embedded

#include <stdint.h>
#include <stdbool.h>

#define PIOB_CODR (volatile unsigned int *)0xFFFFF434//clean output data register//turn on
#define PIOB_PER (volatile unsigned int *)0xFFFFF400 //setting IO port in IO mode //Controller PIO Enable Register//write only
#define PIOB_OER (volatile unsigned int *)0xFFFFF410 //setting the direction of IO port //  Controller Output Enable Register// write only
#define PIOB_SODR (volatile unsigned int *)0xFFFFF430 //forcing the required state on port output // Controller Set Output Data Register//write only

#define PIOC_SODR (volatile unsigned int * const) 0xFFFFF630 //forcing the required state on port output
#define PIOC_PDSR (volatile unsigned int * const) 0xFFFFF63C //read input state/./PIO Controller Pin Data Status Register//read only
#define PIOC_PER (volatile unsigned int * const) 0xFFFFF600 //setting IO port in IO mode
#define PIOC_OER (volatile unsigned int * const) 0xFFFFF610 //setting the direction of IO port
#define PIOC_CODR (volatile unsigned int * const) 0xFFFFF634 //Controller Clear Output Data Register
#define PIOC_ODR (volatile unsigned int * const) 0xFFFFF614 //PIO Controller Output Disable Register
#define PIOC_PUER (volatile unsigned int * const) 0xFFFFF664 //PIO Pull Up Enable Register

#define PMC_PCER (volatile unsigned int * const) 0xFFFFFC10 //send clock state to peripherals devices

#define DELAY 1000

#define LED1 1 << 8
#define LED2 1 << 29

#define B1 1 << 5 //left  click
#define B2 1 << 4 // right click
#define PID4 1 << 4

void configureButtons(void)
{
    *PIOC_PER = B1| B2;
    *PIOC_ODR = B1 | B2 ;
    *PIOC_PUER = B1| B2 ;
}

void configureClock(void)
{
    *PMC_PCER = PID4;
}

void configureLEDs(void)
{
    *PIOB_PER = LED1;
    *PIOB_OER = LED1;
    *PIOC_PER = LED2;
    *PIOC_OER = LED2;
}


void delayMs (volatile unsigned int delay)
{
  volatile int time;
  for(time = 0; time < 80000*delay; time++);
}


void delayMsButton (volatile unsigned int  delay) //10hz fergency
{
  int leftTime = delay%100;
    delay/= 100;

  while(delay>0)
  {
    delayMs(100);
    checkButton();
    delay--;

  }
  delayMs(leftTime);

}

void checkButton(){

  if( buttonState(B1))
  {
    *PIOC_CODR = LED2;
  }
  if( buttonState(B2))
  {
    *PIOC_SODR = LED2;
  }
}

int buttonState(int state)
{
  return ((*PIOC_PDSR & state) == 0);
}



int main(void)
{
    configureLEDs();
    configureButtons();
   *PIOB_CODR = LED1;   // Turn on
   *PIOB_SODR = LED1; // Turn off

  while(1)
  {
     delayMsButton(DELAY);
    *PIOB_CODR = LED1;     // Turn on
     delayMsButton(DELAY);
    *PIOB_SODR = LED1; // Turn off
  }
  return 0;

}