Init example

.envrc

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+use flake git+https://git.ghoscht.com/ghoscht/xmclib

.gitignore

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+.direnv/
+target
+result
+build/
+lib_build/

.gitmodules

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+[submodule "xmclib"]
+	path = xmclib
+	url = https://git.ghoscht.com/ghoscht/xmclib.git

Makefile

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+##### Makefile for the ESS deliverables #####
+# DO NOT CHANGE THIS FILE, IT WILL BE REPLACED BY THE ORIGINAL VERSION BEFORE GRADING #
+
+include student.mk
+
+# Compiler
+CROSS_COMPILE=arm-none-eabi
+
+CC = $(CROSS_COMPILE)-gcc
+LD = $(CROSS_COMPILE)-gcc --specs=nosys.specs
+AR = $(CROSS_COMPILE)-ar
+AS = $(CROSS_COMPILE)-as
+OC = $(CROSS_COMPILE)-objcopy
+OD = $(CROSS_COMPILE)-objdump
+SZ = $(CROSS_COMPILE)-size
+DB = $(CROSS_COMPILE)-gdb
+
+# Paths to build directories for out-of-tree build and path to LUFA USB library
+BUILDDIR = build
+LIB_BUILDDIR = lib_build
+USB_LIBDIR = $(XMC_LIBDIR)/ThirdPartyLibraries/USBlib/USB
+
+# Specify device
+XMC_SERIES=4500
+XMC_PACKAGE=F100
+XMC_SIZE=1024
+
+VPATH += $(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/BasicMathFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/CommonTables:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/ComplexMathFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/ControllerFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/FastMathFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/FilteringFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/MatrixFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/StatisticsFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/SupportFunctions:$(XMC_LIBDIR)/CMSIS/DSP_Lib/Source/TransformFunctions:$(XMC_LIBDIR)/CMSIS/Infineon/XMC$(XMC_SERIES)_series/Source:$(XMC_LIBDIR)/CMSIS/RTOS/RTX/SRC:$(XMC_LIBDIR)/CMSIS/RTOS/RTX/SRC/ARM:$(XMC_LIBDIR)/CMSIS/RTOS/RTX/Templates:$(XMC_LIBDIR)/CMSIS/RTOS/RTX/UserCodeTemplates:$(XMC_LIBDIR)/ThirdPartyLibraries/Newlib:$(XMC_LIBDIR)/XMCLib/src:$(USB_LIBDIR)/Class/Common:$(USB_LIBDIR)/Class/Device:$(USB_LIBDIR)/Common:$(USB_LIBDIR)/Core:$(USB_LIBDIR)/Core/XMC4000
+
+# Where to find CMSIS, device and XMClib header files
+CFLAGS  = -I$(XMC_LIBDIR)/CMSIS/Include/
+# Where to find device specific header files
+CFLAGS += -I$(XMC_LIBDIR)/CMSIS/Infineon/XMC$(XMC_SERIES)_series/Include/
+# Where to find XMClib headers
+CFLAGS += -I$(XMC_LIBDIR)/XMCLib/inc/
+# USB LIB Include paths
+CFLAGS += -I$(USB_LIBDIR)
+CFLAGS += -I$(USB_LIBDIR)/Class
+CFLAGS += -I$(USB_LIBDIR)/Class/Common
+CFLAGS += -I$(USB_LIBDIR)/Class/Device
+CFLAGS += -I$(USB_LIBDIR)/Common
+CFLAGS += -I$(USB_LIBDIR)/Core
+CFLAGS += -I$(USB_LIBDIR)/Core/XMC4000
+# Which device
+CFLAGS += -DXMC$(XMC_SERIES)_$(XMC_PACKAGE)x$(XMC_SIZE)
+# Which core architecture
+CFLAGS += -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -mthumb
+# Debug level and format
+CFLAGS += -g3 -gdwarf-2
+# Compile without linking
+CFLAGS += -c
+# Write separate *.lst file for each source
+CFLAGS += -Wa,-adhlns="$@.lst"
+# Until here all options are also necessary for compiling startup_XMC4500.S
+SFLAGS = $(CFLAGS)
+# Add student options, so -Wall comes after and overrides any possible -Wnone or so
+CFLAGS +=$(SCFLAGS)
+# Enable standard warnings for both
+SFLAGS += -Wall
+CFLAGS += -Wall
+# Put functions into separate sections, so they can be omitted by linker if unused
+CFLAGS += -ffunction-sections
+# Option for assembly compilation
