# STM32 library paths
F1_LIB_PATH=/opt/tools/STM32F10X_Lib
F4_LIB_PATH=/opt/tools/STM32F4XX_Lib

# MCU external clock frequency (Hz)
CLK_PI_F4=12000000
CLK_DEF=8000000

# Directory Structure
BINDIR=.
OBJDIR_F1=obj_f1
OBJDIR_F4=obj_f4

# Output files
BINELF_F1=dvm-firmware-hs_f1.elf
BINHEX_F1=dvm-firmware-hs_f1.hex
BINBIN_F1=dvm-firmware-hs_f1.bin
BINELF_F1BL=dvm-firmware-hs_f1bl.elf
BINHEX_F1BL=dvm-firmware-hs_f1bl.hex
BINBIN_F1BL=dvm-firmware-hs_f1bl.bin
BINELF_F1NOBL=dvm-firmware-hs_f1nobl.elf
BINHEX_F1NOBL=dvm-firmware-hs_f1nobl.hex
BINBIN_F1NOBL=dvm-firmware-hs_f1nobl.bin
BINELF_F4=dvm-firwmare-hs_f4.elf
BINHEX_F4=dvm-firmware-hs_f4.hex
BINBIN_F4=dvm-firmware-hs_f4.bin

# Header directories
INC_F1= . $(F1_LIB_PATH)/CMSIS/ $(F1_LIB_PATH)/Device/ $(F1_LIB_PATH)/STM32F10x_StdPeriph_Driver/inc/ $(F1_LIB_PATH)/usb/inc/
INCLUDES_F1=$(INC_F1:%=-I%)
INC_F4= . $(F4_LIB_PATH)/CMSIS/Include/ $(F4_LIB_PATH)/Device/ $(F4_LIB_PATH)/STM32F4xx_StdPeriph_Driver/include/
INCLUDES_F4=$(INC_F4:%=-I%)

# CMSIS libraries
INCLUDES_LIBS_F1=
INCLUDES_LIBS_F4=$(F4_LIB_PATH)/CMSIS/Lib/GCC/libarm_cortexM4lf_math.a

# STM32F1 Standard Peripheral Libraries source path
STD_LIB_F1=$(F1_LIB_PATH)/STM32F10x_StdPeriph_Driver/src

# STM32F1 USB support source path
USB_F1=$(F1_LIB_PATH)/usb

# STM32F4 Standard Peripheral Libraries source path
STD_LIB_F4=$(F4_LIB_PATH)/STM32F4xx_StdPeriph_Driver/source

# STM32F1 system source path
SYS_DIR_F1=$(F1_LIB_PATH)/Device
STARTUP_DIR_F1=$(F1_LIB_PATH)/Device/startup

# STM32F4 system source path
SYS_DIR_F4=$(F4_LIB_PATH)/Device
STARTUP_DIR_F4=$(F4_LIB_PATH)/Device/startup

# GNU ARM Embedded Toolchain
CC=arm-none-eabi-gcc
CXX=arm-none-eabi-g++
LD=arm-none-eabi-ld
AR=arm-none-eabi-ar
AS=arm-none-eabi-as
CP=arm-none-eabi-objcopy
OD=arm-none-eabi-objdump
NM=arm-none-eabi-nm
SIZE=arm-none-eabi-size
A2L=arm-none-eabi-addr2line

# Default reference oscillator frequencies
ifndef $(OSC)
	ifeq ($(MAKECMDGOALS),pi-f4)
		OSC=$(CLK_PI_F4)
	else
		OSC=$(CLK_DEF)
	endif
endif

