cc2650: Sensor Controller Studio read multible ADCs

Roland Windhager

Part Number: CC2650
Other Parts Discussed in Thread: CC2650

Hi,

I'm using the cc2650 Sensor Tag, Sensor Controller Studio 1.5.0.188 and TI-RTOS 2.21.00.06.

I'm trying to familiarize myself with the Sensor Controller environment.

I can get the ADC Data Logger example to work but only when I use one pin and access it with a constant, when I select accessed by look-up table I get an error.

What seems to be strange is that the code doesn’t change at all. I don’t think that is supposed to be expected behavior.

Shouldn’t it be accessed in a loop with something like:

adcSelectGpioInput(cfg.pAuxioASensorOutput[n]);

It would be great if someone could post the working example code to acquire the data of several ADC Pins and buffer the output in a 2D Array.

over 8 years ago

0 TER over 8 years ago

TI__Guru**** 317180 points

If you press F1 to get the help and search/ find the ADC section you will find a code snippet for ADC sampling multiple pins.

0 Klas Lofstedt over 8 years ago

TI__Intellectual 1945 points

Hi Roland,

It looks like you put your execution code in the initialization code. I would suggest you take a look at the simplelink academy training "sc_02_ranger" where all steps is shown on how to properly measure an ADC signal.

software-dl.ti.com/.../sc_02_ranger.html

Regards,

Klas

0 Roland Windhager over 8 years ago in reply to TER

Prodigy 70 points

Thank you very much for your support.

Using the Sample Code I can not use the Logging function. And I have to weak up the main function for every value I read thus rendering the use of Sensor Controll pointless.

How can I add a additional variable?.

Even if I just use a functioning code and change n to i, I get an error.

It would be great if I could use another local variable so I can implement some thing like this:

// Enable the ADC

adcEnableSync(ADC_REF_FIXED, ADC_SAMPLE_TIME_2P7_US, ADC_TRIGGER_MANUAL);

// Sample the sensor

U16 n = output.head;

for (U16 i = 0 ;i<3;i++){

adcSelectGpioInput(cfg.pAuxioASensorOutput[i]);

adcGenManualTrigger();

adcReadFifo(output.pSamples[n+i]);

}

n=n+2;

utilIncrAndWrap(n, BUFFER_SIZE; output.head); // BUFFER_SIZE has to be multible of 3

// Disable the ADC

adcDisable();

// Schedule the next execution

fwScheduleTask(1);

Or may be someone can think of a way to implement this funktionality with just one variable

0 Roland Windhager over 8 years ago in reply to Roland Windhager

Prodigy 70 points

FYI: I found a working solution:

for (U16 n = 0 ;n<INPUTS;n++){

adcSelectGpioInput(cfg.pAuxioASensorOutput[n]);

adcGenManualTrigger();

n=n+output.head;

adcReadFifo(output.pSamples[n]);

n=n-output.head;

}

utilIncrAndWrap(output.head+2, BUFFER_SIZE; output.head);// BUFFER_SIZE has to be a multible of INPUTS (output.head+2=output.head+INPUTS-1)

// Disable the ADC

adcDisable();

// Schedule the next execution

fwScheduleTask(1);

0 Klas Lofstedt over 8 years ago in reply to Roland Windhager

TI__Intellectual 1945 points

Thanks for sharing the solution Roland.

Regards,

Klas

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cc2650: Sensor Controller Studio read multible ADCs