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Hi all,
I was trying to get the reading from the
light sensor using TinyDB. I use PW1 and ADC1 as coded in sensorboard.h file
(included below). I had to change the code for the processor to ATmega128 in
order to get any readings from ADC (I was getting some random values around
200-300). Now the problem is that PW1, as soon as TinyDB starts displaying the
values, from 3V drops to 0V so all I have on the graph is 0 (as it is). Does
anyone has any idea what might be wrong and why the voltage on PW1 drops from 3V
to 0V and stays that way?
Thanks.
Amra
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// $Id: sensorboard.h,v 1.1.14.4 2003/08/26 09:08:16 cssharp Exp $ /* tab:4 * "Copyright (c) 2000-2003 The Regents of the University of California. * All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose, without fee, and without written agreement is * hereby granted, provided that the above copyright notice, the following * two paragraphs and the author appear in all copies of this software. * * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS." * * Copyright (c) 2002-2003 Intel Corporation * All rights reserved. * * This file is distributed under the terms in the attached INTEL-LICENSE * file. If you do not find these files, copies can be found by writing to * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, * 94704. Attention: Intel License Inquiry. */ /* * * Authors: Alec Woo, David Gay, Philip Levis * Date last modified: 6/25/02 * */ /* The basic sensor board */ /** * @author Alec Woo * @author David Gay * @author Philip Levis */
TOSH_ALIAS_OUTPUT_ONLY_PIN(PHOTO_CTL, PW1); TOSH_ALIAS_OUTPUT_ONLY_PIN(TEMP_CTL, PW2);
#if defined (__AVR_ATmega128__) enum { TOSH_ACTUAL_PHOTO_PORT = 1, TOSH_ACTUAL_TEMP_PORT = 2, }; //#if defined (__AVR_ATmega163__) //enum { // TOSH_ACTUAL_PHOTO_PORT = 1, // TOSH_ACTUAL_TEMP_PORT = 2, //}; #elif defined (__AVR_AT90S8535__) enum { TOSH_ACTUAL_PHOTO_PORT = 1, TOSH_ACTUAL_TEMP_PORT = 2 }; /* no way to get voltage in RENE 1 */ #else enum { TOSH_ACTUAL_PHOTO_PORT = 6, TOSH_ACTUAL_TEMP_PORT = 5, }; #endif
/* These are the end-user values */ enum { TOS_ADC_PHOTO_PORT = 1, TOS_ADC_TEMP_PORT = 2, }; |
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