BEAGLEBK: EEPROM read and write issue

Vikas Dubey

Intellectual 390 points

Part Number: BEAGLEBK

Hi,

I have to read and write to EEPROM using /dev/i2c...nodes.

I read at below site that eeprom is accessbile through i2c-1. But i2c is disabled.

Please assist me to enable i2c-1 in sdk.

Best Regards,

Vikas

over 8 years ago

0 Vikas Dubey over 8 years ago

Intellectual 390 points

Hi ,

I am using Beagle bone black and TISDK argo package.

Best Regards,
Vikas

0 Kemal R. Shakir over 8 years ago in reply to Vikas Dubey

TI__Guru 55345 points

Hello Vikas,

Please, see this post.

Best regards,
Kemal

0 Vikas Dubey over 8 years ago in reply to Kemal R. Shakir

Intellectual 390 points

Hi Kemal,

The i2c is already enabled in dts file.

                    pinmux_i2c0_pins {
                       pinctrl-single,pins = <0x188 0x30 0x18c 0x30>;
                       linux,phandle = <0x34>;
                       phandle = <0x34>;
                   };

                   pinmux_i2c2_pins {
                       pinctrl-single,pins = <0x178 0x33 0x17c 0x33>;
                       linux,phandle = <0x38>;
                       phandle = <0x38>;
                   };

I am able to read i2cget -y -f 0 0x50 0x00 eeprom.

but when I write i2cset -y -f 0 0x50 0x00 0x00 to eeprom, value is not reflected.

Kindly help me.

Bet regards,

Vikas

0 Kemal R. Shakir over 8 years ago in reply to Vikas Dubey

TI__Guru 55345 points

Use eeprog command to program your EEPROM. i2cset cannot be used because of its absence of 16-bit address mode choice.
root@am335x-evm:~# echo -n -e '\x69' | eeprog -f -16 /dev/i2c-0 0x50 -w 0x30
root@am335x-evm:~# eeprog -xf -16 /dev/i2c-0 0x50 -r 48:1

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BEAGLEBK: EEPROM read and write issue