ARM菜鸟外部中断学习笔记.doc

ARM菜鸟外部中断学习笔记*- ARM菜鸟外部中断学习笔记HotP 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 / 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 (i14);/* 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P1.15void 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 loopLPC21XXDEF.H/*-文 件 名: LPC21XXDEF.H创 建 人: ARM菜鸟HotP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