~~tag>Edge2 ADC~~

====== Edge2 ADC ======

===== Introduction =====

This documentation will introduce the usage of ADC on the Edge2 IO board.

<WRAP important >
For Edge2, in order to use the ADC function, you need to attach the Edge2 IO board.
</WRAP>

===== Hardware Information =====

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  |



===== Get Raw ADC Value =====

```shell
$ cat /sys/bus/iio/devices/iio:device0/in_voltage4_raw                                             
4082                                                 
```

Convert the raw ADC value to Voltage:

''Voltage = (value / 4096) * 1.8V''