main.c

44box的bootloader原代码及其分析。

#include <string.h>
#include ".\Target\option.h"
#include ".\Target\def.h"
#include ".\Target\44b.h"
#include ".\Target\44blib.h"
#include ".\usb\usbdrv.h"
#include ".\usb\Usb_reg.h"
#include ".\fat16\fat16.h"
#include ".\flashtest\flash.h"
//////////////////board test/////////////////////
#include ".\armsystest\Nandflash.h"
#include ".\armsystest\rtc.h"
#include ".\armsystest\keyboard.h"
#include ".\armsystest\eint.h"
#include ".\armsystest\iic.h"
#include ".\armsystest\adc.h"
#include ".\armsystest\lcd.h"
#include ".\armsystest\touch.h"
#include ".\armsystest\timer.h"
#include ".\armsystest\uart.h"
//#include ".\tcpipsrc\ping.h"
extern void Ping_test(void);


#include <stdio.h>

void __irq MEint4567Isr(void);

void (*runinram)(void)=(void (*)(void))RAM_ADDRESS;
extern byte USBN9604_init(void);
volatile byte code_loaded=0;
volatile byte flash_exist=1;
volatile byte filesys_exist=0;
volatile char exeLoadedcode=0;
volatile char Mwhich_int=0;
volatile byte save_file=0;
INT32U ram_addr=RAM_ADDRESS;
INT32U src_addr,des_addr,length;
int Uart_Getaddress(char *str,  INT32U *address);
//////////////test function///////////////////////
void * function[][2]=
{
	(void *)Read_ID,	      "Nandflash-Read ID",
	(void *)Test_Iic,	  	  "IIC(24LCxx)-Test ",
	(void *)Display_Rtc,	  "RTC-Display      ",
	(void *)Keyboard_test,  "Keyboard-Test    ",
	(void *)Test_Eint,		  "Ext.Int-Test     ",
	(void *)Test_Adc,		    "ADC-Test         ",
	(void *)Test_TimerInt,  "Timer.Int-Test   ",
	(void *)Test_LCD,		    "LCD-Test         ",
	(void *)Test_Touch,		  "TouchScreen-Test ",
	(void *)Ping_test,	    "Ping diagnose tool",
	//(void *)Test_Uart0,     "UART0-Test       ",
	0,0
};



int Main(void)
{
	int handle,i=0,j=0,time,breakflag;
        char aa=0;
	char *buff,argv[256];
	char addrbuf[4];
	unsigned short nandflashid;
	
	rSYSCFG=CACHECFG;// Using 8KB Cache//
	Port_Init();
	Uart_Init(0,115200);
	
	Beep(0x01);
	Led_Display(0xf);
	Delay(0);
	
	Uart_Select(0); //Select UART0//
	Uart_Printf("\n---------------------------------------------------------------");

	Beep(0x00);
	Uart_Printf("\nOEM name   :     HangZhou LiYuTai elec. www.hzlitai.com.cn      ");
	Uart_Printf("\nFunction   :     ARMSys's BootLoader for Linux                  ");
	Uart_Printf("\nEmail      :     [e-mail]                         ");
	Uart_Printf("\nUART comfig:     115.2kbps,8Bit,NP,UART0                       ");
	Uart_Printf("\nusing USB  :     Yes                                            ");

	
	nandflashid=Check_Flash_Id();
	if(nandflashid==0xec73)
	    Uart_Printf("\nNand-flash :     K9F2808                                       ");
	else if(nandflashid==0xec75)
	    Uart_Printf("\nNand-flash :     K9F5608                                       ");
	else
	{ 
	    Uart_Printf("\nNand-flash :     None                                    ");
	    flash_exist=0;
	}
	    
	Led_Display(0x0);

	Uart_Printf("\nInitializing system... ...");
	
	if(flash_exist)
	{
	    if(fatInit()==0)//如果文件系统存在，就可以通过exint4~6键启动保存的程序,或通过exint7键设置保存file模式
	    {
	     /* Uart_Printf("\n---------------------------------------------------------------");
	        Uart_Printf("\n按下EXINTx键自动进入对应功能:     ");
	        Uart_Printf("\nEXINT4:");
	        Uart_Printf("\nEXINT5:载入uClinux运行.");
	        Uart_Printf("\nEXINT6:载入保存在Nandflash中的程序并运行(仅用于从0xc000000运行).");
	        Uart_Printf("\nEXINT7:准备好将从USB口下载的程序保存到Nandflash。\n等待按键");
	     */
	        filesys_exist=1;
	    
	    	  rINTCON=0x1;//disable fiq, enable irq
	        pISR_EINT4567=(int)MEint4567Isr;
	
	        rPCONG|=0xff00;	//EINT7~0
	        rPUPG=0x0;		//pull up enable	  
	        rEXTINT=0x22222222; //Falling edge mode 
	        rINTMSK&=~(BIT_GLOBAL|BIT_EINT4567); 
	
