microcontroller_backup5

// PIO enable register
#define PIOB_PER (volatile unsigned int *) 0xFFFFF400 // B - left LED
#define PIOC_PER (volatile unsigned int *) 0xFFFFF600 // C - right LED

// output disable register
#define PIOC_ODR (volatile unsigned int *) 0xFFFFF614 // for both buttons

// output data status register
#define PIOB_ODSR (volatile unsigned int *) 0xFFFFF438 // for left LED

// output enable register
#define PIOB_OER (volatile unsigned int *) 0xFFFFF410 // B - left LED
#define PIOC_OER (volatile unsigned int *) 0xFFFFF610 // C - right LED

// set/clear for PB
#define PIOB_SODR (volatile unsigned int *) 0xFFFFF430
#define PIOB_CODR (volatile unsigned int *) 0xFFFFF434

// set/clear for PC
#define PIOC_SODR (volatile unsigned int *) 0xFFFFF630
#define PIOC_CODR (volatile unsigned int *) 0xFFFFF634

// pull-up enabled/disabled
#define PIOC_PUER (volatile unsigned int *) 0xFFFFF664 // for buttons: BP1 and BP2
#define PIOC_PUDR (volatile unsigned int *) 0xFFFFF660 // for buttons: BP1 and BP2

// pull-up status
#define PIOC_PDSR (volatile unsigned int *) 0xFFFFF63C

// clock
#define PMC_PCER (volatile unsigned int *) 0xFFFFF63C

#define LEFT_BUTTON (1 << 5)
#define RIGHT_BUTTON (1 << 4)

#define LEFT_LED (1 << 8)
#define RIGHT_LED (1 << 29)

#define CLOCK (1 << 4)

void dbgu_print_ascii(const char *a) {}


void delay(int how_long) {
    volatile unsigned int counter = how_long;
    while(counter > 0)
        --counter;
}

void toggle() {
    if (!(*PIOB_ODSR & LEFT_LED)) {
        *PIOB_SODR = LEFT_LED;
    } else {
        *PIOB_CODR = LEFT_LED ;
    }
}

int isLeftButtonClicked() {
    if (!(*PIOC_PDSR & LEFT_BUTTON))
        return 1;
    return 0;
}

int isRightButtonClicked() {
    if (!(*PIOC_PDSR & RIGHT_BUTTON))
        return 1;
    return 0;
}

void setOutputLED1() {
    *PIOB_PER = LEFT_LED;
    *PIOB_OER = LEFT_LED;
    *PIOB_SODR = LEFT_LED; // turn off the LED1
}

void setOutputLED2() {
    *PIOC_PER = RIGHT_LED;
    *PIOC_OER = RIGHT_LED;
    *PIOB_SODR = RIGHT_LED; // turn off the LED2
}

void setInputBP1() {
    *PIOC_PER = LEFT_BUTTON;
    *PIOC_ODR = LEFT_BUTTON;
    *PIOC_PUER = LEFT_BUTTON;
    *PMC_PCER = CLOCK;
}

void setInputBP2() {
    *PIOC_PER = RIGHT_BUTTON;
    *PIOC_ODR = RIGHT_BUTTON;
    *PIOC_PUER = RIGHT_BUTTON;
    *PMC_PCER = CLOCK;
}

void configureIO() {
    setOutputLED1();
    setOutputLED2();
    setInputBP1();
    setInputBP2();
}

int main() {
    configureIO();

    int forCounter;

    while(1){
        toggle();
        for (forCounter = 0; forCounter < 100; ++forCounter) {
            if (isLeftButtonClicked()) {
                *PIOC_CODR = RIGHT_LED;
            } else if (isRightButtonClicked()) {
                *PIOC_SODR = RIGHT_LED;
            }
            delay(10000);
        }
    }
    return 0;
}