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back to back avrdude commands fail with dragon on Ubuntu
I ran into an issue today where issuing back to back avrdude commands will fail when using dragon_isp on Ubuntu 10.10 Summary is some applications like the Arduino IDE issue back...
Tuesday, 20 September 2011 - 09:01
char vs unsigned char in for loops (++ on char objects)
Ok so I stumbled across this and it seems like a compiler issue. It is at least something that I was not expecting. What I'm seeing is that when a variable is declared as "char"...
Friday, 16 September 2011 - 01:54
-Wxxx, -w and #pragma GCC diagnostic warnings
Ok, So I've run into some strangeness when using various diagnostic warnings. I'm using avr-gcc version 4.3.4 on linux but I'm seeing the same behavior on the gcc 386 native...
Tuesday, 1 March 2011 - 08:12
What about bringing sbi() and cbi() out of retirement?
sbi() and cbi() seemed to have been retired as the compiler added support for using CBI/SBI instructions from normal C code when constants were used and the ports were in the...
Friday, 25 June 2010 - 06:46
__FILE__ expansion
Is there anyway to get __FILE__ to be expanded when a macro is created vs when the macro is referenced. For example suppose I have #define HNAME __FILE__ In a header file that...
Saturday, 6 March 2010 - 09:11
Returning a value from a complex function-like macro
Ok, so I've always wanted to be able to return a value from a complex multi-line macro but have never figured out how to do it. Ternary is not an option for the kinds of things I'...
Sunday, 28 February 2010 - 01:41
__builtin_constant_p() with const vars vs #defines
I'm writing some complex macros that needs to be able to tell if the argument is a constant declared with a #define. I was using the function: __builtin_constant_p() but that also...
Friday, 18 December 2009 - 03:33
Switching outputs to inputs, LCD signals, & Pullups
My understanding from looking at the datasheets is that the contents of the port register controls the pullup resistors whenever a pin is set to be an input. If a bit was set to...
Monday, 16 November 2009 - 04:11
Continuation of discussion on float vs double with printf.
So I split off this discussion from the other thread as it really wasn't related to the original topic. So I understand how floats are promoted to doubles on variadic functions...
Thursday, 29 October 2009 - 03:45
fontcreator GLCD font format seems really odd.
So I've been playing with various fonts on a ks0108 GLCD. I've seen that font header files created by Fabien Maximilian Thiele's fontcreator are pretty popular/common but the data...
Sunday, 6 September 2009 - 21:55
bootloader and avrdude -y option
Does anybody have the -y option of avrdude working with a bootloader? (writes # of flash updates to EEPROM) It doesn't work work the arduino/adaboot/diecimila bootloaders which is...
Tuesday, 1 September 2009 - 20:49
More information on new Dragon
Since I apparently got a new version of the Dragon, See this thread: https://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=79959 that nobody seems to have yet...
Monday, 15 June 2009 - 16:41

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