6410 WINCE 驱动中定时器中断问题 请大家帮忙...

[flyingknight]

下面是一个测试源代码. 参考了s3c6410芯片手册和别的系统驱动源码。功能很简单，将Timer0 设置成1Khz的频率，在每次定时器中断后在 IST中对g_nInterruptCount 变量+1, 这个值能被ReadFile读出来.
但是实际上发现Timer中断没起作用, 阻塞在WaitForSingleObject上了.
请帮帮忙看是不是哪步出问题了.

#include <bsp.h>
#include "ADCQueuedDrv.h"
#include <windows.h>
#include <commctrl.h>
#include <s3c6410.h>

// virtual addresses
static volatile S3C6410_PWM_REG	*g_pPWMRegs = NULL;
static volatile S3C6410_VIC_REG	*g_pVIC0Reg = NULL;

static HANDLE	g_hTimerEvent = NULL;
static DWORD	g_dwTimerSysIntr	= 0;
static HANDLE	g_hISTThread	= NULL;
static int g_nInterruptCount = 0;

static DWORD WINAPI TimerIST(PVOID lpParams);

//
// DllMain
//
BOOL APIENTRY DllMain( HANDLE hModule, 
					  DWORD  ul_reason_for_call, 
					  LPVOID lpReserved
					  )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
	case DLL_THREAD_ATTACH:
	case DLL_THREAD_DETACH:
	case DLL_PROCESS_DETACH:
		break;
	}
	return TRUE;
}

//
//
//
static void TimerInitialize()
{
	OutputDebugString(_T("TimerInitialize"));

	// virtual addresses mapping
	PHYSICAL_ADDRESS physicalAddr;
	physicalAddr.QuadPart = S3C6410_BASE_REG_PA_PWM;
	g_pPWMRegs = (volatile S3C6410_PWM_REG*)MmMapIoSpace(physicalAddr, sizeof(S3C6410_PWM_REG), FALSE);
	ASSERTMSG(_T("Failed to mapping PWM physical address."), g_pPWMRegs);

	physicalAddr.QuadPart = S3C6410_BASE_REG_PA_VIC0;
	g_pVIC0Reg = (volatile S3C6410_VIC_REG*)MmMapIoSpace(physicalAddr, sizeof(S3C6410_VIC_REG), FALSE);
	ASSERTMSG(_T("Failed to mapping VIC physical address."), g_pVIC0Reg);

	// g_pVIC0Reg->VICINTENABLE |= 1 << 23;

	// prescaler = 1, divider = 1/4	: resolution = 8.25 Mhz (8250000)
	// PCLK = 66Mhz: interval = 66000000 / 8 / 1000 = 8250
	// PCLK / 8 / 1000 = 8250, 8250000 / 8250 = 1Khz
	g_pPWMRegs->TCFG0 &= ~(0xff << 0);
	g_pPWMRegs->TCFG0 |= (0x01 << 0);
	g_pPWMRegs->TCFG1 &= ~(0x0f << 0);
	g_pPWMRegs->TCFG1 |= (0x02 << 0);
	g_pPWMRegs->TCNTB0 = (S3C6410_PCLK) / 8 / 1000;
	g_pPWMRegs->TCMPB0 = g_pPWMRegs->TCNTB0 >> 1;	// duty cycle: 50%
	g_pPWMRegs->TCON  &= ~(0xff << 8);	// clear control bits.
	g_pPWMRegs->TCON |= ((0x02 | 0x08) << 0);

	UINT32 i = 100;
	while(i--); // delay

	g_pPWMRegs->TCON &= ~(0x02 << 8);	// clear manual update bit

	//create the timer event
	g_hTimerEvent = CreateEvent(NULL, FALSE, FALSE, _T("TE6410_AQD_TIMER"));
	ASSERTMSG(_T("Event TE6410_AQD_TIMER creation failed."), g_hTimerEvent);

	// obtain sysintr values from the OAL for the timer interrupt.
	DWORD dwTimerSysIRQ = IRQ_TIMER0;
	BOOL bRetVal = KernelIoControl(IOCTL_HAL_REQUEST_SYSINTR, &dwTimerSysIRQ, sizeof(DWORD), &g_dwTimerSysIntr, sizeof(DWORD), NULL);
	ASSERTMSG(_T("Failed to request the timer sysintr"), bRetVal);

