[求助]mc68376编程的问题:不能调用子函数

函数, 求助

我刚开始学习32位单片机的编程,mc68376.结果程序不能调用子程序,把子程序的代码写在main()函数里就可以执行.比如我想调用延时子程序:delay()

void delay(void);

void main(void)
{
//系统初始化开始,初始化CPU,外部rom,ram,片选
asm(" ORI.W #$2700,SR");
asm(" MOVEA.L #$111e00,A7");
SIMCR=0x60CF;

    SYNCR=0x7F00;
     SYPCR=0xD0;
    CSBARBT=0x0003;
    CSBAR0=0x1003;
    CSBAR1=0x1003;
    CSPAR0=0x00FF;
    CSPAR1=0x0000;
    CSORBT=0x68B0;
    CSOR0=0x3830;
    CSOR1=0x5830;
    ICR=0x0446;
    PITR=0x0052;
    PEPAR=0x00;
    DDRE=0x1F;
     PORTE0=0x00;
    FPAR=0x00;
     DDRF=0x00;
     PORTF0=0x00;
    RAMBAH=0x0011;
   RAMBAL=0x0000;
    RAMMCR=0x0A00;//系统初始化结束

delay();//调用子程序,想在这里延时

while(1){

//依次点亮led

PORTC=0x70;
ORTE0=0x00;
for(i=0;i<50000;i++)
asm(" NOP ");
ORTC=0x68;
for(i=0;i<50000;i++)
asm(" NOP ");
ORTC=0x58;
for(i=0;i<50000;i++)
asm(" NOP ");
PORTC=0x38;
for(i=0;i<50000;i++)
asm(" NOP ");

}

void delay(void)
{

asm(" NOP ");

}

在程序里只要调用delay()函数时程序就不向下执行,停在这个地方.搞不明白这是什么原因?

编译后生成的汇编文件:

_main:
?file ./reg.h
?endf
?file ./vec.h
?endf
?file C:\MGC\embedded\include\mcc68k/stdlib.h
?endf
?file C:\MGC\embedded\include\mcc68k/stddef.h
?endf
?file C:\MGC\embedded\include\mcc68k/string.h
?endf
?file C:\MGC\embedded\include\mcc68k/float.h
?endf
ORI.W #$2700,SR

MOVEA.L #$111e00,A7

move.w #24783,16775680
  move.w #32512,16775684
clr.b 16775713
  move.w #3,16775752
  move.w #4099,16775756
  move.w #4099,16775760
  move.w #255,16775748
  clr.w 16775750

move.w #26800,16775754
move.w #14384,16775758
  move.w #22576,16775762
  clr.b 16775745

move.w #1094,16775714

move.w #82,16775716
  clr.b 16775703
  move.b #255,16775701
  clr.b 16775697
  clr.b 16775711

clr.b 16775709

clr.b 16775705

move.w #17,16776004

clr.w 16776006

move.w #2560,16776000

move.w #37824,16775200

move.w #32899,16773632
move.w #32899,16776192

move.w #39680,16774144

move.w #32899,16776704

move.w #33024,16775936

move.w #55680,16773248

jsr _delay

L1:
move.b #112,16775745

clr.l _i
bra.w L5

L4:
NOP

addq.l #1,_i

L5:
cmpi.l #50000,_i
bcs.s L4

move.b #104,16775745

clr.l _i
bra.w L9

L8:
NOP

addq.l #1,_i

L9:
cmpi.l #50000,_i
bcs.s L8

move.b #88,16775745

clr.l _i
bra.w L13

L12:
NOP

addq.l #1,_i

L13:
cmpi.l #50000,_i
bcs.s L12

move.b #56,16775745

clr.l _i
bra.w L17

L16:
NOP

addq.l #1,_i

L17:
cmpi.l #50000,_i
bcs.s L16
bra.w L1

rts
; code: 378 + asm() bytes   stack: 0 bytes
?end