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

ARM菜鸟外部中断学习笔记

HotPower@126.com2005.7.21 与西安大雁塔村队部

-----------------------------------------------------------------------*/

/***********************************************************************/

/*This file is part of the CA ARM C Compiler package*/

/*Copyright KEIL ELEKTRONIK GmbH 2002 - 2004*/

/***********************************************************************/

/**/

/*MAIN.C:Demonstration of various interrupt functions*/

/**/

/***********************************************************************/

#include // Philips Peripheral Registers

#include "LPC21xxDEF.H"//ARM菜鸟HotPower创建定义文件

/*

* software interrupt function accept parameters and run in

* supervisor mode (interrupt protected).

*/

int myfunc1 (int i1, long i2) __swi (8){

return (i1 / i2);

}

int myfunc2 (int i1) __swi (9){

return (i1<<4);

}

/*

* standard interrupt function saves only R0 - R12 and returns with

*/

void DefaultIRQ (void) __irq {

unsigned int temp;

temp = VICIRQStatus;

IOPIN1 ^= (1 << P1_15);//取反P1.15

}

void EINT0IRQ (void) __irq {

unsigned int temp;

temp = VICIRQStatus;

IOPIN1 ^= (1 << P1_16);//取反P1.16

EXTINT = (1 << EINT0);//清除INT0中断标志

VICVectAddr = 0;

}

void EINT1IRQ (void) __irq {

unsigned int temp;

temp = VICIRQStatus;

IOPIN1 ^= (1 << P1_14);//取反P1.14

EXTINT = (1 << EINT1);//清除INT1中断标志

VICVectAddr = 0;

}

/*

* fast interrupt function saves only R0 - R7 and returns with

*/

void FIQ_Handler (void)__fiq{

//IOSET1 = 0x00010000;// Set pin P1.16

//IOSET1 = (1 << P1_15);// Set pin P1.15

IOPIN1 ^= (1 << P1_15);//取反P1.15

//EXTINT = 0x00000002;// Clear the peripheral interrupt flag

EXTINT = (1 << EINT2);//清除INT2中断标志

}

/*

* task functions have no register save/restore and no return.

*/

void tsk (void) __task {

while (1);

}

/*

* Sample 'main' function

*/

int res;

void main (void){

//IODIR1= 0x00FF0000;// Set the LED pins as outputs

IODIR1= (1 << P1_23) | (1 << P1_22) | (1 << P1_21) | (1 << P1_20)

|(1 << P1_19) | (1 << P1_18) | (1 << P1_17) | (1 << P1_16);//设置LED输出方式

//PINSEL0= 0x20000000;// Enable the EXTINT1 interrupt

PINSEL0|= (P0_14_EINT1 << P0_14_PINSEL);//选择P0.14为INT1外部中断引脚

EXTMODE|= (1 << EXTMODE1);//设置INT1为边沿触发,低电平有效

PINSEL1|= (P0_16_EINT0 << P0_16_PINSEL);//选择P0.16为INT0外部中断引脚

EXTMODE|= (1 << EXTMODE0);//设置INT1为边沿触发,低电平有效

PINSEL0|= (P0_15_EINT2 << P0_15_PINSEL);//选择P0.15为INT2外部中断引脚

EXTMODE|= (1 << EXTMODE2);//设置INT2为边沿触发,低电平有效

//VICVectAddr15= (unsigned long) DefaultIRQ;

//VICIntSelect= 0x00008000;// Enable a Vic Channel as FIQ

VICIntSelect= (1 << VICIntSel_EINT2);// Enable a Vic Channel as FIQ

//VICIntSelect= 0;// Enable a Vic Channel as FIQ

VICVectCntl0= VICIntSel_Enable | VICIntSel_EINT0;

VICVectAddr0= (unsigned long *) &EINT0IRQ;//取INT0中断服务地址

VICVectCntl1= VICIntSel_Enable | VICIntSel_EINT1;

