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Re: Teensy 4.0

Posted: Tue Apr 21, 2020 11:37 am
by jimmo
There's a PR in progress that adds the beginning of support for machine.Pin

I'm surprised by those results too, my memory is is that ESP32 and Pyboard have similar-ish performance numbers and the simple tests I did with Teensy showed that the perf scaled roughly with CPU speed compared to the Pyboard (so I would expect to see significantly higher performance on the Teensy compared to ESP32).

Would be good to replicate with MP on both devices. I've been meaning to test out the PR described above so might be a good opportunity to do this.

Re: Teensy 4.0

Posted: Tue Jun 02, 2020 2:42 pm
by rcolistete
Teensy 4.1 was released in May 11th 2020 :
Image
Teensy 4.1 Released
US$26.85 at PJRC official store
basically a Teensy 4.0 with Teensy 3.6 format, i. e., more pins, uSD, more possible expansions :
- same MCU NXP i.MX RT1062 from Teensy 4.0, which already was a super-microcontroller;
- 8 MB of internal flash memory flash instead of 2 MB;
- uSD;
- more pins compatible with breadboard, 48 in Teensy 4.1 x 26 in Teensy 4.0;
- pins for Ethernet 10 / 100 Mbits;
- pins fora USB host;
- pads in the back side to solder up to 2 IC's : 8MB PSRAM or 16MB flash. It allows some combinations : 8 MB PSRAM, 16 MB flash, 8 MB PSRAM + 16 MB flash, 8+8=16 MB PSRAM.

There is already CircuitPython support for Teensy 4.1, with some new features implemented , see this post at PJRC forum :
- more internal flash memory (7MB in Teensy 4.1 x 1 MB in Teensy 4.0) visible as file system;
- more exposed pins;
- the microSD can work with the Adafruit_CircuitPython_SD library.