Desktop/xinu_mips-1.0.2.tar/xinu_mips-1.0.2/shell/xsh_led.c

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/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */

#include <kernel.h>
#include <gpio.h>
#include <stdio.h>
#include <string.h>

command xsh_led(ushort stdin, ushort stdout, ushort stderr,
                ushort nargs, char *args[])
{
        ulong led; /* led to control */

        /* Output help, if '--help' argument was supplied */
        if (nargs == 2 && strncmp(args[1],"--help",6) == 0) 
        {
                fprintf(stdout, "Usage:led DESCRIPTOR STATE\n");
                fprintf(stdout, "Turns a specified led on or off.\n");
                fprintf(stdout, "\tDESCRIPTOR: dmz, wlan, power, ciscow, ciscoo\n");
                fprintf(stdout, "\tSTATE: on, off\n");
                fprintf(stdout, "\t--help\t display this help and exit\n");
                return OK;
        }

        /* Check for correct number of arguments */
        if (nargs < 3)
        {
                fprintf(stderr,"led: missing operand\n");
                fprintf(stderr,"Try 'led --help' for more information\n");
                return SYSERR;
        }
        if (nargs > 3)
        {
                fprintf(stderr,"led: too many arguments\n");
                fprintf(stderr,"Try 'led --help' for more information\n");
                return SYSERR;
        }

        /* find led to change */
        if (strncmp(args[1],"dmz",3) == 0) { led = GPIO_LED_DMZ; }
        else if (strncmp(args[1],"wlan",4) == 0) { led = GPIO_LED_WLAN; }
        else if (strncmp(args[1],"power",5) == 0) { led = GPIO1; }
        else if (strncmp(args[1],"ciscow",6) == 0) { led = GPIO_LED_CISCOWHT; }
        else if (strncmp(args[1],"ciscoo",6) == 0) { led = GPIO_LED_CISCOONG; }
        else
        {
                fprintf(stderr,"led: invalid DESCRIPTOR\n");
                fprintf(stderr,"Try 'led --help' for more information\n");
        }
        
        /* change led state */
        if (strncmp(args[2],"on",2) == 0) { GPIO_CTRL_LED_ON(led); }
        else if (strncmp(args[2],"off",3) == 0) { GPIO_CTRL_LED_OFF(led); }
        else
        {
                fprintf(stderr,"led: invalid STATE\n");
                fprintf(stderr,"Try 'led --help' for more information\n");
        }

        return OK;
}

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