If you're really hard-core, you can read this thread, very recent, might be better to
start at the end and go backwards,
http://arduino.cc/forum/index.php/topic,139671.0.html
I'm one of the guys who hasn't had any problems with the 1284P and 0xFF low fuse
setting, but all of my boards have nice guard rings around the crystal pins, and also
a series R in the RX0 lead [but no extra cap].
oric_dan:
If you're really hard-core, you can read this thread, very recent, might be better to
start at the end and go backwards,
http://arduino.cc/forum/index.php/topic,139671.0.htmlI'm one of the guys who hasn't had any problems with the 1284P and 0xFF low fuse
setting, but all of my boards have nice guard rings around the crystal pins, and also
a series R in the RX0 lead [but no extra cap].
Yes, I had found that one and read maybe the most recent 2-3 pages. Interesting simulation that pito did. Very glad to hear your experience with it, thanks! When good design practices work as expected, that's always a positve!
I posted pics of my wirewrap test card in another thread recently, it that has no ground rings, all parts in sockets, bootloaded via Atmel AVR ISK MKii and downloaded with FTDI module - all with no issues.
CrossRoads:
I posted pics of my wirewrap test card in another thread recently, it that has no ground rings, all parts in sockets, bootloaded via Atmel AVR ISK MKii and downloaded with FTDI module - all with no issues.
I thought lefty had already decided that you lead a charmed life, ;-). I've never had
one bit of luck all my life, on my end, had to always do everything right, LOL.
I hadn't seen this before, but just ran across it, "bad fortune will be tailored to the individual",
[quote author=Jack Christensen link=topic=109550.msg1126646#msg1126646 date=1361385779]
oric_dan:
If you're really hard-core, you can read this thread, very recent, might be better to
start at the end and go backwards,
http://arduino.cc/forum/index.php/topic,139671.0.htmlI'm one of the guys who hasn't had any problems with the 1284P and 0xFF low fuse
setting, but all of my boards have nice guard rings around the crystal pins, and also
a series R in the RX0 lead [but no extra cap].
Yes, I had found that one and read maybe the most recent 2-3 pages. Interesting simulation that pito did. Very glad to hear your experience with it, thanks! When good design practices work as expected, that's always a positve![/quote]
Yeah, it's either good design, or luck, or maybe just a chip from a good batch, or something
else again, or all of the above, LOL, but it works for me [and Bob too]. Am building up a 2nd
1284P pcb today, and we'll see if luck still holds.
The other thing to realize is, if you do 1284P and use the Bobuino pinout, we also discovered
a bug in maniacbug's pins_arduino.h file in the Bobuino variants subdirectory. It's described
on that thread too, IIRC.
Really, wirewrap is just a step above breadboarding - I've breadboarded these without issue also.
I really don't understand where the issue is.
Maybe crappy crystals elsewhere?
Even there I just use generic stuff
http://www.dipmicro.com/store/XC7-16000
Part in the picture has no branding, just says 16.000
I think this has the fixed analog pin naming, changed in this line:
// #define analogPinToChannel(p) ( (p) < NUM_ANALOG_INPUTS ? NUM_ANALOG_INPUTS - (p) : -1 )
#define analogPinToChannel(p) ( (p) < NUM_ANALOG_INPUTS ? (NUM_ANALOG_INPUTS-1) - (p) : -1 ) // test to see if A0-A7 are off by 1
pins_arduino.h (6.21 KB)
