#include "сдесь библиотека"

short unsigned int i;

void main (void)
{
  DDRA  = 255;-ошибка сдесь
  PORTA = 0;  и сдесь

  while(1)
  {
    if (PORTA == 255)
      PORTA = 0;
    else
      PORTA++;

    for (i=0; i<10000; i++)
    {
    }
  }
}

#include "ioat91sam7s256.h"


AT91S_PIO * pPIO = AT91C_BASE_PIOA;
#define OUT_MASK        (1UL<<29)

unsigned long tt = 0;
int main(void){
      AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_PIOA);
      pPIO->PIO_PER  = OUT_MASK;
      pPIO->PIO_OER  = OUT_MASK;
      pPIO->PIO_SODR = OUT_MASK;
      pPIO->PIO_CODR = (1UL<<29);

for(;;){
    if(tt < 10000000){tt++;}else {tt=0;}

    if(tt >5000000){pPIO->PIO_SODR =  (1<<29);} else{pPIO->PIO_CODR =  (1<<29);}
}



return 0;
}//end main

#include "ioat91sam7s256.h"



#define OUT_MASK        (1UL<<29)

unsigned long tt = 0;

int main(void)
{
      AT91S_PIO * pPIO = AT91C_BASE_PIOA;
      pPIO->PIO_PER   = OUT_MASK;
      pPIO->PIO_OER   = OUT_MASK;
      pPIO->PIO_CODR = OUT_MASK;
      while(1);
}

    #include "ioat91sam7s256.h"



#define OUT_MASK        (1UL<<8)

unsigned long tt = 0;

int main(void)
{
      AT91S_PIO * pPIO = AT91C_BASE_PIOA;
      pPIO->PIO_PER   = OUT_MASK;
      pPIO->PIO_OER   = OUT_MASK;
      pPIO->PIO_CODR = OUT_MASK;
      while(1);
}

#include <intrinsics.h>
#include "ioat91sam7s256.h"
#include "system.h"
#include "adc.h"

#define LONG 5000000
#define SHORT 1000000

//#define LONG 900000
//#define SHORT 100000
//MAIN POINTER
AT91PS_PIO m_pPio = AT91C_BASE_PIOA;
AT91PS_PMC m_pPMC = AT91C_BASE_PMC;
AT91PS_USART m_pUSART = AT91C_BASE_US0;
AT91PS_PDC m_pPDC = AT91C_BASE_PDC_US0;
AT91PS_MC m_pMC = AT91C_BASE_MC;
AT91PS_AIC m_pAic = AT91C_BASE_AIC;
AT91PS_SYS m_pSys = AT91C_BASE_SYS;
AT91PS_ADC m_pADC = AT91C_BASE_ADC;
AT91PS_RSTC m_pRSTC = AT91C_BASE_RSTC;

//it's a simple delay
void Delay (unsigned long a) { while (--a!=0); }


unsigned int i = 0;


int main()
{
__disable_interrupt();

// System init
//InitFrec();

// Init perifery
InitPeriphery();

//Enable RESET
m_pRSTC->RSTC_RCR = 0xA5000008;
m_pRSTC->RSTC_RMR = 0xA5000001;


//enable the clock of the PIO
m_pPMC->PMC_PCER = 1 << AT91C_ID_PIOA;
Delay(100000);

// Configure led
m_pPio->PIO_SODR = BIT8; // Set PA8 to HIGH -> led off
m_pPio->PIO_OER = BIT8; // Configure PA8 as output

while(1)
{
m_pPio->PIO_CODR = BIT8; // Set PA8 to LOW -> led on
Delay(80000);
m_pPio->PIO_SODR = BIT8; // Set PA8 to HIGH -> led off
Delay(80000);
}
}

//Enable RESET
  m_pRSTC->RSTC_RCR = 0xA5000008;
  m_pRSTC->RSTC_RMR = 0xA5000001;