/*
 * @name: test5.c
 * @author: msksbr
 * @date: 2025-05-25
 * @description: a test for homework7's homework tests
 * @version: 1.0f: fix the bug that charset is RL reversed
 * homework zh_CN: 基于点阵的 9 到 0 的倒计时秒表显示
 * homework EN: display a countdown timer on the led matrix from 9 to 0
 */

#include "homework7.h"

unsigned char code number_char[10][8] = {
    {0x0E, 0x1B, 0x1B, 0x1B, 0x1B, 0x1B, 0x0E, 0x00}, // 0
    {0x0C, 0x0F, 0x0C, 0x0C, 0x0C, 0x0C, 0x1F, 0x00}, // 1
    {0x0F, 0x1B, 0x18, 0x1C, 0x0E, 0x07, 0x1F, 0x00}, // 2
    {0x0F, 0x1B, 0x18, 0x1E, 0x18, 0x1B, 0x0F, 0x00}, // 3
    {0x0C, 0x0C, 0x0E, 0x0F, 0x1F, 0x0C, 0x0C, 0x00}, // 4
    {0x1F, 0x03, 0x0F, 0x18, 0x18, 0x1B, 0x0F, 0x00}, // 5
    {0x1E, 0x07, 0x0F, 0x1B, 0x1B, 0x1F, 0x0E, 0x00}, // 6
    {0x1F, 0x18, 0x1C, 0x0C, 0x0E, 0x06, 0x06, 0x00}, // 7
    {0x0E, 0x1B, 0x1F, 0x1F, 0x1B, 0x1B, 0x0E, 0x00}, // 8
    {0x0E, 0x1B, 0x1B, 0x1B, 0x1E, 0x1C, 0x0F, 0x00}  // 9
};

void test5()
{
    TMOD = 0x10;
    TH1  = 0xFC;
    TL1  = 0x18;
    TR1  = 1;
    ET1  = 1;
    EA   = 1;
    while (1);
}

void timer1_ISR() interrupt 3
{
    static unsigned char i           = 0;
    static unsigned int count        = 0;
    static unsigned char current_num = 9;

    TH1 = 0xFC;
    TL1 = 0x18;

    P2 = 0xFF;
    switch_138(i);
    P2 = ~number_char[current_num][i];

    if (++i >= 8) i = 0;

    if (++count >= 1000) {
        count = 0;
        if (current_num > 0) {
            current_num--;
        } else {
            current_num = 9;
        }
    }
}

void main()
{
    test5();
}