Hallo,
ich verwende das AT91SAM7S64 Board von Olimex zusammen mit dem
ARM-Tiny-USB und der mitgelieferten OpenOCD-Yagarto-Toolchain-Eclipse.
Ich möchte den Befehl sprintf() verwenden. Dazu habe ich stdio.h
eingebunden. Trotzdem kommt die Fehlermeldung: undefined reference to
sprintf
Woran kann dies liegen?
Hier ein Auszug aus dem Makefile:
1 | NAME = demo_at91sam7_h256_blink_flash
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2 |
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3 | # variables
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4 | CC = arm-elf-gcc
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5 | LD = arm-elf-ld -v -lc
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6 | AR = arm-elf-ar
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7 | AS = arm-elf-as
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8 | CP = arm-elf-objcopy
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9 | OD = arm-elf-objdump
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10 |
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11 | CFLAGS = -I./ -c -fno-common -O0 -g
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12 | AFLAGS = -ahls -mapcs-32 -o crt.o
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13 | LFLAGS = -Map main.map -Tdemo_at91sam7_h256_blink_flash.cmd
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14 | CPFLAGS = --output-target=binary
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15 | ODFLAGS = -x --syms
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16 |
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17 | OBJECTS = crt.o main.o timerisr.o timersetup.o isrsupport.o lowlevelinit.o blinker.o
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18 |
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19 |
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20 | # make target called by Eclipse (Project -> Clean ...)
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21 | clean:
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22 | -rm -f $(OBJECTS) crt.lst main.lst main.out main.bin main.hex main.map main.dmp
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23 |
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24 |
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25 | #make target called by Eclipse (Project -> Build Project)
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26 | all: main.out
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27 | @ echo "...copying"
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28 | $(CP) $(CPFLAGS) main.out main.bin
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29 | $(OD) $(ODFLAGS) main.out > main.dmp
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30 |
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31 | main.out: $(OBJECTS) demo_at91sam7_h256_blink_flash.cmd
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32 | @ echo "..linking"
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33 | $(LD) $(LFLAGS) -o main.out $(OBJECTS) libgcc.a
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34 |
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35 | crt.o: crt.s
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36 | @ echo ".assembling crt.s"
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37 | $(AS) $(AFLAGS) crt.s > crt.lst
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Und hier ein Auszug aus main.c
1 | #include <stdio.h>
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2 | #include <string.h>
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3 | #include "AT91SAM7S256.h"
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4 | #include "board.h"
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5 |
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6 |
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7 | // *******************************************************
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8 | // Global Variables
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9 | // *******************************************************
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10 | unsigned int FiqCount = 0; // global uninitialized variable
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11 |
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12 |
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13 | // *******************************************************
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14 | // MAIN
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15 | // ******************************************************/
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16 | int main (void) {
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17 | unsigned long j; // loop counter (stack variable)
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18 | unsigned long IdleCount = 0; // idle loop blink counter (2x)
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19 |
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20 | char buff_send[50];
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21 | unsigned int status;
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22 |
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23 | // Initialize the Atmel AT91SAM7S256 (watchdog, PLL clock, default interrupts, etc.)
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24 | // ---------------------------------------------------------------------------------
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25 | LowLevelInit();
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26 |
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27 |
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28 | // Turn on the peripheral clock for Timer0
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29 | // ---------------------------------------
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30 |
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31 | // pointer to PMC data structure
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32 | volatile AT91PS_PMC pPMC = AT91C_BASE_PMC;
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33 |
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34 |
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35 | sprintf((char*)buff_send, "Status: %i\r\n", status);
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Kann mir da jemand helfen?
Schönen Gruß,
Johannes
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