I2C Test; I2C Mapping; Test 3 - Advantech RSB-4760 User Manual

$ echo 1 > gpio1/value
$ cat gpio2/value
The values of GPIO 1 & 2 should be the same.

3.1.5. I2C Test

3.1.5.1. I2C Mapping

I2C1
I2C2
I2C3
I2C4
3.1.4.2 Test
List all I2C buses
$ i2cdetect -l
i2c-0 i2c
adapter
i2c-2 i2c
adapter
i2c-3 i2c
adapter
Note: I2C2 (i2c‐1) now is not available.
Check ADV7535 status.
$ i2cdetect -r -y 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
10: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
20: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
30: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ 38 UU ‐‐ ‐‐ UU ‐‐ ‐‐ UU
40: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
50: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
60: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
70: ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐ ‐‐
blsp_i2c6: i2c@78ba000
cci_i2c0: i2c@1b0c000
blsp_i2c4: i2c@78b8000
blsp_i2c3: i2c@78b7000
QUP I2C adapter
QUP I2C adapter
QUP I2C adapter
32
0x30: External RTC
M.2
0x39: AD7535 (HDMI)
Pin Header
I2C
I2C
I2C