Wince 串口驱动详解－转载

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文件大小：122.5 KB 上传者：papa123 时间：2009-06-25 15:59:35 下载量：11
1、(oalintr.h)注册串口中断
//SP-A1
/*
打开oalintr.h文件，我们添加一个新的串口，并定义中断号。
添加：
//SP-A8没什么说的就是注册中断
#define SYSINTR_SERIAL1  (SYSINTR_FIRMWARE+19)


这里，我们可以看到SYSINTR_SERIAL1定义到16+19=35=0x23，与注册表中一致。
然后修改下这个地方：
MapIrq2SysIntr(DWORD _Irq)
{
   if( _Irq<=19 )
       return ( SYSINTR_FIRMWARE + _Irq );
   else
       return (0xffffffff);
}  
*/

2、(armint.c)在ISR中进行中断判断，中断使能
//SP-A2
/*
//SP-A9其中IntPendVal= s2410INT->rINTOFFSET
//INTOFFSET是中断偏移寄存器，显示中断请求源，跟SRCPND一样//在IRQ模式中，该寄存器显示INTPND寄存器中的中断请求

搜索：else if(IntPendVal == INTSRC_UART0)
在其后面添加：

//SP-A10此处进行中断请求源的判断。INTSRC_UART1被定义为UART1的中断号，即SRCPND==23
else if(IntPendVal == INTSRC_UART1)
{
   //SP-A11 SUBSRCPND中包含一些中断请求的细节，对于串口就是INT_ERR、INT_RXD、INT_TXD
   //用于进一步判断中断类型
   SubIntPendVal = s2410INT->rSUBSRCPND;

   // Note that we only mask the sub source interrupt - the serial driver will clear the
   // sub source pending register.
   //
   //SP-A11.1如果是ERR1则该位置0，解除该位中断屏蔽INTSUBMSK
   if(SubIntPendVal & INTSUB_ERR1)
   {
     s2410INT->rINTSUBMSK |= INTSUB_ERR1;
   }
   else if(SubIntPendVal & INTSUB_RXD1)  //SP-A11.2 RXD1，解除该位中断屏蔽INTSUBMSK
   {
     s2410INT->rINTSUBMSK |= INTSUB_RXD1;
   }
   else if(SubIntPendVal & INTSUB_TXD1)  //SP-A11.3 TXD1,
   {
     s2410INT->rINTSUBMSK |= INTSUB_TXD1;
   }
   else
   {
     return(SYSINTR_NOP);   //SP-A11.4什么都没发生
   }

   // NOTE: Don't clear INTSRC:UART1 here - serial driver does that.
   //
   //SP-A12解放对应位的总中断屏蔽，此时中断请求IRQ已经传达给CPU
   s2410INT->rINTMSK |= BIT_UART1;

   //SP-A13 INTPND显示哪个中断处于非屏蔽且等待服务的状态，即“该中断被确定了（asserted 1）”，“相对于pending（待定）”
   //现在判断完成，即“该中断被确定了，所以向它发1，将之置0，清除中断请求
   if (s2410INT->rINTPND & BIT_UART1) s2410INT->rINTPND  = BIT_UART1;

   //SP-A14向Wince发出对应的逻辑中断处理请求
   return(SYSINTR_SERIAL1);
   
}
*/

3、(cfw.c)在IST中进行对应中断的使能和禁止
/*
//SP-A15此处是串行中断初始化，将所有串行中断屏蔽unmask,将所有串行中断残留pending清除。
BOOL
OEMInterruptEnable(DWORD  idInt,  // @parm Interrupt ID to be enabled. See   for a list of possble values.
          LPVOID pvData,  // @parm ptr to data passed in in the 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;

//SP-A16此处是串行中断禁止，即屏蔽所有串行中断位
搜索：
void
OEMInterruptDisable(DWORD idInt)  // @parm Interrupt ID to be disabled. See
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;

//SP-A17解除屏蔽？
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;

*/

4、(ser2410_hw.c)驱动程序进行处理
//SP-A4
/*
打开串口源文件中ser2410_hw.c文件。
搜索：
S2410_SetSerialIOP(
      PVOID   pHead // @parm points to device head
      )
将其函数改为：

{
//SP-A18 2410串口信息结构体
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)  //SP-UART1 LINE CONTROL
{
#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));
   //SP-A19 IO口设置
   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)  //SP-UART2 LINE CONTROL
{
#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       //SP-UART? LINE CONTROL
{
#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);   
   }

*/

5、(ser2410_ser.c)驱动程序进一步处理
//SP-A4
*/
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);
}
*/

6、在CEC中增加特性
//SP-A6
/*
添加UART1这个feature。
搜索
ComponentType
(
Name ( "Serial" )
GUID ( {6563AD6C-E71C-11D4-B892-0050FC049781} )
MaxResolvedImpsAllowed( 999 )
Implementations
(
   Implementation
   (
     Name ( "S32410 Serial UART" )
在其后面添加：

   Implementation  
   (
     Name ( "S32410 Serial UART1" )
     GUID ( {7C4427A5-286C-4C7A-B687-4E3B364D079B} )
     Description ( "Samsung S32410 serial UART controller." )
     BSPPlatformDir ( "smdk2410" )
     Version ( "5.0.0.0" )
     Locale ( 0409 )
     Vendor ( "Microsoft" )
     Date ( "2003-1-13" )
     SizeIsCPUDependent( 1 )
     BuildMethods
     (
       BuildMethod
       (
         GUID ( {07DA2083-6261-4ED6-B5BB-70CF4D930D68} )
         Step ( BSP )
         CPU ( "ARMV4" )
         CPU ( "ARMV4I" )
         Action ( '#BUILD(SOURCES,"$(_WINCEROOT)\PLATFORM\SMDK2410\drivers\serial")')
        )
     )
   )
*/

7、修改注册表
//SP-A7
/*
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:13
  "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:23
  "IoBase"=dword:50004000
  "IoLen"=dword:2C
  "Prefix"="COM"
  "Dll"="SER2410.Dll"
  "Order"=dword:1
  "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:19
  "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:2
  "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。

*/

[hide]相关代码[/hide]

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