VICVectAddr1= (unsigned long *) &EINT1IRQ;//取INT1中断服务地址

//VICIntEnable= 0x00008000;// Set Default interrupt vector

VICIntEnable= (1 << VICIntSel_EINT0)

| (1 << VICIntSel_EINT1)

| (1 << VICIntSel_EINT2);//使能中断

EXTINT = (1 << EINT0) | (1 << EINT1) | (1 << EINT2);//清除INT中断标志

//VICDefVectAddr = (unsigned long *) &DefaultIRQ;

//VICSoftInt= (1 << VICIntSel_EINT1);

res = myfunc1 (10, 2);// call SWI functions

res += myfunc2 (res);

while (1);// endless loop

}

LPC21XXDEF.H

/*----------------------------------------------------

文件名:LPC21XXDEF.H

创建人:ARM菜鸟HotPower@126.com

最近修改日期:2005.7.21

创 建 地 点 ： 西安大雁塔村队部

------------------------------------------------------*/

#ifndef __LPC21xxDEF_H

#define __LPC21xxDEF_H

#define BV(val) (1 << val)

#define VICIntSel_Watchdog0

#define VICIntSel_VicInt11

#define VICIntSel_VicInt22

#define VICIntSel_VicInt33

#define VICIntSel_Time04

#define VICIntSel_Time15

#define VICIntSel_UART06

#define VICIntSel_UART17

#define VICIntSel_PWM8

#define VICIntSel_I2C09

#define VICIntSel_SPI010

#define VICIntSel_SSP11

#define VICIntSel_PLLLock12

#define VICIntSel_RTC13

#define VICIntSel_EINT014

#define VICIntSel_EINT115

#define VICIntSel_EINT216

#define VICIntSel_EINT317

#define VICIntSel_ADC018

#define VICIntSel_I2C119

#define VICIntSel_BOD20

#define VICIntSel_ADC121

#define VICIntSel_VicInt22 22

#define VICIntSel_VicInt23 23

#define VICIntSel_VicInt24 24

#define VICIntSel_VicInt25 25

#define VICIntSel_VicInt26 26

#define VICIntSel_VicInt27 27

#define VICIntSel_VicInt28 28

#define VICIntSel_VicInt29 29

#define VICIntSel_VicInt30 30

#define VICIntSel_VicInt31 31

#define VICIntSel_Enable32

//

#define P0_00//P0.0

#define P0_11//P0.1

#define P0_22//P0.2

#define P0_33//P0.3

#define P0_44//P0.4

#define P0_55//P0.5

#define P0_66//P0.6

#define P0_77//P0.7

#define P0_88//P0.8

#define P0_99//P0.9

#define P0_10 10//P0.10

#define P0_11 11//P0.11

#define P0_12 12//P0.12

#define P0_13 13//P0.13

#define P0_14 14//P0.14

#define P0_15 15//P0.15

#define P0_16 16//P0.16

#define P0_17 17//P0.17

#define P0_18 18//P0.18

#define P0_19 19//P0.19

#define P0_20 20//P0.20

#define P0_21 21//P0.21

#define P0_22 22//P0.22

#define P0_23 23//P0.23

#define P0_24 24//P0.24

#define P0_25 25//P0.25

#define P0_26 26//P0.26

#define P0_27 27//P0.27

#define P0_28 28//P0.28

#define P0_29 29//P0.29

#define P0_30 30//P0.30

#define P0_31 31//P0.31

//

#define P1_00//P1.0

#define P1_11//P1.1

#define P1_22//P1.2

#define P1_33//P1.3

#define P1_44//P1.4

#define P1_55//P1.5

#define P1_66//P1.6

#define P1_77//P1.7

#define P1_88//P1.8

#define P1_99//P1.9

#define P1_10 10//P1.10

#define P1_11 11//P1.11

#define P1_12 12//P1.12

