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how popular is the 0-series?
I've had a couple other embedded developers suggest I check out the 0- and 1-series AVRs.  I don't want to put much effort into learning a new 8-bit AVR if they are not very...
Saturday, 10 October 2020 - 00:50
has anyone analyzed ICSP in detail?
I'm about to setup some tests on the ICSP timing, but figured I'd ask here if anyone has already figured out what the datasheet doesn't really tell you. When trying to enter...
Monday, 14 September 2020 - 16:29
improved USBasp firmware
I've just released v1.06 which includes automatic SCK slowing when the target does not respond. https://github.com/nerdralph/usb...  
Monday, 14 September 2020 - 04:30
flashing AVRs at high speed
It not only works after a million cycles, I think it should actually increase endurance. http://nerdralph.blogspot.com/20...  
Sunday, 6 September 2020 - 17:30
RC oscillator stability
Lately I've been improving the micronucleus USB bootloader.  Although the USB spec allows for +/-1.5% timing variation for low-speed USB, I've found some USB host controller...
Tuesday, 1 September 2020 - 00:46
did I break avr-gcc? plugin needed to handle lto object
This is an advanced question, but I figured I'd try posting here as there are a couple gurus that read avrfreaks with whom I don't communicate directly. I've been writing...
Wednesday, 15 July 2020 - 01:23
ArduinoShrink library v0.1.0
There have been many faster/better replacements for digitalWrite().  What I have not seen is a transparent replacement that works with the stock Arduino core. ...
Thursday, 9 July 2020 - 22:45
WCH MCS-51(8051) USB MCUs
Although these cheap chips have been out for a couple years, I've not seen a lot of English documentation about how to use them.  I recently picked up a couple of modules (...
Thursday, 2 July 2020 - 19:11
picoboot-lib arduino protocol bootloader in 258 (now 320) bytes
I've written a bootloader for tiny AVRs that needs only 258 bytes of flash.  It's written to be used as a library, so adding a single include to your main enables the...
Wednesday, 24 June 2020 - 15:12
A full-duplex software UART for tiny AVRs
I've written it for the ATtiny13, ATtiny85, and ATtiny84 series.  Other AVRs with an 8-bit timer/counter having output compare could be supported with minor modifications to...
Friday, 12 June 2020 - 04:33
how to write foolproof Arduino open-source libraries?
When I first started releasing open-source AVR utilities and libraries, I usually released them with just a basic Makefile for building from the command line.   If you couldn...
Wednesday, 20 May 2020 - 13:19
tiny AVR timer interrupt bug?
After a day of debugging a timer interrupt driven UART I'm writing, I've come to the conclusion that I've found a hardware bug with OCF0A.  According to the datasheet, "OCF0A...
Monday, 18 May 2020 - 15:12

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