IRQ.rar_2440 中断

#include "def.h" #include "option.h" #include "2440addr.h" #include "2440lib.h" #include "2440slib.h" #define GPGCON (*(volatile unsigned *)0x56000060) #define GPGDAT (*(volatile unsigned *)0x56000064) #define GPBCON (*(volatile unsigned *)0x56000010) #define GPBDAT (*(volatile unsigned *)0x56000014) #define SRCPND (*(volatile unsigned *)0x4a000000)//源挂起寄存器 //0 中断未被请求 1 中断源声明了中断请求 #define INTMOD (*(volatile unsigned *)0x4a000004)//中断模式寄存器 //0 外部中断 1 快速中断 #define INTMASK (*(volatile unsigned *)0x4a000008)//中断屏蔽寄存器 //0 可服务 1 屏蔽 #define INTPND (*(volatile unsigned *)0x4a000010)//中断挂起寄存器 //0 未请求 1 请求 #define EINTPEND (*(volatile unsigned *)0x560000a8)//外部中断挂起寄存器 //0 使能中断 1 禁止中断 #define EXTINT1 (*(volatile unsigned *)0x5600008c)//外部中断控制器 //配置信号触发方式，此处为上升沿触发（10x) #define EXTINT2 (*(volatile unsigned *)0x56000090) #define EINTMASK (*(volatile unsigned *)0x560000a4) //#define pISR_EINT0 (*(unsigned *)( //#define BIT_EINT0 (1) //#define BIT_EINT2 (1<<2) //#define BIT_EINT8_23 (1<<5) #define Enableirq(bit) INTMASK &= ~(bit) #define Disableirq(bit) INTMASK |=(bit) __inline void Clearpending(int bit) { register i; SRCPND =bit; INTPND =bit; i=INTPND; } U8 Key_scan(void) { Delay(80); if((GPGDAT & (1<<0))==0) { GPBDAT &=(0<<5); Delay(1000); GPBDAT |=(1<<5); return 1; } else if((GPGDAT & (1<<3))==0) { GPBDAT &=(0<<6); Delay(1000); GPBDAT |=(1<<6); return 2; } else if((GPGDAT & (1<<5))==0) { GPBDAT &=(0<<7); Delay(1000); GPBDAT |=(1<<7); return 3; } else if((GPGDAT & (1<<6))==0) { GPBDAT &=(0<<8); Delay(1000); GPBDAT |=(1<<8); return 4; } else if((GPGDAT & (1<<7))==0) return 5; else if((GPGDAT & (1<<11))==0) return 6; else return 0xff; } static void __irq Key_ISR(void) { U8 key; U32 r; EnterCritical(&r); if(INTPND==BIT_EINT8_23) { Clearpending(BIT_EINT8_23); if(EINTPEND & (1<<8))//写1清零此位 EINTPEND |=(1<<8); if(EINTPEND & (1<<11)) EINTPEND |=(1<<11); if(EINTPEND & (1<<13)) EINTPEND |=(1<<13); if(EINTPEND & (1<<14)) EINTPEND |=(1<<14); if(EINTPEND & (1<<15)) EINTPEND |=(1<<15); if(EINTPEND & (1<<19)) EINTPEND |=(1<<19); } key=Key_scan(); if(key==0xff) Uart_Printf("Interrupt occur... key is released!\n"); else Uart_Printf("Interrupt occur... key %d is pressed!\n",key); ExitCritical(&r); } void Main(void) { GPBCON|=(1<<10)|(1<<12)|(1<<14)|(1<<16); GPBDAT=GPBDAT |(1<<5)|(1<<6)|(1<<7)|(1<<8); GPGCON=GPGCON | (2<<0)|(2<<6)|(2<<10)|(2<<12)|(2<<14)|(2<<22); EXTINT1 &=~(7<<0); EXTINT1 |=(0<<0); EXTINT1 &=~(7<<12); EXTINT1 |=(0<<12); EXTINT1 &=~(7<<20); EXTINT1 &=~(7<<24); EXTINT1 &=~(7<<28); EXTINT2 &=~(0xf<<12); EINTPEND |=(1<<8)|(1<<11)|(1<<13)|(1<<14)|(1<<15)|(1<<19); EINTMASK &=(0<<8)&(0<<11)&(0<<13)&(0<<14)&(0<<15)&(0<<19); Clearpending(BIT_EINT0|BIT_EINT2|BIT_EINT8_23); pISR_EINT0=pISR_EINT2=pISR_EINT8_23=(U32)Key_ISR; INTMASK =0x0; //Enableirq(BIT_EINT0|BIT_EINT2|BIT_EINT8_23); while(1); Disableirq(BIT_EINT0|BIT_EINT2|BIT_EINT8_23); }