串口发短信之二－－－修改注册表，支持com2

    EVC串口通信编写完成后，发现通过开发板com1与pc通信时，除了我所以发送的信息之外，我的每一个动作（点击按钮，打开窗口…………）都主动发送的pc的串口调试助手上；而通过开发板com2与pc通信时，我所以发送的信息和每一动作又都没又发送的pc的串口调试助手上，真是奇怪！！！

    于是上网找答案，终于发现原因：原来三星的2410板子的BSP只添加了一个串口（这里对应com1）和一个红外口（这里对应com3）的支持，其中所支持的串口还是作为调试端口提供的。为什么说这里对应comX呢？原因是串口和与之对应的comX是可以修改的，以下有该说明。

    这样，周淳和我的目标就是修改BSP源码，使之支持正常的串口通信，一般对应于com2。

    在网上搜索到了不少相关的文章，但是都有这点、那点的小bug。以下是周淳和我所使用的一个版本，经过我们的研究已经更正了一些错误，现在已经能够成功的使2410开发板的wince4.2系统支持com2口通信！

    原文地址：http://blog.csdn.net/slyzhang/archive/2007/07/04/1678024.aspx

    修改的源码如下：

需要更改的内容：

\FILES\platform.reg
\INC\oalintr.h
\DRIVERS\SERIAL\ser2410_hw.c
\DRIVERS\SERIAL\ser2410_ser.c
\KERNEL\HAL\cfw.c
\KERNEL\HAL\ARM\armint.c 

修改步骤如下：

1、中断源修改
#define SYSINTR_SERIAL1  (SYSINTR_FIRMWARE+19)
修改以下中断范围使之能包含这个新添加的中断。
MapIrq2SysIntr(DWORD _Irq)
{
   if( _Irq<=19 )
       return ( SYSINTR_FIRMWARE + _Irq );
   else
       return (0xffffffff);
}

 // 19 这个数字根据您的系统而定，并且需要和注册表相匹配。
这里，我们可以看到SYSINTR_SERIAL1定义到19=0x13，与注册表中一致。
2、打开串口源文件中ser2410_hw.c文件。这个文件修改了数据结构根据注册表中的配置情况进行端口匹配。
搜索：
S2410_SetSerialIOP(
      PVOID   pHead // @parm points to device head
      )
将其函数改为：

{
 PS2410_UART_INFO   pHWHead   = (PS2410_UART_INFO)pHead;
 PSER_INFO     pHWHead1  = (PSER_INFO)pHead;

 RETAILMSG(DEBUGMODE, (TEXT("S2410_SetSerialIOP \r\n")));
 if(pHWHead1->dwIOBase == 0x50004000)
 {
 #if USEVIRTUAL
   EnterCriticalSection(&(pHWHead->RegCritSec));
   v_pIOPregs->rGPHCON &= ~(0x3<<8 | 0x3<<10 /*| 0x3<<12 | 0x3<<14*/); // clear
uart 1 - rx, tx
   v_pIOPregs->rGPHCON |= (0x2<<8 | 0x2<<10 /*| 0x1<<12 | 0x0<<14*/);
   v_pIOPregs->rGPHCON |= (0x2<<0 | 0x2<<2 );
   v_pIOPregs->rGPHUP  |= 0x03;
   pHWHead->rDTRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->rDSRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum = 1;
 #else
   volatile IOPreg *s2410IOP;
   s2410IOP   = (volatile IOPreg *)IOP_BASE;
 
