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Flash string at specific location
I am working with a bootloader that requires "RCM" to be in the code space byte address 0x26. In C, I can do: const char bootstring[] PROGMEM = "RCM"; But how do I specify the...
Thursday, 3 September 2009 - 15:55
Low and high bytes
I am still trying to convert my IAR project (mixed C and assembly) to GCC. People have said RTFM, but I can't find what I need. I want to reference an array in assembly. So I put...
Wednesday, 2 September 2009 - 20:02
Assembly Interupt Service Routine
I will not bore you with the trouble I was having with IAR. It is a lot harder than you would think to convert a complex project to a different compiler, but I decided to bite the...
Wednesday, 2 September 2009 - 18:01
ISP with Mega323
I have heard rumors that the AVRISP is going obsolete. The Atmel website has a AVRISP Mk2, but the mega323 is not on the list of supported devices. Digikey lists an AVRISP and...
Monday, 6 March 2006 - 18:37
Mega 8 fuses changing back to defaults
We are getting ready to put a device with a mega 8 into production. A batch file is used to program the device and set the fuses for the 8 MHz internal RC oscillator. A few of the...
Friday, 24 February 2006 - 14:54
ISP Trap
I found the solution to my problem, but I am anoyed that there is a trap like this. I have a controller that uses the tiny13. I programmed it using ISP. A week later, ISP would...
Monday, 14 November 2005 - 21:37
SOIC tiny13
I almost stepped in a trap. I designed a PCB for a SOIC tiny13. Now I find out that the tiny13 is available in either an EIAJ SOIC or a JEDEC SOIC! Digikey apparently is not aware...
Wednesday, 14 September 2005 - 16:13
Production Programming for Tiny11
I am working on a tiny11 project, but I don't know to do the production programming. For prototypes, I would use a DIP and the STK500. But I don't want to put a SO8 in a socket....
Tuesday, 17 May 2005 - 19:45
Using New AVR with C
I am using the IAR compiler. It has an include (h) file and a linker control (xcl) file for each AVR. But not the mega48 because that was introduced after this compiler version. I...
Wednesday, 13 April 2005 - 17:05
Studio 4.09 firmware upgrade
AVR STudio 4.09 says I need to upgrade to AVRISP version 0x01.0x0F. I click on OK and it goes through the motions, but then says "Error: no programmer found". When I click on the...
Thursday, 3 June 2004 - 17:57
Mega 8 Bootloader
I am having trouble with bootloaders. The following program should reprogram the first 8 pages (512 bytes or 256 words) of flash. The first byte of each word should be the word...
Wednesday, 2 June 2004 - 21:14
Calculations in C
I did not learn C in school. I learned Fortran instead. I know how to program this in Fortran, but I am having trouble with IAR C and the Mega 8. unsigned char A, B, C, D, E; B...
Tuesday, 11 May 2004 - 14:18

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