blink with busy delay, bugfix for the ld script
This commit is contained in:
olikraus
parent
4b66f1ce36
commit
628087dd29
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@ -32,6 +32,8 @@
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Additionall KEEPs added for .init and .fini. Without this KEEP the
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generated code will not work, because of the missing _init function.
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4. Bugfix: Allign the end of the flash area
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*/
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_Stack_Size = 0x400; /* stm32l0: estimated amount of stack */
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@ -112,6 +114,9 @@ SECTIONS
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*(.rodata*)
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*(.eh_frame*)
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/* allign the end of the flash area */
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. = ALIGN(4);
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} > FLASH
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.ARM.extab :
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@ -0,0 +1,148 @@
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#
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# Generic and Simple GNU ARM Makefile
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#
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# Desinged for the gnu-arm-none-eabi tool chain
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#
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# Features
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# - create hex file
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# - create assembler listing (.dis)
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#
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# Limitations
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# - only C-files supported
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# - no automatic dependency checking (call 'make clean' if any .h files are changed)
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#
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# Targets:
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# make
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# create hex file, no upload
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# make upload
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# create and upload hex file
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# make clean
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# delete all generated files
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#
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# Note:
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# Display list make database: make -p -f/dev/null | less
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#
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#================================================
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# External tools
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# The base directory of gcc-arm-none-eabi
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# Can be empty on Ubuntu and installed gcc-arm-none-eabi
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# If set, GCCBINPATH must contain a "/" at the end.
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GCCBINPATH:=/usr/bin/
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#================================================
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# Project Information
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# The name for the project
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TARGETNAME:=blink
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# The source files of the project
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CSRC:=$(wildcard *.c)
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SSRC:=$(wildcard ../stm32l0xx/src/*.s)
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# The CPU architecture (will be used for -mcpu)
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# for the LPC824, can we use "cortex-m0plus"?
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MCPU:=cortex-m0plus
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# Include directory for the system include files
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SYSINC:=../stm32l0xx/inc
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SYSSRC:=$(wildcard ../stm32l0xx/src/*.c)
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# Include directory for the u8g2 include files
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#U8G2INC:=../../../../csrc/
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#U8G2SRC:=$(wildcard ../../../../csrc/*.c)
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# directory for FatFS
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#FFINC:=../fatfs
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#FFSRC:=$(wildcard ../fatfs/*.c)
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# Directory for the linker script
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LDSCRIPTDIR:=.
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# Name of the linker script (must be the "keep" script, because the other script is not always working)
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LDSCRIPT:=stm32l031x6.ld
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#================================================
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# Main part of the Makefile starts here. Usually no changes are needed.
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# Internal Variable Names
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LIBNAME:=$(TARGETNAME).a
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ELFNAME:=$(TARGETNAME).elf
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HEXNAME:=$(TARGETNAME).hex
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DISNAME:=$(TARGETNAME).dis
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MAPNAME:=$(TARGETNAME).map
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OBJ:=$(CSRC:.c=.o) $(SSRC:.s=.o) $(SYSSRC:.c=.o)
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# $(SYSSRC:.c=.o) $(U8G2SRC:.c=.o) $(FFSRC:.c=.o)
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# Replace standard build tools by arm tools
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AS:=$(GCCBINPATH)arm-none-eabi-as
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CC:=$(GCCBINPATH)arm-none-eabi-gcc
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AR:=$(GCCBINPATH)arm-none-eabi-ar
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OBJCOPY:=$(GCCBINPATH)arm-none-eabi-objcopy
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OBJDUMP:=$(GCCBINPATH)arm-none-eabi-objdump
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SIZE:=$(GCCBINPATH)arm-none-eabi-size
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# Common flags
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COMMON_FLAGS = -mthumb -mcpu=$(MCPU)
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COMMON_FLAGS += -DSTM32L031xx
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COMMON_FLAGS += -Wall -I. -I$(SYSINC) -I$(U8G2INC)
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# define stack size (defaults to 0x0100)
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# COMMON_FLAGS += -D__STACK_SIZE=0x0100
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# COMMON_FLAGS += -Os -flto
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COMMON_FLAGS += -Os
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# COMMON_FLAGS += -fstack-protector
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# COMMON_FLAGS += -finstrument-functions
