AM335X SDK8.0 Device Tree pin mux config

xin Ryan

Dear everyone,

Study AM335X SDK8.0, pin mux config on Device Tree file, for example:

i2c0_pins: pinmux_i2c0_pins {
  pinctrl-single,pins = <
   0x188 (PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_sda.i2c0_sda */
   0x18c (PIN_INPUT_PULLUP | MUX_MODE0) /* i2c0_scl.i2c0_scl */
  >;
};

The i2c0_sda pin, the pin number is 0x188, how the i2c0_sda pin definition for 0x188?

Thank you very much to help me!

over 10 years ago

0 Diego Melendez over 10 years ago

TI__Guru 57800 points

Hi Ryan,

I will move this question to Sitara Processors forum, one of my colleagues may be able to help you with your question.

Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Padmaja Nimmagadda over 10 years ago

TI__Expert 5005 points

Hello Ryan,

It is an offset off of 0x800 where the pin mux registers start

Since the i2c0 registers are at 0x988 and 0x98C, the offset from 0x800 is 0x188 and 0x18C

Thanks,

Padmaja

-----

From the TRM

988h conf_i2c0_sda Section 9.3.1.49

98Ch conf_i2c0_scl Section 9.3.1.49

0 xin Ryan over 10 years ago in reply to Padmaja Nimmagadda

Expert 1140 points

Hi,Padmaja
The first, thank you, I stusy SDk6.0, the pin definition in mux33xx.h file
The second, I study SDK8.0 config drvice tree refer to the SDK6.0(mux33xx.h) file
The last, thank you again your help!