isr.c

有关于USB的一些主机端驱动

#include "..\header\FPGA_peripherals.h"
#include "..\header\armperipherals.h"

 	extern unsigned short *fpga_intmask;
	extern unsigned short *fpga_intstat;
	extern unsigned short *fpga_intclear;
	unsigned char* ts_reg = (unsigned char*)0x08000204;
	unsigned short* testpulse = (unsigned short*)0x08000002;
	extern unsigned short GetPenPos (short *pX, short *pY);	
	 //extern unsigned short *fpga_intclear;
unsigned int gpio_count = 0;	 

void GPIORoutine(void) {
	struct GPIO_struct *pGPIO = (struct GPIO_struct*)GPIO_BASE_ADDRESS;

	unsigned short temp;
	unsigned char temp1;
	short x, y;
	gpio_count++;
	//if (!(count&1)) return;
	//*testpulse = 0;
	//*fpga_intclear = 0;
	pGPIO->interrupt_status_reg = 0xFFFF; // Clear the interrupt(s)
	*fpga_intmask &= (~(1<<4));
	temp = *fpga_intstat;
	*fpga_intstat = temp; // Clear the interrupt status
	temp = *fpga_intstat;
	//for(temp = 0; temp < 10; temp++)
	GetPenPos(&x,&y);
	printf("x: %d, y: %d\n", x, y);
	*fpga_intmask |= (1<<4);	
}

unsigned int timer3_count = 0;
void Timer3Routine(void) {

	timer3_count++;
//	if(count == 0x08000000)
//		printf("Timer3 IRQ occurred. %dth time.\n", ++count);
}

void IRQStackOverflow(void) {
	asm("loop: b loop");
}