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spark_abacus
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use newlib

This commit is contained in:
King Kévin 2016-08-20 23:27:01 +02:00
parent 3c4a1ae976
commit c6c74aaa1b
2 changed files with 17 additions and 21 deletions
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29
Makefile
View File

@ -26,7 +26,7 @@ BINARY = firmware
# which development board is used
# supported are: SYSTEM_BOARD, MAPLE_MINI, BLUE_PILL
BOARD ?= BLUE_PILL
BOARD ?= SYSTEM_BOARD
# source files
CSRC = $(wildcard *.c)
@ -48,9 +48,11 @@ LIB_OBJ = $(patsubst %.c,%.o,$(LIB_CSRC))
# cross-compiler tools
PREFIX ?= arm-none-eabi
# compile using gcc (requires gcc-arm-none-eabi)
CC := $(PREFIX)-gcc
#CC := $(PREFIX)-gcc
# compile using clang (requires clang gcc-multilib)
CC := clang -target $(PREFIX)
# link using gcc (requires gcc-arm-none-eabi)
#LD := $(PREFIX)-gcc
# link (requires binutils-arm-none-eabi)
LD := $(PREFIX)-ld
# create archive (requires binutils-arm-none-eabi)
@ -88,11 +90,10 @@ endif
DEFS += -DSTM32F1 -D$(BOARD)
# C flags
CFLAGS += -Os -g -std=c99 -nostdlib
# TODO try to get rid of system libraries (and use -ffreestanding)
CFLAGS += -fno-common -ffunction-sections -fdata-sections
CFLAGS += -Wpedantic -Wall -Werror -Wundef -Wextra -Wshadow -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -Wstrict-overflow=5
CFLAGS += -I. -I$(INCLUDE_DIR) $(patsubst %,-I%,$(LIB))
CFLAGS += -Os -g -std=c99 -nostdlib -nostdinc
CFLAGS += -fno-common -ffunction-sections -fdata-sections -ffreestanding
CFLAGS += -Wpedantic -Wall -Werror -Wextra -Wshadow -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -Wstrict-overflow=5
CFLAGS += -I/usr/include/newlib/ -I/usr/lib/gcc/arm-none-eabi/*/include/ -I. -I$(INCLUDE_DIR) $(patsubst %,-I%,$(LIB))
CFLAGS += $(DEFS)
# linker flags
@ -101,20 +102,16 @@ LDFLAGS += -static -nostartfiles -nostdlib
LDFLAGS += --library-path $(LIB_DIR)
LIBNAME = opencm3_stm32f1
LDLIBS += --library $(LIBNAME)
# TODO use newlib (providing libc, libm, and libg/libnosys) and get rib of the libgcc
# curiously newlib seems to require libgcc (In function `_vfprintf_r': undefined reference to `__aeabi_dcmplt')
# also even with libcc aliases are missing (In function `cdcacm_data_rx_cb': undefined reference to `__aeabi_memset')
#LDFLAGS += --library-path /usr/lib/arm-none-eabi/newlib/armv7-m/
# provides libgcc
# use newlib (providing libc, libm, libnosys, libg)
# TODO retrieve path automatically
LDFLAGS += --library-path /usr/lib/arm-none-eabi/newlib/armv7-m/
# use libgcc (provides __aeabi_*)
# TODO retrieve path automatically (arm-none-eabi-gcc does it on its own)
LDFLAGS += --library-path /usr/lib/gcc/arm-none-eabi/*/armv7-m/
# provides libc, libm, libnosys
# TODO retrieve path automatically (arm-none-eabi-gcc does it on its own)
LDFLAGS += --library-path /usr/arm-none-eabi/lib/armv7-m/
# own libraries
LDFLAGS += --dynamic-linker . $(patsubst %,--dynamic-linker %,$(LIB))
# libc and other system libraries
LDLIBS += --library c --library gcc --library nosys --library m
LDLIBS += --library c --library gcc --library nosys --library g --library m
# linker script for micro-controller
LDFLAGS += -T $(LDSCRIPT)

9
main.c
View File

@ -135,7 +135,8 @@ error:
/** program entry point
* this is the firmware function started by the micro-controller
*/
int main(void)
void main(void);
void main(void)
{
rcc_clock_setup_in_hse_8mhz_out_72mhz(); // use 8 MHz high speed external clock to generate 72 MHz internal clock
@ -145,8 +146,8 @@ int main(void)
// setup USART and USB for user communication
usart_setup(); // setup USART (for printing)
cdcacm_setup(); // setup USB CDC ACM (for printing)
//setbuf(stdout, NULL); // set standard out buffer to NULL to immediately print
//setbuf(stderr, NULL); // set standard error buffer to NULL to immediately print
setbuf(stdout, NULL); // set standard out buffer to NULL to immediately print
setbuf(stderr, NULL); // set standard error buffer to NULL to immediately print
// minimal setup ready
printf("welcome to the STM32F1 CuVoodoo example code\n"); // print welcome message
@ -225,8 +226,6 @@ int main(void)
__WFI(); // go to sleep
}
}
return 0;
}