# Build object lists
CXXSRC=$(wildcard ./*.cpp) $(wildcard ./dmr/*.cpp) $(wildcard ./p25/*.cpp)
CSRC_STD_F1=$(wildcard $(STD_LIB_F1)/*.c)
SYS_F1=$(wildcard $(SYS_DIR_F1)/*.c)
STARTUP_F1=$(wildcard $(STARTUP_DIR_F1)/*.c)
CXX_USB_F1=$(wildcard $(USB_F1)/*.cpp)
C_USB_F1=$(wildcard $(USB_F1)/*.c)
CSRC_STD_F4=$(wildcard $(STD_LIB_F4)/*.c)
SYS_F4=$(wildcard $(SYS_DIR_F4)/*.c)
STARTUP_F4=$(wildcard $(STARTUP_DIR_F4)/*.c)
OBJ_F1=$(CXXSRC:./%.cpp=$(OBJDIR_F1)/%.o) $(CSRC_STD_F1:$(STD_LIB_F1)/%.c=$(OBJDIR_F1)/%.o) $(SYS_F1:$(SYS_DIR_F1)/%.c=$(OBJDIR_F1)/%.o) $(STARTUP_F1:$(STARTUP_DIR_F1)/%.c=$(OBJDIR_F1)/%.o) 
OBJ_F1BL=$(CXXSRC:./%.cpp=$(OBJDIR_F1)/%.o) $(CSRC_STD_F1:$(STD_LIB_F1)/%.c=$(OBJDIR_F1)/%.o) $(SYS_F1:$(SYS_DIR_F1)/%.c=$(OBJDIR_F1)/%.o) $(STARTUP_F1:$(STARTUP_DIR_F1)/%.c=$(OBJDIR_F1)/%.o) $(CXX_USB_F1:$(USB_F1)/%.cpp=$(OBJDIR_F1)/%.o) $(C_USB_F1:$(USB_F1)/%.c=$(OBJDIR_F1)/%.o)
OBJ_F4=$(CXXSRC:./%.cpp=$(OBJDIR_F4)/%.o) $(CSRC_STD_F4:$(STD_LIB_F4)/%.c=$(OBJDIR_F4)/%.o) $(SYS_F4:$(SYS_DIR_F4)/%.c=$(OBJDIR_F4)/%.o) $(STARTUP_F4:$(STARTUP_DIR_F4)/%.c=$(OBJDIR_F4)/%.o)

# MCU flags
MCFLAGS_F1=-mcpu=cortex-m3 -march=armv7-m -mthumb
MCFLAGS_F4=-mcpu=cortex-m4 -mthumb -mlittle-endian -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb-interwork

# Compile flags
DEFS_F1_HS=-DUSE_STDPERIPH_DRIVER -DSTM32F10X_MD -DHSE_VALUE=$(OSC) -DVECT_TAB_OFFSET=0x0 -DMADEBYMAKEFILE
DEFS_F1_HS_BL=-DUSE_STDPERIPH_DRIVER -DSTM32F10X_MD -DHSE_VALUE=$(OSC) -DVECT_TAB_OFFSET=0x2000 -DMADEBYMAKEFILE
# STM32F446 Pi-Hat board:
DEFS_PI_F4=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_PI -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE
# STM32F4 Nucleo-64 F446RE board:
DEFS_F446=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DSTM32F446xx -DSTM32F4_NUCLEO -DHSE_VALUE=$(OSC) -DMADEBYMAKEFILE

# Build compiler flags
CFLAGS_F1=-c $(MCFLAGS_F1) $(INCLUDES_F1)
CXXFLAGS_F1=-c $(MCFLAGS_F1) $(INCLUDES_F1)
CFLAGS_F4=-c $(MCFLAGS_F4) $(INCLUDES_F4)
CXXFLAGS_F4=-c $(MCFLAGS_F4) $(INCLUDES_F4)
# Linker flags
LDFLAGS_F1_N =-T normal.ld $(MCFLAGS_F1) $(INCLUDES_LIBS_F1)
LDFLAGS_F1_BL =-T bootloader.ld $(MCFLAGS_F1) $(INCLUDES_LIBS_F1)
LDFLAGS_F4 =-T stm32f4xx_link.ld $(MCFLAGS_F4) $(INCLUDES_LIBS_F4)

# Common flags
CFLAGS=-Os -ffunction-sections -fdata-sections -fno-builtin -Wno-implicit -DCUSTOM_NEW -DNO_EXCEPTIONS
CXXFLAGS=-Os -fno-exceptions -ffunction-sections -fdata-sections -fno-builtin -fno-rtti -DCUSTOM_NEW -DNO_EXCEPTIONS
LDFLAGS=-Os --specs=nano.specs --specs=nosys.specs

# Build Rules
.PHONY: all release_f1 release_f4 hs bl nobl pi-f4 f446 clean

all: hs

#error "Either PI_HAT_7021_REV_02, ZUMSPOT_ADF7021, LONESTAR_USB, MMDVM_HS_HAT_REV12, MMDVM_HS_DUAL_HAT_REV10, NANO_HOTSPOT, NANO_DV_REV11, or SKYBRIDGE_HS

