rewrote makefile (standalone now); removed some unnecessary stuff
parent
cae0560e04
commit
502fa3a79f
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@ -1,3 +1,9 @@
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*~
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*.swp
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*.hex
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*.eep
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*.elf
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*.o
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*.o.dep
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@ -86,6 +86,10 @@
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by Randy Meyers
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(on <http://drdobbs.com/>)
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* [gcc: why the -lm flag is needed to link the math library?]
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(http://stackoverflow.com/questions/4606301/gcc-why-the-lm-flag-is-needed-to-link-the-math-library)
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(on <http://stackoverflow.com/>)
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### For the AVR
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* [AVR Newbie guide]
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@ -103,6 +107,17 @@
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(https://www.mainframe.cx/~ckuethe/avr-c-tutorial/)
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by Chris Kuethe
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* [Optimisations of AVR programs using avr-gcc]
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(http://www.tty1.net/blog/2008-04-29-avr-gcc-optimisations_en.html)
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* [Using the EEPROM memory in AVR-GCC]
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(http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=38417)
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: tutorial by [Dean Camera] (http://fourwalledcubicle.com/AboutMe.php)
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(on <http://www.avrfreaks.net/>)
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* updated version available as a pdf at [Four Walled Cubicle : AVR Articles]
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(http://www.fourwalledcubicle.com/AVRArticles.php), along with a few other good articles on AVR programming
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## Protocol Stuff
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@ -187,6 +202,12 @@
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* [LUFA (2012) (Lightweight USB Framework for AVRs)]
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(http://www.fourwalledcubicle.com/LUFA.php)
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* zip: [PJRC: usb_keyboard]
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(http://pjrc.com/teensy/usb_keyboard.zip)
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* mentioned on [the PJRC website]
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(http://pjrc.com/teensy/usb_keyboard.html)
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### TWI Libraries
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* github: [TWI library in C]
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@ -206,14 +227,6 @@
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(https://github.com/maniacbug/Arduino/tree/master/libraries/MCP23018)
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: library in C++
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### USB
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* zip: [PJRC: usb_keyboard]
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(http://pjrc.com/teensy/usb_keyboard.zip)
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* mentioned on [the PJRC website]
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(http://pjrc.com/teensy/usb_keyboard.html)
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### Other
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* zip: [PJRC: blinky]
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@ -45,6 +45,9 @@ buy!), please stop by. :) .
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for instructions on how to set up an AVR programming environment. This
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project uses C (not Arduino).
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* I also assume that you are using [git] (http://git-scm.com/) (for `make
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clean`).
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-------------------------------------------------------------------------------
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@ -1,614 +0,0 @@
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# Hey Emacs, this is a -*- makefile -*-
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#----------------------------------------------------------------------------
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# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
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#
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# Released to the Public Domain
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#
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# Additional material for this makefile was written by:
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# Peter Fleury
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# Tim Henigan
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# Colin O'Flynn
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# Reiner Patommel
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# Markus Pfaff
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# Sander Pool
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# Frederik Rouleau
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# Carlos Lamas
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#
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#----------------------------------------------------------------------------
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# On command line:
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#
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# make all = Make software.
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#
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# make clean = Clean out built project files.
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#
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# make coff = Convert ELF to AVR COFF.
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#
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# make extcoff = Convert ELF to AVR Extended COFF.
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#
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# make program = Download the hex file to the device, using avrdude.
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# Please customize the avrdude settings below first!
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#
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# make debug = Start either simulavr or avarice as specified for debugging,
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# with avr-gdb or avr-insight as the front end for debugging.
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#
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# make filename.s = Just compile filename.c into the assembler code only.
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#
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# make filename.i = Create a preprocessed source file for use in submitting
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# bug reports to the GCC project.
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#
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# To rebuild project do "make clean" then "make all".
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#----------------------------------------------------------------------------
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# Target file name (without extension).
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TARGET = example
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# List C source files here. (C dependencies are automatically generated.)
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SRC = $(TARGET).c \
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usb_keyboard.c
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# MCU name, you MUST set this to match the board you are using
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# type "make clean" after changing this, so all files will be rebuilt
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#
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#MCU = at90usb162 # Teensy 1.0
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MCU = atmega32u4 # Teensy 2.0
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#MCU = at90usb646 # Teensy++ 1.0
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#MCU = at90usb1286 # Teensy++ 2.0
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# Processor frequency.
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# Normally the first thing your program should do is set the clock prescaler,
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# so your program will run at the correct speed. You should also set this
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# variable to same clock speed. The _delay_ms() macro uses this, and many
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# examples use this variable to calculate timings. Do not add a "UL" here.
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F_CPU = 16000000
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# Output format. (can be srec, ihex, binary)
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FORMAT = ihex
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# Object files directory
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# To put object files in current directory, use a dot (.), do NOT make
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# this an empty or blank macro!
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OBJDIR = .
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# List C++ source files here. (C dependencies are automatically generated.)
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CPPSRC =
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# List Assembler source files here.
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# Make them always end in a capital .S. Files ending in a lowercase .s
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# will not be considered source files but generated files (assembler
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# output from the compiler), and will be deleted upon "make clean"!
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# Even though the DOS/Win* filesystem matches both .s and .S the same,
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# it will preserve the spelling of the filenames, and gcc itself does
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# care about how the name is spelled on its command-line.
