ex1l.c

《uC/os-II 内核分析.移植与驱动程序开发》随书光盘中的全部源代码

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                           All Rights Reserved
*
*                                                 V2.00
*
*                                               EXAMPLE #1
*********************************************************************************************************
*/

#include "includes.h"
#include "DSP28_Device.h"
#include "DSP28_Globalprototypes.h"
#include "os_globalstack.h"
/*
*********************************************************************************************************
*                                               CONSTANTS
*********************************************************************************************************
*/

extern OS_STK  TaskStartStk[TASK_STK_SIZE];
extern OS_STK  TaskStk[N_TASKS][TASK_STK_SIZE];     /* Tasks stacks                                  */



/*
*********************************************************************************************************
*                                           FUNCTION PROTOTYPES
*********************************************************************************************************
*/

void   Task(void *data);                              /* Function prototypes of tasks                  */
void Task1(void *data);
void   TaskStart(void *data);                         /* Function prototypes of Startup task           */
extern void OSTickISR();
void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period);
void InitCpuTimers(void);
struct CPUTIMER_VARS CpuTimer0;
void funcall(int i);
void testasm(int i ,int j,int k);
void OSTickISR();
void OSCtxSw();
/*$PAGE*/
/*
*********************************************************************************************************
*                                                MAIN
*********************************************************************************************************
*/

void main (void)
{
    

    DINT;        
    EALLOW;	// This is needed to write to EALLOW protected registers
    InitSysCtrl();    
    InitPieVectTable();	
    InitPieCtrl();    
    EDIS;   	
	
    OSInit();                                              /* Initialize uC/OS-II                      */            
    OSTaskCreate(TaskStart, (void *)0, (void *)&TaskStartStk[0], 0);
    OSStart();                                             /* Start multitasking                       */
}

/*$PAGE*/
/*
*********************************************************************************************************
*                                              STARTUP TASK
*********************************************************************************************************
*/
void TaskStart (void *data)
{
    UBYTE  i;    
	
    data = data;                                           /* Prevent compiler warning                 */
    
    
    InitCpuTimers();
    
    
    EALLOW;	// This is needed to write to EALLOW protected registers
    // Enable CPU INT1 which is connected to CPU-Timer 0:
	IER |= M_INT1;	
    // Enable TINT0 in the PIE: Group 1 interrupt 7
    PieVectTable.USER11 = &OSCtxSw;
    
	PieCtrlRegs.PIEIER1.bit.INTx7 = 1;  
	  
	PieVectTable.TINT0 = &OSTickISR;
	EDIS;       // This is needed to disable write to EALLOW protected registers    
    
    
    ConfigCpuTimer(&CpuTimer0, 100, 1000000);	// 100MHz CPU Freq, 1 second Period (in uSeconds)     	
    OSTaskCreate(Task, (void *)0, (void *)&TaskStk[0][0], 10);
    OSTaskCreate(Task1, (void *)0, (void *)&TaskStk[1][0], 12);
    
    StartCpuTimer0();    
    EINT;  
	ERTM;    
    
    for (;;)  {    
    	i = 3;
    	i = 3 +4;        
        OSTimeDly(1);  
    
       }

        
    
}
/*$PAGE*/
/*
*********************************************************************************************************
*                                                  TASKS
*********************************************************************************************************
*/
void Task1(void *data)
{
    UBYTE x1;

    for (;;) {      
      x1 = 3;
          
      OSTimeDly(6);  
      
    }
}


void Task (void *data)
{
    UBYTE x;
    UBYTE y;
    UBYTE err;


    for (;;) {      
      x = 3;
      y = 4;
      x = y;
      y = x ;
        
      OSTimeDly(4);  
      
    }
}

void funcall(int i)
{
	i = i;
}
void testasm(int i ,int j,int k)
{
	i = i;
	j = j;
	k = k;

/*
	int j;
	OSTCBHighRdy->OSTCBStkPtr[15] = 12;
	
	OSTCBHighRdy->OSTCBStkPtr[3] = 4;
	j = OSTCBHighRdy->OSTCBStkPtr[15];
*/	

	
	
}

void SaveSetting()
{

	//OSTCBHighRdy->OSTCBStkPtr[0] = 4;
	//OSTCBHighRdy->OSTCBStkPtr[1] = 8;
	//OSTCBHighRdy->OSTCBStkPtr[2] = 9;
	OSIntNesting++;
	