zumspot-adf7021: CFLAGS+=-DZUMSPOT_ADF7021 -DSTM32_USART1_HOST
zumspot-adf7021: CXXFLAGS+=-DZUMSPOT_ADF7021 -DSTM32_USART1_HOST
zumspot-adf7021: hs
zumspot-adf7021-duplex: CFLAGS+=-DDUPLEX
zumspot-adf7021-duplex: CXXFLAGS+=-DDUPLEX
zumspot-adf7021-duplex: zumspot-adf7021
zumspot-adf7021-usb: CFLAGS+=-DZUMSPOT_ADF7021 -DSTM32_USB_HOST
zumspot-adf7021-usb: CXXFLAGS+=-DZUMSPOT_ADF7021 -DSTM32_USB_HOST
zumspot-adf7021-usb: bl
zumspot-adf7021-usb-duplex: CFLAGS+=-DDUPLEX
zumspot-adf7021-usb-duplex: CXXFLAGS+=-DDUPLEX
zumspot-adf7021-usb-duplex: zumspot-adf7021-usb

pihat-7021-r2: CFLAGS+=-DPI_HAT_7021_REV_02 -DSTM32_USART1_HOST
pihat-7021-r2: CXXFLAGS+=-DZUMSPOT_ADF7021 -DSTM32_USART1_HOST
pihat-7021-r2: hs
pihat-7021-r2-duplex: CFLAGS+=-DDUPLEX
pihat-7021-r2-duplex: CXXFLAGS+=-DDUPLEX
pihat-7021-r2-duplex: pihat-7021-r2

lonestar-usb: CFLAGS+=-DLONESTAR_USB -DSTM32_USB_HOST
lonestar-usb: CXXFLAGS+=-DLONESTAR_USB -DSTM32_USB_HOST
lonestar-usb: bl

mmdvm-hs-hat: CFLAGS+=-DMMDVM_HS_HAT_REV12 -DSTM32_USART1_HOST
mmdvm-hs-hat: CXXFLAGS+=-DMMDVM_HS_HAT_REV12 -DSTM32_USART1_HOST
mmdvm-hs-hat: hs
mmdvm-hs-hat-dual: CFLAGS+=-DDUPLEX
mmdvm-hs-hat-dual: CXXFLAGS+=-DDUPLEX
mmdvm-hs-hat-dual: mmdvm-hs-hat
mmdvm-hs-hat-usb: CFLAGS+=-DMMDVM_HS_HAT_REV12 -DSTM32_USB_HOST
mmdvm-hs-hat-usb: CXXFLAGS+=-DMMDVM_HS_HAT_REV12 -DSTM32_USB_HOST
mmdvm-hs-hat-usb: bl
mmdvm-hs-hat-usb-dual: CFLAGS+=-DDUPLEX
mmdvm-hs-hat-usb-dual: CXXFLAGS+=-DDUPLEX
mmdvm-hs-hat-usb-dual: mmdvm-hs-hat-usb

hs: CFLAGS+=$(CFLAGS_F1) $(DEFS_F1_HS)
hs: CXXFLAGS+=$(CXXFLAGS_F1) $(DEFS_F1_HS)
hs: LDFLAGS+=$(LDFLAGS_F1_N)
hs: release_f1

bl: CFLAGS+=$(CFLAGS_F1) $(DEFS_F1_HS_BL)
bl: CXXFLAGS+=$(CXXFLAGS_F1) $(DEFS_F1_HS_BL)
bl: LDFLAGS+=$(LDFLAGS_F1_BL)
bl: release_f1bl

nobl: CFLAGS+=$(CFLAGS_F1) $(DEFS_F1_HS)
nobl: CXXFLAGS+=$(CXXFLAGS_F1) $(DEFS_F1_HS)
nobl: LDFLAGS+=$(LDFLAGS_F1_N)
nobl: release_f1nobl

release_f1: $(BINDIR)
release_f1: $(OBJDIR_F1)
release_f1: $(BINDIR)/$(BINBIN_F1)

release_f1bl: $(BINDIR)
release_f1bl: $(OBJDIR_F1)
release_f1bl: $(BINDIR)/$(BINBIN_F1BL)

release_f1nobl: $(BINDIR)
release_f1nobl: $(OBJDIR_F1)
release_f1nobl: $(BINDIR)/$(BINBIN_F1NOBL)

release_f4: $(BINDIR)
release_f4: $(OBJDIR_F4)
release_f4: $(BINDIR)/$(BINBIN_F4)

$(BINDIR):
	mkdir $@
$(OBJDIR_F1):
	mkdir $@
	mkdir $@/dmr
	mkdir $@/p25
$(OBJDIR_F4):
	mkdir $@
	mkdir $@/dmr
	mkdir $@/p25

$(BINDIR)/$(BINBIN_F1BL): $(BINDIR)/$(BINELF_F1BL)
	$(CP) -O binary $< $@
$(BINDIR)/$(BINELF_F1BL): $(OBJ_F1BL)
	$(CXX) $(OBJ_F1BL) $(LDFLAGS) -o $@
	$(SIZE) $(BINDIR)/$(BINELF_F1BL)

