CNC.dts

/*
 * Copyright (C) 2013 Nathaniel R. Lewis - http://nathanielrlewis.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 * 
 * CAPE destinée à être implémentée sur une CNC fraiseuse
 * 
 */
/dts-v1/;
/plugin/;

/ {
    compatible = "ti,beaglebone", "ti,beaglebone-black";

    /* identification */
    part-number = "CNC";
    version     = "00A0";
    
    /* state the resources this cape uses */
    exclusive-use =
            /* the pin header uses */
            "P9.25",		/* xstep :  0x1AC mode 5*/
            "P9.27",		/* xdir  :  0x1A4 mode 5*/
            "P9.28",		/* ystep :  0x19C mode 5*/
            "P9.29",		/* ydir  :  0x194 mode 5*/
            "P8.11",		/* zstep :  0x034 mode 6*/
            "P8.12",		/* zdir  :  0x030 mode 6*/
            "P9.11",		/* xlim  :  0x070 mode 27*/
            "P9.13",		/* ylim  :  0x074 mode 27*/
            "P8.13",		/* zlim  :  0x024 mode 27*/
            "P9.18",		/* xok   :  0x158 mode 7*/
            "P9.17",		/* yok   :  0x15C mode 7*/
            "P8.14",		/* zok   :  0x028 mode 7*/
            "P8.15",		/* RELAY :  0x03C mode 7*/
            "P9.26",		/* xen   :  0x180 mode 7*/
            "P9.24",		/* yen   :  0x184 mode 7*/
            "P8.10";		/* zen   :  0x098 mode 7*/
    fragment@0 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            pinctrl_CNC_PRU: pinctrl_CNC_PRU_pins {
                pinctrl-single,pins = <					 		
                		0x1AC 0x05  /* P9_25  PRU 0 out   - xstep */
       			       	0x1A4 0x05  /* P9_27  PRU 0 out   - xdir */
       			       	0x19C 0x05  /* P9_28  PRU 0 out   - ystep */
       			       	0x194 0x05  /* P9_29  PRU 0 out   - ydir */
		               	0x034 0x06  /* P8_11  PRU 0 out   - zstep */
		               	0x030 0x06  /* P8_12  PRU 0 out   - zdir */
                >;
            };
        };
    };
	fragment@1 {
        target = <&am33xx_pinmux>;
        __overlay__ {
            pinctrl_CNC_GPIO: pinctrl_CNC_GPIO_pins {
                pinctrl-single,pins = <                                           
                                0x070 0x27  /* P9_11  GPIO        - xlim  */
                                0x074 0x27  /* P9_13  GPIO        - ylim  */
                                0x024 0x27  /* P8_13  GPIO        - zlim */

                                0x158 0x07  /* P9_18 113 GPIO     - xok */
                                0x15C 0x07  /* P9_17 113 GPIO     - yok */
                                0x028 0x07  /* P8_14 113 GPIO     - zok */ 


                                0x03C 0x07  /* P8_15 113 GPIO     - RELAY */
                               
				0x180 0x07  /* P9_26 113 GPIO     - xen */
                                0x184 0x07  /* P9_24 113 GPIO     - yen */
                                0x098 0x07  /* P8_10 113 GPIO     - zen */
                >;
            };
	};
	};

	fragment@2 {
        	        target = <&ocp>;
               		 __overlay__ {
                       		 test_helper: helper {
                                compatible = "bone-pinmux-helper";
                                pinctrl-names = "default";
                                pinctrl-0 = <&pinctrl_CNC_GPIO>;
                                status = "okay";
                       		 };
               		 };
       		 };
// This enables the PRU and assigns the GPIO pins to it for use in EGP mode.  
   fragment@3 {  
    target = <&pruss>;  
    __overlay__ {  
      status = "okay";  
      pinctrl-names = "default";  
      pinctrl-0 = <&pinctrl_CNC_PRU>;  
    };  
   };  
};