#define P1_13 13//P1.13

#define P1_14 14//P1.14

#define P1_15 15//P1.15

#define P1_16 16//P1.16

#define P1_17 17//P1.17

#define P1_18 18//P1.18

#define P1_19 19//P1.19

#define P1_20 20//P1.20

#define P1_21 21//P1.21

#define P1_22 22//P1.22

#define P1_23 23//P1.23

#define P1_24 24//P1.24

#define P1_25 25//P1.25

#define P1_26 26//P1.26

#define P1_27 27//P1.27

#define P1_28 28//P1.28

#define P1_29 29//P1.29

#define P1_30 30//P1.30

#define P1_31 31//P1.31

#define EXTMODE0 0//EXTMODE.0

#define EXTMODE1 1//EXTMODE.1

#define EXTMODE2 2//EXTMODE.2

#define EXTMODE3 3//EXTMODE.3

#define EINT0 0//EXTINT.0

#define EINT1 1//EXTINT.1

#define EINT2 2//EXTINT.2

#define EINT3 3//EXTINT.3

//

#define P0_0_GPIO0

#define P0_0_TXD01

#define P0_0_PWM12

#define P0_0_PINSEL 2 * P0_0

#define P0_1_GPIO 0

#define P0_1_RXD01

#define P0_1_PWM12

#define P0_1_EINT0 3

#define P0_1_PINSEL 2 * P0_1

#define P0_2_GPIO0

#define P0_2_SCL01

#define P0_2_PINSEL 2 * P0_2

#define P0_3_GPIO0

#define P0_3_SDA01

#define P0_3_EINT1 3

#define P0_3_PINSEL 2 * P0_3

#define P0_4_GPIO 0

#define P0_4_PINSEL 2 * P0_4

#define P0_5_GPIO 0

#define P0_5_PINSEL 2 * P0_5

#define P0_6_GPIO 0

#define P0_6_PINSEL 2 * P0_6

#define P0_7_GPIO 0

#define P0_7_PINSEL 2 * P0_7

#define P0_8_GPIO 0

#define P0_8_PINSEL 2 * P0_8

#define P0_9_GPIO 0

#define P0_9_PINSEL 2 * P0_9

#define P0_10_GPIO 0

#define P0_10_PINSEL 2 * P0_10

#define P0_11_GPIO 0

#define P0_11_PINSEL 2 * P0_11

#define P0_12_GPIO 0

#define P0_12_PINSEL 2 * P0_12

#define P0_13_GPIO 0

#define P0_13_PINSEL 2 * P0_13

#define P0_14_GPIO 0

#define P0_14_CD1//LPC2138

#define P0_14_EINT1 2

#define P0_14_SDA13

#define P0_14_PINSEL 2 * P0_14

#define P0_15_GPIO 0

#define P0_15_RI1//LPC2138

#define P0_15_EINT2 2

#define P0_15_PINSEL 2 * P0_15

#define P0_16_GPIO 0

#define P0_16_EINT0 1

#define P0_16_PINSEL 2 * P0_0

#define P0_17_GPIO 0

#define P0_17_PINSEL 2 * P0_1

#define P0_18_GPIO 0

#define P0_18_PINSEL 2 * P0_2

#define P0_19_GPIO 0

#define P0_19_PINSEL 2 * P0_3

#define P0_20_GPIO 0

#define P0_20_PINSEL 2 * P0_4

#define P0_21_GPIO 0

#define P0_21_PINSEL 2 * P0_5

#define P0_22_GPIO 0

#define P0_22_PINSEL 2 * P0_6

#define P0_23_GPIO 0

#define P0_23_PINSEL 2 * P0_7

#define P0_24_GPIO 0

#define P0_24_PINSEL 2 * P0_8

#define P0_25_GPIO 0

#define P0_25_PINSEL 2 * P0_9

#define P0_26_GPIO 0

#define P0_26_PINSEL 2 * P0_10

#define P0_27_GPIO 0

#define P0_27_PINSEL 2 * P0_11

#define P0_28_GPIO 0

#define P0_28_PINSEL 2 * P0_12

#define P0_29_GPIO 0

#define P0_29_PINSEL 2 * P0_13

#define P0_30_GPIO 0

#define P0_30_PINSEL 2 * P0_14

#define P0_31_GPIO 0

#define P0_31_PINSEL 2 * P0_15

#endif// __LPC21xxDEF_H