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# Do not use stand libs startup code. Uncomment this for gcclib procedures
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# memcpy still works, but might be required for __aeabi_uidiv
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# COMMON_FLAGS += -nostdlib
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# remove unused data and function
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#COMMON_FLAGS += -ffunction-sections -fdata-sections -fshort-wchar
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COMMON_FLAGS += -ffunction-sections -fdata-sections
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# C flags
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CFLAGS:=$(COMMON_FLAGS) -std=gnu99
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# LD flags
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# remove unreferenced procedures and variables, but __isr_vector
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GC:=-Wl,--gc-sections -Wl,--undefined=__isr_vector
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MAP:=-Wl,-Map=$(MAPNAME)
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LFLAGS:=$(COMMON_FLAGS) $(GC) $(MAP)
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#LDLIBS:=--specs=nosys.specs -lc -lc -lnosys -L$(LDSCRIPTDIR) -T $(LDSCRIPT)
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LDLIBS:=--specs=nosys.specs -L$(LDSCRIPTDIR) -T $(LDSCRIPT)
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# Additional Suffixes
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.SUFFIXES: .elf .hex .bin .dis
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# Targets
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.PHONY: all
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all: $(DISNAME) $(HEXNAME)
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$(SIZE) $(ELFNAME)
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.PHONY: upload
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upload: $(DISNAME) $(HEXNAME) $(ELFNAME)
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stm32flash -e 255 -g 0 -w $(HEXNAME) -v /dev/ttyUSB0
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$(SIZE) $(ELFNAME)
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.PHONY: clean
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clean:
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$(RM) $(OBJ) $(HEXNAME) $(ELFNAME) $(LIBNAME) $(DISNAME) $(MAPNAME) libssp.a libssp_nonshared.a
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# implicit rules
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.elf.hex:
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$(OBJCOPY) -O ihex $< $@
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# explicit rules
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$(ELFNAME): $(LIBNAME)($(OBJ)) libssp.a libssp_nonshared.a
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$(LINK.o) $(LFLAGS) $(LIBNAME) $(LDLIBS) -o $@
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$(DISNAME): $(ELFNAME)
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$(OBJDUMP) -D -S $< > $@
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# create empty ssp libs for -fstack-protector-all -fstack-protector
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libssp.a:
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$(AR) rcs $@
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libssp_nonshared.a:
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$(AR) rcs $@
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@ -0,0 +1,129 @@
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/*
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delay.c
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The delay function delay_micro_seconds() will use the global variable
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SystemCoreClock. A call to SystemCoreClockUpdate() is required before
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using delay_micro_seconds().
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STM32L031 Project (U8g2 Library)
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Copyright (c) 2017, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "stm32l031xx.h"
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/* Generic ARM delay procedure, based on the system timer (SysTick) */
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/*
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Delay by the provided number of system ticks.
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The delay must be smaller than the RELOAD value.
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This delay has an imprecision of about +/- 20 system ticks.
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*/
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static void _delay_system_ticks_sub(uint32_t sys_ticks)
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{
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uint32_t start_val, end_val, curr_val;
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uint32_t load;
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start_val = SysTick->VAL;
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start_val &= 0x0ffffffUL;
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end_val = start_val;
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if ( end_val < sys_ticks )
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{
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/* check, if the operation after this if clause would lead to a negative result */
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/* if this would be the case, then add the reload value first */
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load = SysTick->LOAD;
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load &= 0x0ffffffUL;
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end_val += load;
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}
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/* counter goes towards zero, so end_val is below start value */
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end_val -= sys_ticks;
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/* wait until interval is left */
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if ( start_val >= end_val )
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{
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for(;;)
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{
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curr_val = SysTick->VAL;
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curr_val &= 0x0ffffffUL;
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if ( curr_val <= end_val )
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break;
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if ( curr_val > start_val )
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break;
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}
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}
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else
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{
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for(;;)
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{
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curr_val = SysTick->VAL;
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curr_val &= 0x0ffffffUL;
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if ( curr_val <= end_val && curr_val > start_val )
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break;
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}
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}
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}
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/*
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Delay by the provided number of system ticks.
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Any values between 0 and 0x0ffffffff are allowed.
