#include "p30f6014.h"
#include "I2CTime.h"

void InitializeSys()
{
    SRbits.IPL = 6; // CPU中斷優(yōu)先級設(shè)為6
}

void InitializeKeyboard()
{
    TRISD = (TRISD | 0xff00); //將RD8-RD15配置為輸入,D0~D7		
    TRISD = (TRISD & 0xfff8); //RD0-RD2配置為輸出,作138譯碼
    PORTD = (PORTD & 0xfff8); //選中KEYA，針對S1~S8的按鍵
}

void ConfigI2CTime()
{
    I2CCONbits.I2CEN = 1; //啟動I2C模塊
    I2CBRG = 0x064;       //I2C波特率
}

void InitializeSPIOut()
{
    TRISF = TRISF&0xfebf; //RF6、RF8輸出
    TRISG = TRISG&0xfdff; //RG9輸出
    SPI1CON = 0x0379; // 字節(jié)通訊模式，CKP=1,CKE=1,FOSC/32,時鐘上升沿發(fā)送數(shù)據(jù)
    SPI1STATbits.SPIEN = 1; //SPI1EN=1
    IFS0bits.SPI1IF = 0; // 清除SPI1IF標(biāo)志 
}

void InitializeTMR1()
{
    TMR1 = 0; //定時器1計數(shù)寄存器TMR1＝0
    T1CON = 0x0020;	//關(guān)閉定時器，使用內(nèi)部時鐘，預(yù)分頻比為1:64
    PR1 = 0x3D09; //定時器Timer1周期寄存器PR1＝0xf424，0.5s初值
    IFS0bits.T1IF = 0; //清除TMR1的中斷標(biāo)志
    IPC0bits.T1IP = 7; //中斷優(yōu)先級為7
    IEC0bits.T1IE = 1; //使能中斷
}

void DealWithKeys()
{
    int i;
    if((PORTD&0xff00) == 0xfe00) //查詢是否S1鍵按下
    {
		for(i=0; i<100; i++); //延時消抖
     	if((PORTD&0xff00) == 0xfe00)
        {
            SetMode += 1; //改變當(dāng)前模式
            if(SetMode == 4)
                SetMode = 0;
        }
        while((PORTD&0xff00) == 0xfe00); //不對一次長按按鍵進(jìn)行多次計數(shù)		
	}
    if((PORTD&0xff00) == 0xfd00) //查詢是否S2鍵按下
    {
        for(i=0; i<100; i++); //延時消抖
        if((SetMode == 1)||(SetMode == 2)) //如果模式?jīng)]有改變，S2鍵按下無效
        {
            if((PORTD&0xfd00) == 0xfd00) 
            {
                SelfIncrFlag += 1;
            }
            while((PORTD&0xff00) == 0xfd00); //不對一次長按按鍵進(jìn)行多次計數(shù)
        }
    }
}

void ModifyMode()
{
    if(SetMode == 1)                   //修改小時數(shù)模式
    {
        T1CONbits.TON = 1;
        ModifyHour();
    }
    if(SetMode == 2)                   //修改分鐘數(shù)模式
    {
        T1CONbits.TON = 1;
        ModifyMinute();
    }
    if((SetMode == 0)||(SetMode == 3)) //其他模式
        T1CONbits.TON = 0;
}

void ModifyHour()
{
    if(SelfIncrFlag == 1)              //小時修改范圍0~23h
    {
        Time[1] += 1;
        if(Time[1] == 10)
        {
            Time[0] += 1;
            Time[1] = 0;
        }
        if((Time[0] == 2)&&(Time[1] == 4))            
            Time[0] = Time[1] = 0;    
        SelfIncrFlag = 0;
    }
}

void ModifyMinute()
{
    if(SelfIncrFlag == 1) //分鐘修改范圍0~59m
    {
        Time[4] += 1;
        if(Time[4] == 10)
        {
            Time[3] += 1;
            Time[4] = 0;
            if((Time[3] == 6)&&(Time[4] == 0))
                Time[3] = Time[4] = 0;
        }
        SelfIncrFlag = 0;
    }
}

void WriteData()
{ 
    int i;
    I2CCONbits.SEN = 1;           //發(fā)送啟動位
    while(I2CCONbits.SEN==1){}    //等待啟動操作完成
    I2CTRN = ControlByteW;           //發(fā)送控制字：寫準(zhǔn)備
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    I2CTRN = AddressH;  
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
	I2CTRN = AddressL;   
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    for (i=0;i<16;i++)
	{
		I2CTRN = DataReceived[i];
        while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    }
    I2CCONbits.PEN = 1;          //發(fā)送停止位
    while(I2CCONbits.PEN==1){}   //等待停止操作完成    
}