   EnterCriticalSection(&(pHWHead->RegCritSec));
   s2410IOP->rGPHCON &= ~(0x3<<8 | 0x3<<10/* | 0x3<<12 | 0x3<<14*/); // clear
uart 1 - rx, tx
   s2410IOP->rGPHCON |= (0x2<<8 | 0x2<<10 /*| 0x1<<12 | 0x0<<14*/);
   s2410IOP->rGPHCON |= (0x2<<0 | 0x2<<2 );
   s2410IOP->rGPHUP  |= 0x03;
   pHWHead->rDTRport = (volatile unsigned int *)(IOP_BASE+0x74);
//s2410IOP->rGPHDAT
   pHWHead->rDSRport = (volatile unsigned int *)(IOP_BASE+0x74);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum = 1;
 #endif
 }
 else if(pHWHead1->dwIOBase == 0x50008000)
 {
 #if USEVIRTUAL
   EnterCriticalSection(&(pHWHead->RegCritSec));
   v_pIOPregs->rGPHCON &= ~( 0x3<<12 | 0x3<<14); // clear uart 2 - rx, tx
   v_pIOPregs->rGPHCON |= ( 0x2<<12 | 0x2<<14);
   v_pIOPregs->rGPHCON |= (0x2<<0 | 0x2<<2 );
   v_pIOPregs->rGPHUP  &= ~0xc0;
   pHWHead->rDTRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->rDSRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum = 1;
 #else
   volatile IOPreg *s2410IOP;
   s2410IOP   = (volatile IOPreg *)IOP_BASE;
 
   EnterCriticalSection(&(pHWHead->RegCritSec));
   s2410IOP->rGPHCON &= ~(0x3<<12 | 0x3<<14); // clear uart 2 - rx, tx
   s2410IOP->rGPHCON |= ( 0x02<<12 | 0x02<<14);
   s2410IOP->rGPHCON |= (0x2<<0 | 0x2<<2 );
   s2410IOP->rGPHUP  &= ~0xc0;
   pHWHead->rDTRport = (volatile unsigned int *)(IOP_BASE+0x74);
//s2410IOP->rGPHDAT
   pHWHead->rDSRport = (volatile unsigned int *)(IOP_BASE+0x74);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum = 1;
 #endif   
 }
 else
 {
 #if USEVIRTUAL
   EnterCriticalSection(&(pHWHead->RegCritSec));
   v_pIOPregs->rGPHCON &= ~(0x3<<0 | 0x3<<2 | 0x3<<4 | 0x3<<6/* | 0x3<<12 |
0x3<<14*/); // clear uart 0 - rx, tx
   v_pIOPregs->rGPHCON |= (0x2<<4 | 0x2<<6/* | 0x1<<12 | 0x0<<14*/);
   v_pIOPregs->rGPHCON |= (0x2<<0 | 0x2<<2 );
   v_pIOPregs->rGPHUP  |= 0x03;
   pHWHead->rDTRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->rDSRport = (volatile unsigned int *)&(v_pIOPregs->rGPHDAT);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum = 1;
 #else
   volatile IOPreg *s2410IOP;
   s2410IOP   = (volatile IOPreg *)IOP_BASE;
 
   EnterCriticalSection(&(pHWHead->RegCritSec));
   s2410IOP->rGPHCON &= ~(0x3<<0 | 0x3<<2 | 0x3<<4 | 0x3<<6 /*| 0x3<<12 |
0x3<<14*/); // clear uart 0 - rx, tx
   s2410IOP->rGPHCON |= (0x2<<4 | 0x2<<6 /*| 0x1<<12 | 0x0<<14*/);
   s2410IOP->rGPHCON |= (0x2<<0 | 0x2<<2 );
   s2410IOP->rGPHUP  |= 0x03;
   pHWHead->rDTRport = (volatile unsigned int *)(IOP_BASE+0x74);
//s2410IOP->rGPHDAT
   pHWHead->rDSRport = (volatile unsigned int *)(IOP_BASE+0x74);
   pHWHead->DtrPortNum = 0;
   pHWHead->DsrPortNum =1;
 #endif
 }
 LeaveCriticalSection(&(pHWHead->RegCritSec));
}

接着搜索：
SL_Init(
      PVOID   pHead, // @parm points to device head
      PUCHAR  pRegBase, // Pointer to 16550 register base
      UINT8   RegStride, // Stride amongst the 16550 registers
      EVENT_FUNC EventCallback, // This callback exists in MDD
      PVOID   pMddHead,   // This is the first parm to callback
      PLOOKUP_TBL   pBaudTable  // BaudRate Table
      )
在PS2410_UART_INFO   pHWHead   = (PS2410_UART_INFO)pHead;这一句后面添加：

