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S3C2410的WINCE BSP添加串口支持
tongxin | 2009-04-28 15:32:41    阅读：1018   发布文章

       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！

*博客内容为网友个人发布，仅代表博主个人观点，如有侵权请联系工作人员删除。

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