Čaute,
vedeli by ste mi prosím poradiť, ako dostať v AT9260 dáta na SDRAM-ku (adresa 0x200000)? Čítal som nejaké matroše okolo nastavenia lds skriptu, ale nejako mi to nefunguje… akonahle zadam adresu -Tdata 0x20000000, tak mi program po kompiláci nefunguje.
moj Makefile:
[code]ifndef ERASE_FCT
ERASE_FCT=rm -f
endif
ifndef CROSS_COMPILE
CROSS_COMPILE=arm-elf-
endif
TOOLCHAIN=gcc
OUTFILE_SDRAM=at91sam9260_getting_started_sdram
INCL=./include
Comment the line below for debug mode
#OPTIM=-Os
ifeq ($(TOOLCHAIN), gcc)
AS=$(CROSS_COMPILE)gcc
CC=$(CROSS_COMPILE)gcc
LD=$(CROSS_COMPILE)gcc
NM= $(CROSS_COMPILE)nm
SIZE=$(CROSS_COMPILE)size
OBJCOPY=$(CROSS_COMPILE)objcopy
OBJDUMP=$(CROSS_COMPILE)objdump
CCFLAGS=-g -mcpu=arm9 $(OPTIM) -Wall -I$(INCL)
ASFLAGS=-D__ASSEMBLY__ -g -mcpu=arm9 -c $(OPTIM) -Wall -I$(INCL)
Linker flags.
-Wl,…: tell GCC to pass this to linker.
-Map: create map file
–cref: add cross reference to map file
-lc : tells the linker to tie in newlib
-lgcc : tells the linker to tie in newlib
LDFLAGS+=-nostartfiles -Wl,–cref
LDFLAGS+=-lc -lgcc
LDFLAGS+=-T elf32-littlearm.lds
OBJS=cstartup.o
endif
OBJS+= lowlevel.o
main.o
rebuild: clean all
all: sdram
sdram: $(OBJS)
$(LD) $(LDFLAGS) -Ttext 0x20000000 -Tdata 0x200000 -n -o $(OUTFILE_SDRAM).elf $(OBJS)
$(OBJCOPY) --strip-debug --strip-unneeded $(OUTFILE_SDRAM).elf -O binary $(OUTFILE_SDRAM).bin
main.o: main.c
$(CC) -c $(CCFLAGS) main.c -o main.o
lowlevel.o: lowlevel.c
$(CC) -c $(CCFLAGS) lowlevel.c -o lowlevel.o
emac.o: emac.c
$(CC) -c $(CCFLAGS) emac.c -o emac.o
cstartup.o: cstartup.S
$(AS) $(ASFLAGS) cstartup.S -o cstartup.o
clean:
$(ERASE_FCT) *.o *.bin *.elf *.map
[/code]
.lds subor:
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(reset_handler)
/*#include "project.h"*/
SECTIONS
{
.text : {
_stext = .;
*(.text)
*(.rodata) /* read-only data (constants) */
*(.rodata*)
. = ALIGN(4);
_etext = . ;
}
/* collect all initialized .data sections that go into FLASH */
.data : AT ( ADDR (.text) + SIZEOF (.text) ) {
_sdata = .;
*(.vectors)
*(.data)
_edata = .;
}
/* collect all uninitialized .bss sections that go into FLASH */
.bss (NOLOAD) : {
. = ALIGN(4);
_sbss = .;
*(.bss)
_ebss = .;
}
/* koli problemu pri kompilacii */
/DISCARD/ :
{
*(.eh_*)
}
}
end = .;
za každú radu vopred vďaka.