	
}




// CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
//struct CPUTIMER_VARS CpuTimer1;
//struct CPUTIMER_VARS CpuTimer2;

//---------------------------------------------------------------------------
// InitCpuTimers: 
//---------------------------------------------------------------------------
// This function initializes all three CPU timers to a known state.
//
void InitCpuTimers(void)
{
    // CPU Timer 0
	// Initialize address pointers to respective timer registers:
	CpuTimer0.RegsAddr = &CpuTimer0Regs;
	// Initialize timer period to maximum:	
	CpuTimer0Regs.PRD.all  = 0xFFFFFFFF;
	// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):	
	CpuTimer0Regs.TPR.all  = 0;
	CpuTimer0Regs.TPRH.all = 0;
	// Make sure timer is stopped:
	CpuTimer0Regs.TCR.bit.TSS = 1;
	// Reload all counter register with period value:
	CpuTimer0Regs.TCR.bit.TRB = 1;
	// Reset interrupt counters:
	CpuTimer0.InterruptCount = 0;	             	
	
	
// CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
// Do not use these two timers if you ever plan on integrating 
// DSP-BIOS or another realtime OS. 
//
// For this reason, the code to manipulate these two timers is
// commented out and not used in these examples.

    // Initialize address pointers to respective timer registers:
//	CpuTimer1.RegsAddr = &CpuTimer1Regs;
//	CpuTimer2.RegsAddr = &CpuTimer2Regs;
	// Initialize timer period to maximum:
//	CpuTimer1Regs.PRD.all  = 0xFFFFFFFF;
//	CpuTimer2Regs.PRD.all  = 0xFFFFFFFF;
	// Make sure timers are stopped:
//	CpuTimer1Regs.TCR.bit.TSS = 1;             
//	CpuTimer2Regs.TCR.bit.TSS = 1;             
	// Reload all counter register with period value:
//	CpuTimer1Regs.TCR.bit.TRB = 1;             
//	CpuTimer2Regs.TCR.bit.TRB = 1;             
	// Reset interrupt counters:
//	CpuTimer1.InterruptCount = 0;
//	CpuTimer2.InterruptCount = 0;

}	
	
//---------------------------------------------------------------------------
// ConfigCpuTimer: 
//---------------------------------------------------------------------------
// This function initializes the selected timer to the period specified
// by the "Freq" and "Period" parameters. The "Freq" is entered as "MHz"
// and the period in "uSeconds". The timer is held in the stopped state
// after configuration.
//
void ConfigCpuTimer(struct CPUTIMER_VARS *Timer, float Freq, float Period)
{
	Uint32 	temp;
	
	// Initialize timer period:	
	Timer->CPUFreqInMHz = Freq;
	Timer->PeriodInUSec = Period;
	//temp = (long) (Freq * Period);
	temp = 100000000;
	Timer->RegsAddr->PRD.all = temp;

	// Set pre-scale counter to divide by 1 (SYSCLKOUT):	
	Timer->RegsAddr->TPR.all  = 0;
	Timer->RegsAddr->TPRH.all  = 0;
	
	// Initialize timer control register:
	Timer->RegsAddr->TCR.bit.POL = 0;      // 0 = Pulse Low
	Timer->RegsAddr->TCR.bit.TOG =	0;     // 0 = No Toggle, POL bit defines action
	Timer->RegsAddr->TCR.bit.TSS = 1;      // 1 = Stop timer, 0 = Start/Restart Timer 
	Timer->RegsAddr->TCR.bit.TRB = 1;      // 1 = reload timer
	Timer->RegsAddr->TCR.bit.FRCEN = 0;    // Force output enable (not used)
	Timer->RegsAddr->TCR.bit.PWIDTH = 7;   // 7+1 = 8 SYSCLKOUT cycle pulse width 
	Timer->RegsAddr->TCR.bit.SOFT = 1;
	Timer->RegsAddr->TCR.bit.FREE = 1;     // Timer Free Run
	Timer->RegsAddr->TCR.bit.TIE = 1;      // 0 = Disable/ 1 = Enable Timer Interrupt
	
	// Reset interrupt counter:
	Timer->InterruptCount = 0;
}


void test()
{
//PieCtrlRegs.PIEIER1.bit.INTx7 = 1;  	
	
	int *p;
	//p = OSTCBHighRdy->OSTCBStkPtr;
	
	OSTCBCur->OSTCBStkPtr = p;

}