using System;
using System.Threading;
using Microsoft.SPOT.Hardware;

namespace MFTest
{
    /// <summary>四位數(shù)碼管</summary>
    class Led4
    {
        /// <summary>每個(gè)數(shù)字的段數(shù)，一個(gè)字節(jié)只用七位，表示數(shù)碼管七段順時(shí)針</summary>
        static readonly Byte[] LedDigitals = new Byte[] { 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71 };

        /// <summary>數(shù)碼管公共腳</summary>
        public Int32[] PublicPins = new Int32[] { 6, 8, 9, 12 };
        /// <summary>數(shù)碼管七段腳</summary>
        public Int32[] SevenPins = new Int32[] { 11, 7, 4, 2, 1, 10, 5, 3 };

        /// <summary>實(shí)際控制板針腳</summary>
        public Cpu.Pin[] LedPins;
        OutputPort[] ports;

        private Int32 _Value;
        /// <summary>要顯示的數(shù)字</summary>
        public Int32 Value { get { return _Value; } set { _Value = value; } }

        private Boolean _IsHex;
        /// <summary>進(jìn)制。只支持十進(jìn)制和十六進(jìn)制</summary>
        public Boolean IsHex { get { return _IsHex; } set { _IsHex = value; } }

        Thread th;
        public void Start()
        {
            if (LedPins == null || LedPins.Length < 1) throw new Exception("No Pins For Led4!");

            ports = new OutputPort[LedPins.Length];
            for (int i = 0; i < LedPins.Length; i++)
            {
                // i==2就是腳3，是DP
                ports[i] = new OutputPort(LedPins[i], i == 2 || Array.IndexOf(PublicPins, i + 1) >= 0);
            }
            for (int i = 0; i < LedPins.Length; i++)
            {
                ports[i].Write(false);
            }

            th = new Thread(dis);
            th.Start();
        }

        public void Stop()
        {
            if (th == null) return;

            th.Abort();
            th = null;
        }

        void dis()
        {
            if (IsHex)
                while (true) ShowNumber16(Value);
            else
                while (true) ShowNumber(Value);
        }

        void ShowNumber(Int32 n)
        {
            for (int i = 0; i < 4; i++)
            {
                // 如果現(xiàn)在要顯示的是0，并且不是第一個(gè)數(shù)字，那么應(yīng)該關(guān)閉顯示
                if (n == 0 && i > 0)
                {
                    ShowDigital(i, 0, false);
                }
                else
                {
                    // 這一次應(yīng)該顯示的數(shù)字
                    ShowDigital(i, n % 10, true);

                    n = n / 10;
                }
            }
        }

        void ShowNumber16(Int32 n)
        {
            for (int i = 0; i < 4; i++)
            {
                // 如果現(xiàn)在要顯示的是0，并且不是第一個(gè)數(shù)字，那么應(yīng)該關(guān)閉顯示
                if (n == 0 && i > 0)
                {
                    ShowDigital(i, 0, false);
                }
                else
                {
                    // 這一次應(yīng)該顯示的數(shù)字
                    ShowDigital(i, n & 0xF, true);

                    n = n >> 4;
                }
            }
        }

        void ShowDigital(Int32 index, Int32 n, Boolean show)
        {
            // 找到控制腳
            var pin = ports[PublicPins[index] - 1];
            // 如果不顯示，關(guān)閉后直接返回
            if (!show)
            {
                pin.Write(false);
                return;
            }

            // 輸出數(shù)字的七段表示
            var d = LedDigitals[n];
            for (int i = 0; i < 7; i++)
            {
                var p = ports[SevenPins[i] - 1];
                p.Write((d >> i & 0x1) == 0);
            }
            // 關(guān)閉小數(shù)點(diǎn)
            ports[SevenPins[7] - 1].Write(true);

            // 先輸出數(shù)字，再打開開關(guān)
            pin.Write(true);
            // 然后停留一會(huì)，形成一個(gè)視覺效果
            Thread.Sleep(5);
            // 最后關(guān)閉，為下一個(gè)顯示做準(zhǔn)備
            pin.Write(false);
        }
    }
}

// 探索者一號(hào)
// 跑馬燈針腳
var pins = new Cpu.Pin[] {
    Pins.PG1, Pins.PF15, Pins.PF13, Pins.PF11, Pins.PB1,
    Pins.PC5, Pins.PG0, Pins.PF14, Pins.PF12, Pins.PB2 };
var leds = new OutputPort[pins.Length];
for (int i = 0; i < pins.Length; i++)
{
    leds[i] = new OutputPort(pins[i], i % 2 == 0);
}
var led4 = new Led4();
// 數(shù)碼管針腳
led4.LedPins = new Cpu.Pin[] {
    Pins.PC0, Pins.PF9, Pins.PF7, Pins.PF5, Pins.PF3, Pins.PF1,
    Pins.PF2, Pins.PF4, Pins.PF6, Pins.PF8, Pins.PF10, Pins.PC1 };
led4.IsHex = true; // 按十六進(jìn)制顯示
led4.Start();
var k = 0;
for (int i = 0; i < 20000; i++)
{
    for (int j = 0; j < leds.Length; j++)
    {
        leds[j].Write(k == j);
    }
    if (k++ >= leds.Length) k = 0;
    led4.Value = i;

    Thread.Sleep(50);
}
led4.Stop();