Thanks for your help, Christopher.
Now I'm trying to use the I2C interface, as you said, but it doesn´t work. I
get a lot of compiling errors in the I2CPacket and Atm128I2CMasterC files, so I
think it's because of the instantiation. Am I doing it right? Should I upgrade
my TinyOS files to a newer version? The way I instantiate these interfaces and
components is:
-----------
implementation
{
...
components new Atm128I2CMasterC();
...
App.I2CPacket -> Atm128I2CMasterC;
}
-----------
module SensorToRadioC
{
uses
{
...
interface I2CPacket<TI2CBasicAddr>;
}
}
-----------
Thanks in advance
-----Mensaje original-----
De: Christopher Leung [mailto:[EMAIL PROTECTED]
Enviado el: vie 20/06/2008 15:40
Para: Antonio Prados Vilchez; tinyos-help@millennium.berkeley.edu
Asunto: RE: [Tinyos-help] ADC&MDA300
The MDA300 board uses an 8-channel ADC with I2C interface (ADS7828). To
use it, you will need the Atm128I2CMasterC component and it can be found
in tos\chips\atm128\i2c. For information on how to use the ADC, you can
look up its datasheet.
Pins A0 to A6 are connected to channel 0 to 6 on the ADC. The
differential inputs 7, 8, 9, and 10, are more complicated to use because
they are connected to a switch which is connected to channel 7.
As for using Vcc as reference voltage, I do not know which voltage line
feeds the external voltage pin on the ADC.
Chris
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Antonio Prados Vilchez
Sent: June 19, 2008 5:40 PM
To: tinyos-help@millennium.berkeley.edu
Subject: [Tinyos-help] ADC&MDA300
Hi TinyOS users!!
I'm using a MDA300 connected to a MICAz to measure a voltage from a
sensor. I want to read from an ADC channel, so I'm using this command:
call Atm128AdcSingle.getData(ATM128_ADC_SNGL_ADC0, ATM128_ADC_VREF_AVCC,
ATM128_ADC_RIGHT_ADJUST, ATM128_ADC_PRESCALE);
I want to read from channel 0 with Vcc as the reference voltage.
However, I always get the same data from the ADC. I've checked the
sensor and it works properly, it gives variable voltages to the MDA300.
Am I using the right command to read from the ADC?
Thanks in advance
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