649 lines
21 KiB
C
649 lines
21 KiB
C
|
/*
|
||
|
|
************************************************************************************************************************
|
||
|
|
* File : cpu_port.c
|
||
|
|
* By : xyou
|
||
|
|
* Version : V1.00.00
|
||
|
|
*
|
||
|
|
* By : prife
|
||
|
|
* Version : V1.00.01
|
||
|
|
************************************************************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* INCLUDE FILES
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
#include <rtthread.h>
|
||
|
|
#include <windows.h>
|
||
|
|
#include <mmsystem.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "cpu_port.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* WinThread STRUCTURE
|
||
|
|
* Windows runs each task in a thread.
|
||
|
|
* The context switch is managed by the threads.So the task stack does not have to be managed directly,
|
||
|
|
* although the stack stack is still used to hold an WinThreadState structure this is the only thing it
|
||
|
|
* will be ever hold.
|
||
|
|
* the structure indirectly maps the task handle to a thread handle
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
void *Param; //Thread param
|
||
|
|
void (*Entry)(void *); //Thread entry
|
||
|
|
void (*Exit)(void); //Thread exit
|
||
|
|
HANDLE ThreadHandle;
|
||
|
|
DWORD ThreadID;
|
||
|
|
}win_thread_t;
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* LOCAL DEFINES
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
#define MAX_INTERRUPT_NUM ((rt_uint32_t)sizeof(rt_uint32_t) * 8)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Simulated interrupt waiting to be processed.this is a bit mask where each bit represent one interrupt
|
||
|
|
* so a maximum of 32 interrupts can be simulated
|
||
|
|
*/
|
||
|
|
static volatile rt_uint32_t CpuPendingInterrupts = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* An event used to inform the simulated interrupt processing thread (a high priority thread
|
||
|
|
* that simulated interrupt processing) that an interrupt is pending
|
||
|
|
*/
|
||
|
|
static HANDLE hInterruptEventHandle = NULL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Mutex used to protect all the simulated interrupt variables that are accessed by multiple threads
|
||
|
|
*/
|
||
|
|
static HANDLE hInterruptEventMutex = NULL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Handler for all the simulate software interrupts.
|
||
|
|
* The first two positions are used the Yield and Tick interrupt so are handled slightly differently
|
||
|
|
* all the other interrupts can be user defined
|
||
|
|
*/
|
||
|
|
static rt_uint32_t (*CpuIsrHandler[MAX_INTERRUPT_NUM])(void) = {0};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Handler for OSTick Thread
|
||
|
|
*/
|
||
|
|
static HANDLE OSTick_Thread;
|
||
|
|
static DWORD OSTick_ThreadID;
|
||
|
|
static HANDLE OSTick_SignalPtr;
|
||
|
|
static TIMECAPS OSTick_TimerCap;
|
||
|
|
static MMRESULT OSTick_TimerID;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* flag in interrupt handling
|
||
|
|
*/
|
||
|
|
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
|
||
|
|
rt_uint32_t rt_thread_switch_interrupt_flag;
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* PRIVATE FUNCTION PROTOTYPES
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
//static void WinThreadScheduler(void);
|
||
|
|
void WinThreadScheduler(void);
|
||
|
|
rt_uint32_t YieldInterruptHandle(void);
|
||
|
|
rt_uint32_t SysTickInterruptHandle(void);
|
||
|
|
static DWORD WINAPI ThreadforSysTickTimer(LPVOID lpParam);
|
||
|
|
static DWORD WINAPI ThreadforKeyGet(LPVOID lpParam);
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* rt_hw_stack_init()
|
||
|
|
* Description : Initialize stack of thread
|
||
|
|
* Argument(s) : void *pvEntry,void *pvParam,rt_uint8_t *pStackAddr,void *pvExit
|
||
|
|
* Return(s) : rt_uint8_t*
|
||
|
|
* Caller(s) : rt_thread_init or rt_thread_create
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
static DWORD WINAPI thread_run( LPVOID lpThreadParameter )
|
||
|
|
{
|
||
|
|
win_thread_t *pWinThread = (win_thread_t *)lpThreadParameter;
|
||
|
|
pWinThread->Entry(pWinThread->Param);
|
||
|
|
|
||
|
|
printf("thread %x exit\n", pWinThread->ThreadID);
|
||
|
|
pWinThread->Exit();
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_uint8_t* rt_hw_stack_init(void *pEntry,void *pParam,rt_uint8_t *pStackAddr,void *pExit)
|
||
|
|
{
|
||
|
|
win_thread_t *pWinThread = NULL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* In this simulated case a stack is not initialized
|
||
|
|
* The thread handles the context switching itself. The WinThreadState object is placed onto the stack
|
||
|
|
* that was created for the task
|
||
|
|
* so the stack buffer is still used,just not in the conventional way.
