Windows CE6.0中断实验过程
----利用键盘控制LED的驱动程序
1.实验目的：通过本次试验学习Windows CE6.0的中断处理的过程以及熟悉在驱动程序中运行中断的编程。
2.我对Windows CE6.0中断的理解：
Windows® CE将中断处理分成两个步骤：中断服务程序ISR和中断服务线程IST。如果中断被使能，则当中断产生时，内核将调用该中断注册的ISR，ISR执行完后将返回系统中断号，内核检查系统中断号并且设置相关的事件，内核设置相关事件后，相应的IST将开始执行。
3.Windows® CE的处理流程：
（1）如果一个驱动程序要处理一个中断，那么驱动程序首先要建立一个事件（CreateEvent），然后调用InterruptInitialize将该事件与中断号绑定，这一步会使能该中断，OAL中的OEMInerrupteEnable会被调用，如果该函数不返回true的话，InterruptInitialize就会失败。然后驱动程序中的IST就可以使用WaitForSingleObject函数来等待中断的发生。
（2）当一个硬件中断发生之后，操作系统陷入异常，中断向量指示进入CE的异常处理程序，该异常处理程序然后调用OAL的OEMInterruptHandler函数，该函数检测硬件之后，将硬件中断转换为软件的中断号，返回给系统。该中断号就是上面提到的InterruptInitialize中使用的那个中断号。系统得到该中断号之后，就会找到该中断号对应的事件，并唤醒等待相应事件的线程(IST)，然后IST就可以在用户态进行中断处理。处理完成之后，IST需要调用InterruptDone来告诉操作系统中断处理结束，操作系统调用OAL中的OEMInterruptDone函数，最后完成中断的处理。
4.在驱动中安装中断的方法：
首先， 在驱动中通过 CreateEvent()函数创建一个 Event 内核对象， 然后通过 InterruptInitialize()
函数负责把某个逻辑中断号与这个 Event 内核对象关联起来。当中断发生时，操作系统负责引发此
Event 事件，函数的原型如下：
InterruptInitialize(DWORD idInt, // SYSINTR中断号
HANDLE hEvent , // 与该中断相关联的事件句柄
LPVOID pvData, // 传给OEMInterruptEnable缓冲指针
DWORD cbData, // 缓冲区的大小
)
然后通过 CreatThread()函数来来创建一个线程，在线程函数中用 WaitForSingleObject()来阻塞
当前的线程，等待某个 Event 内核对象标识的事件发生。当中断发生后，OAL层就会返回逻辑中断，
与逻辑中断相关联的 Event 事件就会被触发，被阻塞的中断线程函数就会就绪开始工作。
InterruptDonce()函数用来告诉操作系统， 对该中断的处理已完成， 操作系统可重新开启该中断。
5.步骤：
1.在vs2005里面新建一个DLL的子项目MyKey，在F:/WINCE600/PLATFORM/SMDK6410/SRC/DRIVERS/目录下
2.添加MyKey.c和MyKey.h文件，编辑源程序，如下：
MyKey.h：
#ifndef _MYKEY_H
#define _MYKEY_H
#ifdef __cplusplus
Extern "C" {
#endif
typedef struct {
volatile S3C6410_GPIO_REG *pGPIOregs;
BOOL FlagExitThrd;
} KEY_PUBLIC_CONTEXT, *PKEY_PUBLIC_CONTEXT;
#ifdef __cplusplus
}
#endif
#endif
MyKey.c：
#include <windows.h>
#include <nkintr.h>
#include <pm.h>
#include <nkintr.h>
#include <bsp.h>
#include <s3c6410.h>
#include <s3c6410_vintr.h>
#include <DrvLib.h>
#include "MyKey.h"
#define Led1Mask 0x01
#define Led2Mask 0x02
#define Led3Mask 0x04
#define Led4Mask 0x08
#define LedAllMask 0x0F
#define Butt1Mask 0x01
#define Butt2Mask 0x02
#define Butt3Mask 0x04
#define Butt4Mask 0x08
#define Butt5Mask 0x10
#define Butt6Mask 0x20
static KEY_PUBLIC_CONTEXT *pPublicKey = NULL;
static volatile UINT32 dwLedFlag = 1;
UINT32 g_SysIntr1 = 0;
UINT32 g_SysIntr2 = 0;
HANDLE g_hEvent1 = NULL;
HANDLE g_hThread1 = NULL;
HANDLE g_hEvent2 = NULL;
HANDLE g_hThread2 = NULL;
/******************************************************************************
*
* MyKey button event thread
*
*******************************************************************************/
INT WINAPI Button1Thread(void)
{
RETAILMSG(1, (TEXT("Button1 Thread Entered ! /r/n")));
while(!pPublicKey->FlagExitThrd)
{
UINT16 ch;
RETAILMSG(1, (TEXT("Button1 KEY_Read: KEY Device Read Successfully./r/n")));
ch = (UINT16)pPublicKey->pGPIOregs->GPNDAT;
