A simplified version of the saadc example in the nrf5 SDK. In this example the Saadc is set to sample 10 times at 100 ms each, with 14bit as a resolution.
RESULT = [V(P) – V(N) ] x GAIN / REFERENCE x 2^(RESOLUTION - m)
(m=0) if CONFIG.MODE=SE, or (m=1) if CONFIG.MODE=Diff.
Versions starting from v15.3.
- The nRF52-DK (PCA10040).
- The nRF52840-DK (PCA10056).
- The nRF52833-DK (PCA10100).
SEGGER.
-
Clone or download the repository into the
$nRF5_SDK_Location\examples\peripheral\folder. -
You can use a potentiometer to test it. The example is set to use the analog pin AIN1 (P0.03).
The middle pin of the potentiometer should be connected to the analog pin, and the other pins to vdd and gnd.
Note: Do not connect the potentiomter to the 5V pin instead of the VDD pin. the maximum supported voltage on the analog pins is VDD. Connecting it directly to 5V may damage the SOC.
- Open your prefered Terminal emulator.
| Analog Input | GPIO |
|---|---|
| AIN0 | P0.02 |
| AIN1 | P0.03 |
| AIN2 | P0.04 |
| AIN3 | P0.05 |
| AIN4 | P0.28 |
| AIN5 | P0.29 |
| AIN6 | P0.30 |
| AIN7 | P0.31 |