	        while((i<10)&&(exeLoadedcode==0))
	        {
	          	Delay(1500); 
	        	  Uart_Printf(" ...");
	            i++;
	         }
	        if(exeLoadedcode)
		      {
	    	       switch(Mwhich_int)
               {
	              case 1:
	              case 3:
	              case 5:
	              case 7:
	                  break;
	              case 2:
	                  Uart_Printf("\nStart uClinux...\n");
		                ram_addr=0x10000;
		                ((void (*)(void))ram_addr)();
	                  break;
	              case 4:
                    Uart_Printf("EXINT5/EXINT6 is Pressed!  ");
		                handle=fat_open("\\code\\44bapp.bin");
			  						if((handle==(-1))||(handle==(-2)))
										{
				              Uart_Printf("\nOpen 44bapp.bin failed!");
			                //return -1;
			              }
										else
										{
											buff=(char *)RAM_ADDRESS;
											fat_read(handle, buff, 0x5f0000);
											fat_close(handle);
											Uart_Printf("\nCompleted download, turn to execute the code!\n");
											Delay(1000);  //it should be delay a long time for pc software stable
											runinram();
										}
										break;
		      			case 8:
		       				 	save_file=1;
		        				break;
			   				}//switch
		      }//if(exe...)
		  }//if(fatinit...)
   }//if(flash_...)
//==================================================================================================      
  while(1)
  {
  	breakflag=0;
  	code_loaded=0;
		Uart_Printf("\n---------------------------------------------------------------");
		Uart_Printf("\n1.Use USB-downloader download code to SDRAM.");
		Uart_Printf("\n2.Use USB-downloader download code to SDRAM & Nandflash.");
		Uart_Printf("\n3.Use USB-downloader burn flashROM.");
		Uart_Printf("\n4.Copy code from flashROM to SDRAM.");
		Uart_Printf("\n5.Run at specify address.");
		Uart_Printf("\n6.Run code in Nandflash.");
		Uart_Printf("\n7.Start uClinux.");
		Uart_Printf("\n8.Format Nandflash.");
		Uart_Printf("\n9.Test hardware");
	aa = Uart_Getch();
	switch(aa)
	{
		case '2':
		    if(filesys_exist==1)
		      save_file=1;
		    else
		    {
		      Uart_Printf("\nError: Nandflash has not been formatted!");
		      break;
		    }
		case '1':
			Uart_Printf("\nInput the address to put the code (Default address is 0xc008000):");
		       while(Uart_Getaddress(argv,&ram_addr));					   	
				
			if(USBN9604_init())
		  {
		        Uart_Printf("\nReset the USB controller failed, active USB interface failed.");
				return 1;
			}
			else
			{
				Uart_Printf("\nUSB Interface is active!\nYou can use USBdownload.exe to download *.bin file!");
			}
		       rINTCON=0x5;//fiq disable
			while (!code_loaded);
			Uart_Printf("\nCompleted Download!");
		    break;
		case '3':
		    Uart_Printf("\n\nPlease refer 3 step below and use function 1&5 to program flash：");
		    Uart_Printf("\nStep1: Download *.bin (the binary code you want to burn to flash) to address 0x0c200000.");
		    Uart_Printf("\nStep2: Download flashpgm.bin to 0x0c008000.");
		    Uart_Printf("\nStep3: Run at address 0x0c008000.\n");
		    break;
		case '4':
		    Uart_Printf("\nInput source address：");
		    while(Uart_Getaddress(argv,&src_addr));
		    Uart_Printf("\nInput destination address:");
		    while(Uart_Getaddress(argv,&des_addr));
		    Uart_Printf("\nInput the length (BYTE)：");
		    while(Uart_Getaddress(argv,&length));
		    Uart_Printf("\nDo you confirm to copy? (Y/N)");
		    aa = Uart_Getch();
		    if((aa=='Y')||(aa=='y'))
		    {
		        Uart_Printf("\nBegin copy ...");
		        j=1;
		        for(i=0;i<length;i++)
		           *(unsigned char *)des_addr++ = *(unsigned char *)src_addr++;
		        if((i%0x100)==0)
		        {
		           Led_Display(j);
		           j<<1;
		           if(j==0x10)
		           j=1;
		        }
		        Uart_Printf("\nComplete copy.");
		   }
		         
		    break;
	  case '5':
		    Uart_Printf("\nInput the address (Default address is 0xc008000):");
		    ram_addr=RAM_ADDRESS;
		    while(Uart_Getaddress(argv,&ram_addr));								   	
		    
