stm32 update
This commit is contained in:
kraus
parent
3d19f857a0
commit
51ca3f942f
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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_a13_a14
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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 +1,52 @@
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/* LED blink project for the STM32L031 */
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#include "stm32l031xx.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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switch ( SysTickCount & 3 )
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{
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case 0:
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GPIOA->BSRR = GPIO_BSRR_BS_13; /* atomic set PA13 */
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break;
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case 1:
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GPIOA->BSRR = GPIO_BSRR_BR_13; /* atomic clr PA13 */
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break;
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case 2:
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GPIOA->BSRR = GPIO_BSRR_BS_14; /* atomic set PA13 */
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break;
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case 3:
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GPIOA->BSRR = GPIO_BSRR_BR_14; /* atomic clr PA13 */
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break;
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}
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}
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int main()
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{
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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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GPIOA->MODER &= ~GPIO_MODER_MODE14; /* clear mode for PA14 */
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GPIOA->MODER |= GPIO_MODER_MODE14_0; /* Output mode for PA14 */
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GPIOA->OTYPER &= ~GPIO_OTYPER_OT_14; /* no Push/Pull for PA14 */
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GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED14; /* low speed for PA14 */
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GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD14; /* no pullup/pulldown for PA14 */
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GPIOA->BSRR = GPIO_BSRR_BR_14; /* atomic clr PA14 */
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SysTick->LOAD = 2000*500 - 1;
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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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}
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@ -0,0 +1,245 @@
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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
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arm-none-eabi examples by olikraus@gmail.com
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Assuming, that the original nokeep.ld file is available under
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the GNU General Public License, this file is available under the
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same license.
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There are three modifications:
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1. Provide symbols for the stm32l0 startup code
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The following symbols are required for the stm32l0 startup
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code (e.g. startup_stm32l031xx.s)
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_sidata start address for the initialization values of the .data section
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_sdata start address for the .data section. defined in linker script
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_edata end address for the .data section. defined in linker script
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_sbss start address for the .bss section. defined in linker script
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_ebss end address for the .bss section. defined in linker script
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_estack top address of the stack
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2. Stack size estimation / calculation
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_Stack_Size has been added to allow better stack size calculation
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3. KEEP keywords
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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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/* Linker script to configure memory regions.
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* Need modifying for a specific board.
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* FLASH.ORIGIN: starting address of flash
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* FLASH.LENGTH: length of flash
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* RAM.ORIGIN: starting address of RAM bank 0
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* RAM.LENGTH: length of RAM bank 0
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*/
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 32K
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 8K
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}
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/* Linker script to place sections and symbol values. Should be used together
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* with other linker script that defines memory regions FLASH and RAM.
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* It references following symbols, which must be defined in code:
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* Reset_Handler : Entry of reset handler
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*
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* It defines following symbols, which code can use without definition:
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* __exidx_start
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* __exidx_end
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* __copy_table_start__
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* __copy_table_end__
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* __zero_table_start__
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* __zero_table_end__
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* __etext
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* __data_start__
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* __preinit_array_start
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* __preinit_array_end
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* __init_array_start
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* __init_array_end
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* __fini_array_start
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* __fini_array_end
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* __data_end__
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* __bss_start__
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* __bss_end__
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* __end__
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* end
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* __HeapLimit
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* __StackLimit
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* __StackTop
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* __stack
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*/
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ENTRY(Reset_Handler)
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SECTIONS
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{
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.text :
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{
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KEEP(*(.isr_vector))
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*(.text*)
