Subject:
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RE: NRLink reading RCX response w/ RobotC
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Wed, 1 Aug 2007 18:24:19 GMT
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Reply-To:
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<dickswan@sbcglobal.%StopSpam%net>
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Viewed:
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21862 times
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There are three steps to reading an I2C message from a sensor.
1. Send a message to the I2C sensor to initiate the read. Look at the
program "NXT HiTechnic Accelerometer" in the RobotC sample programs
folder for an example that you can clone. Generally, as a minimum,
this program sets up the sensor's internal register pointer to
indicate what sensor registers are being read. Most sensors have
multiple registers.
2. Continuously loop checking whether I2C messaging status is "busy".
Based on the non-busy results "no error" or various "errors" you
can proceed to step 3 or abort.
3. Now read the reply message.
Your program skipped step 1. Once you add this it looks like it will
work.
Do a search on the nxtasy forums for keywords "ROBOTC" and "I2C". You
should find a good explanation of ROBOTC's "Test I2C Messaging"
capabilities. This provides a terrific method for testing I2C devices.
I have used this to verify NRLink successful operation with ROBOTC.
-----Original Message-----
From: news-gateway@lugnet.com [mailto:news-gateway@lugnet.com] On
Behalf Of Wes Matchett
Sent: Tuesday, July 31, 2007 2:49 PM
To: lugnet.robotics.nxt@lugnet.com
Subject: NRLink reading RCX response w/ RobotC
I have posted a problem to the RobotC forums and not recieved any
response:
http://www.robotc.net/forums/viewtopic.php?t=230
Does anyone here have any experience with RobotC (how is their
support)?
Has anyone here worked with the NRLink? Have you been able to get a
response
from the RCX?
Thanks,
-Wes
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Message has 1 Reply:
 | | Re: NRLink reading RCX response w/ RobotC
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| (...) Searching for "robotc i2c" returns 3 message in the forums: "Interfacing with Lego Sensors" "Help with US sensor!!" "RobotC I2C Help" Only the third message describes "Test I2C Messaging". It's very specific to the message thread and in it you (...) (18 years ago, 2-Aug-07, to lugnet.robotics.nxt)
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Message is in Reply To:
| | NRLink reading RCX response w/ RobotC
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| I have posted a problem to the RobotC forums and not recieved any response: (URL) anyone here have any experience with RobotC (how is their support)? Has anyone here worked with the NRLink? Have you been able to get a response from the RCX? Thanks, (...) (18 years ago, 31-Jul-07, to lugnet.robotics.nxt)
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