crevars
Joined: 22 Aug 2007
Posts: 2
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| linking problem ? |
 Posted: Fri Sep 28, 2007 3:48 am |
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Hi, I have a problem with my project. I did a test with a multiple compilation unit.
This is my code in keybox.c
| Code: |
#include <18F4620.h>
#include "serial.h"
#fuses H4
#byte TRISC = 0xF94
#byte TRISB = 0xF93
#byte PORTB = 0xF81
void main()
{
TRISB = 0x00;
PORTB = 0x03;
initComm();
while (1)
{
putch('T');
}
}
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then serial.h
| Code: |
void initComm(void);
void putch(unsigned char param);
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finally serial.c
| Code: |
#include <18F4620.h>
#define BAUD 115200
#define FOSC 40000000L
#define DIVIDER ((int16)(FOSC/(16UL * BAUD) -1))
#define SPEED 0x4
#byte TRISC = 0xF94
#define _TRISC 0xF94
#byte SPBRG = 0xFAF
#byte TXSTA = 0xFAC
#define _TXSTA 0xFAC
#bit TRISC6 = _TRISC.6
#bit TRISC7 = _TRISC.7
#byte TXREG = 0xFAD
#define _TXREG 0xFAD
#bit TRMT = _TXSTA.1
void initComm(void)
{
SPBRG = DIVIDER;
TXSTA = (SPEED|0x20);
TRISC6=0;
TRISC7=1;
}
void putch(unsigned char param)
{
while(!TRMT);
TXREG = param;
}
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And now the result in disassembly lisnting:
| Code: |
--- C:\Documents and Settings\fjullien\Mes documents\Electronique\µC\ProtectsPIC\keybox\keybox.c
1: #include <18F4620.h>
0000 EF10 GOTO 0x20
2: #include "serial.h"
3:
4: #fuses H4
5:
6: #byte TRISC = 0xF94
7: #byte TRISB = 0xF93
8: #byte PORTB = 0xF81
9:
10: void main()
11: {
0020 6AF8 CLRF 0xff8, ACCESS
0022 9ED0 BCF 0xfd0, 0x7, ACCESS
0024 6AEA CLRF 0xfea, ACCESS
0026 6AE9 CLRF 0xfe9, ACCESS
0028 50C1 MOVF 0xfc1, W, ACCESS
002A 0BC0 ANDLW 0xc0
002C 090F IORLW 0xf
002E 6EC1 MOVWF 0xfc1, ACCESS
0030 0E07 MOVLW 0x7
0032 6EB4 MOVWF 0xfb4, ACCESS
12: TRISB = 0x00;
0034 6A93 CLRF 0xf93, ACCESS
13: PORTB = 0x03;
0036 0E03 MOVLW 0x3
0038 6E81 MOVWF 0xf81, ACCESS
14:
15: initComm();
003A D7E4 BRA 0x4
16:
17: while (1)
18: {
19: putch('T');
003C 0E54 MOVLW 0x54
003E 6E06 MOVWF 0x6, ACCESS
0040 D7E9 BRA 0x14
20: }
0042 D7FC BRA 0x3c
21: }
0004 0E14 MOVLW 0x14
0006 6E5E MOVWF 0x5e, ACCESS
0008 0E24 MOVLW 0x24
000A 6E58 MOVWF 0x58, ACCESS
000C 9829 BCF 0x29, 0x4, ACCESS
000E 8C29 BSF 0x29, 0x6, ACCESS
0010 EF1E GOTO 0x3c
0014 A458 BTFSS 0x58, 0x2, ACCESS
0016 D7FE BRA 0x14
0018 C006 MOVFF 0x6, 0xf5a
--- C:\Documents and Settings\fjullien\Mes documents\Electronique\µC\ProtectsPIC\keybox\keybox.hex
1: :020000040000FA
2: :1000000010EF00F0140E5E6E240E586E2998298CA5
3: :100010001EEF00F058A4FED706C05AFF21EF00F0F3
4: :10002000F86AD09EEA6AE96AC150C00B0F09C16E36
5: :10003000070EB46E936A030E816EE4D7540E066EFB
6: :06004000E9D7FCD7030024
7: :020000040030CA
8: :0E00000000061E1E008381000FC00FE00F409F
9: :00000001FF
10: ;PIC18F4620
001C EF21 GOTO 0x42
--- C:\Program Files\PICC\devices\18F4620.h ----------------------------------------------------
1: //////// Standard Header file for the PIC18F4620 device ////////////////
0044 0003 SLEEP
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That's a long post  In serial.c, all the memory reference (SPBRG, TXSTA,...) are wrong. Look the putch wait loop:
| Code: |
0014 A458 BTFSS 0x58, 0x2, ACCESS
0016 D7FE BRA 0x14
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0x58 ?!?
When I put everything in the same file, everything is ok....linking problem ?
I'm using ccs 4.052.
Thanks in adavance.
Franck |
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