Works fine, except I was a bit surprised that it blinks pin 0 (PB0) when the reset button is pressed. The pins file indicates the LED is on pin 7 (PB7, SCK) so that's where I put the LED on my board. Minor issue, I might recompile the bootloader if it keeps me up nights
That's maybe the results of the pins_arduino file your using then the bootloader? My boburino board the bootloader (optibot) blinks the same pin that the blink sketch uses?
The one that came with maniacbug's core. Which if I'm reading things right, doesn't match the source code, at least as far as which pin the LED is on. Maybe that's the only difference.
Full Swing Oscillator; Start-up time: 16K CK + 65 ms; Crystal Osc.; slowly rising power; [CKSEL=0111 SUT=11]
This seemed to be the best and simplest 'fix' for people having problems with serial data problems on the first uart pins. Problem was sensitive to board layout and there were other hardware fixes that were effective, but simply using the full swing option seems to be the best method and doesn't cost anything and is board agnostic.
I'm not sure it will help, and sorry if this was posted before (I didn't follow any linked threads) but I was doing some searches today and ran across a blog posting that has new core files for the 644P/1284P based on 1.5.6-R2.
FYI, I'm currently using the low-power XO and was unable to reproduce the serial data reset issue, even when running at 16MHz and 3.3V. I tried 115200 and 230400 baud for the serial data. But maybe the DIP is more sensitive to this issue than the TQFP that I'm using, so go with what's safest. Then again Robert I don't believe has seen it on his boards with the DIP either, so I really don't know what to think.
The bad news is WinDiff finds changes in nearly every file. The good news is that the vast majority of the changes appear to be additions to the 1.0.5 standard core which should have no bearing on the '1284 processor or add new features. I found just one "conflict" that should be easy to get past.
Is the goal to use the standard core source files?
I find I don't care much about the bootloader LED blinking, as I bootload and then install Blink right off the bat to show the serial interface is working.
Are there many serial things that run at 1 or 2M? I could see that being handy for Arduino/Aruino comm's vs messing with I2C or SPI.
Would be nice to not have to mess with adding 1284 variant back in every time an IDE is downloaded.