main.c

万龙开发板的原理图和pcb图

/****************************************************************************
 file name: main.c
****************************************************************************/

//***************************************************************************
//#include <stdio.h>
//#include <stdarg.h>
#include "option.h"
#include "44b.h"
#include "def.h"
#include "44blib.h"

#include "debug.h"
#include "drivers.h"
#include "ide_include.h"
#include "fat_include.h"


volatile char which_int=0;




void ShowFATDetails(void)
{
	  	s3c44b0x_Printf("\r\nCurrent Disc FAT details\r\n------------------------\r\nRoot Dir First Cluster = ");   
	  	s3c44b0x_Printf("0x%x",FAT32.RootDir_First_Cluster);
	  	s3c44b0x_Printf("\r\nFAT Begin LBA = ");
	  	s3c44b0x_Printf("0x%x",FAT32.fat_begin_lba);
	  	s3c44b0x_Printf("\r\nCluster Begin LBA = ");
	  	s3c44b0x_Printf("0x%x",FAT32.cluster_begin_lba);
	  	s3c44b0x_Printf("\r\nSectors Per Cluster = ");
	  	s3c44b0x_Printf("%d",FAT32.SectorsPerCluster);
	  	s3c44b0x_Printf("\r\n\r\nFormula for conversion from Cluster num to LBA is;");
	  	s3c44b0x_Printf("\r\nLBA = (cluster_begin_lba + ((Cluster_Number-2)*SectorsPerCluster)))\r\n");
	  	s3c44b0x_Printf("\r\nMax LBA address on this drive is 0x%lx",IDE_Internal.maxLBA-1);
}



//-----------------------------------------------------------------------------
// Read an MP3 from the disc taking startcluster as start point
//-----------------------------------------------------------------------------

void MP3_Read(UI32 StartCluster)
{
	// Vars Used
	UI8 SectLast = 0;
	UI32 CurrentSec = 0;
	int i = 0;
	int firstuse=1;

	s3c44b0x_Printf("\r\nThe Content of the file is:");

	do 
		{
		SectLast = FATBuffer_SectorReaderBUFFERED(StartCluster, CurrentSec++,firstuse);
		firstuse = 0;
			if (!SectLast) // Dont play the last clustor !
				{
				for(i=0; i <= 511; i++)
	    				{

							s3c44b0x_putchar( IDE_SectorByte(i) ); // Retrieve byte from sector buffer
						} // End of for
				} // end of if
		} // end of while
		while (!SectLast); // Follow Clusters
	s3c44b0x_Printf("\r\nEnd of File");
}



/****************************************************************************
【功能说明】系统主函数
****************************************************************************/
void Main(void)
{

  int i;

	rSYSCFG=SYSCFG_8KB;		//使用8K字节的指令缓存
	rNCACHBE0=(((unsigned int)(Non_Cache_End>>12))<<16)|(Non_Cache_Start>>12); 
    //在上面的数据区域不使用高速缓存
	Port_Init();		//IO端口功能、方向设定
	ChangePllValue(56,2,1);		//修改系统主频为8倍频
	Uart_Init(0,115200);		//异步串行口初始化，设置波特率为115200
	Uart_Select(0);		//选择当前串口通道为COM0



		// Display Startup Message
	  	s3c44b0x_Printf("\r\nStarting Up 44b0x+IDE \r\n");
		s3c44b0x_Printf(    "          ---------上海勤研电子 \n\r");
		//calibrate time 
		s3c44b0x_Printf("Starting Calibrate Second timer...\r\n");	
		for(i=0;i<10;i++)
		{
		s3c44b0x_Printf(" %d second \r\n",i);
		delay_ms(1000);	
		}
		// IDE Hard Disc Master Initialisation
		s3c44b0x_Printf("\r\n<-----Hard Disc Initialisation Begin----->");

		IDE_Reset();	   	  // Reset IDE device 	
		IDE_InitDrive();	  // Send initialise commands to drive
		
		
 
	  // Load FAT Parameters
	FAT32_LoadFAT();

	
	  ShowFATDetails(); 

	  ListDirectory(0x02);
	  
#ifdef DEBUG_LV1_ON
	i = FAT32_fopenDIR("C:\\KERNEL\\MM");
	DEBUG_OUT("\r\n OPEN file....StartCluster is 0x%4x",i);
	ListDirectory(i);
#else
	ListDirectory(FAT32_fopenDIR("C:\\KERNEL\\MM"));
#endif
	MP3_Read(FAT32_fopen("C:\\KERNEL\\MM\\Makefile"));   

		s3c44b0x_SysHalt();	  

}
//***************************************************************************