From: Bdale Garbee <bdale@gag.com>
Date: Mon, 5 May 2003 06:01:00 +0000 (-0600)
Subject: post
X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=commitdiff_plain;h=a3332a50a2f357fea2cf41a6388b4d23048b0c1f

post
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diff --git a/bdale/blog/posts/Feature_Creep.mdwn b/bdale/blog/posts/Feature_Creep.mdwn
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+Big discussion via email yesterday motivated by Chuck about whether we can add
+a capability to use the Can-Do modules as a bit pipe between a CPU in the
+experiment module and the IHU.  The end result is that yes, we can do it. 
+
+My proposal is that we implement byte-wide in and out busses.  Two of the 
+"spare" outputs and two of the analog input channels get taken over to serve
+as request/acknowledge handshake lines.  The remaining analog inputs and the
+remaining two digital outputs continue to behave as they would in "normal"
+mode.  Data is always sent in blocks of 8 bytes.  The module's stream addresses
+for this capability are the same as for the command/control protocol but with
+the high order bit flipped, so that this bit-pipe function runs at lower
+priority than command and telemetry.
+
+[[!tag tags/amsat]]