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ASRC =
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# Optimization level, can be [0, 1, 2, 3, s].
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# 0 = turn off optimization. s = optimize for size.
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# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
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OPT = s
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# Debugging format.
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# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
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# AVR Studio 4.10 requires dwarf-2.
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# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
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DEBUG = dwarf-2
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# List any extra directories to look for include files here.
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# Each directory must be seperated by a space.
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# Use forward slashes for directory separators.
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# For a directory that has spaces, enclose it in quotes.
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EXTRAINCDIRS =
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# Compiler flag to set the C Standard level.
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# c89 = "ANSI" C
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# gnu89 = c89 plus GCC extensions
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# c99 = ISO C99 standard (not yet fully implemented)
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# gnu99 = c99 plus GCC extensions
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CSTANDARD = -std=gnu99
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# Place -D or -U options here for C sources
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CDEFS = -DF_CPU=$(F_CPU)UL
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# Place -D or -U options here for ASM sources
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ADEFS = -DF_CPU=$(F_CPU)
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# Place -D or -U options here for C++ sources
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CPPDEFS = -DF_CPU=$(F_CPU)UL
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#CPPDEFS += -D__STDC_LIMIT_MACROS
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#CPPDEFS += -D__STDC_CONSTANT_MACROS
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#---------------- Compiler Options C ----------------
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# -g*: generate debugging information
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# -O*: optimization level
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# -f...: tuning, see GCC manual and avr-libc documentation
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# -Wall...: warning level
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# -Wa,...: tell GCC to pass this to the assembler.
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# -adhlns...: create assembler listing
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CFLAGS = -g$(DEBUG)
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CFLAGS += $(CDEFS)
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CFLAGS += -O$(OPT)
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CFLAGS += -funsigned-char
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CFLAGS += -funsigned-bitfields
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CFLAGS += -ffunction-sections
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CFLAGS += -fpack-struct
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CFLAGS += -fshort-enums
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CFLAGS += -Wall
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CFLAGS += -Wstrict-prototypes
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#CFLAGS += -mshort-calls
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#CFLAGS += -fno-unit-at-a-time
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#CFLAGS += -Wundef
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#CFLAGS += -Wunreachable-code
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#CFLAGS += -Wsign-compare
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CFLAGS += -Wa,-adhlns=$(<:%.c=$(OBJDIR)/%.lst)
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CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
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CFLAGS += $(CSTANDARD)
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#---------------- Compiler Options C++ ----------------
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# -g*: generate debugging information
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# -O*: optimization level
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# -f...: tuning, see GCC manual and avr-libc documentation
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# -Wall...: warning level
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# -Wa,...: tell GCC to pass this to the assembler.
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# -adhlns...: create assembler listing
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CPPFLAGS = -g$(DEBUG)
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CPPFLAGS += $(CPPDEFS)
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CPPFLAGS += -O$(OPT)
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CPPFLAGS += -funsigned-char
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CPPFLAGS += -funsigned-bitfields
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CPPFLAGS += -fpack-struct
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CPPFLAGS += -fshort-enums
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CPPFLAGS += -fno-exceptions
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CPPFLAGS += -Wall
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CPPFLAGS += -Wundef
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#CPPFLAGS += -mshort-calls
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#CPPFLAGS += -fno-unit-at-a-time
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#CPPFLAGS += -Wstrict-prototypes
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#CPPFLAGS += -Wunreachable-code
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#CPPFLAGS += -Wsign-compare
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CPPFLAGS += -Wa,-adhlns=$(<:%.cpp=$(OBJDIR)/%.lst)
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CPPFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
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#CPPFLAGS += $(CSTANDARD)
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#---------------- Assembler Options ----------------
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# -Wa,...: tell GCC to pass this to the assembler.
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# -adhlns: create listing
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# -gstabs: have the assembler create line number information; note that
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# for use in COFF files, additional information about filenames
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# and function names needs to be present in the assembler source
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# files -- see avr-libc docs [FIXME: not yet described there]
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# -listing-cont-lines: Sets the maximum number of continuation lines of hex
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# dump that will be displayed for a given single line of source input.
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ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:%.S=$(OBJDIR)/%.lst),-gstabs,--listing-cont-lines=100
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#---------------- Library Options ----------------
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# Minimalistic printf version
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PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
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# Floating point printf version (requires MATH_LIB = -lm below)
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PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
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# If this is left blank, then it will use the Standard printf version.
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PRINTF_LIB =
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#PRINTF_LIB = $(PRINTF_LIB_MIN)
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#PRINTF_LIB = $(PRINTF_LIB_FLOAT)
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# Minimalistic scanf version
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SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
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# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
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||||
SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
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|
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# If this is left blank, then it will use the Standard scanf version.