$(BINDIR)/$(BINBIN_F1NOBL): $(BINDIR)/$(BINELF_F1NOBL)
	$(CP) -O binary $< $@
$(BINDIR)/$(BINELF_F1NOBL): $(OBJ_F1BL)
	$(CXX) $(OBJ_F1BL) $(LDFLAGS) -o $@
	$(SIZE) $(BINDIR)/$(BINELF_F1NOBL)

$(BINDIR)/$(BINBIN_F1): $(BINDIR)/$(BINELF_F1)
	$(CP) -O binary $< $@
$(BINDIR)/$(BINELF_F1): $(OBJ_F1)
	$(CXX) $(OBJ_F1) $(LDFLAGS) -o $@
	$(SIZE) $(BINDIR)/$(BINELF_F1)

$(BINDIR)/$(BINBIN_F4): $(BINDIR)/$(BINELF_F4)
	$(CP) -O binary $< $@
$(BINDIR)/$(BINELF_F4): $(OBJ_F4)
	$(CXX) $(OBJ_F4) $(LDFLAGS) -o $@
	$(SIZE) $(BINDIR)/$(BINELF_F4)

$(OBJDIR_F1)/%.o: ./%.cpp
	$(CXX) $(CXXFLAGS) $< -o $@
$(OBJDIR_F4)/%.o: ./%.cpp
	$(CXX) $(CXXFLAGS) $< -o $@
$(OBJDIR_F1)/%.o: $(STD_LIB_F1)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F4)/%.o: $(STD_LIB_F4)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F1)/%.o: $(SYS_DIR_F1)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F1)/%.o: $(STARTUP_DIR_F1)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F4)/%.o: $(SYS_DIR_F4)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F4)/%.o: $(STARTUP_DIR_F4)/%.c
	$(CC) $(CFLAGS) $< -o $@
$(OBJDIR_F1)/%.o: $(USB_F1)/%.cpp
	$(CXX) $(CXXFLAGS) $< -o $@
$(OBJDIR_F1)/%.o: $(USB_F1)/%.c
	$(CC) $(CFLAGS) $< -o $@

clean-objs:
	test ! -d $(OBJDIR_F1) || rm -rf $(OBJDIR_F1)
	test ! -d $(OBJDIR_F4) || rm -rf $(OBJDIR_F4)
clean:
	test ! -d $(OBJDIR_F1) || rm -rf $(OBJDIR_F1)
	test ! -d $(OBJDIR_F4) || rm -rf $(OBJDIR_F4)
	rm -f $(BINDIR)/*.bin $(BINDIR)/*.elf

stlink:
	$(ST_FLASH) $(ST_FLASH_OPTS) write bin/$(BINBIN_F1) 0x8000000

stlink-nobl:
	$(ST_FLASH) $(ST_FLASH_OPTS) write bin/$(BINBIN_F1NOBL) 0x8000000

stlink-bl:
	$(ST_FLASH) $(ST_FLASH_OPTS) write $(F1_LIB_PATH)/utils/bootloader/generic_boot20_pc13_long_rst.bin 0x8000000
	sleep 3
	$(ST_FLASH) $(ST_FLASH_OPTS) write bin/$(BINBIN_F1BL) 0x8002000

stlink-bl-old:
	$(ST_FLASH) $(ST_FLASH_OPTS) write $(F1_LIB_PATH)/utils/bootloader/generic_boot20_pc13.bin 0x8000000
	sleep 3
	$(ST_FLASH) $(ST_FLASH_OPTS) write bin/$(BINBIN_F1BL) 0x8002000

serial:
	$(STM32FLASH) -v -w bin/$(BINBIN_F1) -g 0x0 $(devser)

serial-nobl:
	$(STM32FLASH) -v -w bin/$(BINBIN_F1NOBL) -g 0x0 $(devser)

serial-bl:
	$(STM32FLASH) -v -w $(F1_LIB_PATH)/utils/bootloader/generic_boot20_pc13_long_rst.bin -g 0x0 $(devser)
	sleep 3
	$(STM32FLASH) -v -w bin/$(BINBIN_F1BL) -g 0x0 -S 0x08002000 $(devser)

serial-bl-old:
	$(STM32FLASH) -v -w $(F1_LIB_PATH)/utils/bootloader/generic_boot20_pc13.bin -g 0x0 $(devser)
	sleep 3
	$(STM32FLASH) -v -w bin/$(BINBIN_F1BL) -g 0x0 -S 0x08002000 $(devser)