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/* the st32l0 startup code calls __libc_init_array, which calls the _init */
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/* ... sooo.... better keep the init and fini sections */
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KEEP ( *(.init) )
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KEEP ( *(.fini) )
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/* .ctors */
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*crtbegin.o(.ctors)
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*crtbegin?.o(.ctors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
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*(SORT(.ctors.*))
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*(.ctors)
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/* .dtors */
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*crtbegin.o(.dtors)
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*crtbegin?.o(.dtors)
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*(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
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*(SORT(.dtors.*))
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*(.dtors)
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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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{
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*(.ARM.extab* .gnu.linkonce.armextab.*)
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} > FLASH
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__exidx_start = .;
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.ARM.exidx :
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{
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||||||
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*(.ARM.exidx* .gnu.linkonce.armexidx.*)
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} > FLASH
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__exidx_end = .;
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|
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/* To copy multiple ROM to RAM sections,
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||||||
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* uncomment .copy.table section and,
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* define __STARTUP_COPY_MULTIPLE in startup_ARMCMx.S */
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||||||
|
/*
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||||||
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.copy.table :
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||||||
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{
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. = ALIGN(4);
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||||||
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__copy_table_start__ = .;
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||||||
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LONG (__etext)
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LONG (__data_start__)
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LONG (__data_end__ - __data_start__)
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LONG (__etext2)
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LONG (__data2_start__)
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LONG (__data2_end__ - __data2_start__)
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__copy_table_end__ = .;
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} > FLASH
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||||||
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*/
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/* To clear multiple BSS sections,
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* uncomment .zero.table section and,
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* define __STARTUP_CLEAR_BSS_MULTIPLE in startup_ARMCMx.S */
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/*
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.zero.table :
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{
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||||||
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. = ALIGN(4);
|
||||||
|
__zero_table_start__ = .;
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||||||
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LONG (__bss_start__)
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LONG (__bss_end__ - __bss_start__)
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LONG (__bss2_start__)
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LONG (__bss2_end__ - __bss2_start__)
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__zero_table_end__ = .;
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||||||
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} > FLASH
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*/
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__etext = .;
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_sidata = .; /* for stm32l0 startup code */
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.data : AT (__etext)
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{
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__data_start__ = .;
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_sdata = .; /* for stm32l0 startup code */
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*(vtable)
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*(.data*)
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|
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. = ALIGN(4);
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/* preinit data */
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PROVIDE_HIDDEN (__preinit_array_start = .);
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*(.preinit_array)
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PROVIDE_HIDDEN (__preinit_array_end = .);
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. = ALIGN(4);
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/* init data */
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||||||
|
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")
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,148 @@
|
||||||
|
#
|
||||||
|
# Generic and Simple GNU ARM Makefile
|
||||||
|
#
|
||||||
|
# Desinged for the gnu-arm-none-eabi tool chain
|
||||||
|
#
|
||||||
|
# Features
|
||||||
|
# - create hex file
|
||||||
|
# - create assembler listing (.dis)
|
||||||
|
#
|
||||||
|
# Limitations
|
||||||
|
# - only C-files supported
|
||||||
|
# - no automatic dependency checking (call 'make clean' if any .h files are changed)
|
||||||
|
#
|
||||||
|
# Targets:
|
||||||
|
# make
|
||||||
|
# create hex file, no upload
|
||||||
|
# make upload
|
||||||
|
# create and upload hex file
|
||||||
|
# make clean
|
||||||
|
# delete all generated files
|
||||||
|
#
|
||||||
|
# Note:
|
||||||
|
# Display list make database: make -p -f/dev/null | less
|
||||||
|
#
|
||||||
|
#================================================
|
||||||
|
# External tools
|
||||||
|
|
||||||
|
# The base directory of gcc-arm-none-eabi
|
||||||
|
# Can be empty on Ubuntu and installed gcc-arm-none-eabi
|
||||||
|
# If set, GCCBINPATH must contain a "/" at the end.
|
||||||
|
GCCBINPATH:=/usr/bin/
|
||||||
|
|
||||||
|
#================================================
|
||||||
|
# Project Information
|
||||||
|
|
||||||
|
# The name for the project
|
||||||
|
TARGETNAME:=gpio_pulse
|
||||||
|
|
||||||
|
# The source files of the project
|
||||||
|
CSRC:=$(wildcard *.c)
|
||||||
|
SSRC:=$(wildcard ../stm32l0xx/src/*.s)
|
||||||
|
|
||||||
|
# The CPU architecture (will be used for -mcpu)
|
||||||
|
# for the LPC824, can we use "cortex-m0plus"?
|
||||||
|
MCPU:=cortex-m0plus
|
||||||
|
|
||||||
|
# Include directory for the system include files
|
||||||
|
SYSINC:=../stm32l0xx/inc
|
||||||
|
SYSSRC:=$(wildcard ../stm32l0xx/src/*.c)
|
||||||
|
|
||||||
|
# Include directory for the u8g2 include files
|
||||||
|
#U8G2INC:=../../../../csrc/
|
||||||
|
#U8G2SRC:=$(wildcard ../../../../csrc/*.c)
|
||||||
|
|
||||||
|
# directory for FatFS
|
||||||
|
#FFINC:=../fatfs
|
||||||
|
#FFSRC:=$(wildcard ../fatfs/*.c)
|
||||||
|
|
||||||
|
# Directory for the linker script
|
||||||
|
LDSCRIPTDIR:=.