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SCANF_LIB =
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#SCANF_LIB = $(SCANF_LIB_MIN)
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#SCANF_LIB = $(SCANF_LIB_FLOAT)
|
||||
|
||||
|
||||
MATH_LIB = -lm
|
||||
|
||||
|
||||
# List any extra directories to look for libraries here.
|
||||
# Each directory must be seperated by a space.
|
||||
# Use forward slashes for directory separators.
|
||||
# For a directory that has spaces, enclose it in quotes.
|
||||
EXTRALIBDIRS =
|
||||
|
||||
|
||||
|
||||
#---------------- External Memory Options ----------------
|
||||
|
||||
# 64 KB of external RAM, starting after internal RAM (ATmega128!),
|
||||
# used for variables (.data/.bss) and heap (malloc()).
|
||||
#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
|
||||
|
||||
# 64 KB of external RAM, starting after internal RAM (ATmega128!),
|
||||
# only used for heap (malloc()).
|
||||
#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff
|
||||
|
||||
EXTMEMOPTS =
|
||||
|
||||
|
||||
|
||||
#---------------- Linker Options ----------------
|
||||
# -Wl,...: tell GCC to pass this to linker.
|
||||
# -Map: create map file
|
||||
# --cref: add cross reference to map file
|
||||
LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
|
||||
LDFLAGS += -Wl,--relax
|
||||
LDFLAGS += -Wl,--gc-sections
|
||||
LDFLAGS += $(EXTMEMOPTS)
|
||||
LDFLAGS += $(patsubst %,-L%,$(EXTRALIBDIRS))
|
||||
LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
|
||||
#LDFLAGS += -T linker_script.x
|
||||
|
||||
|
||||
|
||||
#---------------- Programming Options (avrdude) ----------------
|
||||
|
||||
# Programming hardware
|
||||
# Type: avrdude -c ?
|
||||
# to get a full listing.
|
||||
#
|
||||
AVRDUDE_PROGRAMMER = stk500v2
|
||||
|
||||
# com1 = serial port. Use lpt1 to connect to parallel port.
|
||||
AVRDUDE_PORT = com1 # programmer connected to serial device
|
||||
|
||||
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
|
||||
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
|
||||
|
||||
|
||||
# Uncomment the following if you want avrdude's erase cycle counter.
|
||||
# Note that this counter needs to be initialized first using -Yn,
|
||||
# see avrdude manual.
|
||||
#AVRDUDE_ERASE_COUNTER = -y
|
||||
|
||||
# Uncomment the following if you do /not/ wish a verification to be
|
||||
# performed after programming the device.
|
||||
#AVRDUDE_NO_VERIFY = -V
|
||||
|
||||
# Increase verbosity level. Please use this when submitting bug
|
||||
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
|
||||
# to submit bug reports.
|
||||
#AVRDUDE_VERBOSE = -v -v
|
||||
|
||||
AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
|
||||
AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
|
||||
|
||||
|
||||
|
||||
#---------------- Debugging Options ----------------
|
||||
|
||||
# For simulavr only - target MCU frequency.
|
||||
DEBUG_MFREQ = $(F_CPU)
|
||||
|
||||
# Set the DEBUG_UI to either gdb or insight.
|
||||
# DEBUG_UI = gdb
|
||||
DEBUG_UI = insight
|
||||
|
||||
# Set the debugging back-end to either avarice, simulavr.
|
||||
DEBUG_BACKEND = avarice
|
||||
#DEBUG_BACKEND = simulavr
|
||||
|
||||
# GDB Init Filename.
|
||||
GDBINIT_FILE = __avr_gdbinit
|
||||
|
||||
# When using avarice settings for the JTAG
|
||||
JTAG_DEV = /dev/com1
|
||||
|
||||
# Debugging port used to communicate between GDB / avarice / simulavr.
|
||||
DEBUG_PORT = 4242
|
||||
|
||||
# Debugging host used to communicate between GDB / avarice / simulavr, normally
|
||||
# just set to localhost unless doing some sort of crazy debugging when
|
||||
# avarice is running on a different computer.
|
||||
DEBUG_HOST = localhost
|
||||
|
||||
|
||||
|
||||
#============================================================================
|
||||
|
||||
|
||||
# Define programs and commands.
|
||||
SHELL = sh
|
||||
CC = avr-gcc
|
||||
OBJCOPY = avr-objcopy
|
||||
OBJDUMP = avr-objdump
|
||||
SIZE = avr-size
|
||||
AR = avr-ar rcs
|
||||
NM = avr-nm
|
||||
AVRDUDE = avrdude
|
||||
REMOVE = rm -f
|
||||
REMOVEDIR = rm -rf
|
||||
COPY = cp
|
||||
WINSHELL = cmd
|
||||
|
||||
|
||||
# Define Messages
|
||||
# English
|
||||
MSG_ERRORS_NONE = Errors: none
|
||||
MSG_BEGIN = -------- begin --------
|
||||
MSG_END = -------- end --------
|
||||
MSG_SIZE_BEFORE = Size before:
|
||||
MSG_SIZE_AFTER = Size after:
|
||||
MSG_COFF = Converting to AVR COFF:
|
||||
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
|
||||
MSG_FLASH = Creating load file for Flash:
|
||||
MSG_EEPROM = Creating load file for EEPROM:
|
||||
MSG_EXTENDED_LISTING = Creating Extended Listing:
|
||||
MSG_SYMBOL_TABLE = Creating Symbol Table:
|
||||
MSG_LINKING = Linking:
|
||||
MSG_COMPILING = Compiling C:
|
||||
MSG_COMPILING_CPP = Compiling C++:
|
||||
MSG_ASSEMBLING = Assembling:
|
||||
MSG_CLEANING = Cleaning project:
|
||||
MSG_CREATING_LIBRARY = Creating library:
|
||||
|
||||
|
||||
|
||||
|
||||
# Define all object files.
|
||||
OBJ = $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o)
|
||||
|
||||
# Define all listing files.
|
||||
LST = $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst)
|
||||
|
||||
|
||||
# Compiler flags to generate dependency files.
|
||||
GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d
|
||||
|
||||
|
||||
# Combine all necessary flags and optional flags.
|
||||
# Add target processor to flags.
|
||||
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
|
||||
ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS)
|
||||
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Default target.