|
||
|
|
*/
|
||
|
|
pWinThread = (win_thread_t *)(pStackAddr - sizeof(win_thread_t));
|
||
|
|
|
||
|
|
pWinThread->Entry = pEntry;
|
||
|
|
pWinThread->Param = pParam;
|
||
|
|
pWinThread->Exit = pExit;
|
||
|
|
|
||
|
|
pWinThread->ThreadHandle = NULL;
|
||
|
|
pWinThread->ThreadID = 0;
|
||
|
|
|
||
|
|
/* Create the winthread */
|
||
|
|
pWinThread->ThreadHandle = CreateThread(NULL,
|
||
|
|
0,
|
||
|
|
(LPTHREAD_START_ROUTINE) thread_run,
|
||
|
|
pWinThread,
|
||
|
|
CREATE_SUSPENDED,
|
||
|
|
&(pWinThread->ThreadID));
|
||
|
|
SetThreadAffinityMask(pWinThread->ThreadHandle,
|
||
|
|
0x01);
|
||
|
|
SetThreadPriorityBoost(pWinThread->ThreadHandle,
|
||
|
|
TRUE);
|
||
|
|
SetThreadPriority(pWinThread->ThreadHandle,
|
||
|
|
THREAD_PRIORITY_IDLE);
|
||
|
|
|
||
|
|
return (rt_uint8_t*)pWinThread;
|
||
|
|
} /*** rt_hw_stack_init ***/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* rt_hw_interrupt_disable()
|
||
|
|
* Description : disable cpu interrupts
|
||
|
|
* Argument(s) : void
|
||
|
|
* Return(s) : rt_base_t
|
||
|
|
* Caller(s) : Applicatios or os_kernel
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
rt_base_t rt_hw_interrupt_disable(void)
|
||
|
|
{
|
||
|
|
if(hInterruptEventMutex != NULL)
|
||
|
|
{
|
||
|
|
WaitForSingleObject(hInterruptEventMutex,INFINITE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
} /*** rt_hw_interrupt_disable ***/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* rt_hw_interrupt_enable()
|
||
|
|
* Description : enable cpu interrupts
|
||
|
|
* Argument(s) : rt_base_t level
|
||
|
|
* Return(s) : void
|
||
|
|
* Caller(s) : Applications or os_kernel
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
void rt_hw_interrupt_enable(rt_base_t level)
|
||
|
|
{
|
||
|
|
level = level;
|
||
|
|
|
||
|
|
if (hInterruptEventMutex != NULL)
|
||
|
|
{
|
||
|
|
ReleaseMutex(hInterruptEventMutex);
|
||
|
|
}
|
||
|
|
|
||
|
|
} /*** rt_hw_interrupt_enable ***/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* rt_hw_context_switch_interrupt()
|
||
|
|
* Description : switch thread's contex
|
||
|
|
* Argument(s) : void
|
||
|
|
* Return(s) : void
|
||
|
|
* Caller(s) : os kernel
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
void rt_hw_context_switch_interrupt(rt_uint32_t from,
|
||
|
|
rt_uint32_t to)
|
||
|
|
{
|
||
|
|
if(rt_thread_switch_interrupt_flag != 1)
|
||
|
|
{
|
||
|
|
rt_thread_switch_interrupt_flag = 1;
|
||
|
|
|
||
|
|
// set rt_interrupt_from_thread
|
||
|
|
rt_interrupt_from_thread = *((rt_uint32_t *)(from));
|
||
|
|
}
|
||
|
|
|
||
|
|
rt_interrupt_to_thread = *((rt_uint32_t *)(to));
|
||
|
|
|
||
|
|
//trigger YIELD exception(cause contex switch)
|
||
|
|
TriggerSimulateInterrupt(CPU_INTERRUPT_YIELD);
|
||
|
|
