Why not log to SRAM (root or xmem) then periodically, in a lower priority task, write the data to serial flash?
Regards,
Nathan
-----Original
Message-----
From: r...@yahoogroups.com
[mailto:r...@yahoogroups.com] On
Behalf Of Chuck Bass
Sent: Monday, 21
November 2005
10:24
AM
To: r...@yahoogroups.com
Subject: [rabbit-semi] High speed
data logger
I'm building a system using a 3300 and we are trying to log as much data as we can before we send it out for processing. I've found the following:
1) Serial flash is too slow (16 msec delay for a write)
2) Using only internal ram gives too few points.
3) Using xmem is better, but I don't seem to be able to access very much (60K) before I get corruption (I haven't figured this out yet...)
4) Streaming to the ethernet is pretty good but I still end up missing data points at the data rates I'm looking for (>2kHz).
Is there a way with DC to get after the extra 512K of RAM? Is serial flash really that slow? 60k/sec... If I timesliced/ucos could I overcome the 16msec delay that I assume is spent waiting for the write to finish.
Any help on this would be appreciated
Chuck
r...@yahoogroups.com
wrote:
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There are 2 messages in this issue.
Topics in this digest:
1. Re: Which modules are people using these days?
From: "nerdx86"
2. How to program serial communication port from/to RCM3000
From: "axn_xp112"
________________________________________________________________________
________________________________________________________________________
Message: 1
Date: Sat, 19 Nov 2005 20:30:08 -0000
From: "nerdx86"
Subject: Re: Which modules are people using these days?
I agree with Scott Henion.
My $0.02:
I think the original 3000 & 3100 are very powerfull and widely used..
Should be around for a long time, and I hope that a Rabbit 4000 is
going put into the same footprint...
The RCM3300 adds a few extras into a almost completely compatible
footprint..
________________________________________________________________________
________________________________________________________________________
Message: 2
Date: Sun, 20 Nov 2005 16:32:45 -0000
From: "axn_xp112"
Subject: How to program serial communication port from/to RCM3000
Hi,
I'm researcher from Malaysia. I'm a a first timer person in using
RCM 2000/3000. Could someone help me on programming data transmit &
receiving via serial communication from or to RCM 2000/3000?
Another thing, could someone help me on getting the source (website,
books etc.) neat/full example on programming and setting RCM 2000/3000
I/O port using the Dynamic C?
Thank you.
Addie ________________________________________________________________________
________________________________________________________________________
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There are 2 messages in this issue.
Topics in this digest:
1. Re: Which modules are people using these days?
From: "nerdx86"
2. How to program serial communication port from/to RCM3000
From: "axn_xp112" ________________________________________________________________________
________________________________________________________________________
Message: 1
Date: Sat, 19 Nov 2005 20:30:08 -0000
From: "nerdx86"
Subject: Re: Which modules are people using these days?
I agree with Scott Henion.
My $0.02:
I think the original 3000 & 3100 are very powerfull and widely used..
Should be around for a long time, and I hope that a Rabbit 4000 is
going put into the same footprint...
The RCM3300 adds a few extras into a almost completely compatible
footprint..
________________________________________________________________________
________________________________________________________________________
Message: 2
Date: Sun, 20 Nov 2005 16:32:45 -0000
From: "axn_xp112"
Subject: How to program serial communication port from/to RCM3000
Hi,
I'm researcher from Malaysia. I'm a a first timer person in using
RCM 2000/3000. Could someone help me on programming data transmit &
receiving via serial communication from or to RCM 2000/3000?
Another thing, could someone help me on getting the source (website,
books etc.) neat/full example on programming and setting RCM 2000/3000
I/O port using the Dynamic C?
Thank you.
Addie________________________________________________________________________
________________________________________________________________________
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/rabbit-semi/
<*> To unsubscribe from this group, send an email to:
r...@yahoogroups.com
<*