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CristianC72
Guest
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| Function Pointer BUG?? |
 Posted: Tue Feb 17, 2009 10:24 am |
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I must use function pointer but I have a several problem.
If I make a project with a single module es. 'main.c' all work, if I make a
project with multiple modules function pointer doesn't work.
This is the Working code with single module:
| Code: |
//MAIN.C
#include "main.h"
void Task1(void)
{
printf("Start Task 1\r\n");
}
void Task2(void)
{
printf("Start Task 2\r\n");
}
typedef void (*_fptr)(void);
void main(void)
{
_fptr fprt[2] = {Task1, Task2};
for (;;)
{
(*fprt[0])();
(*fprt[1])();
delay_ms(1000);
}
}
// MAIN.H
#include <18F4685.H>
#FUSES NOWDT // No Watch Dog Timer
#FUSES WDT128 // Watch Dog Timer uses 1:128 Postscale
#FUSES H4 // High speed osc with HW enabled 4X PLL
#FUSES NOPROTECT // Code not protected from reading
#FUSES NOBROWNOUT // No brownout reset
#FUSES BORV20 // Brownout reset at 2.0V
#FUSES NOPUT // No Power Up Timer
#FUSES NOCPD // No EE protection
#FUSES NOSTVREN // Stack full/underflow will cause reset
#FUSES NODEBUG // No Debug mode for ICD
#FUSES NOLVP // Low Voltage Programming on B3(PIC16) or B5(PIC18)
#FUSES NOWRT // Program memory not write protected
#FUSES NOWRTD // Data EEPROM not write protected
#FUSES IESO // Internal External Switch Over mode enabled
#FUSES FCMEN // Fail-safe clock monitor enabled
#FUSES NOPBADEN // PORTB pins are configured as digital I/O on RESET
#FUSES NOWRTC // configuration not registers write protected
#FUSES NOWRTB // Boot block not write protected
#FUSES NOEBTR // Memory not protected from table reads
#FUSES NOEBTRB // Boot block not protected from table reads
#FUSES NOCPB // No Boot Block code protection
#FUSES LPT1OSC // Timer1 configured for low-power operation
#FUSES MCLR // Master Clear pin enabled
#FUSES NOXINST // Extended set extension and Indexed Addressing mode disabled (Legacy mode)
#use delay(clock = 40000000)
#use rs232(baud=115200,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
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This is the result in the assembler file
| Code: |
.................... for (;;)
.................... {
.................... (*fprt[0])();
000EE: CLRF FEA
000F0: MOVLW 06
000F2: MOVWF FE9
000F4: RCALL 004C <----Call function
.................... (*fprt[1])();
000F6: CLRF FEA
000F8: MOVLW 0A
000FA: MOVWF FE9
000FC: RCALL 004C
.................... delay_ms(1000);
000FE: MOVLW 04
00100: MOVWF 0E
00102: MOVLW FA
00104: MOVWF 0F
00106: BRA 0086
00108: DECFSZ 0E,F
0010A: BRA 0102
.................... }
0010C: BRA 00EE
.................... }
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If I insert another file and now i compile with 2 module i have this assembler instruction
| Code: |
.................... for (;;)
.................... {
.................... (*fprt[0])();
000E6: CLRF FEA
000E8: MOVLW 06
000EA: MOVWF FE9 <----RCALL MISSED!!!!!!
.................... (*fprt[1])();
00114: CLRF FEA
00116: MOVLW 0A
00118: MOVWF FE9
.................... delay_ms(1000);
00140: MOVLW 04
00142: MOVWF 0E
00144: MOVLW FA
00146: MOVWF 0F
00148: BRA 007C
0014A: DECFSZ 0E,F
0014C: BRA 0144
.................... }
0014E: BRA 00E6
.................... }
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Feb 17, 2009 1:24 pm |
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I don't think CCS officially says that function pointers work. I think they
work unofficially or as "beta". My suggestion is, if they don't work
with Multiple Compilation Units, then just use the "one big source file"
method. |
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Guest
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| Posted: Wed Feb 18, 2009 3:46 am |
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Yes,
I have try this way and work, but I prefer have multiply modules
Txh
Cristian |
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