Hi,
This components doesnt work well, but if you use msp430, update tinyos
to cvs version and take a look at apps/tests/msp430/Adc12 there is an
example of sampling 2 channels.
I'm working on a new component that use 3 channeks but i have junk data
in the beginning of the sampling so it needs fix.
André Miguel de Almeida Marrão Rodrigues wrote:
Hello
I'm trying to figure our how to use your code in a 3 axis accelorometer.
Could you please send me your CeaSensor component and the test
application
that you used?
Best regards,
André
----- Original Message ----- From: "Nicolas Esteves"
<[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Monday, June 18, 2007 4:37 PM
Subject: Re: [Tinyos-help] Multichannel Adc sampling and DMA
Hi,
I tried to sample 6 channels together but i always have 0xfff, im not
sure of the initialisation of the adc if someone can help me it would
be nice...
here is my component
module CeaSensorP
{
uses
{
interface Msp430Adc12MultiChannel as Adc;
interface Resource;
}
provides
{
interface CeaSensor;
}
}
implementation
{
uint16_t results[6];
async command void CeaSensor.init()
{
call Resource.request();
}
event void Resource.granted()
{
atomic
{
adc12memctl_t memctl[6] = {
/*{ inch: INPUT_CHANNEL_A0, sref:
REFERENCE_VREFplus_AVss, 0 }, */
{ inch: INPUT_CHANNEL_A1, sref:
REFERENCE_VREFplus_AVss, 0 },
{ inch: INPUT_CHANNEL_A2, sref:
REFERENCE_VREFplus_AVss, 0 }, { inch: INPUT_CHANNEL_A3, sref:
REFERENCE_VREFplus_AVss, 0 }, { inch: INPUT_CHANNEL_A6, sref:
REFERENCE_VREFplus_AVss, 0 }, { inch: INPUT_CHANNEL_A7, sref:
REFERENCE_VREFplus_AVss, 1 } };
msp430adc12_channel_config_t config =
{
inch: INPUT_CHANNEL_A0,
sref: REFERENCE_VREFplus_AVss,
ref2_5v: REFVOLT_LEVEL_2_5,
adc12ssel: SHT_SOURCE_ACLK,
adc12div: SHT_CLOCK_DIV_1,
sht: SAMPLE_HOLD_64_CYCLES,
sampcon_ssel: SAMPCON_SOURCE_SMCLK,
sampcon_id: SAMPCON_CLOCK_DIV_1 };
jiffies = 250; signal CeaSensor.initDone( call
Adc.configure(&config, memctl, 5, results, 6, jiffies));
} }
async command error_t CeaSensor.sample()
{
return call Adc.getData();
}
async event void Adc.dataReady( uint16_t *buffer, uint16_t
numSamples )
{
signal CeaSensor.sampleDone(buffer, numSamples);
}
}
the buffer signaled by dataReady is always full of 0xfff....
thanks
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