bigpilot

This project was posted on the PJRC website long ago, but never a followup to the forum. Here's the link. https://www.pjrc.com/lcd-alarm-clock/

Directly on easyEDA website.

What CAE software are you using?

The previous versions were also "Made in USA", right? But made by yourselves in your own workshop.

We are excited to announce the expansion of our partnership with SparkFun Electronics to include the manufacturing of all Teensy products. Teensy 4.0, Teensy 4.1 and related accessories will now be manufactured by SparkFun in Colorado, USA...

Thanks for the tip. The <avr/interrupt/h> is no longer necessary.

Why is there a header file named <avr/interrupt/h> if the design is based on Teensy 4 (ARM)? Is this a remnant of the porting to ARM?

Speak of the devil: Espressif has just released a RISC-V ESP32 version with MMU support! I haven't seen any pricing yet but hopefully it will force ARM to lower theirs. WCH also told me they would look into my suggestion to add a MMU to their...

post a vid?

After more than 12 years I've finally gotten around to rewriting the software to work on the basis of interrupts. The display update seems much smoother and the key response is snappier. I am, however, somewhat disappointed that the power...

The number of pages would be limited, of course, but you'd gain memory and process protection. An MCU would only have limited number of processes and the small OS running. It's certainly not meant for running Linux or Windows. Think of it as a...

BTW I sent an email to a company named WCH in China which makes RISC-V microcontrolers and suggested they add a MMU to their product. Their lowest offerings cost $0.20 (2K RAM and 16KB Flash) and their most expensive ones $2 (with 64K RAM and...

I'm not talking about Linux per se. There are many other smaller and simpler operating systems out there which would greatly benefit from paging and memory protection. Xous could be a candidate.

I read something about the "Linux Tax" ARM is levying for a MMU. How long before some Chinese company will release a RISC-V MCU with a MMU so we can run some half-decent operating system on a microcontroller?

First "production" version in use. The amplifier is a TPA3116 cheap thingie which sounds quite good.

First working version plus the breadboard prototype it's based on. Still need to finish up some small things (power connector, IR receiver window, rubber feet). The sound quality is exemplary. Those ESS SABRE DACs really shine.

Are all Teensies using Cortex-M cores (without MMU)? Are MMU's out of scope for Teensy?

Almost got the first one working.