#include <stdio.h>
#include "NUC100Series.h"
#include "MCU_init.h"
#include "SYS_init.h"

#define TIMER0_COUNT 5

int main(void)
{
    //System initialization start-------------------
    SYS_UnlockReg();

    CLK->PWRCON |= (1ul << 0);                          //12 MHz clock
    while(!(CLK->CLKSTATUS & (1ul << 0)));  //wait for clock

    CLK->CLKSEL0 &= ~(0x07ul << 0);                 //set HCLK source as 12MHz clock
    CLK->CLKDIV &= ~(0xFul);                                //reset prescale

    //GPIO initialization start --------------------
    PC->PMD &= ~(0x03ul << 24);
    PC->PMD |= (0x01ul << 24);                  //GPIOC.12: output push-pull the LED

    //Setup GPIOB9 with timer1
    SYS->GPB_MFP |= (0x1ul<<9);      //GPB[9] is 1
    SYS->ALT_MFP |= ~(0x1ul<<1);                //ALT_MFP[1] is 0

    //Timer 1 initialization start--------------
    CLK->CLKSEL1 &= ~(0x07ul << 12);
    CLK->CLKSEL1 |= (0x02ul << 12);     //select TMR1 to use HCLK
    CLK->APBCLK |= (0x01ul << 3);       //configure APBCLK for TMR1

    TIMER1->TCSR &= ~(0xFFul << 0);     //reset prescale
    TIMER1->TCSR |= 2;                              //TMR1 will use HCLK/3

    TIMER1->TCSR &= ~(0x3ul << 27);
    TIMER1->TCSR |= (3 << 27);
    TIMER1->TCSR |= (0x01ul << 26);     //reset Timer1 count
    TIMER1->TCSR |= (0x1ul << 24);      //enable timer counter mode (in order to use event counter)
    TIMER1->TCSR |= (0x01ul << 16);     //TDR to be updated continuously while timer counter is counting

    TIMER1->TEXCON |= (0x1ul<<0);           //1 = A rising edge of external count pin will be counted.
    TIMER1->TEXCON |= (0x01ul<<1);      //01 = a 0 to 1 transition on TEX will be detected
    TIMER1->TEXCON |= (0x01ul<<3);      //1 = The transition detected on TEX pin results in capture/reset of timer counter
    TIMER1->TEXCON &= ~(0x1ul<<4);      //1: reset, 0: capture
    //TIMER1->TEXCON |= (0x1ul<<7);     //Timer Counter Pin De-bounce Enable

    TIMER1->TCSR |= (1<<30);                    //start timer

    SYS_LockReg(); // Lock protected registers

    while(1){
        //while(!(TIMER1->TDR==5));                 //wait for interrupt generated when timer reaches TCMPR=5  //MAZEN LOOK AT THiS ILNE OF CODE
        PC->DOUT ^= (0x1ul<<12);                    //toggle GPIOC12
        TIMER1->TCSR |= (0x01ul << 26);     //reset Timer1 count
    }
}