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*----------------------------------------------------------------------
ARM菜鸟外部中断学习笔记
HotPower@126.com 2005.7.21 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 <LPC21xx.H> // 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_Watchdog 0
#define VICIntSel_VicInt1 1
#define VICIntSel_VicInt2 2
#define VICIntSel_VicInt3 3
#define VICIntSel_Time0 4
#define VICIntSel_Time1 5
#define VICIntSel_UART0 6
#define VICIntSel_UART1 7
#define VICIntSel_PWM 8
#define VICIntSel_I2C0 9
#define VICIntSel_SPI0 10
#define VICIntSel_SSP 11
#define VICIntSel_PLLLock 12
#define VICIntSel_RTC 13
#define VICIntSel_EINT0 14
#define VICIntSel_EINT1 15
#define VICIntSel_EINT2 16
#define VICIntSel_EINT3 17
#define VICIntSel_ADC0 18
#define VICIntSel_I2C1 19
#define VICIntSel_BOD 20
#define VICIntSel_ADC1 21
#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_Enable 32 //
#define P0_0 0//P0.0
#define P0_1 1//P0.1
#define P0_2 2//P0.2
#define P0_3 3//P0.3
#define P0_4 4//P0.4
#define P0_5 5//P0.5
#define P0_6 6//P0.6
#define P0_7 7//P0.7
#define P0_8 8//P0.8
#define P0_9 9//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_0 0//P1.0
#define P1_1 1//P1.1
#define P1_2 2//P1.2
#define P1_3 3//P1.3
#define P1_4 4//P1.4
#define P1_5 5//P1.5
#define P1_6 6//P1.6
#define P1_7 7//P1.7
#define P1_8 8//P1.8
#define P1_9 9//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_GPIO 0
#define P0_0_TXD0 1
#define P0_0_PWM1 2
#define P0_0_PINSEL 2 * P0_0 #define P0_1_GPIO 0
#define P0_1_RXD0 1
#define P0_1_PWM1 2
#define P0_1_EINT0 3
#define P0_1_PINSEL 2 * P0_1 #define P0_2_GPIO 0
#define P0_2_SCL0 1
#define P0_2_PINSEL 2 * P0_2 #define P0_3_GPIO 0
#define P0_3_SDA0 1
#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_CD 1//LPC2138
#define P0_14_EINT1 2
#define P0_14_SDA1 3
#define P0_14_PINSEL 2 * P0_14 #define P0_15_GPIO 0
#define P0_15_RI 1//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
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