PSER_INFO     pHWHead1  = (PSER_INFO)pHead;

再搜索：
 if ( pHWHead->UseIrDA )
 {
   pHWHead->bINT = BIT_UART2;
   pHWHead->bTxINT = INTSUB_TXD2;
   pHWHead->bRxINT = INTSUB_RXD2;
   pHWHead->bErrINT = INTSUB_ERR2;
#if USEVIRTUAL
   pHWHead->s2410SerReg = (S2410_UART_REG *)v_pUART2regs;
   pRegBase = (PUCHAR)pHWHead->s2410SerReg;
#else   
   pRegBase = (PUCHAR)UART2_BASE;
   pHWHead->s2410SerReg = (S2410_UART_REG *)pRegBase;
#endif
 }
 else
 {
 把这其中的代码修改为以下代码
 }

   if(pHWHead1->dwIOBase == 0x50004000)
   {
     pHWHead->bINT = BIT_UART1;
     pHWHead->bTxINT = INTSUB_TXD1;
     pHWHead->bRxINT = INTSUB_RXD1;
     pHWHead->bErrINT = INTSUB_ERR1;
   #if USEVIRTUAL
     pHWHead->s2410SerReg = (S2410_UART_REG *)v_pUART1regs;
     pRegBase = (PUCHAR)pHWHead->s2410SerReg;
   #else   
     pRegBase = (PUCHAR)UART1_BASE;
     pHWHead->s2410SerReg = (S2410_UART_REG *)pRegBase;
   #endif
    
   }
   else if(pHWHead1->dwIOBase == 0x50008000)
   {
     pHWHead->bINT = BIT_UART2;
     pHWHead->bTxINT = INTSUB_TXD2;
     pHWHead->bRxINT = INTSUB_RXD2;
     pHWHead->bErrINT = INTSUB_ERR2;
   #if USEVIRTUAL
     pHWHead->s2410SerReg = (S2410_UART_REG *)v_pUART2regs;
     pRegBase = (PUCHAR)pHWHead->s2410SerReg;
   #else   
     pRegBase = (PUCHAR)UART2_BASE;
     pHWHead->s2410SerReg = (S2410_UART_REG *)pRegBase;
   #endif
   }
   else
   {
    
     pHWHead->bINT = BIT_UART0;
     pHWHead->bTxINT = INTSUB_TXD0;
     pHWHead->bRxINT = INTSUB_RXD0;
     pHWHead->bErrINT = INTSUB_ERR0;
   #if USEVIRTUAL
     pHWHead->s2410SerReg = (S2410_UART_REG *)v_pUART0regs;
     pRegBase = (PUCHAR)pHWHead->s2410SerReg;
   #else   
     pRegBase = (PUCHAR)UART0_BASE;
     pHWHead->s2410SerReg = (S2410_UART_REG *)pRegBase;
   #endif
   }

再搜索：
 if ( pHWHead->UseIrDA )
 {
   pHWHead->pUFTXH = (volatile unsigned char *)&(v_pUART2regs->rUTXH);
   pHWHead->pUFRXH = (volatile unsigned char *)&(v_pUART2regs->rURXH);   
 }
 else
 {
 把这其中的代码修改为以下代码
 }

   if(pHWHead1->dwIOBase == 0x50004000)
   {
     pHWHead->pUFTXH = (volatile unsigned char *)&(v_pUART1regs->rUTXH);
     pHWHead->pUFRXH = (volatile unsigned char *)&(v_pUART1regs->rURXH);
   }
   else if(pHWHead1->dwIOBase == 0x50008000)
   {
     pHWHead->pUFTXH = (volatile unsigned char *)&(v_pUART2regs->rUTXH);
     pHWHead->pUFRXH = (volatile unsigned char *)&(v_pUART2regs->rURXH);      
   }
   else
   {
     pHWHead->pUFTXH = (volatile unsigned char *)&(v_pUART0regs->rUTXH);
     pHWHead->pUFRXH = (volatile unsigned char *)&(v_pUART0regs->rURXH);   
   }
3、打开ser2410_ser.c文件。
搜索：
const HWOBJ IoObj = {
 THREAD_AT_INIT,
 SYSINTR_SERIAL,
 (PHW_VTBL) &IoVTbl
};
在其后面添加：

