Re: PIC / PICAXE-controlled LED Beat flasher
- From: "linnix" <me@xxxxxxxxxxxxxxxxxx>
- Date: 21 Feb 2007 05:57:13 -0800
On Feb 21, 1:13 am, "Johnno" <cppj...@xxxxxxxxxxx> wrote:
Thanks again, although I need to be able to independently control 30
different LEDs. Either I didn't explain this clearly .. or.. do AVRs
really support 30 seperate outputs? (By bank I simply mean a group of
partiular coloured LEDs, I did not mean for this to cause confusion :P
Cheers
John
Total driving power would be a problem. You can probably drive a few
high power LED directly from each AVR. You can do as we do:
Running an ARM master micro, which can crunch FFT like peanuts
(perhaps 20 to 30 per second). Using Jtag to control slave AVRs.
In this setup: http://linnix.com/boards.jpg
4 I/O pins from the ARM (lower left) jtag control 20 pins of the AVR
(upper right, showing back side only). The plan is to have
additional chains and additional AVR per chain. Namely
ARM -> AVR -> AVR -> AVR
\> AVR -> AVR -> AVR
By the way, the AVRs are unprogrammed, just jtag enabled.
The ARM is programmed with USB Jtag.
.
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