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Help needed with suspected silicon bug on ATMega1280
In one our product based on ATMega1280, on a new batch, the bootloader failed to work. After extensive investigation we concluded that there may be a bug in the rev.B silicon of...
Tuesday, 29 October 2013 - 09:59
ATMega8535 Timer0 CTC - a confession and a quiz
With this relatively simple one-off ATMega8535 project I was overconfident and then spent the rest of the day hunting down Timer0 in CTC mode as a 1ms interrupt source not...
Monday, 24 June 2013 - 07:07
Two minor gcc gotchas
While upgrading to newer gcc version, my colleague had to solve two issues. While these are related to the x86-targeted gcc, they are marginally related to AVRs and I believe this...
Monday, 25 February 2013 - 13:03
What's wrong with "p" constraint in pgm_get_far_ad
SprinterSB in https://www.avrfreaks.net/index.p... wrote: Consulting avr/progmem.h from AVR-LibC tells that it expands to inline assembler that uses constraint "p". Using "p" is...
Friday, 8 June 2012 - 08:43
AVR Toolchain v3.3.2 (and v3.4.0) impressions
This is continuation of https://www.avrfreaks.net/index.p... and subsequent. I downloaded (98MByte) the new "Toolchain" Windows installer from http://www.atmel.com/tools/ATMEL...
Thursday, 26 April 2012 - 21:11
clean in mfile
Is that only me, or does the "clean" target in mfile's template omit cleaning .o and .lst stemming from .cpp and .S by some good purpose? Thanks, JW
Thursday, 16 February 2012 - 12:13
AVRISP, AVRStudio4.18 and ISP frequency
I was playing with AVRStudio4.18 + STK500 plugin, and an AVRISP (v2 firmware in the original AVRISP, NOT AVRISP MkII), when I noticed that it displays incorrectly the ISP...
Saturday, 14 January 2012 - 12:22
My today's C gotcha
I have a menu - several strings, an array of pointers for that strings, and an index to that array. I also have a function returning the movement of an encoder since last call of...
Wednesday, 21 December 2011 - 13:37
Controllers in SD/MMC cards
[NB: this split from a thread in AVR Forum about formatting SD/MMC cards] clawson wrote: SD/MMC have an ARM on board Oh, that's very unlikely. A '51, usually. JW
Monday, 28 November 2011 - 15:42
macros instead of typedefs in <avr/pgmspace.h>
It has been discovered recently by the gcc developers, that application of the __progmem__ attribute to typedefs is broken, and the gcc developers refused to fix it, for whatever...
Tuesday, 27 September 2011 - 10:11
Couldn't avr-libc be an "improper" library?
I mean, couldn't it be distributed in source form, together with some user-friendly way to build it for a given AVR model at the moment it is needed for the first time. Eventually...
Monday, 26 September 2011 - 19:26
Atmel AVR 8-bit Toolchain 3.3.0
There is a new Atmel AVR 8-bit Toolchain 3.3.0 (Atmel's "replacement" for WinAVR). http://www.atmel.com/dyn/resourc... The changelog doesn't say too much, basically just new...
Monday, 12 September 2011 - 08:48