usb port for user data
Replies: 4
Views: 3861

how to use usb port for user data

I want to forward sensor data to a pc host, and thought it would be possible to use the usb port to do so. But there are problems: repl apparently owns the usb port, at least if i open /dev/ttyACM0 on the host. If i run one of the leds tutorials that loops with short delays, the repl output is not u...
by miltmobley
Thu Mar 17, 2016 3:56 am
Forum: General Discussion and Questions
Topic: MODBUS implementation
Replies: 7
Views: 6760

Re: MODBUS implementation

All I know about modbus i read on wikipedia. But it appears to be a command and control protocol that can be used over serial links, with some computer being the master and your pyboard being a slave. You would have to implement a monitor program to run on the pyboard that would continuously wait fo...
by miltmobley
Thu Mar 10, 2016 4:50 am
Forum: General Discussion and Questions
Topic: Difference between pyMIte and MicroPython
Replies: 7
Views: 6126

Re: Difference between pyMIte and MicroPython

Hi, ATMEL probably has a low level library comparable to the ST hal used in the stmhal port, I know they do
for SAM3 chips used in e.g. Arduino Due. You may find the code in Atmel Studio IDE, if you can access Windows,
or look for it on the ATMEL web site..
by miltmobley
Thu Mar 10, 2016 4:42 am
Forum: MicroPython pyboard
Topic: cant build stmhal with Linaro toolchain
Replies: 6
Views: 3141

Re: cant build stmhal with Linaro toolchain

Thanks, that fixed the problem, now the build completes.
by miltmobley
Wed Mar 09, 2016 8:13 pm
Forum: MicroPython pyboard
Topic: cant build stmhal with Linaro toolchain
Replies: 6
Views: 3141

Re: cant build stmhal with Linaro toolchain

Hi all, I downloaded the launchpad tool chain. Now all the files seem to compile, but the link fails with a dozen or so messages like: objcomplex.c:(.text.complex_print+0x52): undefined reference to `__isnanf' Also not found were __finitef and sincosf. I couldn't find any references to __isnanf in t...
by miltmobley
Tue Mar 08, 2016 7:08 pm
Forum: MicroPython pyboard
Topic: cant build stmhal with Linaro toolchain
Replies: 6
Views: 3141

Re: cant build stmhal with Linaro toolchain

Thanks for your reply.True, Linaro has a Linux focus, but also provides a bare metal toolchain, the one I used.
I also tried the standard one provided by Linux Mint via Synaptic, which has different problems.
I will try the launchpad one next.
by miltmobley
Tue Mar 08, 2016 12:30 am
Forum: MicroPython pyboard
Topic: cant build stmhal with Linaro toolchain
Replies: 6
Views: 3141

cant build stmhal with Linaro toolchain

Hi, I made a first attempt to build stmhal on a Linux Mint system with a Linaro toolchain, specifically gcc-linaro-4.9-2015.02-3-x86_64_arm-linux-gnueabihf, and got some errors. The definition of HUGE in micropython/lib/libm/fd_libm.h (~line 88) gets a 'redefined' error, since HUGE was previously de...