	// initialize the interrupt.
	bRetVal = InterruptInitialize(g_dwTimerSysIntr, g_hTimerEvent, NULL, 0);
	ASSERTMSG(_T("Unable to initialize timer interrupt."), bRetVal);

	// create the IST
	g_hISTThread = CreateThread(NULL, 0, TimerIST, NULL, 0, NULL);
	ASSERTMSG(_T("Unable to create timer IST."), g_hISTThread);

	InterruptDone(g_dwTimerSysIntr);

	// CeSetThreadPriority(g_hISTThread, 98);	// 21-98
}

//
//
//
static void TimerDeinitialize()
{
	OutputDebugString(_T("TimerDeinitialize"));

	InterruptDisable(g_dwTimerSysIntr);

	CloseHandle(g_hISTThread);
	CloseHandle(g_hTimerEvent);

	// virtual addresses unmapping
	VirtualFree((PVOID)g_pPWMRegs, 0, MEM_RELEASE);
	VirtualFree((PVOID)g_pVIC0Reg, 0, MEM_RELEASE);
}

//
//
//
static DWORD WINAPI TimerIST(PVOID lpParams)
{
	OutputDebugString(_T("TimerIST"));

	for (;;)
	{
		DWORD dwStatus = WaitForSingleObject(g_hTimerEvent, INFINITE);

		// TODO: our jobs
		g_nInterruptCount ++;

		InterruptDone(g_dwTimerSysIntr);
	}

	return 1;
}

//
//
//
static void TimerStart()
{
	g_pPWMRegs->TCON |= (0x01 << 0);
}

//
//
//
static void TimerStop()
{
	g_pPWMRegs->TCON &= ~(0x01 << 0);
}

/**
 *
 */
DWORD AQD_Init(LPCTSTR pContext, LPCVOID lpvBusContext)
{
	OutputDebugString(L"AQD - AQD Init\n");

	TimerInitialize();

	return 1;
}

/**
 *
 */
BOOL AQD_Deinit(DWORD hDeviceContext)
{
	OutputDebugString(L"AQD - AQD Deinit\n");

	TimerDeinitialize();

	return TRUE;
}

/**
 *
 */
DWORD AQD_Open(DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode)
{
	return 1;
}

/**
 *
 */
BOOL AQD_Close(DWORD hOpenContext)
{
	OutputDebugString(L"AQD - AQD Close\n");

	TimerStop();

	return TRUE;
}

/**
 *
 */
DWORD AQD_Read(DWORD hOpenContext, LPVOID pBuffer, DWORD Count)
{
	if (Count < 4)
		return 0;

	*(DWORD*)pBuffer = g_nInterruptCount;

	return 4;
}

/**
 *
 */
DWORD AQD_Write(DWORD hOpenContext, LPCVOID pBuffer, DWORD Count)
{
	return 1;
} 

/**
 *
 */
VOID AQD_PowerUp(DWORD hDeviceContext)
{
}

/**
 *
 */
VOID AQD_PowerDown(DWORD hDeviceContext)
{
}

/**
 *
 */
DWORD AQD_Seek(DWORD hOpenContext, long Amount, DWORD Type)
{
	return 0;
}

/**
 *
 */
BOOL AQD_IOControl(DWORD Handle,
				   DWORD dwIoControlCode,
				   PBYTE pInBuf,
				   DWORD nInBufSize,
				   PBYTE pOutBuf,
				   DWORD nOutBufSize,
				   PDWORD pBytesReturned)
{
	switch (dwIoControlCode)
	{
	case IOCTL_AQD_START:
		TimerStart();
		break;
	case IOCTL_AQD_STOP:
		TimerStop();
		break;
	default:
		break;
	}
	return TRUE;
}

[91program]

事件 g_hTimerEvent 是在哪里被触发的呢？

[flyingknight]

在第83行 bRetVal = InterruptInitialize(g_dwTimerSysIntr, g_hTimerEvent, NULL, 0); 将该event对象和IRQ_TIMER0中断进行关联.

[别以为你站在珠峰就能看到全世界]

硬件是否能看到中断信号?

[paul_chao]

Timer 沒有 Enable. Paul, Chao @ Techware

[flyingknight]

请问下有相关的代码例子启用中断的吗？谢谢...