Malte Steiner · @MalteSteiner
7 followers · 28 posts · Server mastodon.social
Malte Steiner · @MalteSteiner
6 followers · 22 posts · Server mastodon.social

Put my in a temporary case made from a random cardboard box, to further work on its firmware.

#seeedxiao #samd21 #diy #synthesizer

Last updated 2 years ago

HaD marble · @marble
33 followers · 39 posts · Server hackaday.social

I now have bunch of tiny and dev boards.
In the picture you can see (left to right, top to bottom) an Adafruit QT-Py RP2040, a Waveshare RP2040-Zero, a Seeed Studio XIAO SAMD21 and an Adafruit QT-Py SAMD21.
I also plan on obtaining an Seeed Studio XIAO RP2040 for completeness sake.

#samd21 #rp2040

Last updated 2 years ago

HaD marble · @marble
33 followers · 39 posts · Server hackaday.social

The new tool chain is based on Great Scott Gadgets' apollo.
github.com/greatscottgadgets/a

I did initial test with mkj's QT-Py port
github.com/mkj/apollo/tree/qtp

But due to the chip shortage, also weren't available for quite a while.
This gave me a good excuse to get more familiar with TinyUSB and resulted in an port of apollo.
github.com/greatscottgadgets/a

#samd21 #rp2040

Last updated 2 years ago

Les capsules du prof Lutz · @lutzray
197 followers · 2972 posts · Server mamot.fr
Les capsules du prof Lutz · @lutzray
197 followers · 2972 posts · Server mamot.fr

So I devised a set-up to measure the internal 32 kHz crystal (OSC32K) characteristics, ie frequency and clock jitter. First I calibrated the clock of an audio recorder with a GPS time signal to find out it was sampling at EXACTLY 47998.519 Hz. I then recorded for almost an hour EACH one second tic the produced (using the RTCZero library).

#arduino #samd21

Last updated 3 years ago

Les capsules du prof Lutz · @lutzray
197 followers · 2972 posts · Server mamot.fr

Le graphique précédent est trompeur quand à l'évaluation du tressautement de l'horloge (clock jitter): il est basé sur l'horodatage des serial.println() dans l'IDE Arduino alors que le débit de l'interface série était réglée à 9600 bauds 🤦‍♂️ La précision affichée à la milliseconde près est factice...

#samd21

Last updated 3 years ago

Lup Yuen Lee 李立源 · @lupyuen
1241 followers · 14414 posts · Server qoto.org
Les capsules du prof Lutz · @lutzray
197 followers · 2972 posts · Server mamot.fr