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PIC12F635 Startup code

 
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PIC12F635 Startup code
PostPosted: Sun May 22, 2005 12:53 pm     Reply with quote
PCM Version 3.221 generated the following code.

Code:

#include <12F635.h>
#fuses INTRC_IO, NOWDT, MCLR, NOPROTECT, NOBROWNOUT

0000 3000       00001 MOVLW  00
0001 008A       00002 MOVWF  0A
0002 2804       00003 GOTO   004
0003 0000       00004 NOP
0004 23FF       00005 CALL   3FF
0005 1683       00006 BSF    03.5
0006 0090       00007 MOVWF  10
0007 3000       00008 MOVLW  00
0008 008A       00009 MOVWF  0A
0009 283D       00010 GOTO   03D


Since there is no oscall at 0x03ff, the "call 3ff" statement seems causing the system wait forever.

If I insert "0x3400" value at 0x03ff address using a programmer, the system runs properly. But I am not able to to do so using ICD-U40.

Is there a way to overcome this 'bug'(?) by forcing the compiler insert '0x3400' at 0x03ff address?

Rob
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun May 22, 2005 2:52 pm     Reply with quote
Read my post near the end of this thread. It tells how to use the #ROM
statement to fix this type of bug in the CCS compiler.
http://www.ccsinfo.com/forum/viewtopic.php?t=22280&highlight=rom+osccal
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