Scott Miller
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 Posted:
Sat Dec 11, 2004 9:45 am Post subject:
Bell 202 data pump on ARM7TDMI? |
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I'm looking for advice - and hopefully example code - on implementing a 1200
baud Bell 202 AFSK data pump on an ARM7TDMI core. I realize it's not really
a DSP, but I understand it's been done before. I'm new to DSP, and I'm
looking at this as an alternative to using a relatively expensive external
modem IC. For the reduction in cost and board space, and increase in
flexibility, I think it'd be worth implementing in firmware even if it does
eat up a significant chunk of the CPU's time.
I'm using an AT91SAM7S64, but I'd be happy even with a generic ANSI C
reference implementation. As long as it's got plenty of comments, anyway -
like I said, I'm new to this and might need a bit of hand holding if it's
not ready-to-run code.
For what it's worth, transmitting isn't a big concern. I've already done
that on 8-bit micros. I just need something to get the bits back out again.
Thanks,
Scott |
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