|
||||||
|
# Name of the linker script (must be the "keep" script, because the other script is not always working)
|
||||||
|
LDSCRIPT:=stm32l031x6.ld
|
||||||
|
|
||||||
|
#================================================
|
||||||
|
# Main part of the Makefile starts here. Usually no changes are needed.
|
||||||
|
|
||||||
|
# Internal Variable Names
|
||||||
|
LIBNAME:=$(TARGETNAME).a
|
||||||
|
ELFNAME:=$(TARGETNAME).elf
|
||||||
|
HEXNAME:=$(TARGETNAME).hex
|
||||||
|
DISNAME:=$(TARGETNAME).dis
|
||||||
|
MAPNAME:=$(TARGETNAME).map
|
||||||
|
OBJ:=$(CSRC:.c=.o) $(SSRC:.s=.o) $(SYSSRC:.c=.o)
|
||||||
|
# $(SYSSRC:.c=.o) $(U8G2SRC:.c=.o) $(FFSRC:.c=.o)
|
||||||
|
|
||||||
|
# Replace standard build tools by arm tools
|
||||||
|
AS:=$(GCCBINPATH)arm-none-eabi-as
|
||||||
|
CC:=$(GCCBINPATH)arm-none-eabi-gcc
|
||||||
|
AR:=$(GCCBINPATH)arm-none-eabi-ar
|
||||||
|
OBJCOPY:=$(GCCBINPATH)arm-none-eabi-objcopy
|
||||||
|
OBJDUMP:=$(GCCBINPATH)arm-none-eabi-objdump
|
||||||
|
SIZE:=$(GCCBINPATH)arm-none-eabi-size
|
||||||
|
|
||||||
|
# Common flags
|
||||||
|
COMMON_FLAGS = -mthumb -mcpu=$(MCPU)
|
||||||
|
COMMON_FLAGS += -DSTM32L031xx
|
||||||
|
COMMON_FLAGS += -Wall -I. -I$(SYSINC) -I$(U8G2INC)
|
||||||
|
# define stack size (defaults to 0x0100)
|
||||||
|
# COMMON_FLAGS += -D__STACK_SIZE=0x0100
|
||||||
|
# COMMON_FLAGS += -Os -flto
|
||||||
|
COMMON_FLAGS += -Os
|
||||||
|
# COMMON_FLAGS += -fstack-protector
|
||||||
|
# COMMON_FLAGS += -finstrument-functions
|
||||||
|
# Do not use stand libs startup code. Uncomment this for gcclib procedures
|
||||||
|
# memcpy still works, but might be required for __aeabi_uidiv
|
||||||
|
# COMMON_FLAGS += -nostdlib
|
||||||
|
# remove unused data and function
|
||||||
|
#COMMON_FLAGS += -ffunction-sections -fdata-sections -fshort-wchar
|
||||||
|
COMMON_FLAGS += -ffunction-sections -fdata-sections
|
||||||
|
# C flags
|
||||||
|
CFLAGS:=$(COMMON_FLAGS) -std=gnu99
|
||||||
|
# LD flags
|
||||||
|
# remove unreferenced procedures and variables, but __isr_vector
|
||||||
|
GC:=-Wl,--gc-sections -Wl,--undefined=__isr_vector
|
||||||
|
MAP:=-Wl,-Map=$(MAPNAME)
|
||||||
|
LFLAGS:=$(COMMON_FLAGS) $(GC) $(MAP)
|
||||||
|
#LDLIBS:=--specs=nosys.specs -lc -lc -lnosys -L$(LDSCRIPTDIR) -T $(LDSCRIPT)
|
||||||
|
LDLIBS:=--specs=nosys.specs -L$(LDSCRIPTDIR) -T $(LDSCRIPT)
|
||||||
|
|
||||||
|
# Additional Suffixes
|
||||||
|
.SUFFIXES: .elf .hex .bin .dis
|
||||||
|
|
||||||
|
# Targets
|
||||||
|
.PHONY: all
|
||||||
|
all: $(DISNAME) $(HEXNAME)
|
||||||
|
$(SIZE) $(ELFNAME)
|
||||||
|
|
||||||
|
.PHONY: upload
|
||||||
|
upload: $(DISNAME) $(HEXNAME) $(ELFNAME)
|
||||||
|
stm32flash -e 255 -g 0 -w $(HEXNAME) -v /dev/ttyUSB0
|
||||||
|
$(SIZE) $(ELFNAME)
|
||||||
|
|
||||||
|
.PHONY: clean
|
||||||
|
clean:
|
||||||
|
$(RM) $(OBJ) $(HEXNAME) $(ELFNAME) $(LIBNAME) $(DISNAME) $(MAPNAME) libssp.a libssp_nonshared.a
|
||||||
|
|
||||||
|
# implicit rules
|
||||||
|
.elf.hex:
|
||||||
|
$(OBJCOPY) -O ihex $< $@
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
# explicit rules
|
||||||
|
|
||||||
|
$(ELFNAME): $(LIBNAME)($(OBJ)) libssp.a libssp_nonshared.a
|
||||||
|
$(LINK.o) $(LFLAGS) $(LIBNAME) $(LDLIBS) -o $@
|
||||||
|
|
||||||
|
$(DISNAME): $(ELFNAME)
|
||||||
|
$(OBJDUMP) -D -S $< > $@
|
||||||
|
|
||||||
|
# create empty ssp libs for -fstack-protector-all -fstack-protector
|
||||||
|
libssp.a:
|
||||||
|
$(AR) rcs $@
|
||||||
|
|
||||||
|
libssp_nonshared.a:
|
||||||
|
$(AR) rcs $@
|
||||||
|
|
||||||
|
|
||||||
|
|
@ -0,0 +1,197 @@
|
||||||
|
/* GPIO pulse generator project for the STM32L031 */
|
||||||
|
|
||||||
|
