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Software adaption

Example devicetree

The following implements Devicetree nodes are implementing the P140 functionallity for the tca6408 and pca9685 component.

The following devicetree snippet is only an example. The IĀ²C controller depends on your hardware setup. 

/*
 * Copyright (c) 2023, AUVIDEA. All rights reserved.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or any
 * later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 */

/ {
    i2c@c240000 {
        p140_control_tca6408: p140_tca6408@21 {
            compatible = "ti,tca6408";
            reg = <0x21>;
	    vcc-supply = <&battery_reg>;
            gpio-controller;
            #gpio-cells = <2>;
            gpio-line-names = "", "", "RESET_POE", "/INT", "EN_PCA", "PGOOD_48V", "EN_48V", ""; 
            
            // this is required for the PCA to be enabled
            en_pca { 
		gpio-hog;
		gpios = <4 0>;
		output-low;
		line-name = "EN_PCA";
	    };
        };

        p140_control_pca9685: p140_pca9685@54 {
            compatible = "nxp,pca9685-pwm";
            #pwm-cells = <2>;
            reg = <0x54>;
	    gpio-line-names = "", "LED4_G", "LED4_R", "LED4_B", "LED3_G", "LED3_R", "LED3_B",
                                "LED2_G", "LED2_R", "LED2_B", "LED1_G", "LED1_R", "LED1_B",
                                "LED0_G", "LED0_R", "LED0_B", "CTL_ALL";
        };
    };
};

Bash Script

Ethernet Switch (KSZ9896C)

This code is meant to initializing the board correctly. Because the settings will reset every time you reboot the board, it is necessary to run this script on every start of the board. The script can take some time to show some response, so wait some time and set the script run until it prints ā€œDone!ā€ in the console.

GPIO Control

This script is made to control specific GPIO Ports which are connected to preset outputs/inputs to check there status or set them to a specific state

All action

Example

PWM Controller (PCA9685)

This script is made to control the PWM Controller, to turn on/off specific/all LEDs on the board

All action

Example

PoE Power Controller (TPS23861)

This script is made to control the PoE Controller on the board. It is possible to set specific ports to on, off or change there mode or turn them off completely

All action

Example

PreviousPinout Description

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