just spent a chunk of my morning wrestling with Arduino for the op amp lab, then moved to a bare metal starter project because that wasn't working, and I found myself cursing and wishing someone had just built an easy to use framework for building simple firmware for the SAM L21. then I remembered: I did that. last fall. I even wrote a hecking README. what is happening with my brain? https://github.com/joeycastillo/gossamer/
it came back to me right as I was modifying a linker file to account for the extra space occupied by the bootloader. some deeply-burrowed eight-month-old neuron raised its hand: “didn't we do this already?” then another: “yeah, and we swore we'd never do it again…”
right, yeah, that was easy. I even had the blinky test app configured for the old SAM L21 Feather; all I had to do was update the pin assignments, make and make install. can't believe I came in early to work on this.
ok so today’s tasks involve digital and analog stuff, but first I’d like to have a driver for my OLED. Alas, I can’t use the @adafruit GFX library since it’s meant for Arduino, and my gossamer framework is plain old C. So I think I’m just porting GFX to C this morning, along with their OLED driver, and at least so far this much is promising. Init sequence works and it’s full of stars.
@Blenster haha it was just the random smattering of lines and circles that were showing up as gibberish, but when I fixed my pixel drawing function, they came into focus :)