#include "stm32l031xx.h"
|
||||||
|
|
||||||
|
/*================================================*/
|
||||||
|
/* forward declaration */
|
||||||
|
void setGPIO( uint8_t n );
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
volatile unsigned long SysTickCount = 0;
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
void __attribute__ ((interrupt, used)) SysTick_Handler(void)
|
||||||
|
{
|
||||||
|
SysTickCount++;
|
||||||
|
if ( SysTickCount & 1 )
|
||||||
|
clearGPIO();
|
||||||
|
else
|
||||||
|
setGPIO( (SysTickCount>>1) & 7 );
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
void setHSIClock()
|
||||||
|
{
|
||||||
|
|
||||||
|
|
||||||
|
/* test if the current clock source is something else than HSI */
|
||||||
|
if ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
|
||||||
|
{
|
||||||
|
/* enable HSI */
|
||||||
|
RCC->CR |= RCC_CR_HSION;
|
||||||
|
/* wait until HSI becomes ready */
|
||||||
|
while ( (RCC->CR & RCC_CR_HSIRDY) == 0 )
|
||||||
|
;
|
||||||
|
|
||||||
|
/* enable the HSI "divide by 4" bit */
|
||||||
|
RCC->CR |= (uint32_t)(RCC_CR_HSIDIVEN);
|
||||||
|
/* wait until the "divide by 4" flag is enabled */
|
||||||
|
while((RCC->CR & RCC_CR_HSIDIVF) == 0)
|
||||||
|
;
|
||||||
|
|
||||||
|
|
||||||
|
/* then use the HSI clock */
|
||||||
|
RCC->CFGR = (RCC->CFGR & (uint32_t) (~RCC_CFGR_SW)) | RCC_CFGR_SW_HSI;
|
||||||
|
|
||||||
|
/* wait until HSI clock is used */
|
||||||
|
while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_HSI)
|
||||||
|
;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* disable PLL */
|
||||||
|
RCC->CR &= (uint32_t)(~RCC_CR_PLLON);
|
||||||
|
/* wait until PLL is inactive */
|
||||||
|
while((RCC->CR & RCC_CR_PLLRDY) != 0)
|
||||||
|
;
|
||||||
|
|
||||||
|
/* set latency to 1 wait state */
|
||||||
|
FLASH->ACR |= FLASH_ACR_LATENCY;
|
||||||
|
|
||||||
|
/* At this point the HSI runs with 4 MHz */
|
||||||
|
/* Multiply by 16 device by 2 --> 32 MHz */
|
||||||
|
RCC->CFGR = (RCC->CFGR & (~(RCC_CFGR_PLLMUL| RCC_CFGR_PLLDIV ))) | (RCC_CFGR_PLLMUL16 | RCC_CFGR_PLLDIV2);
|
||||||
|
|
||||||
|
/* enable PLL */
|
||||||
|
RCC->CR |= RCC_CR_PLLON;
|
||||||
|
|
||||||
|
/* wait until the PLL is ready */
|
||||||
|
while ((RCC->CR & RCC_CR_PLLRDY) == 0)
|
||||||
|
;
|
||||||
|
|
||||||
|
/* use the PLL has clock source */
|
||||||
|
RCC->CFGR |= (uint32_t) (RCC_CFGR_SW_PLL);
|
||||||
|
/* wait until the PLL source is active */
|
||||||
|
while ((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_PLL)
|
||||||
|
;
|
||||||
|
}
|
||||||
|
|
||||||
|
void initGPIO(void)
|
||||||
|
{
|
||||||
|
RCC->IOPENR |= RCC_IOPENR_IOPAEN; /* Enable clock for GPIO Port A */
|
||||||
|
__NOP();
|
||||||
|
__NOP();
|
||||||
|
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE14; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE14_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_14; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED14; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD14; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_14; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE13; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE13_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_13; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED13; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD13; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_13; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE7; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE7_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_7; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED7; