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--- products:sbc:edge2:applications:gpio:adc [2022/12/06 04:04]
nick
+++ products:sbc:edge2:applications:gpio:adc [2022/12/06 21:03] (current)
hyphop [Hardware Information]
@@ Line 15: / Line 15: @@
 The ADC on the Edge2 IO board is a 12-bit successive approximation register (SAR) A/D Converter.
-^  PIN  ^  Device Node  |   |
+^  Pin  ^  Voltage  ^  Device Node                                       ^
-|  9    |               |   |
+|  9    |  0~1.8V   |  /sys/bus/iio/devices/iio:device0/in_voltage4_raw  |
-===== ADC conversion =====
+===== Get Raw ADC Value =====
-Use the following command to view the device node and read the ADC conversion value.
 ```shell
-$ cd && ls /sys/bus/iio/devices/iio:device0
-buffer           in_voltage2_raw  in_voltage6_raw   of_node        trigger
-dev              in_voltage3_raw  in_voltage7_raw   power          uevent
-in_voltage0_raw  in_voltage4_raw  in_voltage_scale  scan_elements
-in_voltage1_raw  in_voltage5_raw  name              subsystem
 $ cat /sys/bus/iio/devices/iio:device0/in_voltage4_raw
 ```
+Convert the raw ADC value to Voltage:
+''Voltage = (value / 4096) * 1.8V''

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