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AT90USBKEY issues
Trying to run Dean's Mass Storage Host demo on AT90USBKEY. So far unsuccessfully. At first had problems with the MS_Host_ResetMSInterface call. It kept failing with the...
Monday, 19 April 2010 - 19:10
Where to buy an AVRISP programmer?
It is getting more and more difficult to find an AVRISP-compatible programmer. We used to use this one. But it looks that they are no longer made. Any suggestions? Need RS232 (not...
Friday, 12 March 2010 - 14:25
WINAVR ignores volatile
I was playing with cli/sei reordering discussed in other threads and stumbled upon the following case, which I cannot explain. When BUG=1 is defined, WINAVR seems to completely...
Thursday, 4 February 2010 - 15:39
CMD_PROGRAM_FLASH_ISP
Anybody knows what is the purpose of the cmd3 field in the CMD_PROGRAM_FLASH_ISP command in the STK500 and AVRISP mkII communication protocols? The documentation says that it is...
Thursday, 20 August 2009 - 13:09
ATmega324PA signature
I was reading the ATmega324PA datasheet and noticed that the signature is different from that of ATmega324P. I wonder why would Atmel want to change it? I had an impression that...
Monday, 22 June 2009 - 17:54
Is this a bug in the compiler?
#include int main(void) { while (1) { switch (PINB) { case 0: PORTB = 0; break; case 1: PORTC = 1; break; case 2: PORTD = 2; break; case 3: PORTB |= 3;...
Saturday, 9 May 2009 - 19:04
Several push instructions at the top of main()
The compiler generates several push instructions at the beginning of main(). I have seen up to 15. Makes me fill uneasy. Bug? In the following example, it generates 5 pushes....
Wednesday, 15 October 2008 - 03:14
Porting from CV to avr-gcc
For AVR I'm currently using CodeVisionAVR, still v1. My projects are mostly optimized for code size. I tried avr-gcc a few times in the past. CodeVisionAVR always seemed to...
Tuesday, 14 October 2008 - 13:55
Various AVR C compilers use of #include "file.c"
There has been an ongoing discussion in the codevisionavr group on yahoo about a change in behaviour of the CVAVR compiler. The change is related to projects in which one C file...
Wednesday, 25 June 2008 - 16:07
Problem with analog comparator and fast PWM on ATmega88
Hello, I use analog comparator interrupt to detect zero crosses. The input signal is at 60 Hz. Everything appears to work just fine. But when I add Fast PWM to the same...
Tuesday, 21 June 2005 - 20:57

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