When I original wrote the clock’s firmware, it took about 7 seconds to generate a QR code. Of course, this was without refreshing the display. The display needs to be refreshed at least two dozen times a second, and these interruptions extended the QR generation time to around 40 seconds.
This was far too long to generate a QR code every second, but it could definitely update once a minute which is all that was absolutely necessary for a clock. I’ve never done something so computationally intensive on an AVR before, so I just assumed that 45 seconds was a reasonable amount of time. While it would have been nice to update every second, I was amazed I got it to work at all.
Regardless of the fact that my clock doesn’t meet the guidelines for border thickness, he linked to a library that was supposedly able to generate a QR code in less than a second. This got me thinking that it might be worth trying to optimize my code before resigning to a once a minute update.
With my shipment date just around the corner, I thought it’d be fun to discuss what I discovered.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Maker Business — SiFive is a startup to pay attention to. RISC-5 is here to stay.
Wearables — Swatch it up
Electronics — Shift away from basic arithmetic
Biohacking — Neuralink – A Closer Look at the Tech
Python for Microcontrollers — CircuitPython takes flight! All aboard with datum, Bluefruit CPX, and more! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit
No comments yet.
Sorry, the comment form is closed at this time.