usb_serial Makefile problem (Teensy 3.1)

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marktrayle

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Hi,
I'm trying to make the usb_serial example under OS X 10.9.1. I edited the Makefile
to set the MCU to Teensy 3.1s, like so...

MCU = __MX20DX256__ # Teensy 3.1

... on running make I get this...

Compiling C: example.c
avr-gcc -c -mmcu=__MX20DX256__ -I. -gdwarf-2 -DF_CPU=96000000UL -Os -funsigned-char -funsigned-bitfields -ffunction-sections -fpack-struct -fshort-enums -Wall -Wstrict-prototypes -Wa,-adhlns=./example.lst -std=gnu99 -MMD -MP -MF .dep/example.o.d example.c -o example.o
avr-gcc: error: unrecognized argument in option '-mmcu=__MX20DX256__'
avr-gcc: note: valid arguments to '-mmcu=' are: at43usb320 at43usb355 (and on and on with a long list of MCUs)

I have the latest avr-gcc (20131216).
Any ideas why the MCU isn't recognized?

thanks,
Mark
 
Thanks Headroom, but I still get the same error.
Anyone have a working Makefile for Teensy 3.1 I could use as a template?
 
Here is the Makefile I am using. It is a derivative of the sample in ...\arduino-1.0.5\hardware\teensy\cores\teensy3. You have to copy the .c and .h files from that same directory to the directory of the Makefile. Not sure how many of those files I really need; I just left them all in. Clumsy, but it works and disk space is cheap.

I have commented out the changes I made from the original sample. I couldn't get the automatic download to work (I'm on Windows XP and I think it doesn't like the spaces in the filepath. ) So I just press the button to download.

Good Luck!

Code: 
# The name of your project (used to name the compiled .hex file)
TARGET = main

# configurable options
OPTIONS = -DF_CPU=48000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH

# options needed by many Arduino libraries to configure for Teensy 3.0
#OPTIONS += -D__MK20DX128__ -DARDUIO=104
# options needed by many Arduino libraries to configure for Teensy 3.0
OPTIONS += -D__MK20DX256__ -DARDUIO=105


#************************************************************************
# Location of Teensyduino utilities, Toolchain, and Arduino Libraries.
# To use this makefile without Arduino, copy the resources from these
# locations and edit the pathnames.  The rest of Arduino is not needed.
#************************************************************************

# path location for Teensy Loader, teensy_post_compile and teensy_reboot
TOOLSPATH = ../../../../ARM/Arduino/arduino-1.0.5/hardware/tools   
#TOOLSPATH = C:/Documents and Settings/Administrator/My Documents/ARM/Arduino/arduino-1.0.5/hardware/tools

# path location for the arm-none-eabi compiler
#COMPILERPATH = ../../../ARM/Arduino/arduino-1.0.5/hardware/tools/arm-none-eabi/bin
COMPILERPATH = C:/Documents and Settings/Administrator/My Documents/ARM/Arduino/arduino-1.0.5/hardware/tools/arm-none-eabi/bin

INCPATH = C:/Documents and Settings/Administrator/My Documents/ARM/Arduino/arduino-1.0.5/hardware/teensy/cores/teensy3

#************************************************************************
# Settings below this point usually do not need to be edited
#************************************************************************

# CPPFLAGS = compiler options for C and C++
CPPFLAGS = -Wall -g -Os -mcpu=cortex-m4 -mthumb -nostdlib -MMD $(OPTIONS) -I.

# compiler options for C++ only
CXXFLAGS = -std=gnu++0x -felide-constructors -fno-exceptions -fno-rtti

# compiler options for C only
CFLAGS =

# linker options
# LDFLAGS = -Os -Wl,--gc-sections -mcpu=cortex-m4 -mthumb -Tmk20dx128.ld  # Teensy 3.0
LDFLAGS = -Os -Wl,--gc-sections -mcpu=cortex-m4 -mthumb -Tmk20dx256.ld  # Teensy 3.1

# additional libraries to link
LIBS = -lm


# names for the compiler programs
#CC = $(abspath $(COMPILERPATH))/arm-none-eabi-gcc
#CXX = $(abspath $(COMPILERPATH))/arm-none-eabi-g++
#OBJCOPY = $(abspath $(COMPILERPATH))/arm-none-eabi-objcopy
#SIZE = $(abspath $(COMPILERPATH))/arm-none-eabi-size

CC = $(COMPILERPATH)/arm-none-eabi-gcc
CXX = $(COMPILERPATH)/arm-none-eabi-g++
OBJCOPY = $(COMPILERPATH)/arm-none-eabi-objcopy
SIZE = $(COMPILERPATH)/arm-none-eabi-size

# automatically create lists of the sources and objects
# TODO: this does not handle Arduino libraries yet...
C_FILES := $(wildcard *.c)
CPP_FILES := $(wildcard *.cpp)
OBJS := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o)


# the actual makefile rules (all .o files built by GNU make's default implicit rules)

all: $(TARGET).hex

# Teensy 3.0
# $(TARGET).elf: $(OBJS) mk20dx128.ld
# Teensy 3.1
$(TARGET).elf: $(OBJS) mk20dx256.ld
	$(CC) $(LDFLAGS) -o $@ $(OBJS) $(LIBS)

%.hex: %.elf
	$(SIZE) $<
	$(OBJCOPY) -O ihex -R .eeprom $< $@
#	$(TOOLSPATH)/teensy_post_compile -file=$(basename $@) -path=$(shell pwd) -tools=$(TOOLSPATH) -$(TOOLSPATH)/teensy_reboot
#	$(abspath $(TOOLSPATH))/teensy_post_compile -file=$(basename $@) -path=$(shell pwd) -tools=$(abspath $(TOOLSPATH))
#	-$(abspath $(TOOLSPATH))/teensy_reboot


# compiler generated dependency info
-include $(OBJS:.o=.d)

clean:
	rm -f *.o *.d $(TARGET).elf $(TARGET).hex
 
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