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Re: Teensy 4.0 & 4.1
Posted: Sat Jun 05, 2021 9:34 am
by RobH
I am missing something.... tried to install mpremote with:
which reports: Requirements already satisfied (2 lines:: for mpremote and pyserial)
but after that 'mpremote' on the commandline gives 'command not found'
It looks like I need to do something additionally, but what?
So for the time being I call the python script explicitly from micropyton/tools/mpremote, which seems to have the same effect. And the mount option is very convenient, thanks for the hint!
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 06, 2021 4:31 am
by pythoncoder
I don't know. I installed with
with no problems. Here is where it installed to:
Code: Select all
[adminpete@capybara]: ~
$ which mpremote
/home/adminpete/.local/bin/mpremote
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 06, 2021 7:58 am
by RobH
Thanks Peter, that did it!
BTW With my first attempt I followed the instructions for installing packages which I found at PyPi.org.
Re: Teensy 4.0 & 4.1
Posted: Tue Jun 15, 2021 4:28 pm
by alphaFred
Great to hear that someone is actually using the mimxrt port.
Thanks to the great work of Roberthh we made good progress in the last couple of weeks. But there are still a lot of things to do
.
Re: Teensy 4.0 & 4.1
Posted: Tue Jun 15, 2021 7:28 pm
by RobH
Yes, I'm very happy with the developments of MP for the Teensy 4.0/4.1!
Just tested a TFT display with ST7789. Addition of the C-module (author russhughes) gave no problems and the display works (slowly, probably due to max baudrate 500000 of SoftSPI).
Re: Teensy 4.0 & 4.1
Posted: Tue Jun 15, 2021 8:13 pm
by Roberthh
I just made a PR for hard SPI.
Edit: SPI device numbers start at 0. So the SPI ports at the Teensy 4.0 is SPI(0), and the second port is SPI(1). I have to add the list of Pin and SPI port numbers for the various boards.
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 20, 2021 8:32 am
by RobH
About 2 weeks ago I mentioned these performance figures with pystone_lowmem:
RobH wrote: ↑Fri Jun 04, 2021 7:02 pm
Code: Select all
ESP32 1231 pystones / second
Teensy40 3782 pystornes / second
That was with firmware 1.15-186. With newer firmware 1.15 versions I found for the Teensy figures around 4350. But with 1.16-2 I see now figures around 2650. What could be the explication for these big differences?
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 20, 2021 8:59 am
by Roberthh
No clue. the difference between latest V1.15.xxx and V1.16.2 is just the version number. I did not see any performance drops on Tennsy 4.0. Make sure that you compile with DEBUG=0.
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 20, 2021 11:46 am
by RobH
I added DEBUG=0 to the make call, but it seems not to make a difference.
I repeated pystone_lowmem.py for TEENSY 4.0 with some older firmware versions I had kept.
1.15-184 4269 pystones/second
1.15-216 4244
1.16 2627
1.16-2 2616
By simply including C-modules for support of ST7789 TFT displays I see another performance degradation of around 15%
For completeness also a simple re-check for the ESP32:
1.15-186 1234
1.16-2 878
So performance degradation is comparable for both types.
I'm not unhappy with the absolute performance, but the differences between firmware versions presumably without significant performance related changes makes me very curious (/ concerned).
Re: Teensy 4.0 & 4.1
Posted: Sun Jun 20, 2021 12:52 pm
by Roberthh
That's interesting and should indeed not happen. Maybe you should raise an issue.