It's easy to get caught in weird assembler errors. This is made more difficult if you don't have a background debugger and need to use a boot loader / serial monitor to debug your system. Sometimes that's all you have. So here is a suggestion for a C++ and Assembler file pair to check to […]
It was bound to happen. The Seeed Studio RP2350 is not connecting to the Arduino IDE. I'll go out on a limb here and chalk this up to the boot loader having an issue after I tried to get it to spit out serial data or maybe it was because I was trying to get […]
Now, let's blink an LED using the Arduino IDE and the Xiao RP2350. I'm going to use a really handy YouTube video by Xeno Kovah: Arch1005: RISC-V Assembly 13 Writing Assembly 02 GCC Inline Assembly. This opens up the possibility of using "extended" assembler to allow for the passing of values between your C and […]
In engineering education there is an ever-present problem with technology-anchored pedagogy: when do you switch from current technology to the next one? Right now, the cool kid on the block in the RISC-V architecture. Will it be the next ARM or will it be the next PowerPC or MIPS? It's hard to tell. However, a […]
There are a lot of discussions at York University regarding the student status of individuals here at York University. The issue is complex and affects multiple aspects of life at the University. Here, I'm going to tackle one very specific issue: computer user profiles (or IDs). It is very common here at YorkU for an […]
I'm doing some rapid "blinkenlights" prototypes for timer code today on the K32L2 board. The goal is to have two separate timers driving two LEDs using interrupt service routines. None of this code is optimized or ideal... I'm leveraging the NXP SDK and the examples that go with it for one Systick-driven LED and another […]
Here we'll look at using the SysTick Timer to make the LEDs blink. The SysTick is a really basic timer found in ARM Cortex M0+ processors from all manufacturers. The SysTick will run an interrupt service routine that updates a global variable. That variable is used in the main loop to toggle the LEDs on […]
The K32 is another Cortex M0+ processor, similar to the ones that I've used in the past, like the KL25 and the K43. I'm using the K32 because it is supported, out of the box by the TinyUSB framework, which I want to leverage for MIDI music control. Typically, though, before we get started with […]
Here at YorkU we rely on emergency phones when accidents or other bad things happen. They are a key part of our safety infrastructure. And, because of this, they need to be checked to see if they are actually functioning. Unfortunately, we've discovered that for some time now many of these safety phones are broken. […]
As the debate on maximum indoor temperature standard gets underway at Toronto City Hall today, now is a good time to point out to YorkU employees and students that we once had a standard for maximum acceptable temperature but the HSEWB Department got rid of it this year. The bottom line is this: we shouldn't […]