main.c

2812的流水灯程序

/*********************************************************************
**	Module Name:		EvTimer 				    				**
**	Author:				Cbq  			    						**
**	Version:			1.0			    							**
**	CreateDate:			2008-05-15		    						**
**	Description:		            			    				**
**	Remark:				Huozq		    							**
**	Revision History:	2008-11-10			    					**
**  Web:                http://www.study-kit.com                    **
**********************************************************************/

/*********************************************************************
**	实验目的:了解事件管理器的定时器的应用,大家在学习时要结合第四章  **
**	         的事件管理器来进行                                     **
**	实验说明:这里我们只使用了EvaTimer1来控制LED灯的亮灭,你在学习中  **
**	         可通过它来了解EV的定时器工作原理,对以后做电机之类的控  **
**	         制时可以引用部分函数                                   **
**	实验结果:可看到板上8个发光二极管产生流水灯的效果                **
**********************************************************************/

#include "DSP28_Device.h"
#include "DSP28_Globalprototypes.h"


unsigned  int  *Led8  = (unsigned int *)0x4100;    //LED 控制寄存器

const	Uint16	LedCode[]={0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0xFE,0xFF};

// Prototype statements for functions found within this file.
interrupt void eva_timer1_isr(void);
interrupt void eva_timer2_isr(void);
interrupt void evb_timer3_isr(void);
interrupt void evb_timer4_isr(void);

// Global counts used in this example
Uint32	EvaTimer1InterruptCount;
Uint32  EvaTimer2InterruptCount;
Uint32	EvbTimer3InterruptCount;
Uint32  EvbTimer4InterruptCount;

Uint16	LedCount = 0;


void main(void)
{

	/*初始化系统*/
	InitSysCtrl();

	/*关中断*/
	DINT;
	IER = 0x0000;
	IFR = 0x0000;
	/*初始化PIE*/
	InitPieCtrl();

	/*初始化PIE中断矢量表*/
	InitPieVectTable();	
	
	/*初始化外设*/
    InitPeripherals();

    /*初始化GPIO*/
	InitGpio();
	
	InitXIntrupt();
	
	EALLOW;	// This is needed to write to EALLOW protected registers
	PieVectTable.T1PINT = &eva_timer1_isr;
	PieVectTable.T2PINT = &eva_timer2_isr;
	PieVectTable.T3PINT = &evb_timer3_isr;
	PieVectTable.T4PINT = &evb_timer4_isr;
	EDIS;   // This is needed to disable write to EALLOW protected registers

    // Enable PIE group 2 interrupt 4 for T1PINT
    PieCtrl.PIEIER2.all = M_INT4;
    // Enable PIE group 3 interrupt 1 for T2PINT
    PieCtrl.PIEIER3.all = M_INT1;    
    // Enable PIE group 4 interrupt 4 for T3PINT
    PieCtrl.PIEIER4.all = M_INT4;
    // Enable PIE group 5 interrupt 1 for T4PINT
    PieCtrl.PIEIER5.all = M_INT1;
	
    // Enable CPU INT2 for T1PINT, INT3 for T2PINT, INT4 for T3PINT
    // and INT5 for T4PINT:
	IER |= (M_INT2 | M_INT3 | M_INT4 | M_INT5);

    // Enable global Interrupts and higher priority real-time debug events:
	
	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM

	// Step 6. IDLE loop. Just sit and loop forever:	
	for(;;);

} 	


	// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:	
	// If local ISRs are used, reassign vector addresses in vector table as
    // shown in Step 5
    
/*这里的配置需参照课本第四章的事件管理器的中断寄存器的设置*/
interrupt void eva_timer1_isr(void)
{
	EvaTimer1InterruptCount++;///EV中断计数累加

    // Enable more interrupts from this timer
	EvaRegs.EVAIMRA.bit.T1PINT = 1;////EVA的中断屏蔽寄存器的通用定时器1的周
	                               ////期中断位使能
	
	// Note: To be safe, use a mask value to write to the entire
	// EVAIFRA register.  Writing to one bit will cause a read-modify-write
	// operation that may have the result of writing 1's to clear 
	// bits other then those intended. 
    EvaRegs.EVAIFRA.all = BIT7;
	// Acknowledge interrupt to recieve more interrupts from PIE group 2
	PieCtrl.PIEACK.all = PIEACK_GROUP2;////响应中断组
	
	/*下面就是我们写进去的数据给CPLD来控制LED的亮灭*/
	*Led8 = LedCode[8-LedCount];
	LedCount++;
	if (LedCount>8)	LedCount = 0;	
}

interrupt void eva_timer2_isr(void)
{
	EvaTimer2InterruptCount++;

    // Enable more interrupts from this timer
	EvaRegs.EVAIMRB.bit.T2PINT = 1;
	
	// Note: To be safe, use a mask value to write to the entire
	// EVAIFRB register.  Writing to one bit will cause a read-modify-write
	// operation that may have the result of writing 1's to clear 
	// bits other then those intended. 
    EvaRegs.EVAIFRB.all = BIT0;
	
	// Acknowledge interrupt to recieve more interrupts from PIE group 3
	PieCtrl.PIEACK.all = PIEACK_GROUP3;

}

interrupt void evb_timer3_isr(void)
{
	EvbTimer3InterruptCount++;
	
	// Note: To be safe, use a mask value to write to the entire
	// EVBIFRA register.  Writing to one bit will cause a read-modify-write
	// operation that may have the result of writing 1's to clear 
	// bits other then those intended. 
    EvbRegs.EVBIFRA.all = BIT7;	
	
	// Acknowledge interrupt to recieve more interrupts from PIE group 4
	PieCtrl.PIEACK.all = PIEACK_GROUP4;

}

interrupt void evb_timer4_isr(void)
{
	EvbTimer4InterruptCount++;
	
	// Note: To be safe, use a mask value to write to the entire
	// EVBIFRB register.  Writing to one bit will cause a read-modify-write
	// operation that may have the result of writing 1's to clear 
	// bits other then those intended. 
    EvbRegs.EVBIFRB.all = BIT0;	
	
	// Acknowledge interrupt to recieve more interrupts from PIE group 5
	PieCtrl.PIEACK.all = PIEACK_GROUP5;

}


void	Delay(Uint16  data)
{
	Uint16	i;
	for (i=0;i<data;i++) { ; }	
}	
		

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// No more.
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