C code. Analog temperature sensor on CC2510.

Andrey Belyy

Other Parts Discussed in Thread: CC2510

Good day, everyone. Here is the function to getting temperature. Can't find anything that tells me what is [adcV - 0x42] means.

INT8 getTemperature(void){
   INT8 volatile adcV;

   halWait(0x01);

   ADC_SINGLE_CONVERSION(0x00|0x20|0x0E);
   ADC_SAMPLE_SINGLE();
   while(!ADC_SAMPLE_READY());

   adcV = ADCL;
   adcV = ADCH;

return conversionValues[adcV - 0x42];

Best regards, thank you for attention,

Andrey Belyy

over 10 years ago

0 M over 10 years ago

TI__Genius 13620 points

Where did you find this code? Seems you're missing the table with the "conversionValues". The "-0x42" is likely an offset that is subtracted from the ADCH sample (8 most significant bits) before being converted to a temperature value.

For more info about the temp sensor on CC2510, refer to "DN102 -- SoC Temperature Sensor" www.ti.com/.../swra101.

0 Andrey Belyy over 10 years ago in reply to M

Prodigy 120 points

Thank you for answer, i had it in mind too, thought that it could be offset, but no sure facts.

I took it from here http://www.ti.com/product/CC2510/toolssoftware in one of the examples.

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C code. Analog temperature sensor on CC2510.