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S3C2410的WINCE BSP添加串口支持

时间:2008-06-25   来源:   作者:coldfly   点击:……  字体大小:【

    最近在调优龙ST2410的板子,总体来说,优龙的板子做的不错,技术支持也还可以~
    不过呢,优龙提供的WinCE BSP也只是在三星的公版BSP上少量修改而成的,虽然三星S3C2410能够提供3个UART支持,也就是说每个UART控制器都可以工作在Interrupt(中断)模式或DMA(直接内存访问)模式,但是三星提供的公版BSP上只添加了UART0(COM1)和UART2(红外)的支持,所以优龙提供的BSP也就只有一个串口能用,另外一个红外我也不知道怎么用(没有红外设备测试)。
    这样的话,我买的板子上面的两个串口岂不是浪费了一个,这可不行,因为COM1是默认作为调试串口了,系统的启动信息都是靠这个串口输出的,总不能调试和使用共用一个吧!
    在优龙官方论坛寻觅未果,他们好像就没做UART1的BSP支持,这样,只好自己动手,丰衣足食了。
    我的平台是WinCE 5.0和Platform Builder 5.0,虽然手头的资料都是WinCE 4.2的,但根据修改比较,好像没有区别,不知道WinCE 5.0到底升级了什么?

首先列举一下要修改文件的清单:
SMDK2410FILESplatform.reg
SMDK2410INCoalintr.h
SMDK2410DRIVERSSERIALser2410_hw.c
SMDK2410DRIVERSSERIALser2410_ser.c
SMDK2410KERNELHALcfw.c
SMDK2410KERNELHALARMarmint.c
SMDK2410smdk2410.cec


好了,Let's gooooooooo~

1、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_MACHINEDriversBuiltInSER2410],这就是串口1。
将其下面的键值改为:

[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

再在其后面添加串口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],这个是红外,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,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。

2、打开oalintr.h文件,我们添加一个新的串口,并定义中断号。
添加:

#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);
}

3、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:

{
 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);   
   }

4、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 "), 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 <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 <t 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 <t Interrupt ID's>
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;

6、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);
  
 }

7、打开smdk2410.cec文件,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)PLATFORMSMDK2410driversserial")')
        )
     )
   )

我感觉这个改不改没什么关系,反正网上有人这样改了,我也就改了,但是实际内核定制时中并没有添加上这个feature。

到这里,整个过程就结束了,耗费了我整整一天!其实改动量并不大,但是调试一次光编译就要15分钟,还要下载,烧写,启动~唉,没有仿真器就是麻烦。调了好多次没有成功,就是在注册表的中断号那儿出了问题,呵呵!


Tags:s3c2410   BSP   WinCE    
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