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Computing pointers in gnu as
I've spent a couple hours trying to complete an LED-muxing ISR in gnu assembler, and the "hi8/lo8" operators are giving me no end of pain (as usual). The context is: R30 (ZL) has...
Sunday, 10 November 2013 - 00:44
Debugger Disappointments
Hi! In case anyone at Amtel is monitoring, I'd like to offer a few suggestions for improving the behavior of the debug/simulate features integrated into AStudio6. I've just...
Monday, 21 October 2013 - 02:30
Does Atmel permit the educational use of AStudio6?
I intermittently present a class for highschool kids on microcontroller programming, which has involved a simple AVR-based class project. My co-instructor and I would like to...
Wednesday, 2 October 2013 - 20:36
Does DFU bootloader adapt to CPU clock speed?
I'm thinking of migrating from AT90USB82 to an ATxmega32A4U. In order for the AT90USB82's factory-installed DFU bootloader to work, the part has to be given an 8 or 16MHz...
Saturday, 6 April 2013 - 20:52
A technique for pulling selfcontained modules from a library
I've seen this issue discussed several times before, but not with this exact solution, so I'll barge ahead with my own reinterpretation of the wheel... Fairly often, I generate...
Tuesday, 30 October 2012 - 18:49
Macros to enhance debuggability
Over the past year, I've spent a lot of time using a JTAGICE debugging pod to watch the execution of some firmware I've developed for an ATmega324A. Most of the time, I have to...
Friday, 26 October 2012 - 06:49
CPSE instruction
Feel like a Friday question? As gcc is slowly winning me over, I don't do as much with assembly anymore, but this past week I've had to build some fanatically optimized routines,...
Friday, 17 August 2012 - 06:10
Allocating "just enough" buffer size at link time
Hi, all! I'm mildly interested in finding some elegant way to instantiate a statically-defined data buffer exactly big enough to serve the needs of the most demanding of several...
Tuesday, 27 March 2012 - 18:31
What prevents symbolic debugging from working?
Hi, all; sorry for the provocative title. I can't claim that symbolic debugging of gcc-produced code with AStudio is completely nonfunctional, because at least five or ten...
Sunday, 26 February 2012 - 20:35
Code generation problem with -mcall-prologues
Hi, all! I'm a couple months or more into the development of an atmega324-based product, and happened across what I think is a compiler bug of a very subtle and insidious kind....
Wednesday, 31 August 2011 - 21:33
Technique for automatic firmware version number assignment
Like Jedi crafting their own light-sabers, it seems that every software embedder devises their own scheme for stamping version numbers into firmware builds. Mine's just been...
Monday, 20 June 2011 - 02:07
Linker wish list feature: feasable?
I've pretty much accepted that the features of the embedded-system-specific linkers of the 1980s won't ever be restored, but here's something that I wouldn't expect to be all that...
Monday, 23 May 2011 - 23:42

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