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD7; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_7; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE6; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE6_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_6; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED6; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD6; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_6; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE5; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE5_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_5; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED5; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD5; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_5; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE4; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE4_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_4; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED4; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD4; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_4; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE1; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE1_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_1; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED1; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD1; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_1; /* atomic clr */
|
||||||
|
|
||||||
|
GPIOA->MODER &= ~GPIO_MODER_MODE0; /* clear mode */
|
||||||
|
GPIOA->MODER |= GPIO_MODER_MODE0_0; /* Output mode */
|
||||||
|
GPIOA->OTYPER &= ~GPIO_OTYPER_OT_0; /* no Push/Pull */
|
||||||
|
GPIOA->OSPEEDR &= ~GPIO_OSPEEDER_OSPEED0; /* low speed */
|
||||||
|
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPD0; /* no pullup/pulldown */
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_0; /* atomic clr */
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void clearGPIO(void)
|
||||||
|
{
|
||||||
|
GPIOA->BSRR = GPIO_BSRR_BR_14
|
||||||
|
| GPIO_BSRR_BR_13
|
||||||
|
| GPIO_BSRR_BR_7
|
||||||
|
| GPIO_BSRR_BR_6
|
||||||
|
| GPIO_BSRR_BR_5
|
||||||
|
| GPIO_BSRR_BR_4
|
||||||
|
| GPIO_BSRR_BR_1
|
||||||
|
| GPIO_BSRR_BR_0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
0: PA14
|
||||||
|
1: PA13
|
||||||
|
2: PA7
|
||||||
|
3: PA6
|
||||||
|
4: PA5
|
||||||
|
5: PA4
|
||||||
|
6: PA1
|
||||||
|
7: PA0
|
||||||
|
*/
|
||||||
|
void setGPIO( uint8_t n )
|
||||||
|
{
|
||||||
|
clearGPIO();
|
||||||
|
switch(n)
|
||||||
|
{
|
||||||
|
case 0: GPIOA->BSRR = GPIO_BSRR_BS_14; break;
|
||||||
|
case 1: GPIOA->BSRR = GPIO_BSRR_BS_13; break;
|
||||||
|
case 2: GPIOA->BSRR = GPIO_BSRR_BS_7; break;
|
||||||
|
case 3: GPIOA->BSRR = GPIO_BSRR_BS_6; break;
|
||||||
|
case 4: GPIOA->BSRR = GPIO_BSRR_BS_5; break;
|
||||||
|
case 5: GPIOA->BSRR = GPIO_BSRR_BS_4; break;
|
||||||
|
case 6: GPIOA->BSRR = GPIO_BSRR_BS_1; break;
|
||||||
|
case 7: GPIOA->BSRR = GPIO_BSRR_BS_0; break;
|
||||||
|
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int main()
|
||||||
|
{
|
||||||
|
initGPIO();
|
||||||
|
|
||||||
|
setHSIClock();
|
||||||
|
|
||||||
|
SysTick->LOAD = 32000*100 - 1; // 100 ms
|
||||||
|
SysTick->VAL = 0;
|
||||||
|
SysTick->CTRL = 7; /* enable, generate interrupt (SysTick_Handler), do not divide by 2 */
|
||||||
|
|
||||||
|
for(;;)
|
||||||
|
;
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,245 @@
|
||||||
|
/*
|
||||||
|
|
||||||
|
stm32l031x6.ld
|
||||||
|
|
||||||
|
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")
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue