DSP实验四（DSP的定时器）

DSP实验四（DSP的定时器）

-w
-stack 500
-sysstack 500
-l rts55x.lib

MEMORY 
{
    DARAM:	o=0x100,	l=0x07f00
    VECT :  o=0x0d000,	l=0x100
    DARAM2: o=0x0d100,	l=0x1f00
    SARAM:  o=0x10000,	l=0x30000
    SDRAM:	o=0x40000,	l=0x3e0000
}

SECTIONS
{
    .text:    {} > DARAM 
    .vectors: {} > VECT 
    .trcinit: {} > DARAM 
    .gblinit: {} > DARAM 
     frt:     {} > DARAM 
    
    .cinit:   {} > DARAM 
    .pinit:   {} > DARAM 
    .sysinit: {} > DARAM 
    .bss:     {} > DARAM2 
    .far:     {} > DARAM2 
    .const:   {} > DARAM 
    .switch:  {} > DARAM 
    .sysmem:  {} > DARAM 
    .cio:     {} > DARAM 
    .MEM$obj: {} > DARAM 
    .sysheap: {} > DARAM 
    .sysstack {} > DARAM 
    .stack:   {} > DARAM 
    
}

#include "myapp.h"

// 定义指示灯寄存器地址和寄存器类型
#define LBDS (*((unsigned int *)0x400001))

void INTR_init( void );
void TIMER_init(void);

int nCount;

main()
{
	nCount=0;
	PLL_Init(40);
	SDRAM_init();
	LBDS=0;
	INTR_init();
	TIMER_init();
	while ( 1 )
	{
	}
}

void interrupt Timer()
{
	nCount++; nCount%=16;
	if ( nCount==0 )
		LBDS^=1;
}

void INTR_init( void )
{
	IVPD=0xd0;
	IVPH=0xd0;
	IER0=0x10;
	DBIER0 =0x10;
	IFR0=0xffff;
	asm(" BCLR INTM");

}

void TIMER_init(void)
{
    ioport unsigned int *tim0; 
    ioport unsigned int *prd0; 
    ioport unsigned int *tcr0; 
    ioport unsigned int *prsc0;  
	tim0  =  (unsigned int *)0x1000;
	prd0  =  (unsigned int *)0x1001;
	tcr0  =  (unsigned int *)0x1002;
	prsc0 =  (unsigned int *)0x1003;
   *tcr0 = 0x04f0;
   *tim0 = 0;
   *prd0 = 0xfffff;
   *prsc0 = 2;
   *tcr0 = 0x00e0;
}

;
;  Copyright 2003 by Texas Instruments Incorporated.
;  All rights reserved. Property of Texas Instruments Incorporated.
;  Restricted rights to use, duplicate or disclose this code are
;  granted through contract.
;  
;
; "@(#) DSP/BIOS 4.90.270 06-11-03 (barracuda-m10)"
;
;  ======== vectors.asm ========
;  Plug in the entry point at RESET in the interrupt vector table
;

        .sect ".vectors"

        .ref _c_int00           ; C entry point

        .if (.MNEMONIC)

rsv:                            ; reset vector
        B _c_int00                              ; branch to C entry point
        NOP
        .align 8
nmi:
	.loop 8
	nop
	.endloop
int0:
	.loop 8
	nop
	.endloop
int2:	
	.loop 8
	nop
	.endloop
	.ref _Timer
tint:	
	B _Timer
	nop	
	.align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
	b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
    b $
    nop
    .align 8
	
        .else

rsv:                            ; reset vector
        goto _c_int00                           ; branch to C entry point
        NOP
        .align 8


        .endif