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From: Tony Williams
Subject: Re: using synchronous serial PIC to offload main processor loads
Date: Mon, 04 Nov 2002 07:23:14 +0000 (GMT)
NNTP-Posting-Date: Mon, 4 Nov 2002 08:02:18 +0000 (UTC)
User-Agent: Pluto/1.14i (RISC-OS/3.60)
In article <email@example.com>,
> I have an x86 sbc running an RTOS and have a couple of the I/O lines
> dedicated to sync serial (clk & data) going to a PIC controller which
> generates and interrupt when the clk goes high, records the data bit
> and waits for the next one until the entire frame has arrived. The
> PIC controller I have now drives a group of (4) 7-seg LEDs. I was
> thinking that it might be worth trying to use another PIC controller
> which uses the same clk and another data line to send/receive frames
> with different data for another function in case the processor gets
> too busy and I want to offload some lower priority tasks like reading
> a keypad and switches.
Might be better to send clock+data to all PICs in
parallel and have separate Enable lines to each
PIC to identify which one is being talked-to.
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