RETAILMSG(1,(TEXT("Button1 ReadValue: 0x%x /n"), ch));
RETAILMSG(1, (TEXT("Button1 Thread ! /r/n")));
WaitForSingleObject(g_hEvent1, INFINITE);
if(pPublicKey->FlagExitThrd)
break;
RETAILMSG(1, (TEXT("Button1 Thread Start Running ! /r/n")));
if( dwLedFlag == 1 )
{
dwLedFlag = 0;
pPublicKey->pGPIOregs->GPMDAT |= LedAllMask;
RETAILMSG(1, (TEXT("Button1 pressed---Led ALL On:/r/n")));
}
else
{
dwLedFlag = 1;
pPublicKey->pGPIOregs->GPMDAT &= ~LedAllMask;
RETAILMSG(1, (TEXT("Button1 pressed---Led ALL Off:/r/n")));
}
InterruptDone(g_SysIntr1);
}
RETAILMSG(1, (TEXT("KEY: KEY Button1Thread Exiting/r/n")));
return 0;
} // Key_Button1Thread()
INT WINAPI Button2Thread(void)
{
DWORD LedNum = 1;
RETAILMSG(1, (TEXT("Button2 Thread Entered ! /r/n")));
while(!pPublicKey->FlagExitThrd)
{
UINT16 ch;
RETAILMSG(1, (TEXT("Button2 KEY_Read: KEY Device Read Successfully./r/n")));
ch = (UINT16)pPublicKey->pGPIOregs->GPNDAT;
RETAILMSG(1,(TEXT("Button2 ReadValue: 0x%x /n"), ch));
RETAILMSG(1, (TEXT("Button2 Thread ! /r/n")));
WaitForSingleObject(g_hEvent2, INFINITE);
if(pPublicKey->FlagExitThrd)
break;
RETAILMSG(1, (TEXT("Button2 Thread Start Running ! /r/n")));
if( LedNum == 1 )
{
LedNum = 2;
pPublicKey->pGPIOregs->GPMDAT |= Led1Mask;
RETAILMSG(1, (TEXT("Button2 pressed---Led 1 on:/r/n")));
}
else if ( LedNum == 2 )
{
LedNum = 3;
pPublicKey->pGPIOregs->GPMDAT |= Led2Mask;;
RETAILMSG(1, (TEXT("Button2 pressed---Led 2 On:/r/n")));
}
else if ( LedNum == 3 )
{
LedNum = 4;
pPublicKey->pGPIOregs->GPMDAT |= Led3Mask;;
RETAILMSG(1, (TEXT("Button2 pressed---Led 3 On:/r/n")));
}
else if ( LedNum == 4 )
{
LedNum = 0;
pPublicKey->pGPIOregs->GPMDAT |= Led4Mask;;
RETAILMSG(1, (TEXT("Button2 pressed---Led 4 On:/r/n")));
}
else
{
LedNum = 1;
pPublicKey->pGPIOregs->GPMDAT &= ~LedAllMask;;
RETAILMSG(1, (TEXT("Button2 pressed---Led ALL off:/r/n")));
}
InterruptDone(g_SysIntr2);
}
RETAILMSG(1, (TEXT("KEY: KEY Button2Thread Exiting/r/n")));
return 0;
} // Key_Button2Thread()
BOOL KEY_Deinit(DWORD dwContext)
{
RETAILMSG(1, (TEXT("KEY_DeInit: dwContext = 0x%x/r/n/n"), dwContext));
// inform IST exit status
pPublicKey->FlagExitThrd = TRUE;
// free virtual memory
if(pPublicKey->pGPIOregs )
{
DrvLib_UnmapIoSpace((PVOID)pPublicKey->pGPIOregs);
pPublicKey->pGPIOregs = NULL;
}
if(g_hEvent1)
{
SetEvent(g_hEvent1);
InterruptDisable(g_SysIntr1);
CloseHandle(g_hEvent1);
}
if(g_hEvent2)
{
SetEvent(g_hEvent2);
InterruptDisable(g_SysIntr2);
CloseHandle(g_hEvent2);
}
// Wait for threads to finish
WaitForSingleObject(g_hThread1, INFINITE);
if(g_hThread1)
CloseHandle(g_hThread1);
WaitForSingleObject(g_hThread2, INFINITE);
if(g_hThread2)
CloseHandle(g_hThread2);
LocalFree(pPublicKey);
return (TRUE);
}
PKEY_PUBLIC_CONTEXT KEY_Init(DWORD dwContext)
{
