[Tinyos-help] ADC&MDA300

[Christopher Leung]

You have to add a pull-up network to both I2C lines Data and Clk. On the MDA300 board, just put a 10kOhm resistor between the Data and Vcc pins, and another one between Clk and Vcc.

Chris

 

________________________________

From: Antonio Prados Vilchez [mailto:Centag71 at acciona.es] 
Sent: June 27, 2008 7:50 AM
To: Christopher Leung; tinyos-help at millennium.berkeley.edu
Subject: RE: [Tinyos-help] ADC&MDA300

 

Thanks for your help Christopher.

I'm following the steps to read from the ADC ADS7828 in the MDA300 board, using the I2C interface. However, event I2CPacket.writeDone never occurs. I thought that it could be because of a mistake in my code, but I did a bit of research about the sensors of the MTS300 sensorboard which use the I2C interface (Microphone and magnetometer). In those components it also happens, the event I2CPacket.writeDone is never signaled. Does anybody know how to solve this problem?

Thanks in advance.


-----Mensaje original-----
De: Christopher Leung [mailto:christopher.leung at mail.mcgill.ca]
Enviado el: lun 23/06/2008 18:30
Para: Antonio Prados Vilchez; tinyos-help at millennium.berkeley.edu
Asunto: RE: [Tinyos-help] ADC&MDA300

You also need to use the interface Resource from the Atm128I2CMasterC component.
Here are the steps you will need to do: Resource.request, wait for Resource.granted, I2C.write, wait for I2C.writeDone, I2C.read, wait for I2C.readDone, Resource.release.  It's important that you release the I2C resource especially if you have other components relying on it.
Chris

________________________________

From: Antonio Prados Vilchez [mailto:Centag71 at acciona.es]
Sent: Mon 6/23/2008 5:16 AM
To: Christopher Leung; tinyos-help at millennium.berkeley.edu
Subject: RE: [Tinyos-help] ADC&MDA300



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




 

 

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