|
||||
all: begin gccversion sizebefore build sizeafter end
|
||||
|
||||
# Change the build target to build a HEX file or a library.
|
||||
build: elf hex eep lss sym
|
||||
#build: lib
|
||||
|
||||
|
||||
elf: $(TARGET).elf
|
||||
hex: $(TARGET).hex
|
||||
eep: $(TARGET).eep
|
||||
lss: $(TARGET).lss
|
||||
sym: $(TARGET).sym
|
||||
LIBNAME=lib$(TARGET).a
|
||||
lib: $(LIBNAME)
|
||||
|
||||
|
||||
|
||||
# Eye candy.
|
||||
# AVR Studio 3.x does not check make's exit code but relies on
|
||||
# the following magic strings to be generated by the compile job.
|
||||
begin:
|
||||
@echo
|
||||
@echo $(MSG_BEGIN)
|
||||
|
||||
end:
|
||||
@echo $(MSG_END)
|
||||
@echo
|
||||
|
||||
|
||||
# Display size of file.
|
||||
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
#ELFSIZE = $(SIZE) --mcu=$(MCU) --format=avr $(TARGET).elf
|
||||
ELFSIZE = $(SIZE) $(TARGET).elf
|
||||
|
||||
sizebefore:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
|
||||
2>/dev/null; echo; fi
|
||||
|
||||
sizeafter:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
|
||||
2>/dev/null; echo; fi
|
||||
|
||||
|
||||
|
||||
# Display compiler version information.
|
||||
gccversion :
|
||||
@$(CC) --version
|
||||
|
||||
|
||||
|
||||
# Program the device.
|
||||
program: $(TARGET).hex $(TARGET).eep
|
||||
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
|
||||
|
||||
|
||||
# Generate avr-gdb config/init file which does the following:
|
||||
# define the reset signal, load the target file, connect to target, and set
|
||||
# a breakpoint at main().
|
||||
gdb-config:
|
||||
@$(REMOVE) $(GDBINIT_FILE)
|
||||
@echo define reset >> $(GDBINIT_FILE)
|
||||
@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
|
||||
@echo end >> $(GDBINIT_FILE)
|
||||
@echo file $(TARGET).elf >> $(GDBINIT_FILE)
|
||||
@echo target remote $(DEBUG_HOST):$(DEBUG_PORT) >> $(GDBINIT_FILE)
|
||||
ifeq ($(DEBUG_BACKEND),simulavr)
|
||||
@echo load >> $(GDBINIT_FILE)
|
||||
endif
|
||||
@echo break main >> $(GDBINIT_FILE)
|
||||
|
||||
debug: gdb-config $(TARGET).elf
|
||||
ifeq ($(DEBUG_BACKEND), avarice)
|
||||
@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
|
||||
@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
|
||||
$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
|
||||
@$(WINSHELL) /c pause
|
||||
|
||||
else
|
||||
@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
|
||||
$(DEBUG_MFREQ) --port $(DEBUG_PORT)
|
||||
endif
|
||||
@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
|
||||
|
||||
|
||||
|
||||
|
||||
# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
|
||||
COFFCONVERT = $(OBJCOPY) --debugging
|
||||
COFFCONVERT += --change-section-address .data-0x800000
|
||||
COFFCONVERT += --change-section-address .bss-0x800000
|
||||
COFFCONVERT += --change-section-address .noinit-0x800000
|
||||
COFFCONVERT += --change-section-address .eeprom-0x810000
|
||||
|
||||
|
||||
|
||||
coff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
extcoff: $(TARGET).elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
|
||||
$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
|
||||
|
||||
|
||||
|
||||
# Create final output files (.hex, .eep) from ELF output file.
|
||||
%.hex: %.elf
|
||||
@echo
|
||||
@echo $(MSG_FLASH) $@
|
||||
$(OBJCOPY) -O $(FORMAT) -R .eeprom -R .fuse -R .lock -R .signature $< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EEPROM) $@
|
||||
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT) $< $@ || exit 0
|
||||
|
||||
# Create extended listing file from ELF output file.
|
||||
%.lss: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_LISTING) $@
|
||||
$(OBJDUMP) -h -S -z $< > $@
|
||||
|
||||
# Create a symbol table from ELF output file.
|
||||
%.sym: %.elf
|
||||
@echo
|
||||
@echo $(MSG_SYMBOL_TABLE) $@
|
||||
$(NM) -n $< > $@
|
||||
|
||||
|
||||
|
||||
# Create library from object files.
|
||||
.SECONDARY : $(TARGET).a
|
||||
.PRECIOUS : $(OBJ)
|
||||
%.a: $(OBJ)
|
||||
@echo
|
||||
@echo $(MSG_CREATING_LIBRARY) $@
|
||||
$(AR) $@ $(OBJ)
|
||||
|
||||
|
||||
# Link: create ELF output file from object files.
|
||||
.SECONDARY : $(TARGET).elf
|
||||
.PRECIOUS : $(OBJ)
|
||||
%.elf: $(OBJ)
|
||||
@echo
|
||||
@echo $(MSG_LINKING) $@
|
||||
$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
|
||||
|
||||
|
||||
# Compile: create object files from C source files.
|
||||
$(OBJDIR)/%.o : %.c
|
||||
@echo
|
||||
@echo $(MSG_COMPILING) $<
|
||||
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create object files from C++ source files.
