demo.c

ARM的一个简单的程序它能点亮一个灯 程序非常简单

/****************************************Copyright (c)**************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.embedtools.com
**
**--------------File Info-------------------------------------------------------------------------------
** File Name:           demo.c
** Last modified Date:  2006-11-15 
** Last Version:        v1.0
** Description:         Cross Studio for ARM Demo程序
** 
**------------------------------------------------------------------------------------------------------
** Created By:          Zhou Lishan
** Created date:        2006-11-15 
** Version:             v1.0
** Descriptions:
**
**------------------------------------------------------------------------------------------------------
** Modified by:         Kang qinhua
** Modified date:       2008.01.18
** Version:             v1.1
** Description:
**
********************************************************************************************************/
#include "hw_ints.h"
#include "hw_memmap.h"
#include "hw_types.h"
#include "gpio.h"
#include "sysctl.h"


#define PINS    GPIO_PIN_4

void delay(int d)
{
  for( ; d; --d);
}

int main(void)
{
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_6MHZ);               //敲定系统时钟1  外部晶体    表明以外部晶体为主    晶振为6

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);     //使能PC口的GPIO外设备功能
    GPIODirModeSet(GPIO_PORTC_BASE, GPIO_PIN_4, GPIO_DIR_MODE_OUT);    // 先定义GPIO B为输出   PIN4管脚   设定GPIO的输出   
    while(1) {
       GPIOPinWrite(GPIO_PORTC_BASE, PINS, PINS);    //pins  ???   
       delay(200000);
       GPIOPinWrite(GPIO_PORTC_BASE, PINS, ~PINS);
       delay(200000);
    } 
}

/*********************************************************************************************************
  END FILE
*********************************************************************************************************/