} /*** rt_hw_context_switch_interrupt ***/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
void rt_hw_context_switch(rt_uint32_t from,
|
||
|
|
rt_uint32_t to)
|
||
|
|
{
|
||
|
|
if(rt_thread_switch_interrupt_flag != 1)
|
||
|
|
{
|
||
|
|
rt_thread_switch_interrupt_flag = 1;
|
||
|
|
|
||
|
|
// set rt_interrupt_from_thread
|
||
|
|
rt_interrupt_from_thread = *((rt_uint32_t *)(from));
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// set rt_interrupt_to_thread
|
||
|
|
rt_interrupt_to_thread = *((rt_uint32_t *)(to));
|
||
|
|
|
||
|
|
//trigger YIELD exception(cause contex switch)
|
||
|
|
TriggerSimulateInterrupt(CPU_INTERRUPT_YIELD);
|
||
|
|
|
||
|
|
} /*** rt_hw_context_switch ***/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* rt_hw_context_switch_to()
|
||
|
|
* Description : switch to new thread
|
||
|
|
* Argument(s) : rt_uint32_t to //the stack address of the thread which will switch to
|
||
|
|
* Return(s) : void
|
||
|
|
* Caller(s) : rt_thread schecale
|
||
|
|
* Note(s) : this function is used to perform the first thread switch
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
void rt_hw_context_switch_to(rt_uint32_t to)
|
||
|
|
{
|
||
|
|
//set to thread
|
||
|
|
rt_interrupt_to_thread = *((rt_uint32_t *)(to));
|
||
|
|
|
||
|
|
//clear from thread
|
||
|
|
rt_interrupt_from_thread = 0;
|
||
|
|
|
||
|
|
//set interrupt to 1
|
||
|
|
rt_thread_switch_interrupt_flag = 1;
|
||
|
|
|
||
|
|
//start WinThreadScheduler
|
||
|
|
WinThreadScheduler();
|
||
|
|
|
||
|
|
//never reach here!
|
||
|
|
return;
|
||
|
|
|
||
|
|
} /*** rt_hw_context_switch_to ***/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* TriggerSimulateInterrupt()
|
||
|
|
* Description : Trigger a simulated interrupts handle
|
||
|
|
* Argument(s) : t_uint32_t IntIndex
|
||
|
|
* Return(s) : void
|
||
|
|
* Caller(s) : Applications
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
void TriggerSimulateInterrupt(rt_uint32_t IntIndex)
|
||
|
|
{
|
||
|
|
if((IntIndex < MAX_INTERRUPT_NUM) && (hInterruptEventMutex != NULL))
|
||
|
|
{
|
||
|
|
/* Yield interrupts are processed even when critical nesting is non-zero */
|
||
|
|
WaitForSingleObject(hInterruptEventMutex,
|
||
|
|
INFINITE);
|
||
|
|
|
||
|
|
CpuPendingInterrupts |= (1 << IntIndex);
|
||
|
|
|
||
|
|
SetEvent(hInterruptEventHandle);
|
||
|
|
|
||
|
|
ReleaseMutex(hInterruptEventMutex);
|
||
|
|
}
|
||
|
|
} /*** TriggerSimulateInterrupt ***/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* RegisterSimulateInterrupt()
|
||
|
|
* Description : Register a interrupt handle to simulate paltform
|
||
|
|
* Argument(s) : rt_uint32_t IntIndex,rt_uint32_t (*IntHandler)(void)
|
||
|
|
* Return(s) : void
|
||
|
|
* Caller(s) : Applications
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
