//==========================================================================
//文件名稱:Readbook.c
//功能:朗讀語音
//參數:無
//返回值:無
//日期:2005.04.07
//===========================================================================
#include "hardware.h"

#include	"A2000.h"
#define		SPEECH_1		0
#define		DAC1			1
#define		DAC2			2
#define		Ramp_UpDn_Off	0
#define		Ramp_UpDn_On	3
#define		Manual			0
#define		Auto			1
#define		Full			1
#define		Empty			2
#define		Mode			1

#define ROOT_ADDR	196608
#define P_Watchdog_Clear	(unsigned int *)Port_Watchdog_Clear
#define P_SystemClock		(unsigned int *)Port_SystemClock

unsigned int i;
unsigned int Page;   
unsigned int Block;
unsigned int Column;
unsigned int Ret;
long int Addr;
long int Addr_end;

extern int KeyValue;
extern int pno,bno;

unsigned long Flash_ReadDWord(long Addr);	
unsigned SearchSnd(unsigned uiBookIdx ,unsigned uiPageIdx,long *Text_StartAddr,long *Text_EndAddr,long *Voice_StartAddr,long *Voice_EndAddr);
//=====================================================================================
//函數名稱：Readbook()
//功能：朗讀當前也的內容
//日期：2005.04.06
//=====================================================================================
Readbook()
{
	unsigned int Addr_flash;
    long Text_StartAddr,Text_EndAddr,Voice_StartAddr,Voice_EndAddr;	
    unsigned int data;
    
	//-----------------------------------------------------------------------
	//初始化
	//-----------------------------------------------------------------------
	System_Initial();	
	InitSignalLine();  
	SP_InitSamsungFlash();
	//-----------------------------------------------------------------------	
	
	SearchSnd(bno,pno,&Text_StartAddr,&Text_EndAddr,&Voice_StartAddr,&Voice_EndAddr);
	
 	KeyValue==0;
 	Addr = Voice_StartAddr - 2;
    Addr_end = Voice_EndAddr - 2;
    
    Block = (unsigned int)(Addr>>14);			                 //
	Page = (unsigned int)((Addr&0x3fff)>>9);	                 //
	Column = (unsigned int)(Addr&0x1ff);		                 //根據地址計算出塊頁和當前頁內地址

	SP_InitReadSamsungFlash_1(Column,Page,Block);
	SACM_A2000_Initial(0);						                 //非自動方式播放的初始化
    SACM_A2000_InitDecoder(DAC1);				                 //開始對A2000的語音數據以非自動方式解碼
 	while(SACM_A2000_TestQueue()!=Full)			                 //測試并獲取語音隊列的狀態
    {
   	    Ret = Flash_ReadWord(Addr); 	                         //從flash讀出數據
        SACM_A2000_FillQueue(Ret);				                 //獲取語音編碼數據并填入語音隊列等候解碼
        Addr += 2;
        if((Addr&0x3fff)==0)
         {
           Block++;
           Page = 0;
           Column = 0;
           SP_InitReadSamsungFlash_1(Column,Page,Block);          //當一塊讀完時，換塊讀取資源
         }
	}
    while(1)
	{
	  if(SACM_A2000_TestQueue()!=Full)
	  {
		Ret = Flash_ReadWord(Addr); 
	    SACM_A2000_FillQueue(Ret);
	    Addr += 2;
	    if((Addr&0x3fff)==0)
         {
          Block++;
          Page = 0;
          Column = 0;
          SP_StopReadSamsungFlash();
          SP_InitReadSamsungFlash_1(Column,Page,Block);
         }
      }
      if(KeyValue!=0&&KeyValue!=0x1000)                              //是否有鍵值按下   
       {
         SACM_A2000_Stop();						                     //是，打斷停止播放
    	 break;
      }

      if(Addr< Addr_end)                                             //如果該段語音未播完，即未到達末地址時
      {
        SACM_A2000_Decoder();					                         //獲取資源并進行解碼，再通過中斷服務子程序送入DAC通道播放
      }
      else
      {
        SACM_A2000_Stop();						                     //否則，停止播放
      }
      Clear_Watch_Dog();                                             //清看門狗
	}  
	for(i=0;i<0x0fff;i++)
	{
	 *P_Watchdog_Clear = 0x0001;
	}
}