dsp执行RET指令后程序指针跳转到空白段

只看该作者 · 2012-2-24 20:34

我写了个控制GPIO的代码，就是控制灯闪烁，可是调用子程序后就回不来了，PC指针跳到空白段去了，PC指针的当前值显示为0，各位大虾帮忙看看，小弟感激不尽，我用的是5509的片子
         .title  "gpio.asm"
         .mmregs
         .def  CodeStart
.stack .usect  ".stack",100h
IODIR .set  3400h             ;IODIR的地址为0x3400
IODATA .set  3401h             ;IODATA的地址为0x3401

         .text
CodeStart:

         MOV #0ffh,port(#IODIR)       ;将gpio配置为输出
LOOP0:  MOV #000h,port(#IODATA) ;gpio输出全0，灯亮
         CALL DELAY1                      ;延时
         MOV #0FFh,port(#IODATA) ;gpio输出全1，灯灭
         CALL DELAY1                      ;延时
         B       LOOP0                         ;跳转到LOOP0
DELAY1:
         MOV #999,AR0
         MOV #499,AR1
LOOP1:  BANZ LOOP1,*AR1-                ;如果AR1不等于0，跳转到LOOP1
LOOP2:  BANZ LOOP2,*AR0-                ;如果AR0不等于0，跳转到LOOP2
         RET                                        ；执行完这条后就跳转到空白段了
         .end

2万 · 2012-2-25 12:32

看这段程序，好像没问题啊，是不是还有其他的配置没有配，导致程序跑飞了呢

只看该作者 · 2012-2-26 09:27

这是.cmd文件里的，不知道有没有问题
MEMORY
{
PAGE 0:

      MMR       : origin = 0000000h, length = 00000c0h
      SPRAM    : origin = 00000c0h, length = 0000040h
      VECS    : origin = 0000100h, length = 0000100h
      DARAM0  : origin = 0000200h, length = 0003E00h
      DARAM1  : origin = 0004000h, length = 0004000h
      DARAM2  : origin = 0008000h, length = 0004000h
      DARAM3  : origin = 000c000h, length = 0004000h

      SARAM0  : origin = 0010000h, length = 0004000h
      SARAM1  : origin = 0014000h, length = 0005000h
      SARAM2  : origin = 0019000h, length = 0003000h
      SARAM3  : origin = 001c000h, length = 0004000h
      SARAM4  : origin = 0020000h, length = 0004000h
      SARAM5  : origin = 0024000h, length = 0004000h
      SARAM6  : origin = 0028000h, length = 0004000h
      SARAM7  : origin = 002c000h, length = 0004000h
      SARAM8  : origin = 0030000h, length = 0004000h
      SARAM9  : origin = 0034000h, length = 0004000h
      SARAM10 : origin = 0038000h, length = 0004000h
      SARAM11 : origin = 003c000h, length = 0004000h
      SARAM12 : origin = 0040000h, length = 0004000h
      SARAM13 : origin = 0044000h, length = 0004000h
      SARAM14 : origin = 0048000h, length = 0004000h
      SARAM15 : origin = 004c000h, length = 0004000h

      CE0    : origin = 0050000h, length = 03b0000h
      CE1    : origin = 0400000h, length = 0400000h
      CE2    : origin = 0800000h, length = 0400000h
      CE3    : origin = 0c00000h, length = 03f8000h

      PDROM : origin = 0ff8000h, length = 07f00h
/* VECS : origin = 0ffff00h, length = 00100h */ /* reset vector */
}

SECTIONS
{
      vectors  : {} > VECS PAGE 0       /* interrupt vector table */
      .cinit    : {} > SARAM0 PAGE 0
      .text    : {} > SARAM1 PAGE 0
      isrs       : {} > SARAM2 PAGE 0

      .stack    : {} > DARAM0 PAGE 0
      .sysstack  : {} > DARAM0 PAGE 0
      .sysmem : {} > DARAM1 PAGE 0
      .data       : {} > DARAM1 PAGE 0
      .bss       : {} > DARAM1 PAGE 0
      .const    : {} > DARAM1 PAGE 0

      .cio    : {} > DARAM1 PAGE 0
      .csldata:  {} > DARAM0 PAGE 0


}

只看该作者 · 2012-2-27 12:56

检查说是CMD文件的问题，越界了，不知道怎么改

只看该作者 · 2012-7-7 16:18

找到问题了，开始处吧堆栈设置好就行了

dsp执行RET指令后程序指针跳转到空白段

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