blinky.c

最新版IAR FOR ARM（EWARM）5.11中的代码例子

//*****************************************************************************
//
// blinky.c - Simple example to blink the on-board LED.
//
// Copyright (c) 2007 Luminary Micro, Inc.  All rights reserved.
// 
// Software License Agreement
// 
// Luminary Micro, Inc. (LMI) is supplying this software for use solely and
// exclusively on LMI's microcontroller products.
// 
// The software is owned by LMI and/or its suppliers, and is protected under
// applicable copyright laws.  All rights are reserved.  You may not combine
// this software with "viral" open-source software in order to form a larger
// program.  Any use in violation of the foregoing restrictions may subject
// the user to criminal sanctions under applicable laws, as well as to civil
// liability for the breach of the terms and conditions of this license.
// 
// THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
// OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
// LMI SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
// CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 1952 of the Stellaris Peripheral Driver Library.
//
//*****************************************************************************

#include "../../../inc/lm3s102.h"

//*****************************************************************************
//
//! \addtogroup dk_lm3s102_list
//! <h1>Blinky (blinky)</h1>
//!
//! A very simple example that blinks the on-board LED.
//
//*****************************************************************************

//*****************************************************************************
//
// Blink the on-board LED.
//
//*****************************************************************************
int
main(void)
{
    volatile unsigned long ulLoop;

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOB;

    //
    // Do a dummy read to insert a few cycles after enabling the peripheral.
    //
    ulLoop = SYSCTL_RCGC2_R;

    //
    // Enable the GPIO pin for the LED (PB0).  Set the direction as output, and
    // enable the GPIO pin for digital function.  Care is taken to not disrupt
    // the operation of the PB7/TRST pin.
    //
    GPIO_PORTB_DIR_R |= 0x01;
    GPIO_PORTB_DEN_R |= 0x01;

    //
    // Loop forever.
    //
    while(1)
    {
        //
        // Turn on the LED.
        //
        GPIO_PORTB_DATA_R |= 0x01;

        //
        // Delay for a bit.
        //
        for(ulLoop = 0; ulLoop < 200000; ulLoop++)
        {
        }

        //
        // Turn off the LED.
        //
        GPIO_PORTB_DATA_R &= ~(0x01);

        //
        // Delay for a bit.
        //
        for(ulLoop = 0; ulLoop < 200000; ulLoop++)
        {
        }
    }
}