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integer promotion difference between gnu11 and gnu++11
I read a few of the previous discussions on integer promotion, and none of them mentioned differences between avr-gcc (5.4.0) in gnu11 and gnu++11 modes (the default for avr-gcc...
Sunday, 9 February 2020 - 21:20
avr-gcc inline assembler concrete documentation?
Is anyone aware of a very good, technical description of avr-gcc inline asm?  It took me only a few months to learn straight asm (i.e. write main.S, compile with avr-gcc),...
Wednesday, 29 January 2020 - 17:24
logic diagram for HV programming mode?
I want to make some improvements to my HVSP fuse resetter, and am trying to figure out the logic of how the modern (with enhanced POR) tinies enter HV programming mode. ...
Saturday, 18 January 2020 - 18:51
picoboot v3 beta release
256 bytes of assembler, Arduino bootloader compatible (avrdude -c arduino), with autobaud (minimum 19,200bps @ 16Mhz).  At 500kbps, it will read 32kB of flash on the m328 in...
Sunday, 12 January 2020 - 01:30
updated USBasp firmware
I'm updating and improving the original USBasp code.  The latest code on Thomas Fischl's site is 2011-05-28, without any updates in 3.5 years.   This code (...
Sunday, 23 November 2014 - 00:07
new scope - Rigol DS1054Z
After more than 30 years since I started tinkering with electronics, I'm buying my first scope - the Rigol DS1054Z.  It's on back-order everywhere I checked, but if all goes...
Thursday, 20 November 2014 - 19:33
Oshpark minimum dimension = .25"
I'm making a small breakout board, and my first version was only 230 mils wide.  I didn't realize that OshPark has a 250 mil minimum dimension, so I had to make it a tiny bit...
Sunday, 2 November 2014 - 17:53
gcc 4.9.2 released today
https://gcc.gnu.org/gcc-4.9/   Good incentive for me to go back and try again to get the gcc build script working!    
Thursday, 30 October 2014 - 20:26
Pro Minis now cheaper than bare Atmega328's from official distributors
Just noticed a seller on AliExpress is selling Pro Minis for $16.41 for 10 (12% off the regular 18.65 price). http://www.aliexpress.com/item/F... Only a year ago I couldn't find...
Thursday, 30 October 2014 - 16:00
Tiny85 best AVR for overclocking?
Besides Brad's work with the t85 as a heavily overclocked gaming platform, I've seen a number of other projects overclocking the t85. Overclocking the t85 is even done in...
Thursday, 16 October 2014 - 17:09
looking for SMD half-pitch pads
I'm using diptrace and am trying to make a breakout board for these modules: I don't know what the pads would be called.  I found half-pitch header holes, but I'm looking...
Wednesday, 15 October 2014 - 23:30
help identifying nRF24l01+ compatible modules
I picked up a bunch of SMD nRF24l01+ modules off AliExpress.  They're definately not using Nordic nRF24l01+ chips, since they respond to the bank switch command (0x50, 0x53...
Wednesday, 15 October 2014 - 19:45