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====== VIM3/3L ADC ======

===== Introduction =====

This documentation will introduce the usage of ADC.


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

The ADC  is a 12-bit successive approximation register (SAR) A/D Converter.

^  Pin  ^ SIGNAL  ^  Voltage  ^  Device Node                                       ^
|  10   | ADC_CH0 |  0~1.8V   |  /sys/bus/iio/devices/iio:device0/in_voltage0_raw  |
|  12   | ADC_CH3 |  0~1.8V   |  /sys/bus/iio/devices/iio:device0/in_voltage3_raw  |

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

<WRAP important >
Replace the variable ''x'' in ''in_voltageX''raw with the corresponding channel value
</WRAP>

```shell
$ cat /sys/bus/iio/devices/iio:device0/in_voltageX_raw
```

The following uses Pin10 as an example.

```shell
$ cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw     // pin10 is connected to 1.8V                                        
4082
$ cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw    // pin10 connects to GND
0
```

Convert the raw ADC value to Voltage:

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