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*/
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void delay_system_ticks(uint32_t sys_ticks)
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{
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uint32_t load4;
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load4 = SysTick->LOAD;
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load4 &= 0x0ffffffUL;
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load4 >>= 2;
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while ( sys_ticks > load4 )
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{
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sys_ticks -= load4;
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_delay_system_ticks_sub(load4);
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}
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_delay_system_ticks_sub(sys_ticks);
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}
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/*
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Delay by the provided number of micro seconds.
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Limitation: "us" * System-Freq in MHz must not overflow in 32 bit.
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Values between 0 and 1.000.000 (1 second) are ok.
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Important: Call SystemCoreClockUpdate() before calling this function.
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*/
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void delay_micro_seconds(uint32_t us)
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{
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uint32_t sys_ticks;
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sys_ticks = SystemCoreClock;
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sys_ticks /=1000000UL;
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sys_ticks *= us;
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delay_system_ticks(sys_ticks);
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}
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@ -0,0 +1,55 @@
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/*
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delay.h
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LPC11U3x GPS Logger (https://github.com/olikraus/lpc11u3x-gps-logger)
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Copyright (c) 2016, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
|
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|
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* Redistributions of source code must retain the above copyright notice, this list
|
||||
of conditions and the following disclaimer.
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||||
|
||||
* Redistributions in binary form must reproduce the above copyright notice, this
|
||||
list of conditions and the following disclaimer in the documentation and/or other
|
||||
materials provided with the distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
||||
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
||||
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
||||
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _DELAY_H
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#define _DELAY_H
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#include <stdint.h>
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/*
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Delay by the provided number of system ticks.
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Any values between 0 and 0x0ffffffff are allowed.
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*/
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void delay_system_ticks(uint32_t sys_ticks);
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/*
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Delay by the provided number of micro seconds.
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Limitation: "us" * System-Freq in MHz must now overflow in 32 bit.
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Values between 0 and 1.000.000 (1 second) are ok.
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Important: Call SystemCoreClockUpdate() before calling this function.
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*/
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void delay_micro_seconds(uint32_t us);
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#endif /* _DELAY_H */
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@ -0,0 +1,97 @@
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/* LED blink project for the STM32L031 */
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#include "stm32l031xx.h"
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#include "delay.h"
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volatile unsigned long SysTickCount = 0;
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void __attribute__ ((interrupt, used)) SysTick_Handler(void)
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{
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SysTickCount++;
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}
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void setHSIClock()
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{
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/* test if the current clock source is something else than HSI */
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if ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
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{
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/* enable HSI */
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RCC->CR |= RCC_CR_HSION;
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/* wait until HSI becomes ready */
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while ( (RCC->CR & RCC_CR_HSIRDY) == 0 )
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;
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/* enable the HSI "divide by 4" bit */
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RCC->CR |= (uint32_t)(RCC_CR_HSIDIVEN);
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/* wait until the "divide by 4" flag is enabled */
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while((RCC->CR & RCC_CR_HSIDIVF) == 0)
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;
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/* then use the HSI clock */
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RCC->CFGR = (RCC->CFGR & (uint32_t) (~RCC_CFGR_SW)) | RCC_CFGR_SW_HSI;
