[Shimmer-users] Add in the internal temperature

[jackey gong]

Dear all,

I am trying to add the value from the internal temperature sensor of MSP430
in Shimmer2R. So, I change some values in the BTstream firmware, in the
shimmerAnalogSetupP.nc, I change the value of

command void shimmerAnalogSetup.addGyroInputs() {
// uint8_t new_chans[] = { 1, 6, 2 }; // x, y, z
uint8_t new_chans[] = { 1, 10, 2 }; // x, internal temp, z
addNewChannels(new_chans, 5);

initADC12MEMCTLx();

TOSH_MAKE_ADC_1_INPUT();
TOSH_SEL_ADC_1_MODFUNC();

// TOSH_MAKE_ADC_6_INPUT();
// TOSH_SEL_ADC_6_MODFUNC();

TOSH_MAKE_ADC_2_INPUT();
TOSH_SEL_ADC_2_MODFUNC();
}

Since the temperature sensor do not need configure any channel of the ADC,
so I delete the PORT configuration for ADC.

But I did not get the right temperature value, it seems like some noise
from other channels. Especially when I rotate the Gyro module, the
temperature value also have some variations on it.

Would you like to help me out?

Thanks,
Jackey

[mike healy]

What you are doing looks OK to me (although sticking it in the middle of
the gyro readings is a funny way to go about it).

Take a look at section 17.2.8 of the MSP430x1xx Family user's guide; it may
be helpful: http://www.ti.com/litv/pdf/slau049f

You may need to change the SHT (sample hold time) settings (in the
initADC12CTL0() function of
$TOSROOT/tos/platforms/shimmer/shimmerAnalogSetupP.nc) as too short a value
here might explain the apparent crosstalk/noise from the gyro channels.

Mike

Post by jackey gong
Dear all,
I am trying to add the value from the internal temperature sensor of
MSP430 in Shimmer2R. So, I change some values in the BTstream firmware, in
the shimmerAnalogSetupP.nc, I change the value of
command void shimmerAnalogSetup.addGyroInputs() {
// uint8_t new_chans[] = { 1, 6, 2 }; // x, y, z
uint8_t new_chans[] = { 1, 10, 2 }; // x, internal temp, z
addNewChannels(new_chans, 5);
initADC12MEMCTLx();
TOSH_MAKE_ADC_1_INPUT();
TOSH_SEL_ADC_1_MODFUNC();
// TOSH_MAKE_ADC_6_INPUT();
// TOSH_SEL_ADC_6_MODFUNC();
TOSH_MAKE_ADC_2_INPUT();
TOSH_SEL_ADC_2_MODFUNC();
}
Since the temperature sensor do not need configure any channel of the ADC,
so I delete the PORT configuration for ADC.
But I did not get the right temperature value, it seems like some noise
from other channels. Especially when I rotate the Gyro module, the
temperature value also have some variations on it.
Would you like to help me out?
Thanks,
Jackey
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