Search found 73 matches
- Sun Oct 31, 2021 10:31 am
- Forum: Other Boards
- Topic: Teensy 4.0 & 4.1
- Replies: 290
- Views: 464711
Re: Teensy 4.0 & 4.1
Yep, i tried arduino monitor, kermit, minicom, screen, ampy, mpremote, rshell @115200 baud ... they all hang. ctrl-d had no effect. no characters are echo'd, and even exiting terminal emulators required unplugging USB ! update: REPL woks on ubuntu 20.04 on another USB port. Got 18.04 workstation to ...
- Sat Oct 30, 2021 10:55 pm
- Forum: Other Boards
- Topic: Teensy 4.0 & 4.1
- Replies: 290
- Views: 464711
Re: Teensy 4.0 & 4.1
Somewhere in the testing i tried sudo and that didn't help, and udev rules are current. As noted uploading circuitpython .hex works fine with teensy cli, and REPL works here's what dmesg and lsusb say [261972.909658] usb 1-3.4: new high-speed USB device number 108 using xhci_hcd [261973.010811] usb ...
- Sat Oct 30, 2021 7:09 pm
- Forum: Other Boards
- Topic: Teensy 4.0 & 4.1
- Replies: 290
- Views: 464711
Re: Teensy 4.0 & 4.1
I had same results with daily build. Here are some more data points: no REPL response on two ubuntu 18.04 and one 20.04 box, but REPL does work (ldev/ttyACM0 115200) on older 16.04 system, but on that system i can't get mpremote, so still can't upload .py files ... REPL works if i plug the teensy4 i...
- Sat Oct 30, 2021 3:41 pm
- Forum: Other Boards
- Topic: Teensy 4.0 & 4.1
- Replies: 290
- Views: 464711
Re: Teensy 4.0 & 4.1
back in Feb 2020 i got an early micropython running on Teensy 4.0 using https://github.com/jimmo/micropython.git. I only had a simple REPL interface over /dev/ttyACM0 (ubuntu linux). I just built the latest micropython for TEENSY40 from https://github.com/micropython/micropython.git, but I can't see...
- Tue Oct 20, 2020 6:11 pm
- Forum: General Discussion and Questions
- Topic: Benchmark comparison of MicroPython boards
- Replies: 18
- Views: 28826
Re: Benchmark comparison of MicroPython boards
Micropython/circuitpython benchmarks on teensy 4 and others
https://forum.pjrc.com/threads/59040-Ci ... post226210
https://forum.pjrc.com/threads/59040-Ci ... post226210
- Mon Feb 03, 2020 11:41 pm
- Forum: Other Boards
- Topic: Teensy 4.0 & 4.1
- Replies: 290
- Views: 464711
Re: Teensy 4.0
OK, i built and uploaded the micropython to my Teensy4 and got a /dev/ttyACM0 REPL. But no "pop up" USB drive ... is there a way import .py files ? rebuild with the .py files in some special folder or ? I've got some comparative numbers of micropython and circuitpython on a few different MCUs, see h...
- Sat Apr 23, 2016 12:40 am
- Forum: MicroPython pyboard
- Topic: CRC hardware on pyboard
- Replies: 9
- Views: 9714
Re: CRC hardware on pyboard
Update. Working in C++ on mbed F446RE ( STM32F446xx cortex-m4 @180mhz, hardware float) with the same simple minded CRC hardware as pyboard, I figured out how to do CRC on 32-bit words so that test vector results were good. You have to reverse the bits of the input words, and the final output CRC ha...
- Sat Dec 26, 2015 12:49 pm
- Forum: WiPy and CC3200 boards
- Topic: SPI clock frequency ?
- Replies: 16
- Views: 20259
Re: SPI clock frequency ?
Ok, I don't have timing issues for now, so I might try to compile it with DMA one day just to see :) I'll take a look on the HAL, tahnks I did some SPI DMA experiments on CC3200 (launchpad, wipy's are hard to come by in the US). With the SPI clock at 20MHz, the 32-bit SPI DMA runs at 17.2 mbs (1000...
- Mon Nov 02, 2015 6:21 pm
- Forum: MicroPython pyboard
- Topic: 1-wire library and pyb.freq()
- Replies: 16
- Views: 14911
Re: RE: Re: 1-wire library and pyb.freq()
We have developed a new 1-wire driver that works with the latest version of the pyboard firmware as well as the WiPy. The slimmed-down onewire.py looks good. For visual comparison, here is logic analyzer with new onewire onewire1.png The low pulse-width at 168mhz is 5.875us. At 84mhz, the low pulse...
- Mon Nov 02, 2015 12:28 am
- Forum: MicroPython pyboard
- Topic: Read ADC using DMA
- Replies: 20
- Views: 26401
Re: Read ADC using DMA
ADC with DMA hack OK, I finally got around to hacking adc.c to use DMA to read the ADC. As above we'll do 10,000 samples. >>> import pyb >>> import array >>> adc = pyb.ADC('X1') >>> buf = array.array('H', bytearray(20000)) >>> t1=pyb.micros(); n=adc.read_timed(buf,2000000); t2=pyb.micros() >>> t2-t...