iar-

IAR_example_EasyARM8962.zip

/****************************************Copyright (c)****************************************************
**                               Guangzhou ZHIYUAN electronics Co.,LTD.
**                                     
**                                 http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File Name:               GPIO_IN_OUT.c
** Last modified Date:      2007.12.24
** Last Version:            V1.1
** Description:             Stellaris系列单片机GPIO口操作
** 
**--------------------------------------------------------------------------------------------------------
** Created By:              Zhou Hai Xin
** Created date:            2007.09.20 
** Version:                 V1.0
** Descriptions:            扫描按键是否按下，如果按键按下则点亮LED指示灯，否则熄灭LED指示灯。
**
**--------------------------------------------------------------------------------------------------------
** Modified by:             Kang qinhua  
** Modified date:           2008.01.12
** Version:                 V1.1
** Description:
**
*********************************************************************************************************/

#include "hw_memmap.h"
#include "hw_types.h"
#include "gpio.h"
#include "sysctl.h"
#include "systick.h"

#define KEY1   GPIO_PIN_2                                               /*  定义KEY1                    */
#define LED3   GPIO_PIN_6                                               /*  定义LED3                    */

/*********************************************************************************************************
** Function name:           main 
** Descriptions:            通过判断KEY1有没有按下，按下则点亮LED3，否则熄灭LED3。
** input parameters:        NONE
** output parameters:       NONE
** Returned value:          NONE
** Created By:              Zhou Hai Xin
** Created date:            2007.09.20
**--------------------------------------------------------------------------------------------------------
** Modified by:             
** Modified date:           
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
int main(void)
{
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);                        /*  使能GPIO PB口               */
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);                        /*  使能GPIO PE口               */	
   
    GPIODirModeSet(GPIO_PORTE_BASE, KEY1, GPIO_DIR_MODE_IN);            /*  设置连接KEY1的PD4为输入     */
    GPIODirModeSet(GPIO_PORTB_BASE, LED3, GPIO_DIR_MODE_OUT);	        /*  设置连接LED3的PD7为输出     */

    GPIOPadConfigSet(GPIO_PORTE_BASE, KEY1,                             /*  设置KEY1强度和类型          */
                     GPIO_STRENGTH_4MA,                                 /*  4mA的输出驱动强度           */
                     GPIO_PIN_TYPE_STD);                                /*  设置为推挽管脚              */
    
    GPIOPadConfigSet(GPIO_PORTB_BASE, LED3,                             /*  设置LED3的驱动强度和类型    */
                     GPIO_STRENGTH_4MA,                                 /*  4mA的输出驱动强度           */
                     GPIO_PIN_TYPE_STD);                                /*  设置为推挽管脚              */

    while (1) {
        if (GPIOPinRead(GPIO_PORTE_BASE, KEY1)) {                       /*读KEY1引脚的值，并判断，      */
                                                                        /*  如果为高，则熄灭LED3        */
            GPIOPinWrite(GPIO_PORTB_BASE, LED3, LED3);
        } else {                                                        /*  否则点亮LED3                */
            GPIOPinWrite(GPIO_PORTB_BASE, LED3, ~LED3);
        }
    }
}

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