关于mini2440的一个裸机程序——LED与按键中断

/*

*File:main.c

*Description:Whenyoupressthekey,

*theLEDwillshowthekey_valueofkeybythebinary

*andproducethebuzzer.

*Author:Cong

*Copyright:Cong

*

*

*History

*---------------------

*Rev:0.0

*Date:2011/11/26

*Creat.

*--------------------

*

*

*/

//--------------------IncludeFiles------------------------------------//

#include"2440addr.h"

#include"2440slib.h"

//---------------------DefineValurable-------------------------------//

#defineGLOBAL_CLK1

#defineLED1_ON~(1<<5)

#defineLED2_ON~(1<<6)

#defineLED3_ON~(1<<7)

#defineLED4_ON~(1<<8)

#defineLED1_OFF(1<<5)

#defineLED2_OFF(1<<6)

#defineLED3_OFF(1<<7)

#defineLED4_OFF(1<<8)

#defineBEEP0

#defineLED110

#defineLED212

#defineLED314

#defineLED416

#defineKEY10

#defineKEY26

#defineKEY310

#defineKEY412

#defineKEY514

#defineKEY622

//--------------------FunctionPrototype------------------------------//

staticvoidLEDKEY_port_init(void);

staticvoidShow_num(intnum);

staticvoidBeep_run(void);

staticvoiddelay(unsignedinttimes);

staticvoid__irqkey_handler(void);

/*

*

*程序入口

*/

voidMain(void)

{

LEDKEY_port_init();

while(1)

{

}

}

/*

*===================Function======================

*Name:Port_init

*Discription:inittheGPIO

*=================================================

*/

staticvoidLEDKEY_port_init(void)

{

//初始化LED与BEEP所要用到的IO用到的这五个端口都配置为输出

rGPBCON&=~((3<

rGPBCON|=(1<

//初始化KEY所用的IO所有的KEY端口都初始化为中断方式

rGPGCON&=~((3<

rGPGCON|=(2<

//中断初始化EINT8

//rEXTINT1&=~((0xf)|(0xf<<12)|(0xf<<20)|(0xf<<24)|(0xf<<28));//设置K1的低电平中断

rEXTINT1&=~0xfff0f00f;

rEXTINT2&=~(0xf<<12);

rEINTPEND|=(1<<8)|(1<<11)|(1<<13)|(1<<14)|(1<<15)|(1<<19);//清除K1的中断标志

rEINTMASK=~((1<<8)|(1<<11)|(1<<13)|(1<<14)|(1<<15)|(1<<19));//打开EINT8的中断使能

pISR_EINT8_23=(U32)key_handler;

EnableIrq(BIT_EINT8_23);//外部中断8-23共用的中断位使能，与ClearPending对应

}

/*

*===================Function======================

*Name:Show_num

*Discription:inittheGPIOofKey

*=================================================

*/

staticvoidShow_num(intdata)

{

if(data&0x08)rGPBDAT=rGPBDAT&(LED4_ON);

elserGPBDAT=rGPBDAT|(LED4_OFF);

if(data&0x04)rGPBDAT=rGPBDAT&(LED3_ON);

elserGPBDAT=rGPBDAT|(LED3_OFF);

if(data&0x02)rGPBDAT=rGPBDAT&(LED2_ON);

elserGPBDAT=rGPBDAT|(LED2_OFF);

if(data&0x01)rGPBDAT=rGPBDAT&(LED1_ON);

elserGPBDAT=rGPBDAT|(LED1_OFF);

}

/*

*===================Function======================

*Name:Beep_run

*Discription:producethebuzzer

*=================================================

*/

staticvoidBeep_run(void)

{

rGPBDAT|=(0x1<<0);

delay(50);

rGPBDAT&=(0x0<<0);

delay(50);

}

/*

*===================Function======================

*Name:delay

*Discription:producedelay,thetimeistimes.

*=================================================

*/

staticvoiddelay(unsignedinttimes)

{

unsignedinti;

for(;times>0;times--)

{

for(i=400;i>0;i--);

}

}

/*

*===================Function======================

*Name:key_handler

*Discription:whenthekeyispressed,

*theIRQservicewillberun.

*=================================================

*/

staticvoid__irqkey_handler(void)

{

Beep_run();

if(rEINTPEND&(1<<8))

{