void RegisterSimulateInterrupt(rt_uint32_t IntIndex,rt_uint32_t (*IntHandler)(void))
|
||
|
|
{
|
||
|
|
if(IntIndex < MAX_INTERRUPT_NUM)
|
||
|
|
{
|
||
|
|
if (hInterruptEventMutex != NULL)
|
||
|
|
{
|
||
|
|
WaitForSingleObject(hInterruptEventMutex,
|
||
|
|
INFINITE);
|
||
|
|
|
||
|
|
CpuIsrHandler[IntIndex] = IntHandler;
|
||
|
|
|
||
|
|
ReleaseMutex(hInterruptEventMutex);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
CpuIsrHandler[IntIndex] = IntHandler;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} /*** RegisterSimulateInterrupt ***/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* PRIVATE FUNCTION
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* WinThreadScheduler()
|
||
|
|
* Description : Handle all simulate interrupts
|
||
|
|
* Argument(s) : void
|
||
|
|
* Return(s) : static void
|
||
|
|
* Caller(s) : os scachle
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
#define WIN_WM_MIN_RES (1)
|
||
|
|
void WinThreadScheduler(void)
|
||
|
|
{
|
||
|
|
HANDLE hInterruptObjectList[2];
|
||
|
|
HANDLE hThreadHandle;
|
||
|
|
rt_uint32_t SwitchRequiredMask;
|
||
|
|
rt_uint32_t i;
|
||
|
|
|
||
|
|
win_thread_t *WinThreadFrom;
|
||
|
|
win_thread_t *WinThreadTo;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Install the interrupt handlers used bye scheduler itself
|
||
|
|
*/
|
||
|
|
RegisterSimulateInterrupt(CPU_INTERRUPT_YIELD,
|
||
|
|
YieldInterruptHandle);
|
||
|
|
RegisterSimulateInterrupt(CPU_INTERRUPT_TICK,
|
||
|
|
SysTickInterruptHandle);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Create the events and mutex that are used to synchronise all the WinThreads
|
||
|
|
*/
|
||
|
|
hInterruptEventMutex = CreateMutex(NULL,
|
||
|
|
FALSE,
|
||
|
|
NULL);
|
||
|
|
hInterruptEventHandle = CreateEvent(NULL,
|
||
|
|
FALSE,
|
||
|
|
FALSE,
|
||
|
|
NULL);
|
||
|
|
|
||
|
|
if((hInterruptEventMutex == NULL) || (hInterruptEventHandle == NULL))
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set the priority of this WinThread such that it is above the priority of the WinThreads
|
||
|
|
* that run rt-threads.
|
||
|
|
* This is higher priority is required to ensure simulate interrupts take priority over rt-threads
|
||
|
|
*/
|
||
|
|
hThreadHandle = GetCurrentThread();
|
||
|
|
if(hThreadHandle == NULL)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (SetThreadPriority(hThreadHandle,
|
||
|
|
THREAD_PRIORITY_HIGHEST) == 0)
|
||
|
|
{
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
SetThreadPriorityBoost(hThreadHandle,
|
||
|
|
TRUE);
|
||
|
|
SetThreadAffinityMask(hThreadHandle,
|
||
|
|
0x01);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Start the thread that simulates the timer peripheral to generate tick interrupts.