const HWOBJ Io1Obj = {
 THREAD_AT_INIT,
 SYSINTR_SERIAL1,
 (PHW_VTBL) &IoVTbl
};

const HWOBJ Io2Obj = {
 THREAD_AT_INIT,
 SYSINTR_IR,
 (PHW_VTBL) &IoVTbl
};

接着搜索：
const PCHWOBJ HWObjects[] = {
 &IoObj,
 &IrObj
};
将其修改为：

const PCHWOBJ HWObjects[] = {
 &IoObj,
 &Io1Obj,
 &Io2Obj
};

再搜索：
GetSerialObject(
              DWORD DeviceArrayIndex
              )
将其函数改为：

{
 PHWOBJ pSerObj;

 DEBUGMSG(DEBUGMODE,(TEXT("GetSerialObject : DeviceArrayIndex = %d\r\n"),
DeviceArrayIndex));

 // Now return this structure to the MDD.
 if ( DeviceArrayIndex == 2 )
 { 
   RETAILMSG(1,(TEXT("GetSerialObject Io2Obj\r\n")));
   pSerObj = (PHWOBJ)(&Io2Obj);
 }
 else if(DeviceArrayIndex == 1)
   pSerObj = (PHWOBJ)(&Io1Obj);
 else
   pSerObj = (PHWOBJ)(&IoObj);

 return (pSerObj);
}
4、打开cfw.c文件，这就是中断处理。
搜索：
BOOL
OEMInterruptEnable(DWORD  idInt,  // @parm Interrupt ID to be enabled. See Interrupt ID's.Interrupt ID's>  for a list of possble values.
          LPVOID pvData,  // @parm ptr to data passed in in the InterruptInitialize> call
              DWORD  cbData)  // @parm Size of data pointed to be

找到这一句：case SYSINTR_SERIAL:
在其后面添加：

 case SYSINTR_SERIAL1:  // Serial port1.
   s2410INT->rSUBSRCPND  = (INTSUB_RXD1 | INTSUB_TXD1 | INTSUB_ERR1);
   s2410INT->rINTSUBMSK &= ~INTSUB_RXD1;
   s2410INT->rINTSUBMSK &= ~INTSUB_TXD1;
   s2410INT->rINTSUBMSK &= ~INTSUB_ERR1;
   s2410INT->rSRCPND     = BIT_UART1;
   // S3C2410X Developer Notice (page 4) warns against writing a 1 to a 0 bit in
the INTPND register.
   if (s2410INT->rINTPND & BIT_UART1) s2410INT->rINTPND = BIT_UART1;
   s2410INT->rINTMSK    &= ~BIT_UART1;
   break;

搜索：
void
OEMInterruptDisable(DWORD idInt)  // @parm Interrupt ID to be disabled. See Interrupt ID's>
还是这一句：case SYSINTR_SERIAL:
在其后面添加：

 case SYSINTR_SERIAL1:
   s2410INT->rINTMSK    |= BIT_UART1;
   s2410INT->rINTSUBMSK |= INTSUB_RXD1;
   s2410INT->rINTSUBMSK |= INTSUB_TXD1;
   s2410INT->rINTSUBMSK |= INTSUB_ERR1;
   break;

搜索：
void
OEMInterruptDone(DWORD idInt)  // @parm Interrupt ID. See
依旧找到case SYSINTR_SERIAL:
在其后面添加：

 case SYSINTR_SERIAL1:
   s2410INT->rINTMSK    &= ~BIT_UART1;
   s2410INT->rINTSUBMSK &= ~INTSUB_RXD1;
   break;
5、打开armint.c文件。
搜索：else if(IntPendVal == INTSRC_UART0)
在其后面添加：

 else if(IntPendVal == INTSRC_UART1)
 {
   SubIntPendVal = s2410INT->rSUBSRCPND;

