ethernut-Interrupts auf AT91SAM7X-EK mit gcc

#include "AT91SAM7X256.h"

#ifndef __ASSEMBLY__

extern void dbgu_print_ascii(const char *buffer);

extern void dbgu_print_hex8(unsigned long);

#endif

#define LED4    AT91C_PIO_PB18 

#define LED3    AT91C_PIO_PB19 

#define LED1    AT91C_PIO_PB21 

#define LED2    AT91C_PIO_PB20 

#define TRUE 1

#define FALSE 0 

typedef unsigned char BOOL;

typedef unsigned char BYTE;

#include <string.h>

#include <stdio.h>

#include <fcntl.h>

#include <io.h>

#include <dev/board.h>

#include <arch/arm.h>

#include <dev/irqreg.h>

#include <sys/timer.h>

#include <sys/version.h>

int counter;

//+********************************************************************

void ApiTimerIntr(void *arg)

{      

  AT91C_BASE_PIOB->PIO_CODR=LED3; 

  counter++;

}

//+********************************************************************

int InitApiTimer(void)

{

  int dummy;

  outr(TC1_CCR, TC_CLKDIS);

  outr(TC1_IDR, 0xFFFFFFFF);

  dummy = inr(TC1_SR);

  outr(TC1_CMR, TC_CLKS_MCK32 | TC_CPCTRG | TC_WAVE | TC_EEVT_XC0);

  outr(TC1_RC, 0x8FF);

  outr(TC1_CCR, TC_CLKEN);

  outr(TC1_IER, TC_CPCS);

  NutRegisterIrqHandler(&sig_TC1, ApiTimerIntr, 0);

  NutIrqSetPriority(&sig_TC1, 0);

  NutIrqEnable(&sig_TC1);

  outr(TC1_CCR, TC_SWTRG);

  return 0;

}

//+********************************************************************

int w_init(void){

  AT91C_BASE_PIOA->PIO_PER=AT91C_PIO_PA5;    

  AT91C_BASE_PIOA->PIO_PER=AT91C_PIO_PA6;    

  AT91C_BASE_PIOA->PIO_PER=AT91C_PIO_PA7;    

  AT91C_BASE_PIOB->PIO_PER=LED4;    

  AT91C_BASE_PIOB->PIO_OER=LED4;    

  AT91C_BASE_PIOB->PIO_SODR=LED4;   

  AT91C_BASE_PIOB->PIO_PER=LED3;    

  AT91C_BASE_PIOB->PIO_OER=LED3;    

  AT91C_BASE_PIOB->PIO_SODR=LED3;   

  AT91C_BASE_PIOB->PIO_PER=LED2;    

  AT91C_BASE_PIOB->PIO_OER=LED2;    

  AT91C_BASE_PIOB->PIO_SODR=LED2;   

  AT91C_BASE_PIOB->PIO_PER=LED1;    

  AT91C_BASE_PIOB->PIO_SODR=LED1;   

  AT91C_BASE_PIOB->PIO_OER=LED1;    

  return 0;

}

//+********************************************************************

int main(void)

{

  u_long baud = 115200;

  int last;

  NutRegisterDevice(&DEV_DEBUG, 0, 0);

  freopen(DEV_DEBUG_NAME, "w", stdout);

  _ioctl(_fileno(stdout), UART_SETSPEED, &baud);

  printf("\n\nNut/OS %s CPU running at %lu Hz\n", NutVersionString(), NutGetCpuClock());

  printf("System Timer running at %lu ticks/s\n", NutGetTickClock());

  printf("1 second needs %lu system ticks\n", NutTimerMillisToTicks(1000));

  w_init();

  InitApiTimer();

  AT91C_BASE_PIOB->PIO_CODR=LED1;

  for(;;) {

    NutIrqDisable(&sig_TC1);

    last=counter;

    counter = 0;

    NutIrqEnable(&sig_TC1);

    printf("%d counter ticks\n", last);

    AT91C_BASE_PIOB->PIO_SODR=LED1;  // blinkende led zum test (OK)

    NutSleep(1000); // Sleep 1 second.      

    AT91C_BASE_PIOB->PIO_CODR=LED1;  // blinkende led zum test (OK)

    NutSleep(1000); // Sleep 1 second.      

  }

}