|
||||
$(OBJDIR)/%.o : %.cpp
|
||||
@echo
|
||||
@echo $(MSG_COMPILING_CPP) $<
|
||||
$(CC) -c $(ALL_CPPFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C source files.
|
||||
%.s : %.c
|
||||
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C++ source files.
|
||||
%.s : %.cpp
|
||||
$(CC) -S $(ALL_CPPFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Assemble: create object files from assembler source files.
|
||||
$(OBJDIR)/%.o : %.S
|
||||
@echo
|
||||
@echo $(MSG_ASSEMBLING) $<
|
||||
$(CC) -c $(ALL_ASFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Create preprocessed source for use in sending a bug report.
|
||||
%.i : %.c
|
||||
$(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Target: clean project.
|
||||
clean: begin clean_list end
|
||||
|
||||
clean_list :
|
||||
@echo
|
||||
@echo $(MSG_CLEANING)
|
||||
$(REMOVE) $(TARGET).hex
|
||||
$(REMOVE) $(TARGET).eep
|
||||
$(REMOVE) $(TARGET).cof
|
||||
$(REMOVE) $(TARGET).elf
|
||||
$(REMOVE) $(TARGET).map
|
||||
$(REMOVE) $(TARGET).sym
|
||||
$(REMOVE) $(TARGET).lss
|
||||
$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.o)
|
||||
$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.lst)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
$(REMOVE) $(SRC:.c=.i)
|
||||
$(REMOVEDIR) .dep
|
||||
|
||||
|
||||
# Create object files directory
|
||||
$(shell mkdir $(OBJDIR) 2>/dev/null)
|
||||
|
||||
|
||||
# Include the dependency files.
|
||||
-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)
|
||||
|
||||
|
||||
# Listing of phony targets.
|
||||
.PHONY : all begin finish end sizebefore sizeafter gccversion \
|
||||
build elf hex eep lss sym coff extcoff \
|
||||
clean clean_list program debug gdb-config
|
|
@ -1,124 +0,0 @@
|
|||
/* Keyboard example for Teensy USB Development Board
|
||||
* http://www.pjrc.com/teensy/usb_keyboard.html
|
||||
* Copyright (c) 2008 PJRC.COM, LLC
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <avr/pgmspace.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <util/delay.h>
|
||||
#include "usb_keyboard.h"
|
||||
|
||||
#define LED_CONFIG (DDRD |= (1<<6))
|
||||
#define LED_ON (PORTD &= ~(1<<6))
|
||||
#define LED_OFF (PORTD |= (1<<6))
|
||||
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
|
||||
|
||||
uint8_t number_keys[10]=
|
||||
{KEY_0,KEY_1,KEY_2,KEY_3,KEY_4,KEY_5,KEY_6,KEY_7,KEY_8,KEY_9};
|
||||
|
||||
uint16_t idle_count=0;
|
||||
|
||||
int main(void)
|
||||
{
|
||||
uint8_t b, d, mask, i, reset_idle;
|
||||
uint8_t b_prev=0xFF, d_prev=0xFF;
|
||||
|
||||
// set for 16 MHz clock
|
||||
CPU_PRESCALE(0);
|
||||
|
||||
// Configure all port B and port D pins as inputs with pullup resistors.
|
||||
// See the "Using I/O Pins" page for details.
|
||||
// http://www.pjrc.com/teensy/pins.html
|
||||
DDRD = 0x00;
|
||||
DDRB = 0x00;
|
||||
PORTB = 0xFF;
|
||||
PORTD = 0xFF;
|
||||
|
||||
// Initialize the USB, and then wait for the host to set configuration.
|
||||
// If the Teensy is powered without a PC connected to the USB port,
|
||||
// this will wait forever.
|
||||
usb_init();
|
||||
while (!usb_configured()) /* wait */ ;
|
||||
|
||||
// Wait an extra second for the PC's operating system to load drivers
|
||||
// and do whatever it does to actually be ready for input
|
||||
_delay_ms(1000);
|
||||
|
||||
// Configure timer 0 to generate a timer overflow interrupt every
|
||||
// 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
|
||||
// This demonstrates how to use interrupts to implement a simple
|
||||
// inactivity timeout.
|
||||
TCCR0A = 0x00;
|
||||
TCCR0B = 0x05;
|
||||
TIMSK0 = (1<<TOIE0);
|
||||
|
||||
while (1) {
|
||||
// read all port B and port D pins
|
||||
b = PINB;
|
||||
d = PIND;
|
||||
// check if any pins are low, but were high previously
|
||||
mask = 1;
|
||||
reset_idle = 0;
|
||||
for (i=0; i<8; i++) {
|
||||
if (((b & mask) == 0) && (b_prev & mask) != 0) {
|
||||
usb_keyboard_press(KEY_B, KEY_SHIFT);
|
||||
usb_keyboard_press(number_keys[i], 0);
|
||||
reset_idle = 1;
|
||||
}
|
||||
if (((d & mask) == 0) && (d_prev & mask) != 0) {
|
||||
usb_keyboard_press(KEY_D, KEY_SHIFT);
|
||||
usb_keyboard_press(number_keys[i], 0);
|
||||
reset_idle = 1;
|
||||
}
|
||||
mask = mask << 1;
|
||||
}
|
||||
// if any keypresses were detected, reset the idle counter
|
||||
if (reset_idle) {
|
||||
// variables shared with interrupt routines must be
|
||||
// accessed carefully so the interrupt routine doesn't
|
||||
// try to use the variable in the middle of our access
|
||||
cli();
|
||||
idle_count = 0;
|
||||
sei();
|
||||
}
|
||||
// now the current pins will be the previous, and
|
||||
// wait a short delay so we're not highly sensitive
|
||||
// to mechanical "bounce".