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/* wait until HSI clock is used */
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while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
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;
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}
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/* disable PLL */
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RCC->CR &= (uint32_t)(~RCC_CR_PLLON);
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/* wait until PLL is inactive */
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while((RCC->CR & RCC_CR_PLLRDY) != 0)
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;
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/* set latency to 1 wait state */
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FLASH->ACR |= FLASH_ACR_LATENCY;
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/* At this point the HSI runs with 4 MHz */
|
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/* Multiply by 16 device by 2 --> 32 MHz */
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RCC->CFGR = (RCC->CFGR & (~(RCC_CFGR_PLLMUL| RCC_CFGR_PLLDIV ))) | (RCC_CFGR_PLLMUL16 | RCC_CFGR_PLLDIV2);
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/* enable PLL */
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RCC->CR |= RCC_CR_PLLON;
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|
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/* wait until the PLL is ready */
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while ((RCC->CR & RCC_CR_PLLRDY) == 0)
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;
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/* use the PLL has clock source */
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RCC->CFGR |= (uint32_t) (RCC_CFGR_SW_PLL);
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/* wait until the PLL source is active */
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while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_PLL)
|
||||
;
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}
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int main()
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||||
{
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setHSIClock();
|
||||
SystemCoreClockUpdate(); /* Update SystemCoreClock() */
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//SystemCoreClock = 32000000UL;
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|
||||
RCC->IOPENR |= RCC_IOPENR_IOPAEN; /* Enable clock for GPIO Port A */
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__NOP();
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__NOP();
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||||
GPIOA->MODER &= ~GPIO_MODER_MODE13; /* clear mode for PA13 */
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GPIOA->MODER |= GPIO_MODER_MODE13_0; /* Output mode for PA13 */
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GPIOA->OTYPER &= ~GPIO_OTYPER_OT_13; /* no Push/Pull for PA13 */
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GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED13; /* low speed for PA13 */
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GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD13; /* no pullup/pulldown for PA13 */
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GPIOA->BSRR = GPIO_BSRR_BR_13; /* atomic clr PA13 */
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SysTick->LOAD = (SystemCoreClock/1000)*50 - 1; /* 50ms task */
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SysTick->VAL = 0;
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SysTick->CTRL = 7; /* enable, generate interrupt (SysTick_Handler), do not divide by 2 */
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for(;;)
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{
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delay_micro_seconds(500000);
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GPIOA->BSRR = GPIO_BSRR_BS_13; /* atomic set PA13 */
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delay_micro_seconds(500000);
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||||
GPIOA->BSRR = GPIO_BSRR_BR_13; /* atomic clr PA13 */
|
||||
}
|
||||
}
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@ -0,0 +1,245 @@
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/*
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||||
|
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stm32l031x6.ld
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||||
|
||||
Modified for stm32l0 from the original nokeep.ld script from the
|
||||
arm-none-eabi examples by olikraus@gmail.com
|
||||
|
||||
Assuming, that the original nokeep.ld file is available under
|
||||
the GNU General Public License, this file is available under the
|
||||
same license.
|
||||
|
||||
There are three modifications:
|
||||
|
||||
1. Provide symbols for the stm32l0 startup code
|
||||
|
||||
The following symbols are required for the stm32l0 startup
|
||||
code (e.g. startup_stm32l031xx.s)
|
||||
|
||||
_sidata start address for the initialization values of the .data section
|
||||
_sdata start address for the .data section. defined in linker script
|
||||
_edata end address for the .data section. defined in linker script
|
||||
_sbss start address for the .bss section. defined in linker script
|
||||
_ebss end address for the .bss section. defined in linker script
|
||||
_estack top address of the stack
|
||||
|
||||
2. Stack size estimation / calculation
|
||||
|
||||
_Stack_Size has been added to allow better stack size calculation
|
||||
|
||||
3. KEEP keywords
|
||||
|
||||
Additionall KEEPs added for .init and .fini. Without this KEEP the
|
||||
generated code will not work, because of the missing _init function.
|
||||
|
||||
4. Bugfix: Allign the end of the flash area
|
||||
|
||||
*/
|
||||
|
||||
_Stack_Size = 0x400; /* stm32l0: estimated amount of stack */
|
||||
|
||||
|
||||
/* Linker script to configure memory regions.
|
||||
* Need modifying for a specific board.
|
||||
* FLASH.ORIGIN: starting address of flash
|
||||
* FLASH.LENGTH: length of flash
|
||||
* RAM.ORIGIN: starting address of RAM bank 0
|
||||
* RAM.LENGTH: length of RAM bank 0
|
||||
*/
|
||||
MEMORY
|
||||
{
|
||||
FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 32K
|
||||
RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 8K
|
||||
}
|
||||
|
||||
/* Linker script to place sections and symbol values. Should be used together
|
||||
* with other linker script that defines memory regions FLASH and RAM.
