Your configuration seems identical to the telosa/b configuration
(S1087-01 light sensor on port A5). There is already a component (have
you tried it?) ->
tinyos-main/tos/platforms/telosa/chips/s10871/HamamatsuS10871TsrC.nc
Jan
On Sun, Nov 27, 2011 at 11:52 PM, zhiyi <zhu...@cs.otago.ac.nz> wrote:
> Sorry for kicking the old dirts. I followed this thread but have not found
> what I needed.
>
> I have the similar problem with ADC: I can't read proper data from light
> sensors or any sensor on the sensor board EM1000.
>
> I have tried Oscilloscope and it works for the InternalTemperature and
> InternalVoltage. What I did was I create a new sensor configuration similar
> to these two templates. My configuration is:
>
> const msp430adc12_channel_config_t config = {
> inch: INPUT_CHANNEL_A5,
> sref: REFERENCE_VREFplus_AVss,
> ref2_5v: REFVOLT_LEVEL_1_5,
> adc12ssel: SHT_SOURCE_ACLK,
> adc12div: SHT_CLOCK_DIV_1,
> sht: SAMPLE_HOLD_4_CYCLES,
> sampcon_ssel: SAMPCON_SOURCE_SMCLK,
> sampcon_id: SAMPCON_CLOCK_DIV_1
> }
>
> A5 is supposed to be the channel for S1087-01 light sensor on EM1000. What I
> read are the values gradually decreased and then within a few seconds stayed
> at a almost constant value (no change even if I changed the light). I tried
> HOLD_64, but there was no difference. I even took off the sensor board,
> there was no difference.
>
> My mote was CM4000, by the way. I placed my sensor configuration under
> tos/chips/msp430/sensors, which I worked fine in terms of compilation.
>
> Could you please shed some light what I could try next?
>
> Many thanks for your help.
>
> Zhiyi
>
>
>> Are there any of the "standard" telosb external sensors
>> (Humidity/Temperature/Light) available on your telosb ? Can you test
>> whether they give you good readings (or test your code with the
>> internal sensors of the msp430).
>>
>> > > 2) open tinyos-2.x/tos/chips/msp430/adc12/Msp430Adc12.h and comment
>> > > out "ADC12_P6PIN_AUTO_CONFIGURE". Now the Ax PINs are not
>> > > automatically configured, so you should (e.g. in Boot.booted()), do
>> > > this:
>> > >
>> > > call Port61.selectModuleFunc();
>> > > call Port61.makeInput();
>> > >
>> > > (in your configuration:
>> > > components HplMsp430GeneralIOC;
>> > > MyDriverC.Port61 -> HplMsp430GeneralIOC.Port61;)
>> >
>> > I'm not sure I understand - should I create a new driver myself? Based
>> > on an existing module?
>> >
>>
>> The pin(s) on the msp430 to which your sensor is attached must be
>> configured to be in input and module (ADC) function mode. This is done
>> automatically if ADC12_P6PIN_AUTO_CONFIGURE is defined (which is the
>> default). But the pins are switched to module function mode just
>> before the conversion and back to IO function mode afterwards. Maybe
>> there is a timing issue, so you could try to disable the default
>> behaviour and try to take care of the pin configuration yourself.
>>
>>
>> Jan
>
>
_______________________________________________
Tinyos-help mailing list
Tinyos-help@millennium.berkeley.edu
https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