void ReadData()
{      
    int i;
    I2CCONbits.SEN = 1;            //發(fā)送啟動位                  
    while(I2CCONbits.SEN == 1){}   //等待啟動操作完成  
    I2CTRN = ControlByteW;           //發(fā)送控制字：寫準(zhǔn)備
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    I2CTRN = AddressH;  
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
	I2CTRN = AddressL;   
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    I2CCONbits.RSEN = 1;             //發(fā)送重啟動位
    while(I2CCONbits.RSEN==1){}      //等待重啟動操作完成
    I2CTRN = ControlByteR;           //發(fā)送控制字：讀準(zhǔn)備
    while(I2CSTATbits.TRSTAT==1){}   //等待發(fā)送完成
    for (i=0;i<16;i++)
	{ 
        I2CCONbits.RCEN = 1;         //接收數(shù)據(jù)使能   
        while(I2CSTATbits.RBF==0){}
        DataReceived[i] = I2CRCV;
        I2CCONbits.ACKDT = 0;
        if (i==15)
        	I2CCONbits.ACKDT = 1;	 //最后一字節(jié)則不發(fā)ACK 
        I2CCONbits.ACKEN = 1;   
        while(I2CCONbits.ACKEN==1){}
    }   
    I2CCONbits.PEN = 1;          //發(fā)送停止位
    while(I2CCONbits.PEN==1){}   //等待停止操作完成  
}

void FormatDataReceived()
{
    Time[0] = (DataReceived[3]>>4)&0x03;
    Time[1] = DataReceived[3]&0x0f; 
    Time[2] = 10;
    Time[3] = (DataReceived[2]>>4)&0x07;
    Time[4] = DataReceived[2]&0x0f;
    Time[5] = 10;
    Time[6] = (DataReceived[1]>>4)&0x07;
    Time[7] = DataReceived[1]&0x0f;
}

void FormatTime()
{
    //DataReceived[1] = (Time[6]<<4)|Time[7];
    DataReceived[2] = (Time[3]<<4)|Time[4];
    DataReceived[3] = ((Time[0]<<4)|Time[1])&0x7f;
}

void DisplayOnLED(unsigned int* TimeTemp)
{
    int i;
    PORTGbits.RG9 = 0; //為鎖存作準(zhǔn)備
    for(i=0; i<2; i++) // 顯示小時
    {
        SPI1BUF = Table1[TimeTemp[i]];
        while(SPI1STATbits.SPITBF == 1);
    }
    SPI1BUF = 0xbf; //顯示“-”
    while(SPI1STATbits.SPITBF == 1);
    for(i=3; i<5; i++) //顯示分鐘
    {
        SPI1BUF = Table1[TimeTemp[i]];
        while(SPI1STATbits.SPITBF == 1);
    }
    SPI1BUF = 0xbf; //顯示"-"
    while(SPI1STATbits.SPITBF == 1); 
    for(i=6; i<8; i++) //顯示秒
    {
        SPI1BUF = Table1[TimeTemp[i]];
        while(SPI1STATbits.SPITBF == 1);
    }
    SPI1BUF = 0xff;
    while(SPI1STATbits.SPITBF == 1); 
    PORTGbits.RG9 = 1; //給鎖存信號
}

void __attribute__((__interrupt__))_T1Interrupt(void)
{    
    unsigned char i;
    for(i=0; i<8; i++)
    TimeFlicker[i] = Time[i];

    TMR1INTFlag = ~TMR1INTFlag; // 區(qū)別相鄰的兩次中斷，為了在修改時鐘時產(chǎn)生閃爍效果
    TMR1 = 0;							
	IFS0bits.T1IF = 0; // 清定時器中斷標(biāo)志 
    if(SetMode == 1) // 修改當(dāng)前小時數(shù)
    {
        TimeFlicker[0] = 10;
        TimeFlicker[1] = 10;
    }
    if(SetMode == 2) // 修改當(dāng)前分鐘數(shù)
    {
        TimeFlicker[3] = 10;
        TimeFlicker[4] = 10;
    }
}

int main()
{
    int i;
    InitializeSys();
    ConfigI2CTime();
    InitializeKeyboard();
    InitializeSPIOut();
    InitializeTMR1();
    while(1)
    {
        if(SetMode == 0) // 時鐘顯示模式
        {
            ReadData();
            FormatDataReceived();
        }
        DealWithKeys();
        ModifyMode();
        if(SetMode == 3) // 修改當(dāng)前時鐘
        {
            FormatTime();
            WriteData();  
        }      
        if(TMR1INTFlag == 0) // 更改時間時產(chǎn)生閃爍效果
            DisplayOnLED(&Time[0]);
        else
            DisplayOnLED(&TimeFlicker[0]);
    }
}