|
||||
b_prev = b;
|
||||
d_prev = d;
|
||||
_delay_ms(2);
|
||||
}
|
||||
}
|
||||
|
||||
// This interrupt routine is run approx 61 times per second.
|
||||
// A very simple inactivity timeout is implemented, where we
|
||||
// will send a space character.
|
||||
ISR(TIMER0_OVF_vect)
|
||||
{
|
||||
idle_count++;
|
||||
if (idle_count > 61 * 8) {
|
||||
idle_count = 0;
|
||||
usb_keyboard_press(KEY_SPACE, 0);
|
||||
}
|
||||
}
|
||||
|
||||
|
121
src/makefile
121
src/makefile
|
@ -1,6 +1,12 @@
|
|||
# -----------------------------------------------------------------------------
|
||||
# This is mostly a stub at the moment, but I'm keeping it separate so I can
|
||||
# mess with it later without changing the original
|
||||
# makefile for the ergoDOX project
|
||||
#
|
||||
# - .h file dependencies are automatically generated
|
||||
# -
|
||||
#
|
||||
# - This makefile was originally (extensively) modified from the WinAVR
|
||||
# makefile template, mostly by removing stuff. The copy I used was from
|
||||
# [pjrc : usb_keyboard] (http://pjrc.com/teensy/usb_keyboard.zip).
|
||||
# -----------------------------------------------------------------------------
|
||||
# Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
# Released under The MIT License (MIT) (see "license.md")
|
||||
|
@ -9,32 +15,113 @@
|
|||
|
||||
|
||||
TARGET = firmware
|
||||
FORMAT = ihex
|
||||
|
||||
SRC = $(wildcard *.c) \
|
||||
SRC = \
|
||||
$(wildcard *.c) \
|
||||
$(wildcard keyboard/*.c) \
|
||||
$(wildcard keyboard/*/*.c) \
|
||||
$(wildcard lib/*.c) \
|
||||
$(wildcard lib/*/*.c) \
|
||||
'./lib-other/pjrc/usb_keyboard/usb_keyboard.c'
|
||||
lib-other/pjrc/usb_keyboard/usb_keyboard.c
|
||||
|
||||
OBJ = $(SRC:%.c=%.o)
|
||||
|
||||
|
||||
EXTRAINCDIRS = .
|
||||
|
||||
TEENSY_MAKE = $(MAKE) -f 'lib-other/pjrc/usb_keyboard/Makefile' \
|
||||
TARGET='$(TARGET)' \
|
||||
SRC='$(SRC)' \
|
||||
EXTRAINCDIRS='$(EXTRAINCDIRS)'
|
||||
CFLAGS = -mmcu=atmega32u4 # processor type (teensy 2.0); must match real
|
||||
# life
|
||||
CFLAGS += -DF_CPU=16000000 # processor frequency; must match initialization
|
||||
# in source
|
||||
CFLAGS += -I. # search for includes in the current directory
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
CFLAGS += -std=gnu99 # use C99 plus GCC extensions
|
||||
CFLAGS += -Os # optimize for size
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
CFLAGS += -Wall # enable lots of common warnings
|
||||
CFLAGS += -Wstrict-prototypes # "warn if a function is declared or defined
|
||||
# without specifying the argument types"
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
CFLAGS += -fpack-struct # "pack all structure members together without holes"
|
||||
CFLAGS += -fshort-enums # "allocate to an 'enum' type only as many bytes as it
|
||||
# needs for the declared range of possible values"
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
CFLAGS += -ffunction-sections # \ "place each function or data into its own
|
||||
CFLAGS += -fdata-sections # / section in the output file if the
|
||||
# target supports arbitrary sections." for
|
||||
# linker optimizations, and discarding
|
||||
# unused code.
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
CFLAGS += -MMD -MP -MF $@.dep # generate dependency files
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
|
||||
LDFLAGS = -Wl,--relax # for some linker optimizations
|
||||
LDFLAGS += -Wl,--gc-sections # discard unused functions and data
|
||||
|
||||
|
||||
.PHONY: all clean debug
|
||||
CC = avr-gcc
|
||||
OBJCOPY = avr-objcopy
|
||||
SIZE = avr-size
|
||||
|
||||
all:
|
||||
$(TEENSY_MAKE) all
|
||||
# -----------------------------------------------------------------------------
|
||||
# -----------------------------------------------------------------------------
|
||||
|
||||
.PHONY: all clean
|
||||
|
||||
all: $(TARGET).hex $(TARGET).eep
|
||||
@echo
|
||||
@echo '------- done --------------------------------------------------'
|
||||
@echo
|
||||
$(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
@echo
|
||||
$(SIZE) --target=$(FORMAT) $(TARGET).eep
|
||||
@echo
|
||||
@echo '. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .'
