#include <string.h>
#include "..\inc\option.h"
#include "..\inc\def.h"
#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\am29f800.h"


int DownloadData(void);


U32 downloadAddress;
U32 downloadProgramSize;

void *flashType[][2]=
{
    (void *)ProgramAM29F800,     "AM29LV800BB         ",
    0,0
};




void ProgramFlash(void)
{
    int i=0;

    Uart_Printf("\n*** NOR Flash Memory writer ver 0.3 ***\n\n");

    downloadAddress=(unsigned)malloc(0x400000);
    if(downloadAddress==0)return;

    rNCACHBE0=( (0x2000000>>12)<<16 )|(0>>12); //flash area must be non-cachable area.

    rSYSCFG=rSYSCFG&(~0x8); //write buffer has to be off for proper timing.    

    while(1)
    {   //display menu
        Uart_Printf("%c: %s",'a'+i,flashType[i][1]);
        i++;
        if((int)(flashType[i][0])==0){Uart_Printf("\n");break;}
        if((i%4)==0)Uart_Printf("\n");
    }

    Uart_Printf("Select the type of a flash memory? ");
    i=Uart_Getch()-'a';
    Uart_Printf("\n");

    if( i<0 || (i>=(sizeof(flashType)/8)) )
	return;

    if(!DownloadData())return;
   
    ( (void (*)(void))(flashType[i][0]) )();

    free((void *)downloadAddress);

    rNCACHBE0=0x0;
}




int DownloadData(void)
{
    int i,tmp;
    U16 checkSum=0,dnCS;
    U32 fileSize=10;
    U8 *downPt;

    downPt=(U8 *)downloadAddress;
   
    Uart_Printf("downloadAddress=%x\n",downloadAddress);

    Uart_Printf("Download the plain binary file(.BHC) to be written\n");
    Uart_Printf(".BHC file format: <n+6>(4)+(n)+CS(2)\n");
    Uart_Printf("To transmit .BHC file    : wkocm2 xxx.BHC /1 /g /d:1\n");
    Uart_Printf("Or, to transmit .BIN file: wkocm2 xxx.BIN /1 /d:1\n");
    Uart_Printf("Download methods: COM:8Bit,NP,1STOP\n");
 
    Uart_Printf("\nSTATUS:");
    rINTMSK=~BIT_GLOBAL;
    
    tmp=RdURXH0(); //To remove overrun error state.

    i=0;	
    while(i<fileSize)
    {
	while(!(rUTRSTAT0&0x1));
	*(downPt+i)=RdURXH0();
	if(i==3)
	{
	    fileSize=*((U8 *)(downloadAddress+0))+
		(*((U8 *)(downloadAddress+1))<<8)+
		(*((U8 *)(downloadAddress+2))<<16)+
		(*((U8 *)(downloadAddress+3))<<24);
	}
	
	if((i%1000)==0)WrUTXH0('#');
	i++;
    }

    downloadProgramSize=fileSize-6;

    for(i=4;i<(fileSize-2);i++)
    {
        checkSum+=*((U8 *)(i+downloadAddress));
    }

    dnCS=*((U8 *)(downloadAddress+fileSize-2))+
          (*( (U8 *)(downloadAddress+fileSize-1) )<<8);

    if(checkSum!=dnCS)
    {
        Uart_Printf("Checksum Error!!! MEM:%x DN:%x\n",checkSum,dnCS);
	return 0;
    }

    Uart_Printf("\nDownload O.K.\n");
    return 1;
}