Ralph Doncaster

cortexprog's gang programming is referring to the ability to use multiple debug probes. I know pyocd will let you choose between multiple CMSIS-DAP probes based on the USB serial descriptor...

I finally got the time to look into this, and @Bravo13 is correct. I used the wrong constraint "+d", which is for any upper register (r16-r31), but sbiw only works...

p.s. the latest constraints are here: https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html There was another doc referenced on avrfreaks that had more inline asm details, but I can't find it...

Hans, have you put any thought into using submodules (or some other technique) to share common code across github repos? Just copying and pasting the text is coming back to...

The explanation makes no sense. boards.txt has a separate entry for the old bootloader: `nano.menu.cpu.atmega328old=ATmega328P (Old Bootloader)` Also, if someone chooses the nano/optiboot, and does a "burn bootloader", the boot...

I mistakenly thought there was a USB connector on the back of the PCB, and the firmware was using V-USB. Since it's not, that makes the USB tuning suggestion pointless....

I can't see anything obvious. I'll have to set up my HV programmer to re-test the code. I had a t13 that had its signature page accidentally erased, and I...

Here's one of the avrfreaks discussions about the signature commands. https://www.avrfreaks.net/comment/165751#comment-165751

I recall testing the AC C0 00 00 command to erase the signature page which is mentioned here: https://www.avrfreaks.net/forum/undocumented-signature-row-contents?name=PNphpBB2&file=viewtopic&t=140556 It's been a while since I was working on this. The...

> > > So, I quickly implemented the ICSP protocol (it's even easier than HVSP), but unfortunately I still can't erase the signature page ;-( That's interesting. I didn't have...