|
||||
@echo
|
||||
@echo 'you can load "$(TARGET).hex" and "$(TARGET).eep" onto the'
|
||||
@echo 'Teensy using the Teensy loader'
|
||||
@echo
|
||||
@echo '---------------------------------------------------------------'
|
||||
@echo
|
||||
|
||||
clean:
|
||||
$(TEENSY_MAKE) clean
|
||||
git clean -X
|
||||
@echo
|
||||
@echo --- cleaning ---
|
||||
cd .. ; git clean -dX # remove ignored files and directories
|
||||
|
||||
debug:
|
||||
$(TEENSY_MAKE) debug
|
||||
# -----------------------------------------------------------------------------
|
||||
|
||||
.SECONDARY:
|
||||
|
||||
%.hex: %.elf
|
||||
@echo
|
||||
@echo --- making $@ ---
|
||||
# from the WinAVR makefile template (modified)
|
||||
$(OBJCOPY) -O $(FORMAT) \
|
||||
-R .eeprom -R .fuse -R .lock -R .signature \
|
||||
$< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo --- making $@ ---
|
||||
# from the WinAVR makefile template (modified)
|
||||
-$(OBJCOPY) -O $(FORMAT) \
|
||||
-j .eeprom \
|
||||
--set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 \
|
||||
--no-change-warnings \
|
||||
$< $@ || exit 0
|
||||
|
||||
%.elf: $(OBJ)
|
||||
@echo
|
||||
@echo --- making $@ ---
|
||||
$(CC) $(CFLAGS) $(LDFLAGS) $^ --output $@
|
||||
|
||||
%.o: %.c
|
||||
@echo
|
||||
@echo --- making $@ ---
|
||||
$(CC) -c $(CFLAGS) $< -o $@
|
||||
|
||||
# -----------------------------------------------------------------------------
|
||||
|
||||
-include $(OBJ:%=%.dep)
|
||||
|
||||
|
|
|
@ -1,38 +0,0 @@
|
|||
# -----------------------------------------------------------------------------
|
||||
# This is mostly a stub at the moment, but I'm keeping it separate so I can
|
||||
# mess with it later without changing the original
|
||||
# -----------------------------------------------------------------------------
|
||||
# Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
# Released under The MIT License (MIT) (see "license.md")
|
||||
# Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
# -----------------------------------------------------------------------------
|
||||
|
||||
|
||||
TARGET = test
|
||||
|
||||
EXTRAINCDIRS = ..
|
||||
|
||||
TEENSY_MAKE = $(MAKE) -f '../lib-other/pjrc/blinky/Makefile' \
|
||||
TARGET='$(TARGET)' \
|
||||
EXTRAINCDIRS='$(EXTRAINCDIRS)'
|
||||
|
||||
.PHONY: test_pwm test_twi test_twi_2
|
||||
|
||||
test_pwm:
|
||||
$(TEENSY_MAKE) all \
|
||||
SRC='test_pwm.c'
|
||||
|
||||
test_twi:
|
||||
$(TEENSY_MAKE) all \
|
||||
SRC='test_twi.c'
|
||||
|
||||
test_twi_2:
|
||||
$(TEENSY_MAKE) all \
|
||||
SRC='test_twi_2.c'
|
||||
|
||||
.PHONY: clean
|
||||
|
||||
clean:
|
||||
$(TEENSY_MAKE) clean \
|
||||
SRC='$(shell find -name '*.c')'
|
||||
|
|
@ -1,12 +0,0 @@
|
|||
# src/test
|
||||
Files used for testing (at some point)
|
||||
|
||||
I'm keeping these around for reference; they probably won't be maintained, and
|
||||
are quite likely to become broken at some point in the future.