|
||||
* It references following symbols, which must be defined in code:
|
||||
* Reset_Handler : Entry of reset handler
|
||||
*
|
||||
* It defines following symbols, which code can use without definition:
|
||||
* __exidx_start
|
||||
* __exidx_end
|
||||
* __copy_table_start__
|
||||
* __copy_table_end__
|
||||
* __zero_table_start__
|
||||
* __zero_table_end__
|
||||
* __etext
|
||||
* __data_start__
|
||||
* __preinit_array_start
|
||||
* __preinit_array_end
|
||||
* __init_array_start
|
||||
* __init_array_end
|
||||
* __fini_array_start
|
||||
* __fini_array_end
|
||||
* __data_end__
|
||||
* __bss_start__
|
||||
* __bss_end__
|
||||
* __end__
|
||||
* end
|
||||
* __HeapLimit
|
||||
* __StackLimit
|
||||
* __StackTop
|
||||
* __stack
|
||||
*/
|
||||
ENTRY(Reset_Handler)
|
||||
|
||||
SECTIONS
|
||||
{
|
||||
.text :
|
||||
{
|
||||
KEEP(*(.isr_vector))
|
||||
*(.text*)
|
||||
|
||||
/* the st32l0 startup code calls __libc_init_array, which calls the _init */
|
||||
/* ... sooo.... better keep the init and fini sections */
|
||||
|
||||
KEEP ( *(.init) )
|
||||
KEEP ( *(.fini) )
|
||||
|
||||
/* .ctors */
|
||||
*crtbegin.o(.ctors)
|
||||
*crtbegin?.o(.ctors)
|
||||
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
|
||||
*(SORT(.ctors.*))
|
||||
*(.ctors)
|
||||
|
||||
/* .dtors */
|
||||
*crtbegin.o(.dtors)
|
||||
*crtbegin?.o(.dtors)
|
||||
*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
|
||||
*(SORT(.dtors.*))
|
||||
*(.dtors)
|
||||
|
||||
*(.rodata*)
|
||||
|
||||
*(.eh_frame*)
|
||||
|
||||
/* allign the end of the flash area */
|
||||
. = ALIGN(4);
|
||||
} > FLASH
|
||||
|
||||
.ARM.extab :
|
||||
{
|
||||
*(.ARM.extab* .gnu.linkonce.armextab.*)
|
||||
} > FLASH
|
||||
|
||||
__exidx_start = .;
|
||||
.ARM.exidx :
|
||||
{
|
||||
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
|
||||
} > FLASH
|
||||
__exidx_end = .;
|
||||
|
||||
/* To copy multiple ROM to RAM sections,
|
||||
* uncomment .copy.table section and,
|
||||
* define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
|
||||
/*
|
||||
.copy.table :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
__copy_table_start__ = .;
|
||||
LONG (__etext)
|
||||
LONG (__data_start__)
|
||||
LONG (__data_end__ - __data_start__)
|
||||
LONG (__etext2)
|
||||
LONG (__data2_start__)
|
||||
LONG (__data2_end__ - __data2_start__)
|
||||
__copy_table_end__ = .;
|
||||
} > FLASH
|
||||
*/
|
||||
|
||||
/* To clear multiple BSS sections,
|
||||
* uncomment .zero.table section and,
|
||||
* define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
|
||||
/*
|
||||
.zero.table :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
__zero_table_start__ = .;
|
||||
LONG (__bss_start__)
|
||||
LONG (__bss_end__ - __bss_start__)
|
||||
LONG (__bss2_start__)
|
||||
LONG (__bss2_end__ - __bss2_start__)
|
||||
__zero_table_end__ = .;
|
||||
} > FLASH
|
||||
*/
|
||||
|
||||
__etext = .;
|
||||
_sidata = .; /* for stm32l0 startup code */
|
||||
|
||||
.data : AT (__etext)
|
||||
{
|
||||
__data_start__ = .;
|
||||
_sdata = .; /* for stm32l0 startup code */
|
||||
*(vtable)
|
||||
*(.data*)
|
||||
|
||||
. = ALIGN(4);
|
||||
/* preinit data */
|
||||
PROVIDE_HIDDEN (__preinit_array_start = .);
|
||||
*(.preinit_array)
|
||||
PROVIDE_HIDDEN (__preinit_array_end = .);
|
||||
|
||||
. = ALIGN(4);
|
||||
/* init data */
|