   // Note that we only mask the sub source interrupt - the serial driver will
clear the
   // sub source pending register.
   //
   if(SubIntPendVal & INTSUB_ERR1)
   {
     s2410INT->rINTSUBMSK |= INTSUB_ERR1;
   }
   else if(SubIntPendVal & INTSUB_RXD1)
   {
     s2410INT->rINTSUBMSK |= INTSUB_RXD1;
   }
   else if(SubIntPendVal & INTSUB_TXD1)
   {
     s2410INT->rINTSUBMSK |= INTSUB_TXD1;
   }
   else
   {
     return(SYSINTR_NOP);
   }
 
   // NOTE: Don't clear INTSRC:UART1 here - serial driver does that.
   //
   s2410INT->rINTMSK |= BIT_UART1;
   if (s2410INT->rINTPND & BIT_UART1) s2410INT->rINTPND  = BIT_UART1;

   return(SYSINTR_SERIAL1);
  
 }

6、打开platform.reg文件，这个是WinCE注册表文件，在这里，我们要修改并添加串口。
搜索：[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SER2410]，这就是串口1。
将其下面的键值改为：

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SER2410]
  "DeviceArrayIndex"=dword:0
  "Irq"=dword:03
  "IoBase"=dword:50000000
  "IoLen"=dword:2C
  "Prefix"="COM"
  "Dll"="SER2410.Dll"
  "Order"=dword:0
  "Priority"=dword:0
  "Port"="COM1:"
  "DeviceType"=dword:0
  "FriendlyName"="Serial Cable on COM1:"
  "Tsp"="Unimodem.dll"
  "DevConfig"=hex: 10,00, 00,00, 05,00,00,00, 10,01,00,00, 00,4B,00,00, 00,00, 08, 00, 00, 00,00,00,00

再在其后面添加串口2：

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SER2410_2]
  "DeviceArrayIndex"=dword:1
  "Irq"=dword:13
  "IoBase"=dword:50004000
  "IoLen"=dword:2C
  "Prefix"="COM"
  "Dll"="SER2410.Dll"
  "Order"=dword:0
  "Priority"=dword:0
  "Port"="COM2:"
  "DeviceType"=dword:0
  "FriendlyName"="Serial Cable on COM2:"
  "Tsp"="Unimodem.dll"
  "DevConfig"=hex: 10,00, 00,00, 05,00,00,00, 10,01,00,00, 00,4B,00,00, 00,00, 08, 00, 00, 00,00,00,00

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SER2410_2\Unimodem]
  "Tsp"="Unimodem.dll"
  "DeviceType"=dword:0
  "FriendlyName"="SER2410_2 UNIMODEM"
  "DevConfig"=hex: 10,00, 00,00, 05,00,00,00, 10,01,00,00, 00,4B,00,00, 00,00,
08, 00, 00, 00,00,00,00

再搜索：[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\IRDA2410]，这个是红外，也要修改下：

[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\IRDA2410]
  "DeviceArrayIndex"=dword:2
  "Irq"=dword:09
  "IoBase"=dword:50008000
  "IoLen"=dword:2C
  "Prefix"="COM"
  "Dll"="IRDA2410.Dll"
  "Order"=dword:0
  "Priority"=dword:0
  "Port"="COM3:"
  "DeviceType"=dword:0  ; IRDA modem, 0 -> null modem
  "FriendlyName"="S2410 IRDA2410"
; "Index"=dword:3
  "IClass"="{A32942B7-920C-486b-B0E6-92A702A99B35}"

好了，注册表就改到这里，以上要特别注意Irq的值，要和oalintr.h里面的中断定义对应，并且注意Order的顺序，DeviceArrayIndex的值以及IoBase，后面串口源代码中要用到该值作判断。