demo.c

来自「ARM开发环境IAR下针对ZLG的实验板EasyARM8962的应用示例程序」· C语言 代码 · 共 99 行

/****************************************Copyright (c)****************************************************
**                            Guangzhou ZHIYUAN electronics Co.,LTD.
**                                      
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name:               demo.c
** Latest modified Date:    2008-01-03
** Latest Version:          1.0
** Descriptions:            GPIO控制LED演示程序,用短路环把EasyARM8962的JP3的PA4－LED5短接，本程序控制LED5
**                          来闪烁
**
**--------------------------------------------------------------------------------------------------------
** Created by:              Zhao shimin
** Created date:            2008-01-03
** Version:                 1.0
** Descriptions:            The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
** Version:                 
** Descriptions:            
**
*********************************************************************************************************/
#include "hw_ints.h"
#include "hw_memmap.h"
#include "hw_types.h"
#include "gpio.h"
#include "sysctl.h"
#include "cpu.h"
#include "interrupt.h"

#define     PIN4        GPIO_PIN_4                                      /*  PA4控制LED5                 */


/*********************************************************************************************************
** Function name:           delay 
**
** Descriptions:            延时程序
**
** input parameters:        a 延时初值，值越大延时时间越长
** output parameters:       NONE
**
** Returned value:          NONE
**
** Created by:              Zhao shimin
** Created Date:            2008/01/03
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void delay (int a)
{  
    for (; a > 0; a--);  
}
/*********************************************************************************************************
** Function name:           main 
**
** Descriptions:            GPIO控制LED演示程序
**
** input parameters:        NONE
** output parameters:       NONE
**
** Returned value:          NONE
**
** Created by:              Zhao shimin
** Created Date:            2008/01/03
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/ 
int main(void)
{  
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_6MHZ);
    
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    
    GPIODirModeSet(GPIO_PORTA_BASE, PIN4, GPIO_DIR_MODE_OUT);
    GPIOPadConfigSet(GPIO_PORTA_BASE,  PIN4, GPIO_STRENGTH_8MA,
                     GPIO_PIN_TYPE_STD_WPU);   
   
    for (;;)
    {  
       
       GPIOPinWrite(GPIO_PORTA_BASE, PIN4,  PIN4);
       delay(1000000);
       GPIOPinWrite(GPIO_PORTA_BASE, PIN4,  ~PIN4); 
       delay(1000000);
    }
   
}
/*********************************************************************************************************
  END FILE
*********************************************************************************************************/