This documentation will introduce the usage of ADC on the Edge2 IO board.
For Edge2, in order to use the ADC function, you need to attach the Edge2 IO board.
The ADC on the Edge2 IO board is a 12-bit successive approximation register (SAR) A/D Converter.
| Pin | Voltage | Device Node |
|---|---|---|
| 9 | 0~1.8V | /sys/bus/iio/devices/iio:device0/in_voltage4_raw |
$ cat /sys/bus/iio/devices/iio:device0/in_voltage4_raw
4082
Convert the raw ADC value to Voltage:
Voltage = (value / 4096) * 1.8V