For Ubuntu 22.04 the simplest solution is to remove the package brltty via sudo apt remove brltty, since its unnecessary unless you’re using a braille e-reader, however unsure if it could cause errors later on. Also for information about brltty visit there site at https://brltty.app/
Be careful. This works at first blush, but it directly writes to a register that the GPIO controller driver believes it owns. It will cause odd and hard to track down side effects, either on this GPIO line or on a GPIO that is in the same bank. For this to work reliably you need … Read more
There are many many reasons you might want to use an RTOS. They are varied & the degree to which they apply to your situation is hard to say. (Note: I tend to think this way: RTOS implies hard real time which implies preemptive kernel…) Rate Monotonic Analysis (RMA) – if you want to use … Read more
Normally, an interrupt service routine proceeds until it is complete without being interrupted itself in most of the systems. However, If we have a larger system, where several devices may interrupt the microprocessor, a priority problem may arise. If you set the interrupt enable flag within the current interrupt as well, then you can allow … Read more
Dual issue means that each clock cycle the processor can move two instructions from one stage of the pipeline to the next stage. Where this happens depends on the processor and the company’s terminology: it can mean that two instructions are moved from a decode queue to a reordering queue (Intel calls this issue) or … Read more
Personally, I’d recommend an ARM Cortex-M3 based microcontroller. The higher-power ARM cores are extremely popular, and these low-power versions could very well take off in a space that is still littered with proprietary 8/16-bit cores. Here is a recent article on the subject: The ARM Cortex-M3 and the convergence of the MCU market. The Arduino … Read more
Today AVR and PIC are probably the most common microcontrollers among hobbyists. Both have a very wide range of device variants and both can be used to achieve similar results. For a beginner I would suggest AVR due to various reasons: AVR family (tiny, mega) is coherent and easy to understand. The architecture is powerful … Read more
You are looking for Multi-Process Mode for gdbserver and set remote exec-file filename
I have some preferences (and pet peeves) from writing software to control media and display devices using RS232. Depending on your hardware, some of these may not apply: I think it’s a good idea to make your protocol more friendly for automation. If you need an interactive interface (command line or other), build it separately … Read more
Uninitialized exception vectors (you know, for the ones that “will never be reached”) Say it with me: Global variables. Especially ones shared between ISRs and tasks (or foreground loops) without protection. Failure to use “volatile” where necessary. Having routines that DisableInterrupts() and then EnableInterrupts() paired up. Got that? Not RestoreInterrupts(), but ENABLE. Yeah, nesting. No … Read more