// homework4.h
/*
 * this header file defines defines:
 *  the BUS pin numbers for the LEDs, 7SEGs, and 38 transistors.
 *  the type for the 38 transistor array.
 */

#include <REG52.H>

// variables:
// pin addresses for the 38 transistor
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
// BUS pin addresses for the LEDs and 7SEGs:
sbit BUS1A  = P2 ^ 0;
sbit BUS2B  = P2 ^ 1;
sbit BUS3C  = P2 ^ 2;
sbit BUS4D  = P2 ^ 3;
sbit BUS5E  = P2 ^ 4;
sbit BUS6F  = P2 ^ 5;
sbit BUS7G  = P2 ^ 6;
sbit BUS8DP = P2 ^ 7;

// functions:
// 38 transistor type setters:
void set_38_2LED()
{
    // e.g. set Y3 to 1, others to 0:
    ADDR0 = 1;
    ADDR1 = 1;
    ADDR2 = 0;
    ADDR3 = 1;
    ENLED = 0;
}
void set_38_2SEG()
{
    // e.g. set Y4 to 1, others to 0:
    ADDR0 = 0;
    ADDR1 = 0;
    ADDR2 = 1;
    ADDR3 = 1;
    ENLED = 0;
}

// 7SEG number display function:
// 0-9
void show_number(unsigned char number)
{
    switch (number) {
        case 0: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 0;
            BUS6F  = 0;
            BUS7G  = 1;
            BUS8DP = 1;
            break;
        }
        case 1: {
            BUS1A  = 1;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 1;
            BUS5E  = 1;
            BUS6F  = 1;
            BUS7G  = 1;
            BUS8DP = 1;
            break;
        }
        case 2: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 1;
            BUS4D  = 0;
            BUS5E  = 0;
            BUS6F  = 1;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 3: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 1;
            BUS6F  = 1;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 4: {
            BUS1A  = 1;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 1;
            BUS5E  = 1;
            BUS6F  = 0;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 5: {
            BUS1A  = 0;
            BUS2B  = 1;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 1;
            BUS6F  = 0;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 6: {
            BUS1A  = 0;
            BUS2B  = 1;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 0;
            BUS6F  = 0;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 7: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 1;
            BUS5E  = 1;
            BUS6F  = 1;
            BUS7G  = 1;
            BUS8DP = 1;
            break;
        }
        case 8: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 0;
            BUS6F  = 0;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        case 9: {
            BUS1A  = 0;
            BUS2B  = 0;
            BUS3C  = 0;
            BUS4D  = 0;
            BUS5E  = 1;
            BUS6F  = 0;
            BUS7G  = 0;
            BUS8DP = 1;
            break;
        }
        default: {
            break;
        }
    }
}