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UPDI programmer software for Arduino - compatible with avrdude
As you may recall, I've been working on a UPDI programmer firmware to run on Arduinos (Arduini?), to facilitate the programming of the new xtiny MCUs. These chips are clearly...
Sat. Feb 17, 2018 - 05:46 PM
Russian Mega128 clone
Today, there was someone asking here for a Russian transistor equivalent. So it occurred to me, "hey, there are Chinese AVR clones, so maybe there are Russian clones also?"...
Thu. Jan 11, 2018 - 12:33 PM
Signatures of the xtiny series and AS7 simulator bug
I want my STK2UPDI project to be able to talk to avrdude, so I need to write part definitions (avrdude.conf) for the xtiny series. I realized I'll eventually need the signatures...
Wed. Dec 13, 2017 - 09:43 PM
STK500 to UPDI is working! (was: Enabling XTiny UPDI)
Thanks to the chips Brian sent me, I have now analyzed the process of how to connect to the UPDI interface. This will eventually allow me to write my STK500v2 to UPDI interface,...
Wed. Nov 22, 2017 - 02:03 PM
AS7 code folding bug
I'd like to report that AS7 still has a bug related to the one reported here: http://www.avrfreaks.net/comment...   The bug was fixed for // style comments, but still exists...
Mon. Nov 20, 2017 - 11:41 AM
avr-g++ treats SFRs differently re constexpr in v 5.4 v/s 7.2
[note this started life on tutorial thread about "toolchain flavours"]   Thanks, I've added avr-gcc 7.2 as a "flavour". Naturally, weirdness ensued. Using the old version (...
Sun. Oct 22, 2017 - 08:59 PM
Generating lookup table at compile time using features from C++14
In recent months, I've been improving my C++ skills, after all plain C is really starting to show it's age. So, variadic templates, auto typed variables, lambda expressions and...
Tue. Oct 10, 2017 - 01:18 PM
GCC optimization fail
This simple program shows a poor optimization by GCC:   #include <avr/io.h> int main () { OCR1A = (PIND << 8) | PIND; }gcc 4.8.1 and 5.4.0 give:   int...
Fri. Sep 29, 2017 - 10:13 PM
I managed to crash avr-gcc :P
Just this (as C++ code):   struct {} __attribute__((io (0x20))); internal compiler error: Segmentation fault   I guess it's just too wrong and gcc couldn't take it....
Fri. Aug 18, 2017 - 06:37 PM
Forbiden tech from China has arrived :-)
That's right, I ordered a board with the infamous AVR clones from Logic Green. It's an Ocrobot Alpha with the  LGT8F328P MCU. The board itself is pretty crappy, no crystal,...
Wed. Aug 9, 2017 - 02:55 PM
How can eBay Mega 128a be so cheap?
The "respectable suppliers" price the atmega 128a at about $4 per chip. However, on ebay you can find them at $1 or less. How is this possible?   I thought: surely they are...
Thu. May 25, 2017 - 06:03 PM
What does system_init() do?
After reading some of the colossal D10 datasheet, I managed to make a blink program for the SAMD10 Xplained Mini board: #include "sam.h" #define LED_PIN 1<<9 int main(void...
Sat. Apr 22, 2017 - 12:48 PM

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