LPTSTR ActivePath = (LPTSTR) dwContext; // HKLM/Drivers/Active/xx
BOOL bResult = TRUE;
DWORD dwHwIntr = 0;
RETAILMSG(1, (TEXT("KEY_Init:dwContext = 0x%x/r/n"), dwContext));
RETAILMSG(1,(TEXT("[KEY] Active Path : %s/n"), ActivePath));
if ( !(pPublicKey = (PKEY_PUBLIC_CONTEXT)LocalAlloc( LPTR, sizeof(KEY_PUBLIC_CONTEXT) )) )
{
RETAILMSG(1,(TEXT("[KEY] Can't not allocate for KEY Context/n")));
return NULL;
}
// GPIO Virtual alloc
pPublicKey->pGPIOregs = (volatile S3C6410_GPIO_REG *)DrvLib_MapIoSpace(S3C6410_BASE_REG_PA_GPIO, sizeof(S3C6410_GPIO_REG), FALSE);
if (pPublicKey->pGPIOregs == NULL)
{
RETAILMSG(1,(TEXT("[KEY] For pGPIOregs: DrvLib_MapIoSpace failed!/r/n")));
bResult = FALSE;
goto CleanUp;
}
//禁止上下拉
pPublicKey->pGPIOregs->GPMPUD = 0x00000000;
//GPM0-GPM3设置成输出
pPublicKey->pGPIOregs->GPMCON = 0x00001111;
//LED0-3熄灭
pPublicKey->pGPIOregs->GPMDAT = 0x0;
//设置EINT0中断
//禁止GPN0和GPN1上下拉
pPublicKey->pGPIOregs->GPNPUD &= ~0x0F;
//GPN0-1设置成外中断
pPublicKey->pGPIOregs->GPNCON |= 0x0a;
//使能外中断EINT0-EINT1
pPublicKey->pGPIOregs->EINT0MASK &= ~0x3;
//EINT0-1下降沿触发中断
pPublicKey->pGPIOregs->EINT0CON0 |= 0x2;
do
{
//Button1 Thread
pPublicKey->FlagExitThrd = FALSE;
g_hEvent1 = CreateEvent(NULL, FALSE, FALSE, NULL);
g_SysIntr1 = SYSINTR_UNDEFINED;
dwHwIntr = IRQ_EINT0;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(DWORD), &g_SysIntr1, sizeof(DWORD), NULL))
{
RETAILMSG(1,(TEXT("[KEY] Failed to request the KEY sysintr./n")));
g_SysIntr1 = SYSINTR_UNDEFINED;
bResult = FALSE;
break;
}
if (!InterruptInitialize(g_SysIntr1, g_hEvent1, NULL, 0))
{
RETAILMSG(1,(TEXT("[KEY] KEY Interrupt Initialization failed!!!/n")));
bResult = FALSE;
break;
}
g_hThread1 = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)Button1Thread, NULL, 0, NULL);
if (g_hThread1 == NULL)
{
RETAILMSG(1,(TEXT("[KEY] Key Button Thread creation error!!!/n")));
bResult = FALSE;
break;
}
//Button2 Thread
g_hEvent2 = CreateEvent(NULL, FALSE, FALSE, NULL);
g_SysIntr2 = SYSINTR_UNDEFINED;
dwHwIntr = IRQ_EINT1;
if (!KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwHwIntr, sizeof(DWORD), &g_SysIntr2, sizeof(DWORD), NULL))
{
RETAILMSG(1,(TEXT("[KEY] Failed to request the KEY sysintr./n")));
g_SysIntr2 = SYSINTR_UNDEFINED;
bResult = FALSE;
break;
}
if (!InterruptInitialize(g_SysIntr2, g_hEvent2, NULL, 0))
{
RETAILMSG(1,(TEXT("[KEY] KEY Interrupt Initialization failed!!!/n")));
bResult = FALSE;
break;
}
g_hThread2 = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)Button2Thread, NULL, 0, NULL);
if (g_hThread2 == NULL)
{
RETAILMSG(1,(TEXT("[KEY] Key Button2 Thread creation error!!!/n")));
bResult = FALSE;
break;
}
} while (0);
RETAILMSG(1,(TEXT("--[KEY] KEY_Init Function/r/n")));
if(bResult)
{
return pPublicKey;
}
else
{
return NULL;
}
CleanUp:
if (!bResult)
{
