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You can also do a USB client on a $1.50 AVR chip: https://www.obdev.at/products/vusb/index.html https://www.obdev.at/products/vusb/index.html Source: Compiled
by rkagerer 7y ago
You can also do a USB client on a $1.50 AVR chip: https://www.obdev.at/products/vusb/index.html https://www.obdev.at/products/vusb/index.html
Source: Compiled and connected a mouse/keyboard firmware running on an ATtiny861a using internal RC oscillator.
- IshKebab 7y agoWhy would you do that though when there are a gazillion Cortex-M chips available that support hardware USB? Fast USB and you don't have to use AVR. Hell, Atmel even sells Cortex-M chips with High Speed USB-2 support (reasonably hard to find; most are only Full Speed).
- deleted 7y ago[deleted]
- HeyLaughingBoy 7y agoTool Familiarity? I've been doing embedded systems large and small for decades but before this year, never put anything with an ARM into production. AVRs are still my go to for most things because I know them well and have all the tooling ready to go.
- 127 7y agoFull ATmega32U4 board is 2.50 and doesn't need any hacks to work.
- rkagerer 7y agoCould you provide a link to that $2.50 price?
- HeyLaughingBoy 7y agoAliexpress. Amazon. eBay.
- rkagerer 7y agoHmm, quick Amazon search I'm seeing $5-6, more if you're outside USA. https://www.amazon.com/s?k=ATmega32U4 https://www.amazon.com/s?k=ATmega32U4
- HeyLaughingBoy 7y agoIt varies and you can't always find the same price. The last price I paid for Nanos on Amazon was 5 for $17. Aliexpress is cheaper than that (that's where they're usually under $3), but I can't always wait that long. My bad: forgot we were talking 32U4. Here's a link for $2.70: https://www.aliexpress.com/item/32846843498.html?src=google&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=1582410664&albag=59754279756&trgt=743612850714&crea=en32846843498&netw=u&device=c&gclid=EAIaIQobChMI6N7YrMzQ5QIVjh6tBh25dQIwEAQYAyABEgKXhfD_BwE&gclsrc=aw.ds https://www.aliexpress.com/item/32846843498.html?src=google&...
- rkagerer 7y agoThanks!