|
||
|
|
*/
|
||
|
|
OSTick_Thread = CreateThread(NULL,
|
||
|
|
0,
|
||
|
|
ThreadforSysTickTimer,
|
||
|
|
0,
|
||
|
|
CREATE_SUSPENDED,
|
||
|
|
&OSTick_ThreadID);
|
||
|
|
if(OSTick_Thread == NULL)
|
||
|
|
{
|
||
|
|
//Display Error Message
|
||
|
|
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
SetThreadPriority(OSTick_Thread,
|
||
|
|
THREAD_PRIORITY_NORMAL);
|
||
|
|
SetThreadPriorityBoost(OSTick_Thread,
|
||
|
|
TRUE);
|
||
|
|
SetThreadAffinityMask(OSTick_Thread,
|
||
|
|
0x01);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set timer Caps
|
||
|
|
*/
|
||
|
|
if (timeGetDevCaps(&OSTick_TimerCap,
|
||
|
|
sizeof(OSTick_TimerCap)) != TIMERR_NOERROR)
|
||
|
|
{
|
||
|
|
|
||
|
|
CloseHandle(OSTick_Thread);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (OSTick_TimerCap.wPeriodMin < WIN_WM_MIN_RES)
|
||
|
|
{
|
||
|
|
OSTick_TimerCap.wPeriodMin = WIN_WM_MIN_RES;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(timeBeginPeriod(OSTick_TimerCap.wPeriodMin) != TIMERR_NOERROR)
|
||
|
|
{
|
||
|
|
CloseHandle(OSTick_Thread);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
OSTick_SignalPtr = CreateEvent(NULL,TRUE,FALSE,NULL);
|
||
|
|
if(OSTick_SignalPtr == NULL)
|
||
|
|
{
|
||
|
|
// disp error message
|
||
|
|
|
||
|
|
timeEndPeriod(OSTick_TimerCap.wPeriodMin);
|
||
|
|
CloseHandle(OSTick_Thread);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
OSTick_TimerID = timeSetEvent((UINT ) (1000 / RT_TICK_PER_SECOND) ,
|
||
|
|
(UINT ) OSTick_TimerCap.wPeriodMin,
|
||
|
|
(LPTIMECALLBACK ) OSTick_SignalPtr,
|
||
|
|
(DWORD_PTR ) NULL,
|
||
|
|
(UINT ) (TIME_PERIODIC | TIME_CALLBACK_EVENT_SET));
|
||
|
|
|
||
|
|
if(OSTick_TimerID == 0)
|
||
|
|
{
|
||
|
|
//disp
|
||
|
|
|
||
|
|
CloseHandle(OSTick_SignalPtr);
|
||
|
|
timeEndPeriod(OSTick_TimerCap.wPeriodMin);
|
||
|
|
CloseHandle(OSTick_Thread);
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Start OS Tick Thread an release Interrupt Mutex
|
||
|
|
*/
|
||
|
|
ResumeThread(OSTick_Thread);
|
||
|
|
ReleaseMutex( hInterruptEventMutex );
|
||
|
|
|
||
|
|
//trigger YEILD INTERRUPT
|
||
|
|
TriggerSimulateInterrupt(CPU_INTERRUPT_YIELD);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* block on the mutex that ensure exclusive access to the simulated interrupt objects
|
||
|
|
* and the events that signals that a simulated interrupt should be processed.
|
||
|
|
*/
|
||
|
|
|
||
|
|
hInterruptObjectList[0] = hInterruptEventHandle;
|
||
|
|
hInterruptObjectList[1] = hInterruptEventMutex;
|
||
|
|
|
||
|
|
|
||
|
|
while (1)
|
||
|
|
{
|
||
|
|
WaitForMultipleObjects(sizeof(hInterruptObjectList) / sizeof(HANDLE),
|
||
|
|
hInterruptObjectList,
|
||
|
|
TRUE,
|
||
|
|
INFINITE);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Used to indicate whether the simulate interrupt processing has necessitated a contex
|
||
|
|
* switch to another thread
|
||
|
|
*/
|
||
|
|
SwitchRequiredMask = 0;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For each interrupt we are interested in processing ,each of which is represented
|
||
|
|
* by a bit in the 32bit CpuPendingInterrupts variable.