||||
PROVIDE_HIDDEN (__init_array_start = .);
|
||||
*(SORT(.init_array.*))
|
||||
*(.init_array)
|
||||
PROVIDE_HIDDEN (__init_array_end = .);
|
||||
|
||||
|
||||
. = ALIGN(4);
|
||||
/* finit data */
|
||||
PROVIDE_HIDDEN (__fini_array_start = .);
|
||||
*(SORT(.fini_array.*))
|
||||
*(.fini_array)
|
||||
PROVIDE_HIDDEN (__fini_array_end = .);
|
||||
|
||||
*(.jcr)
|
||||
. = ALIGN(4);
|
||||
/* All data end */
|
||||
__data_end__ = .;
|
||||
_edata = .; /* for stm32l0 startup code */
|
||||
|
||||
} > RAM
|
||||
|
||||
.bss :
|
||||
{
|
||||
. = ALIGN(4);
|
||||
__bss_start__ = .;
|
||||
_sbss = .; /* for stm32l0 startup code */
|
||||
*(.bss*)
|
||||
*(COMMON)
|
||||
. = ALIGN(4);
|
||||
__bss_end__ = .;
|
||||
_ebss = .; /* for stm32l0 startup code */
|
||||
} > RAM
|
||||
|
||||
.heap (COPY):
|
||||
{
|
||||
__end__ = .;
|
||||
PROVIDE(end = .);
|
||||
*(.heap*)
|
||||
__HeapLimit = .;
|
||||
} > RAM
|
||||
|
||||
/* .stack_dummy section doesn't contains any symbols. It is only
|
||||
* used for linker to calculate size of stack sections, and assign
|
||||
* values to stack symbols later */
|
||||
.stack_dummy (COPY):
|
||||
{
|
||||
*(.stack*)
|
||||
. = . + _Stack_Size; /* estimated stack size */
|
||||
} > RAM
|
||||
|
||||
/* Set stack top to end of RAM, and stack limit move down by
|
||||
* size of stack_dummy section */
|
||||
__StackTop = ORIGIN(RAM) + LENGTH(RAM);
|
||||
_estack = __StackTop; /* for stm32l0 startup code */
|
||||
__StackLimit = __StackTop - SIZEOF(.stack_dummy);
|
||||
PROVIDE(__stack = __StackTop);
|
||||
|
||||
/* Check if data + heap + stack exceeds RAM limit */
|
||||
ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
|
||||
}
|
||||
|
|
@ -32,6 +32,8 @@
|
|||
Additionall KEEPs added for .init and .fini. Without this KEEP the
|
||||
generated code will not work, because of the missing _init function.
|
||||
|
||||
4. Bugfix: Allign the end of the flash area
|
||||
|
||||
*/
|
||||
|
||||
_Stack_Size = 0x400; /* stm32l0: estimated amount of stack */
|
||||
|
|
@ -112,6 +114,9 @@ SECTIONS
|
|||
*(.rodata*)
|
||||
|
||||
*(.eh_frame*)
|
||||
|
||||
/* allign the end of the flash area */
|
||||
. = ALIGN(4);
|
||||
} > FLASH
|
||||
|
||||
.ARM.extab :
|
||||
|
|
|
|||
|
|
@ -224,14 +224,14 @@ void SystemCoreClockUpdate (void)
|
|||
uint32_t tmp = 0U, pllmul = 0U, plldiv = 0U, pllsource = 0U, msirange = 0U;
|
||||
uint32_t hsi_value;
|
||||
|
||||
/* Get SYSCLK source -------------------------------------------------------*/
|
||||
tmp = RCC->CFGR & RCC_CFGR_SWS;
|
||||
|
||||
/* added by olikraus@gmail.com: The HSIDIV flag was not considered in the original code */
|
||||
hsi_value = 16000000UL;
|
||||
if ( (RCC->CR & RCC_CR_HSIDIVF) != 0 )
|
||||
hsi_value /= 4;
|
||||
|
||||
/* Get SYSCLK source -------------------------------------------------------*/
|
||||
tmp = RCC->CFGR & RCC_CFGR_SWS;
|
||||
|
||||
switch (tmp)
|
||||
{
|
||||
case 0x04U: /* HSI used as system clock */
|
||||
|
|
@ -266,6 +266,7 @@ void SystemCoreClockUpdate (void)
|
|||
SystemCoreClock = (32768U * (1U << (msirange + 1U)));
|
||||
break;
|
||||
}
|
||||
|
||||
/* Compute HCLK clock frequency --------------------------------------------*/
|
||||
/* Get HCLK prescaler */
|
||||
tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4U)];
|
||||
|
|
|
|||
Loading…
Reference in New Issue