+SFLAGS += -x assembler-with-cpp
+# Tell the linker to use our own linker script and startup files
+LFLAGS  = -T$(BUILDDIR)/$(LD_NAME).ld -nostartfiles
+# Where to find the precompiled math libraries
+LFLAGS += -L$(XMC_LIBDIR)/CMSIS/Lib/GCC/
+# Create a map file
+LFLAGS += -Wl,-Map,"$@.map"
+# Also tell the linker core architecture
+LFLAGS += -mcpu=cortex-m4 -mthumb
+# Inform about debug info
+LFLAGS += -g3 -gdwarf-2
+
+# startup files
+LIBSRCS += startup_XMC$(XMC_SERIES).c system_XMC$(XMC_SERIES).c
+# minimal syscalls definition for gcc
+LIBSRCS += syscalls.c
+
+
+# convert srcs to respective build targets
+OBJS = $(patsubst %.c,$(BUILDDIR)/%.o,$(SRCS))
+LIBOBJS = $(patsubst %.c,$(LIB_BUILDDIR)/%.o,$(LIBSRCS))
+
+.PHONY: default program debug clean
+
+PARENT_DIR := $(notdir $(abspath $(dir $(lastword $(MAKEFILE_LIST)))/../))
+NOT_PACKED := $(shell cd ..; ls | grep -xv "Part[A-Z]")
+_PACKED := $(shell cd ..; ls */*/*.elf  | tr "/" "\n" | grep "Part")
+PACKED := $(patsubst %,../%,$(_PACKED))
+
+ifneq ($(NOT_PACKED),)
+	NOT_PACKING_STRING_1 := "NOTE: NOT PACKING THE FOLLOWING FILES: "
+	NOT_PACKING_STRING_2 := "(if you want to submit them, rename to 'Part[A-Z]' and make sure your *.elf is present): "
+endif
+
+default: $(BUILDDIR)/main.elf $(BUILDDIR)/main.lst
+
+program: $(BUILDDIR)/main.hex $(BUILDDIR)/JLinkCommands
+	JLinkExe -Device XMC$(XMC_SERIES) -If SWD -Speed 1000 -CommanderScript $(BUILDDIR)/JLinkCommands
+
+debug: $(BUILDDIR)/main.elf $(BUILDDIR)/GDBCommands
+	echo "##### Debug session started at $(date) #####" >JLinkLog
+	JLinkGDBServer -device XMC$(XMC_SERIES) -endian little -if SWD -speed 1000 -halt -logtofile -log JLinkLog -silent -vd &
+	sleep 1
+	sh -ci "$(DB) -command=$(BUILDDIR)/GDBCommands -tui"
+	killall JLinkGDBServer
+
+$(BUILDDIR)/%.bin: $(BUILDDIR)/%.elf
+	$(OC) -O binary $< $@
+
+$(BUILDDIR)/%.hex: $(BUILDDIR)/%.elf
+	$(OC) -O ihex $< $@
+
+$(BUILDDIR)/%.lst: $(BUILDDIR)/%.elf
+	$(OD) -h -S $< > $@
+
+$(BUILDDIR)/%.elf: $(OBJS) $(LIBOBJS) $(BUILDDIR)/$(LD_NAME).ld
+	$(LD) $(LFLAGS) -o $@ $(OBJS) $(LIBOBJS) $(LIBLNK)
+	$(SZ) $@
+
+$(BUILDDIR)/%.o: %.c $(HDRS) | $(BUILDDIR)
+	echo "building $@"
+	$(CC) $(CFLAGS) -o $@ $<
+
+$(LIB_BUILDDIR)/%.o: %.c | $(LIB_BUILDDIR)
+	echo "building $@"
+	$(CC) $(CFLAGS) -o $@ $<
+
+# startup
+$(LIB_BUILDDIR)/startup_XMC$(XMC_SERIES).o: $(XMC_LIBDIR)/CMSIS/Infineon/XMC$(XMC_SERIES)_series/Source/GCC/startup_XMC$(XMC_SERIES).S | $(LIB_BUILDDIR)
+	$(CC) $(SFLAGS) -o $@ $<
+
+# When copying the linker description file, first try to copy one created by the student (and don't
+# complain if it does not exist), otherwise use the one from the library
+$(BUILDDIR)/$(LD_NAME).ld: $(XMC_LIBDIR)/CMSIS/Infineon/XMC$(XMC_SERIES)_series/Source/GCC/XMC$(XMC_SERIES)x$(XMC_SIZE).ld | $(BUILDDIR)
+	cp -pu $(LD_NAME).ld $@ | true
+	cp -n --preserve=timestamps $< $@
+
+$(BUILDDIR):
+	mkdir -p $@
+
+$(LIB_BUILDDIR):
+	mkdir -p $@
+
+# Write a script file for JLinkExe
+$(BUILDDIR)/JLinkCommands: | $(BUILDDIR)
+	echo "h;loadfile ${BUILDDIR}/main.hex;r;g;q;" | sed 's/;/\n/g' > $(BUILDDIR)/JLinkCommands
+
+# Write a script file for GDB
+$(BUILDDIR)/GDBCommands: | $(BUILDDIR)
+	echo "file ${BUILDDIR}/main.elf;target remote localhost:2331;monitor reset;load;break main;" | sed 's/;/\n/g' > $(BUILDDIR)/GDBCommands
+
+deliverable:
+	@echo "packing deliverable"
+	@echo $(NOT_PACKING_STRING_1)
+	@echo $(NOT_PACKED)
+	@echo $(NOT_PACKING_STRING_2)
+	@echo ""
+	@zip ../$(PARENT_DIR).zip -r $(PACKED)
+
+clean:
+	rm -rf $(BUILDDIR)
+
+clean_all:
+	rm -rf $(BUILDDIR) $(LIB_BUILDDIR)
+

