Dell S5212F-ON Open Networking Hardware Diagnostic Guide December 2021 - Page 36

i2ctool -w -b /dev/i2c- -a -R -W -V Write(16 bit addressing):= i2ctool --write --bus=/dev/i2c- --addr= -- reg16= [--reg_le] --val= (or) i2ctool -w -b /dev/i2c- -a -o [-L] -V Usage: -h, --h -n, --scan -t, --test -r, --read -w, --write -f, --config= -C, --count= -R, --reg= -o, --reg16= -V, --val= -W, --width= -b, --buspath= -a, --addr= -D, --display_size= -I, --iteration= Show the help text Scan operation Test using the pre-programmed configuration or use supplied config Read operation Write operation To specify the location of the config file e.g. /etc/dn/diag/ Count Register Register(16 bit addressing) Value to be set Width {8,16} To specify the i2c bus e.g.: /dev/i2c- Address Display size, {1,2,4} of bytesDisplay size, {1,2,4} of bytes Iteration command execution Output NOTE: The i2ctool does not automatically scan multiple MUXed segments. Before scanning, you MUST set the MUXes to select the devices you want to see on the busses. By default, the i2ctool scans the i2c devices from the root MUX where it sees the list of devices directly connected to the CPU MUX. The default scan function scans all connected busses. By specifying a bus, you can limit the scan to one bus. In the scan data, RR indicates a reserved address which is not used for any devices and UU indicates that the device is busy or mapped to the OS. scan Output root@dell-diag-os:/etc/dn/diag# i2ctool --scan 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: RR RR RR RR RR RR RR RR 10 18 -- 1a 20 2e -30: 30 -- 32 40 50: 50 -- 52 60 69 70 RR RR RR RR RR RR RR RR 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: RR RR RR RR RR RR RR RR 10 20 30 3e -40 50: 50 51 52 53 54 55 56 57 60 70: 70 RR RR RR RR RR RR RR RR I2C devices found on bus #0: 8 0x18 0x1a 0x2e 0x30 0x32 0x50 0x52 0x69 I2C devices found on bus #1: 10 0x3e 0x50 0x51 0x52 0x53 0x54 0x55 0x56 0x57 0x70 root@dell-diag-os:/etc/dn/diag# 36 Dell EMC DAIG-OS tools