S3C2410的WINCE BSP添加串口支持

admin @ 2014-03-25 , reply:0

    最近在調優龍ST2410的板子,總體來說,優龍的板子做的不錯,技術支持也還可以~
    不過呢,優龍提供的WinCE BSP也只是在三星的公版BSP上少量修改而成的,雖然三星S3C2410能夠提供3個UART支持,也就是說每個UART控制器都可以工作在Interrupt(中斷)模式或DMA(直接內存訪問)模式,但是三星提供的公版BSP上只添加了UART0(COM1)和UART2(紅外)的支持,所以優龍提供的BSP也就只有一個串口能用,另外一個紅外我也不知道怎麼用(沒有紅外設備測試)。
    這樣的話,我買的板子上面的兩個串口豈不是浪費了一個,這可不行,因為COM1是默認作為調試串口了,系統的啟動信息都是靠這個串口輸出的,總不能調試和使用共用一個吧!
    在優龍官方論壇尋覓未果,他們好像就沒做UART1的BSP支持,這樣,只好自己動手,豐衣足食了。
    我的平台是WinCE 5.0和Platform Builder 5.0,雖然手頭的資料都是WinCE 4.2的,但根據修改比較,好像沒有區別,不知道WinCE 5.0到底升級了什麼?

首先列舉一下要修改文件的清單:
SMDK2410FILESplatform.reg
SMDK2410INCoalintr.h
SMDK2410DRIVERSSERIALser2410_hw.c
SMDK2410DRIVERSSERIALser2410_ser.c
SMDK2410KERNELHALcfw.c
SMDK2410KERNELHALARMarmint.c
SMDK2410smdk2410.cec


好了,Let's gooooooooo~

1、打開platform.reg文件,這個是WinCE註冊表文件,在這裡,我們要修改並添加串口。
搜索:[HKEY_LOCAL_MACHINEDriversBuiltInSER2410],這就是串口1。
將其下面的鍵值改為:

[HKEY_LOCAL_MACHINEDriversBuiltInSER2410]
  "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

再在其後面添加串口2:

[HKEY_LOCAL_MACHINEDriversBuiltInSER2410_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_MACHINEDriversBuiltInSER2410_2Unimodem]
  "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_MACHINEDriversBuiltInIRDA2410],這個是紅外,也要修改下:

[HKEY_LOCAL_MACHINEDriversBuiltInIRDA2410]
  "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,註冊表就改到這裡,以上要特別注意Irq的值,要和oalintr.h裡面的中斷定義對應,並且注意Order的順序,DeviceArrayIndex的值以及IoBase,後面串口源代碼中要用到該值作判斷。

2、打開oalintr.h文件,我們添加一個新的串口,並定義中斷號。
添加:

#define SYSINTR_SERIAL1  (SYSINTR_FIRMWARE+19)

這裡,我們可以看到SYSINTR_SERIAL1定義到16+19=35=0x23,與註冊表中一致。
然後修改下這個地方:

MapIrq2SysIntr(DWORD _Irq)
{
   if( _Irq<=19 )
       return ( SYSINTR_FIRMWARE + _Irq );
   else
       return (0xffffffff);
}

3、打開串口源文件中ser2410_hw.c文件。
搜索:
S2410_SetSerialIOP(
      PVOID   pHead // @parm points to device head
      )
將其函數改為:

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

 RETAILMSG(DEBUGMODE, (TEXT("S2410_SetSerialIOP ")));
 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));
}

接著搜索:
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;這一句後面添加:

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
 {
 把這其中的代碼修改為以下代碼
 }

   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
 {
 把這其中的代碼修改為以下代碼
 }

   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);   
   }

4、打開ser2410_ser.c文件。
搜索:
const HWOBJ IoObj = {
 THREAD_AT_INIT,
 SYSINTR_SERIAL,
 (PHW_VTBL) &IoVTbl
};
在其後面添加:

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

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

接著搜索:
const PCHWOBJ HWObjects[] = {
 &IoObj,
 &IrObj
};
將其修改為:

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

再搜索:
GetSerialObject(
              DWORD DeviceArrayIndex
              )
將其函數改為:

{
 PHWOBJ pSerObj;

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

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

 return (pSerObj);
}

5、打開cfw.c文件,這就是中斷處理。
搜索:
BOOL
OEMInterruptEnable(DWORD  idInt,  // @parm Interrupt ID to be enabled. See <l Interrupt ID's.Interrupt ID's>  for a list of possble values.
          LPVOID pvData,  // @parm ptr to data passed in in the <f InterruptInitialize> call
              DWORD  cbData)  // @parm Size of data pointed to be <p pvData>
找到這一句:case SYSINTR_SERIAL:
在其後面添加:

 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 <t Interrupt ID's>
還是這一句:case SYSINTR_SERIAL:
在其後面添加:

 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 <t Interrupt ID's>
依舊找到case SYSINTR_SERIAL:
在其後面添加:

 case SYSINTR_SERIAL1:
   s2410INT->rINTMSK    &= ~BIT_UART1;
   s2410INT->rINTSUBMSK &= ~INTSUB_RXD1;
   break;

6、打開armint.c文件。
搜索:else if(IntPendVal == INTSRC_UART0)
在其後面添加:

 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);
  
 }

7、打開smdk2410.cec文件,添加UART1這個feature。
搜索
ComponentType
(
 Name ( "Serial" )
 GUID ( {6563AD6C-E71C-11D4-B892-0050FC049781} )
 MaxResolvedImpsAllowed( 999 )
 Implementations
 (
   Implementation
   (
     Name ( "S32410 Serial UART" )
在其後面添加:

   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)PLATFORMSMDK2410driversserial")')
        )
     )
   )

我感覺這個改不改沒什麼關係,反正網上有人這樣改了,我也就改了,但是實際內核定製時中並沒有添加上這個feature。

到這裡,整個過程就結束了,耗費了我整整一天!其實改動量並不大,但是調試一次光編譯就要15分鐘,還要下載,燒寫,啟動~唉,沒有模擬器就是麻煩。調了好多次沒有成功,就是在註冊表的中斷號那兒出了問題,呵呵!




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