dimming.c

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+#include <xmc_common.h>
+
+void initCCU4(void);
+void connectLED(void);
+
+int main(void) {
+
+  initCCU4();
+
+  while (1) {
+  };
+  return 0;
+}
+
+void initCCU4() {
+  // step2: release reset of CCU40, all following lines are equal
+  //*(0x500414) = 0b100;
+  // SCU_RESET->PRCLR0 = 0b100;
+  SCU_RESET->PRCLR0 = SCU_RESET_PRCLR0_CCU40RS_Msk;
+
+  // step 3
+  SCU_CLK->CLKSET = SCU_CLK_CLKSET_CCUCEN_Msk;
+
+  // step 4
+  CCU40->GIDLC = CCU4_GIDLC_SPRB_Msk;
+
+  // step 6: period value & compare value for PWM
+  // choose 0xffff to be most flexible & granular
+  CCU40_CC42->PRS = 0xffff;
+  // CCU40_CC42->PSC = 0b1010;
+  CCU40_CC42->CRS = 0xffff * (1 - 0.1);
+  CCU40->GCSS = CCU4_GCSS_S2SE_Msk;
+
+  // connect led before CCU is started
+  connectLED();
+
+  // step 8
+  CCU40->GIDLC = CCU4_GIDLC_CS2I_Msk;
+
+  // step 9
+  CCU40_CC42->TCSET = CCU4_CC4_TCSET_TRBS_Msk;
+}
+
+void connectLED() {
+  const static uint8_t ALT3 = 0b10011;
+  PORT1->IOCR0 =
+      (PORT1->IOCR0 & ~PORT0_IOCR0_PC1_Msk) | (ALT3 << PORT0_IOCR0_PC1_Pos);
+}

student.mk

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+##### Student Makefile for the ESS deliverables #####
+# Change this file to match your requirements
+
+# Name of your project
+LD_NAME = dimming
+
+# Add lists of space separated source files
+# Own sources, e.g. main.c
+SRCS = dimming.c
+# Library sources, e.g. xmc_gpio.c
+LIBSRCS = 
+# Precompiled libraries, e.g. -lm for math functions
+LIBLNK =
+
+# Change this line if the path to your XMC-Library differs, it will be overwritten before grading to
+# match the system the grading is performed on.
+XMC_LIBDIR = /home/ghoscht/Coding/embedded/ccu/xmclib/
+
+# Language dialect
+SCFLAGS  = -std=gnu99
+# Optimization level, remember that enabling optimization will stirr up the assembly code and thus
+# debugging is more difficult
+SCFLAGS += -O0
+# If you like, you can enable even more warnings, e.g. -Wextra, but for grading -Wall will be used
+SCFLAGS +=
+

xmclib

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+Subproject commit 5fd71915274f4f9bfdab552d301f5f3bc99134c1