Max Regan
a7f1ffc1b5
The display currently shows the time, with hours and minutes, and is capable of receiving input with buttons (though does nothing). It sleeps during intervals where nothing is happening. The display task runs once per second, and RTC alarm A is used for periodic alarms to update the system time.
150 lines
4.0 KiB
Makefile
150 lines
4.0 KiB
Makefile
# Copyright 2019, Max Regan
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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#
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# Tools
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#
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TOOL_PREFIX ?= arm-none-eabi-
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CC = $(TOOL_PREFIX)gcc
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CXX = $(TOOL_PREFIX)g++
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CPP = $(TOOL_PREFIX)cpp
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AS = $(TOOL_PREFIX)as
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LD = $(TOOL_PREFIX)g++
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OBJCOPY = $(TOOL_PREFIX)objcopy
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STM32_PROG = STM32_Programmer.sh
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#
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# Device Variables
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#
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DEVICE_TYPE ?= stm32l031k6
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DEVICE_FAMILY = stm32l031xx
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DEVICE_LINE = stm32l0xx
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#
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# Filenames and paths
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#
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# Ignores dotfiles and other garbage some tools leave behind
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define find_important
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$(shell find $(1) -type f -and -name $(2) -and -not -iname "*~" -and -not -iname "*#*" -and -not \( -path "*.cquery_cached_index*" \) )
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endef
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C_SOURCES := $(call find_important, $(SOURCEDIR), '*.c')
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CXX_SOURCES := $(call find_important, $(SOURCEDIR), '*.cpp')
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S_SOURCES := $(call find_important, $(SOURCEDIR), '*.s')
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SPP_SOURCES := $(DEVICE_TYPE).S
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SOURCES = $(C_SOURCES) $(S_SOURCES) $(SPP_SOURCES) $(CPP_SOURCES)
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C_OBJS := $(patsubst %.c,%.o,$(C_SOURCES))
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CXX_OBJS := $(patsubst %.cpp,%.o,$(CXX_SOURCES))
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S_OBJS := $(patsubst %.s,%.o,$(S_SOURCES))
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SPP_OBJS := $(patsubst %.S,%.o,$(SPP_SOURCES))
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OBJS = $(C_OBJS) $(S_OBJS) $(SPP_OBJS) $(CXX_OBJS)
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LINKER_SCRIPT ?= $(DEVICE_TYPE).ld
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OUTPUT_NAME ?= watch
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OUTPUT_BIN ?= $(OUTPUT_NAME).bin
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OUTPUT_ELF ?= $(OUTPUT_NAME).elf
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#
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# Flags
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#
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DEVICE_DEFINE = $(subst XX,xx,$(shell echo $(DEVICE_FAMILY) | tr '[:lower:]' '[:upper:]'))
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CPU_FLAGS = -mthumb -mcpu=cortex-m0 -mfloat-abi=soft
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# C pedantism
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CFLAGS = -Wall -Wextra -Wpedantic
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# Debug/optimization
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CFLAGS += -ggdb -g3 -Os
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CFLAGS += -fdata-sections -ffunction-sections
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# Architecture
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CFLAGS += $(CPU_FLAGS)
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CFLAGS += -ffreestanding
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# Defines
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CFLAGS += -D$(DEVICE_DEFINE)
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# Includes
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CFLAGS += -I./lib/stm32/$(DEVICE_LINE)/Include
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CFLAGS += -I./lib/CMSIS/Core/Include
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CFLAGS += -I./lib/fonts/
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CXX_FLAGS = -std=c++14 -fno-exceptions -fno-rtti
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# Startup Definitions
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ASFLAGS += $(CPU_FLAGS)
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ASFLAGS += -D__STARTUP_CLEAR_BSS
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ASFLAGS += -D__HEAP_SIZE=0 # No heap- let the linker decide it all
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LDFLAGS += $(CPU_FLAGS)
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LDFLAGS += -Wl,--gc-sections -Wl,--build-id=none -static
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LDFLAGS += -Wl,--wrap=malloc -Wl,--wrap=free # Fail to link if dynamic allocation is sneaking through
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LDFLAGS += -Wl,-print-memory-usage
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#
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# Default Target
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#
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.PHONY: build
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build: $(OUTPUT_BIN)
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#
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# Build Logic
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#
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%.o: %.c
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@echo "CC $@"
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@$(CC) $(CFLAGS) -c $< -o $@
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%.o: %.S
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@echo "AS $@"
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@$(CC) $(ASFLAGS) -c $< -o $@
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%.o: %.cpp
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@echo "CXX $@"
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@$(CXX) $(CXX_FLAGS) $(CFLAGS) -c $< -o $@
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$(OUTPUT_BIN): $(OUTPUT_ELF)
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@echo "OBJCOPY $@"
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@$(OBJCOPY) -O binary $(OUTPUT_ELF) $(OUTPUT_BIN)
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$(OUTPUT_ELF): $(LINKER_SCRIPT) $(OBJS)
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@echo "LD $@"
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$(LD) -T $(LINKER_SCRIPT) $(LDFLAGS) -o $(OUTPUT_ELF) $(OBJS)
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#
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# Utilities
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#
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STM32FLASH_DEVICE = /dev/ttyUSB0
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.PHONY: flash
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flash: $(OUTPUT_BIN)
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@echo "FLASH $(OUTPUT_BIN)"
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$(STM32_PROG) --connect port=SWD reset=Hwrst -w $(OUTPUT_BIN) 0x8000000 -v --go
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.PHONY: clean
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clean:
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@echo "RM $(OBJS)"
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@rm -f $(OBJS) $(OUTPUT_BIN) $(OUTPUT_ELF)
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