|
||
|
|
*/
|
||
|
|
for (i = 0; i < MAX_INTERRUPT_NUM; ++i)
|
||
|
|
{
|
||
|
|
/* is the simulated interrupt pending ? */
|
||
|
|
if (CpuPendingInterrupts & (1UL << i))
|
||
|
|
{
|
||
|
|
/* Is a handler installed ?*/
|
||
|
|
if (CpuIsrHandler[i] != NULL)
|
||
|
|
{
|
||
|
|
/* Run the actual handler */
|
||
|
|
if (CpuIsrHandler[i]() != 0)
|
||
|
|
{
|
||
|
|
SwitchRequiredMask |= (1UL << i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Clear the interrupt pending bit */
|
||
|
|
CpuPendingInterrupts &= ~(1UL << i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(SwitchRequiredMask != 0)
|
||
|
|
{
|
||
|
|
WinThreadFrom = (win_thread_t *)rt_interrupt_from_thread;
|
||
|
|
WinThreadTo = (win_thread_t *)rt_interrupt_to_thread;
|
||
|
|
|
||
|
|
if ((WinThreadFrom != NULL) && (WinThreadFrom->ThreadHandle != NULL))
|
||
|
|
{
|
||
|
|
SuspendThread(WinThreadFrom->ThreadHandle);
|
||
|
|
}
|
||
|
|
|
||
|
|
ResumeThread(WinThreadTo->ThreadHandle);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
ReleaseMutex(hInterruptEventMutex);
|
||
|
|
}
|
||
|
|
} /*** WinThreadScheduler ***/
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* ThreadforSysTickTimer()
|
||
|
|
* Description : win thread to simulate a systick timer
|
||
|
|
* Argument(s) : LPVOID lpParam
|
||
|
|
* Return(s) : static DWORD WINAPI
|
||
|
|
* Caller(s) : none
|
||
|
|
* Note(s) : This is not a real time way of generating tick events as the next wake time should be relative
|
||
|
|
* to the previous wake time,not the time Sleep() is called.
|
||
|
|
* It is done this way to prevent overruns in this very non real time simulated/emulated environment
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
static DWORD WINAPI ThreadforSysTickTimer(LPVOID lpParam)
|
||
|
|
{
|
||
|
|
|
||
|
|
(void)lpParam; //prevent compiler warnings
|
||
|
|
|
||
|
|
for(;;)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Wait until the timer expires and we can access the simulated interrupt variables.
|
||
|
|
*/
|
||
|
|
WaitForSingleObject(OSTick_SignalPtr,INFINITE);
|
||
|
|
|
||
|
|
ResetEvent(OSTick_SignalPtr);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Trigger a systick interrupt
|
||
|
|
*/
|
||
|
|
TriggerSimulateInterrupt(CPU_INTERRUPT_TICK);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
} /*** prvThreadforSysTickTimer ***/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* SysTickInterruptHandle()
|
||
|
|
* Description : Interrupt handle for systick
|
||
|
|
* Argument(s) : void
|
||
|
|
* Return(s) : rt_uint32_t
|
||
|
|
* Caller(s) : none
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
rt_uint32_t SysTickInterruptHandle(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
/* enter interrupt */
|
||
|
|
rt_interrupt_enter();
|
||
|
|
|
||
|
|
rt_tick_increase();
|
||
|
|
|
||
|
|
/* leave interrupt */
|
||
|
|
rt_interrupt_leave();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
} /*** SysTickInterruptHandle ***/
|
||
|
|
|
||
|
|
/*
|
||
|
|
*********************************************************************************************************
|
||
|
|
* YieldInterruptHandle()
|
||
|
|
* Description : Interrupt handle for Yield
|
||
|
|
* Argument(s) : void
|
||
|
|
* Return(s) : rt_uint32_t
|
||
|
|
* Caller(s) : none
|
||
|
|
* Note(s) : none
|
||
|
|
*********************************************************************************************************
|
||
|
|
*/
|
||
|
|
rt_uint32_t YieldInterruptHandle(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
/*
|
||
|
|
* if rt_thread_switch_interrupt_flag = 1 yield already handled
|
||
|
|
*/
|
||
|
|
if(rt_thread_switch_interrupt_flag != 0)
|
||
|
|
{
|
||
|
|
rt_thread_switch_interrupt_flag = 0;
|
||
|
|
|
||
|
|
/* return thread switch request = 1 */
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
} /*** YieldInterruptHandle ***/
|