ARM7TDMI中断配置(IAR+LPC2148).rar

#include <iolpc2148.h> #include <inarm.h> void initLED(void); void IRQ_Eint0(void); void INT_init(void); #pragma vector = 0x18 __irq __arm void IRQ_ISR_Handler(void) { void (*interrupt_function)(); unsigned int vector; vector = VICVectAddr; interrupt_function = (void (*)())vector; (*interrupt_function)(); VICVectAddr = 0; } #pragma vector = 0x1c __fiq __arm void FIQ_ISR_Handler(void) { int i=0; EXTINT = 0x04; //清除中断标识 IO0SET |= 0x00000080;//驱动蜂鸣器 for(i=0;i<2000;i++); IO0CLR |= 0x00000080; } void IRQ_INT_init(void) { PINSEL1 = PINSEL1&0xFFFFFFFC|0x01;//设置p0.16(s5)为EINT0 VICIntSelect &= 0xffffbfff; //设置EINT0中断类型为IRQ(VIC通道号14) VICVectCntl0 = (0x20 | 14);//优先级为0，使能当前优先级的向量IRQ中断(0x20,即第6位置1) //分配给此优先级的中断源序号为14，即EINT0 VICVectAddr0 = (int)IRQ_Eint0;//对应优先级(0号)向量IRQ中断服务程序的入口地址 EXTINT = 0x01;//清除外部中断0的标志 VICIntEnable = (1 << 14);//使能外部中断0 } void FIQ_INT_init(void) { PINSEL0 = PINSEL0&0x3FFFFFFF|0x80000000;//设置p0.15(s4)为EINT2 VICIntSelect |= 0x00010000; //设置EINT2中断类型为FIQ(VIC通道号16) EXTINT = 0x04;//清除外部中断2的标志 VICIntEnable = (1 << 16);//使能外部中断2 } void LED_init() { IO1DIR |= 0x00ff0000; IO1SET = 0xffffffff; } void Beep_init(void) { PINSEL0 &=0xFFFF3FFF;//设置蜂鸣器和为GPIO口，p0.7 IO0DIR |=0x00000080; //设置蜂鸣器方向为输出 } void IRQ_Eint0(void) { int i=0; EXTINT = 0x01; //清除中断标识 IO1CLR = 0xffffffff; for(i=0;i<20000;i++); IO1SET = 0xffffffff; for(i=0;i<80000;i++); } int main() { LED_init(); Beep_init(); __disable_interrupt(); IRQ_INT_init(); FIQ_INT_init(); __enable_interrupt(); while(1); return 0; }