ADC Continuous read

RE: ADC Continuous read

Stefan Birnir Sverrisson — Fri, 22 Apr 2016 09:24:41 GMT

The analog pins are fixed to certain pins, see the nRF51822 PS 3.2, section 2.2. AIN2 input is pin P0.01. There are 8 analog (AIN) pins available that you can use for the ADC.

RE: ADC Continuous read

?? — Thu, 21 Apr 2016 02:55:42 GMT

HI Stefan Birnir Sverrisson ，Please help me to solve one question，thank you！

nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_2); The inside of the code NRF_ADC_CONFIG_INPUT_2 -----》》 NRF_ADC_CONFIG_INPUT_2 = ADC_CONFIG_PSEL_AnalogInput2, /**< Input 2. */ Corresponding physical pin is p0.02 chip？Or other foot?Can I change?How is the configuration?

RE: ADC Continuous read

?? — Thu, 21 Apr 2016 01:50:43 GMT

HI Stefan Birnir Sverrisson Thank you very much reply,I am study your method!But I will also meet problems, want to leave your mailbox,I want to give you send mail to communicate!

RE: ADC Continuous read

Stefan Birnir Sverrisson — Wed, 20 Apr 2016 09:47:33 GMT

There are some basic ADC examples available here.

In nRF5 SDK there is an adc example that demonstrates a simple example using the latest adc driver, it should work out of the box.

The nRF51 ADC is not so happy about high impedance on the analog input. Connecting a resistor in series to alter the voltage on the analog input pin will generate both ADC offset and gain error. This is explained on these threads (1) (2)

RE: ADC Continuous read

?? — Wed, 20 Apr 2016 08:35:30 GMT

I've tried NRF_ADC->stop = 1,But very sorry that I don't have to solve the problem!

Although there is no solution, or very thank you!