		    Uart_Printf("\nPlese wait a moment to start running...");
		    /*对USBN9603进行一次软件复位*/
		    write_usb(MCNTRL, SRST);
		    Delay(1000);//it should be delay a long time for pc software stable
		    ((void (*)(void))ram_addr)();
		    break;
		case '6':
	       write_usb(MCNTRL, SRST);
         Delay(1000);//it should be delay a long time for pc software stable
		     if((flash_exist==1) && (filesys_exist==1))
		     {
						handle=fat_open("\\code\\44bapp.bin");
						if((handle==(-1))||(handle==(-2)))
						{
						    Uart_Printf("\nOpen 44bapp.bin file faild!");
						    //return -1;
						}
						else
						{
	              Uart_Printf("\nInput the running address (Default address is 0xc008000):");
								ram_addr=RAM_ADDRESS;
								while(Uart_Getaddress(argv,&ram_addr));								   	
					
								buff=(char *)ram_addr;//RAM_ADDRESS;
								i=fat_read(handle, buff, 0x5f0000);
								i=fat_close(handle);
					
								Uart_Printf("\nComplete download, turn to execute the code!\n");
								Delay(1000);//it should be delay a long time for pc software stable
								((void (*)(void))ram_addr)();////////runinram();
						}
		    }
		    break;
		 case '7':
		    Uart_Printf("\nLoad image.rom...\n");
		    src_addr=0x20000;
		    des_addr=0xc100000;
		    for(i=0;i<0xdffff;i++)
		           *(unsigned char *)des_addr++ = *(unsigned char *)src_addr++;
		    Uart_Printf("\nLoad romfs.img...\n");
		    src_addr=0x100000;
		    des_addr=0xc500000;
		    for(i=0;i<0xf0000;i++)
		           *(unsigned char *)des_addr++ = *(unsigned char *)src_addr++;
		    Uart_Printf("\nStart uClinux\n");
		    ram_addr=0xc100000;
		    ((void (*)(void))ram_addr)();
		 case '8':		
		    if(flash_exist)
		    {
	          Uart_Printf("\nThe content in Nandflash will be lost, confirm to format?(Y/N)");
	          aa= Uart_Getch();
	          if((aa=='Y')||(aa=='y'))
            {
               fat_format(NAND_FLASH_Drv,16,0x06);
               filesys_exist=1;
            }
	       }
         else
            Uart_Printf("\nCan't find Nandflash!");
 		   break;
 		case '9':
 			 //Uart_Printf("\nUSB接口失效。");
			 /*对USBN9603进行一次软件复位*/
			 write_usb(MCNTRL,SRST);	
			 Delay(1000);//it should be delay a long time for pc software stable
			 //Functions test
				while(1)
				{
			      i=0;
						Uart_Printf("\n\n");
						while(1)
						{   //display menu
							Uart_Printf("%2d:%s",i+1,function[i][1]);
							i++;
							if((int)(function[i][0])==0)
							{
								Uart_Printf("\n");
								break;
							}
							if((i%2)==0)
								Uart_Printf("\n");
						}
						Uart_Printf("\nSelect the function to test?(Press Reset button to restart)");
						i=Uart_GetIntNum();
						i--;
						Uart_Printf("\n");
						if(i>=0 && (i<(sizeof(function)/8)) ) 
							( (void (*)(void)) (function[i][0]) )();
			     }
	         break;
         }//switch
    }//while (1)
	return 0;
}

void __irq MEint4567Isr(void)
{
    rINTMSK|=(BIT_GLOBAL|BIT_EINT4567);
    exeLoadedcode=1;
    Mwhich_int=rEXTINTPND;
    rEXTINTPND=0x0f;		//clear EXTINTPND reg.		
    rI_ISPC=BIT_EINT4567;	//clear pending_bit
    rINTMSK&=~(BIT_GLOBAL|BIT_EINT4567); 
}

int Uart_Getaddress(char *str, INT32U *address){
  char aa;
  char *buff;
  INT32U tempaddress=RAM_ADDRESS;
  int result=0;

  buff=str;
  Uart_GetString(buff);
  buff=str;
    while(*buff++!='\0')
	  {
	      aa=*buff;
	      result=0;
		if(aa=='x'||aa=='X')
		{
	        tempaddress=0;
	        buff++;
	        result=0;
			while(*buff!='\0')
			{
		           
		     aa=*buff;
		     buff++;
		     if((aa>=0x30)&&(aa<=0x39))          /* Destination IP address */
		     {
		       	  aa=aa-'0';
		     }
			   else if ((aa>='A')&&(aa<='F'))
			   {
				  aa=aa-'A'+10;
			   }
			   else if((aa>='a')&&(aa<='f'))
			   {
				  aa=aa-'a'+10;
			   }
			   else
			   {
			   	result=-1;
			   	break;
			   }
			   tempaddress=(tempaddress<<4)+aa;
			}
		}
		
	   }
	   if(result!=0)
	   {
				Uart_Printf("\nPlease input Hex value, example: 0xc008000\n");
				result=-1;
	   }
	   *address=tempaddress;
	   return(result);
}