sysled.c

来自「WINDRIVER 8260 ATM BSP」· C语言 代码 · 共 132 行

/* sysLed.c - Wind River 8260 User LED driver */

/* Copyright 1984-2000 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01a,30jul01,g_h  created from T2 SBC8260/sysLib.c 
*/
/*
DESCRIPTION
This module contains the LED driver.

INCLUDES: sysLed.h
*/

/* includes */
#include "sysLed.h"

#ifdef INCLUDE_SYSLED

/* locals */

LOCAL UINT8 sysLed;

/***********************************************************************
*
* sysLedInit - Initialize LEDs.
*
* This routine initializes the LED variable to zero and clears
* all LEDs.
*
* RETURNS: N/A.
*
* SEE ALSO: sysLedOn(), sysLedOff(), sysLedControl().
*/

void sysLedInit
    (
    void
    )
    {
    sysLed = 0;

    /*
     * Write to LED.
     */
    BSCR_LED_REGISTER = sysLed;
    }

/***********************************************************************
*
* sysLedOff - Turn selected LED off.
*
* This routine set the selected LED to off.
*
* RETURNS: N/A.
*
* SEE ALSO: sysLedInit(), sysLedOff(), sysLedControl().
*/

void sysLedOff
    (
    UINT8 led
    )
    {
    sysLed &= ~led;

    /*
     * Write to LED.
     */
    BSCR_LED_REGISTER = sysLed;
    }

/***********************************************************************
*
* sysLedOn - Turn selected LED on.
*
* This routine set the selected LED to on.
*
* RETURNS: N/A.
*
* SEE ALSO: sysLedInit(), sysLedOn(), sysLedControl().
*/

void sysLedOn
    (
    UINT8 led
    )
    {
    sysLed |= led;

    /*
     * Write to LED.
     */
    BSCR_LED_REGISTER = sysLed;
    }

/***********************************************************************
*
* sysLedControl - Turn selected LED(s) on or off.
*
* This routine sets the selected LED on or off.
*
* RETURNS: N/A.
*
* SEE ALSO: sysLedInit(), sysLedOff(), sysLedOn().
*/

void sysLedControl 
    (
    int   ledOn, 
    UINT8 led
    )
    {
    /*
     * Check led state.
     */
    if (ledOn)
       sysLed |= led;      /* Set LED on. */
    else
       sysLed &= ~led;     /* Set LED off. */

    /*
     * Write to LED.
     */
    BSCR_LED_REGISTER = sysLed;
    }

#endif /* INCLUDE_SYSLED */