#pragma config FOSC = INTIO67
#pragma config WDTEN = OFF, LVP = OFF
#pragma config MCLRE = ON, DEBUG = OFF

#include "p18f26k20.h"
#include "delays.h"
#include "stdlib.h"

#pragma udata
//make array for tetris shapes
unsigned char shapes[] = {0b11110000,0b01110100,0b01110001,0b01110010,0b00110110,0b01100011,0b00110011};
//vars for various things
unsigned char r; //stores random number
unsigned char tstate; //timer activation status
unsigned int tvalue; //time left in timer
unsigned int tmax = 48000; //max amount of time in timer
unsigned int i; //for loops

#pragma code
void generatePiece();
void main (void)
{
    TRISB = 0b00000000;
    TRISA = 0b00000011;
    ANSEL = 0;
`   tstate = 0;
    tvalue = tmax;
    generatePiece();
    while (1)
    {
        LATAbits.LATA2 = tstate; //show timer state on LED
        Delay10TCYx(1);
        tvalue--;
        if(tvalue == 0) //if timer is done
        {
            tvalue = tmax; //reset timer
            if(tstate == 1) {generatePiece();} //display new piece
        }
        if(PORTAbits.RA0 == 1) //if "new piece" button is pressed
        {
            generatePiece(); //display new piece
            tvalue = tmax; //reset timer
            while(PORTAbits.RA0 == 1); //wait for button to be released
        }
        if(PORTAbits.RA1 == 1) //if "toggle timer" button is pressed
        {
            if(tstate == 1) {tstate = 0;} //toggle timer state
            else{tstate = 1;}
            tvalue = tmax; //reset timer
            while(PORTAbits.RA1 == 1); //wait for button to be released
        }
    }
}

void generatePiece()
{
    r = rand() % 7; //generate random number
    for(i = 1; i <= 2; i++) //blink display
    {
        LATB = 0; //blank display
        Delay1KTCYx(35);
        LATB = shapes[r]; //display shape on LEDs
        Delay1KTCYx(35);
    }
}