if (pPublicKey->pGPIOregs)
{
DrvLib_UnmapIoSpace((PVOID)pPublicKey->pGPIOregs);
pPublicKey->pGPIOregs = NULL;
}
return NULL;
}
}
DWORD KEY_Open(DWORD dwData, DWORD dwAccess, DWORD dwShareMode)
{
RETAILMSG(1, (TEXT("KEY_Open: KEY Device Open Successfully./r/n")));
return(dwData);
}
BOOL KEY_Close(DWORD Handle)
{
RETAILMSG(1, (TEXT("KEY_Close: KEY Device Close Successfully./r/n")));
return (TRUE);
}
DWORD KEY_Read(DWORD Handle, LPVOID pBuffer, DWORD dwNumBytes)
{
UINT16 ch;
DWORD result;
RETAILMSG(1, (TEXT("KEY_Read: KEY Device Read Successfully./r/n")));
ch = (UINT16)pPublicKey->pGPIOregs->GPNDAT;
if( (ch & Butt1Mask) != 0)
{
result = 1;
RETAILMSG(1, (TEXT("Button 1 pressed:/r/n")));
}
else if( (ch & Butt2Mask) != 0)
{
result = 2;
RETAILMSG(1, (TEXT("Button 2 pressed:/r/n")));
}
else
{
result = -1;
RETAILMSG(1, (TEXT("No Button pressed:/r/n")));
}
dwNumBytes = result;
return (dwNumBytes);
}
DWORD KEY_Write(DWORD Handle, LPCVOID pBuffer, DWORD dwNumBytes)
{
RETAILMSG(1, (TEXT("BTN_Write:KEY Device Write Successfully./r/n")));
return(TRUE);
}
DWORD KEY_Seek(DWORD Handle, long lDistance, DWORD dwMoveMethod)
{
return (DWORD)-1;
}
void KEY_PowerDown(void)
{
return;
}
void KEY_PowerUp(void)
{
return;
}
BOOL KEY_IOControl(DWORD hOpenContext,DWORD dwCode,PBYTE pBufIn,DWORD dwLenIn,PBYTE pBufOut,DWORD dwLenOut,PDWORD pdwActualOut)
{
RETAILMSG(1, (TEXT("BTN_IOControl:/r/n")));
return(TRUE);
}
/*******************************************************************************
*DLL入口函数
*******************************************************************************/
BOOL
DllEntry(
HINSTANCE hinstDll,
DWORD dwReason,
LPVOID lpReserved
)
{
if ( dwReason == DLL_PROCESS_ATTACH )
{
DEBUGMSG (1, (TEXT("[MyKey] Process Attach/r/n")));
}
if ( dwReason == DLL_PROCESS_DETACH )
{
DEBUGMSG (1, (TEXT("[MyKey] Process Detach/r/n")));
}
return(TRUE);
}
3.编写配置文件，包括如下文件sources，MyKey.def，makefile如下：
技巧：可以到其他驱动程序目录下拷贝在加以修改
Sources：
RELEASETYPE=PLATFORM
PREPROCESSDEFFILE=1
TARGETNAME=MyKey
TARGETTYPE=DYNLINK
DEFFILE=MyKey.def
DLLENTRY=DllEntry
TARGETLIBS= /
$(_PROJECTROOT)/cesysgen/sdk/lib/$(_CPUINDPATH)/coredll.lib /
$(_TARGETPLATROOT)/lib/$(_CPUINDPATH)/DriverLib.lib
SOURCES= /
MyKey.c
MyKey.def：
LIBRARY MyKey
EXPORTS
KEY_Init
KEY_Deinit
KEY_Open
KEY_Close
KEY_Read
KEY_Write
KEY_Seek
KEY_IOControl
KEY_PowerDown
KEY_PowerUp
Makefile：
!INCLUDE $(_MAKEENVROOT)/makefile.def
4.修改整体项目的配置文件，以便加入我们的驱动到系统中
（1）。platform.bib文件：添加如下一句到文件的合适位置
MyKey.dll $(_FLATRELEASEDIR)/MyKey.dll NK SHK
（2）。Platform.reg注册表文件：添加如下
[HKEY_LOCAL_MACHINE/Drivers/BuiltIn/MyKey]
"Prefix"="KEY"
"DLL"="MyKey.dll"
"Order"=dword:4
"Index"=dword:1
（3）。修改上层目录的Dirs文件，根据需要添加如下一句：
DIRS=/
DrvLib/
. . .
WIFI_SDIO/
MyKey 注：这是添加到此文件的内容。
5.编译建立此驱动。注意：这里只需要编译驱动目录就可以了，不需要重新编译整个系统。
：