Using an adc port on CC2530

If you want to use P0_4 to read ADC, you can try the following code.

uint16 adc_ain4=0; //adc reading from P0_4

HalAdcSetReference(HAL_ADC_REF_125V);
adc_ain4=HalAdcRead(HAL_ADC_CHN_AIN4,HAL_ADC_RESOLUTION_10);

Hi YiKai,

I have done what you suggested, please let me know the accuracy of adc channel is 8-bits or 10-bits, with the resolution selected.

You can refer to register definition ADCCON3 in CC2530 user guide. ADC_RESOLUTION_12 is mapped to 128 decimation rate (9 bits ENOB).

Hello,

to set the adc resolution on the cc2530, should I only set the decimation time or I need something else?

is (0 - AVDD5 the voltage) input for the ADC?

Regards,

Filippo

Hi Filippo,

I don't understand your question. Do you have problem using ADC API in hal_adc.c? Please describe your problem more clearly.

sorry to not be clear.

mine is a foolish question.

is there any set up to be done to select the resolution of the adc?

or it is be done by using the ADC API (HAL_ADC_RESOLUTION_X) where x is the bit resolution?

Hi Flippo,

You only need to set voltage reference by HalAdcSetReference. Then, you can use HalAdcRead.

Thanks!

does Voltage reference is the voltage applied to ADVD 5 pin, that cannot be greater than 3.6, is that right?

Regards,

Filippo

Yes, the reference voltage can't be greater than 3.6V