PRU GPIO Access in the Pocketbeagle2

Dhaval_Kapupara · August 4, 2025, 12:08pm

Hi There,

We have been working with the pocketbeagle, now, since it is discontinued and updated version is available, we are thinking to migrate on the same. I have two questions as follows.

How can i configure the Gpio as pru_in or pru_out? like we used to do in pocketbeagle1 using ‘config-pin’. Can i get any suggestions or reference?
How can i use the ethernet cap for enc28j60? in Pocketbeagle, we had used PB-SPI00-ETH-CLICK, I have tried to modify the ''k3-am62-pocketbeagle2-spi2-eth-wiz-click.dtso but not able to work.

Regards & Thanks,
Dhaval

Juvinski · August 5, 2025, 1:17pm

Hi,

about the pins, you should use the device tree for that.

github.com/beagleboard/BeagleBoard-DeviceTrees

src/arm64/overlays/k3-am62-pocketbeagle2-ardupilot-cape.dtso

1edee6ad2


      
                      	AM62X_IOPAD(0x00CC, PIN_OUTPUT, 4) /* P1.20(Y24) UART4_TXD */
                  	>;
              	};
                  main_uart5_pins_default: main-uart5-default-pins {
                          pinctrl-single,pins = <
                          AM62X_IOPAD(0x00D0, PIN_INPUT, 4) /* P2.24 (Y23) UART5_RXD */
                          AM62X_IOPAD(0x00D4, PIN_OUTPUT, 4) /* P2.33(AA25) UART5_TXD */
                          >;
                  };
          
          	main_prus_pins: main-prus-pins {
          		pinctrl-single,pins = <
          		AM62X_IOPAD(0x00FC, PIN_OUTPUT_PULLDOWN, 5) /* P1.29 - RCOUT 1*/
          		AM62X_IOPAD(0x00F0, PIN_OUTPUT_PULLDOWN, 5) /* P1.31 - RCOUT 2*/
          		AM62X_IOPAD(0x00E4, PIN_OUTPUT_PULLDOWN, 5) /* P1.33A - RCOUT 3*/
          		AM62X_IOPAD(0x00F4, PIN_OUTPUT_PULLDOWN, 5) /* P2.34 - RCOUT 4*/
          
          		AM62X_IOPAD(0x0104, PIN_INPUT_PULLUP, 8) /* P2.17 - RCINPUT*/
          		>;
          	};
          };

about the cape I don’t know.

Dhaval_Kapupara · August 11, 2025, 4:36am

@Juvinski Thanks!

Juvinski · August 11, 2025, 2:17pm

There is the second part at the bottom to