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
Copyright © 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
Released under The MIT License (MIT) (see "license.md")
|
||||
Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
|
|
@ -1,85 +0,0 @@
|
|||
/* ----------------------------------------------------------------------------
|
||||
* Test the Teensy 2.0 PWM code (see `#include`s)
|
||||
* ----------------------------------------------------------------------------
|
||||
* Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
* Released under The MIT License (MIT) (see "license.md")
|
||||
* Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
* ------------------------------------------------------------------------- */
|
||||
|
||||
|
||||
#include <util/delay.h>
|
||||
#include <avr/io.h>
|
||||
|
||||
|
||||
#define bool _Bool
|
||||
#define true 1
|
||||
#define false 0
|
||||
|
||||
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
|
||||
|
||||
// LED control
|
||||
#define KB_LED1_ON (DDRB |= (1<<5))
|
||||
#define KB_LED1_OFF (DDRB &= ~(1<<5))
|
||||
#define KB_LED1_SET(n) (OCR1A = (uint8_t)(n))
|
||||
#define KB_LED1_SET_PERCENT(n) (OCR1A = (uint8_t)((n) * 0xFF))
|
||||
#define KB_LED2_ON (DDRB |= (1<<6))
|
||||
#define KB_LED2_OFF (DDRB &= ~(1<<6))
|
||||
#define KB_LED2_SET(n) (OCR1B = (uint8_t)(n))
|
||||
#define KB_LED2_SET_PERCENT(n) (OCR1B = (uint8_t)((n) * 0xFF))
|
||||
#define KB_LED3_ON (DDRB |= (1<<7))
|
||||
#define KB_LED3_OFF (DDRB &= ~(1<<7))
|
||||
#define KB_LED3_SET(n) (OCR1C = (uint8_t)(n))
|
||||
#define KB_LED3_SET_PERCENT(n) (OCR1C = (uint8_t)((n) * 0xFF))
|
||||
|
||||
|
||||
int main(void) {
|
||||
CPU_PRESCALE(0); // set for 16MHz
|
||||
|
||||
// pwm init for keyboard LEDs
|
||||
// (see "PWM on ports OC1(A|B|C)" in "teensy-2-0.md")
|
||||
DDRB |= 0b11100000; // set B(7,6,5) as output
|
||||
TCCR1A = 0b10101001; // set and configure fast PWM
|
||||
TCCR1B = 0b00001001; // set and configure fast PWM
|
||||
|
||||
|
||||
for (uint8_t i=0; i<3; i++) {
|
||||
KB_LED1_SET(0x10);
|
||||
KB_LED2_SET(0x20);
|
||||
KB_LED3_SET(0xFF);
|
||||
_delay_ms(500);
|
||||
KB_LED1_SET(0x20);
|
||||
KB_LED2_SET(0xFF);
|
||||
KB_LED3_SET(0x10);
|
||||
_delay_ms(500);
|
||||
KB_LED1_SET(0xFF);
|
||||
KB_LED2_SET(0x10);
|
||||
KB_LED3_SET(0x20);
|
||||
_delay_ms(500);
|
||||
}
|
||||
|
||||
for (uint8_t i=0; i<2; i++) {
|
||||
KB_LED1_OFF;
|
||||
KB_LED2_OFF;
|
||||
KB_LED3_OFF;
|
||||
_delay_ms(500);
|
||||
KB_LED1_ON;
|
||||
KB_LED2_ON;
|
||||
KB_LED3_ON;
|
||||
_delay_ms(500);
|
||||
}
|
||||
|
||||
bool counting_up = true;
|
||||
for (uint8_t i=0;;) {
|
||||
(counting_up) ? i++ : i--;
|
||||
if (i == 0xFF)
|
||||
counting_up = false;
|
||||
else if (i == 0)
|
||||
counting_up = true;
|
||||
|
||||
KB_LED1_SET(i/2);
|
||||
KB_LED2_SET(i/2);
|
||||
KB_LED3_SET(i/2);
|
||||
_delay_ms(10);
|
||||
}
|
||||
}
|
||||
|
|
@ -1,105 +0,0 @@
|
|||
/* ----------------------------------------------------------------------------
|
||||
* Test for ACK on address write (with a Teensy 2.0 and I/O expander)
|
||||
* ----------------------------------------------------------------------------
|
||||
* Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
* Released under The MIT License (MIT) (see "license.md")
|
||||
* Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
* ------------------------------------------------------------------------- */
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <util/twi.h>
|
||||
#include <util/delay.h>
|
||||
|
||||
|
||||
// processor frequency (from <http://www.pjrc.com/teensy/prescaler.html>)
|
||||
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
|
||||
#define CPU_16MHz 0x00
|
||||
#define CPU_8MHz 0x01
|
||||
#define CPU_4MHz 0x02
|
||||
#define CPU_2MHz 0x03
|
||||
#define CPU_1MHz 0x04
|
||||
#define CPU_500kHz 0x05
|
||||
#define CPU_250kHz 0x06
|
||||
#define CPU_125kHz 0x07
|
||||
#define CPU_62kHz 0x08
|
||||
|
||||
|
||||
// ----------------------------------------------------------------------------
|
||||
// helper functions
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
#define blink_led(time1, time2) { \
|
||||
/* Teensy 2.0 onboard LED on PD6
|
||||
on high, off low */ \
|
||||
PORTD |= (1<<6); \
|
||||
_delay_ms(time1); \
|
||||
PORTD &= ~(1<<6); \
|
||||
_delay_ms(time2); \
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------- // TWI
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
void twi_init(void) {
|
||||
TWSR &= ~( (1<<TWPS1)|(1<<TWPS0) );
|
||||
TWBR = ((F_CPU / 100000) - 16) / 2;
|
||||
// TWSR |= (1<<TWPS1)|(1<<TWPS0); //dbg
|
||||
// TWBR = 0xFF; //dbg
|
||||
}
|
||||
|
||||
uint8_t twi_start(void) {
|
||||
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTA);
|
||||
while (!(TWCR & (1<<TWINT)));
|
||||
if ((TWSR & 0xF8) != TW_START)
|
||||
return TWSR & 0xF8; // error
|
||||
}
|
||||
|
||||
void twi_stop(void) {
|
||||
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
|
||||
while (TWCR & (1<<TWSTO));
|
||||
}
|
||||
|
||||
uint8_t twi_send(uint8_t data) {
|
||||
TWDR = data;
|
||||
TWCR = (1<<TWINT)|(1<<TWEN);
|
||||
while (!(TWCR & (1<<TWINT)));
|
||||
if ((TWSR & 0xF8) != TW_MT_SLA_ACK)
|
||||
return TWSR & 0xF8; // error
|
||||
}
|
||||
|
||||
// ----------------------------------------------------------------------------
|
||||
// main
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
void main(void) {
|
||||
CPU_PRESCALE(CPU_16MHz);
|
||||
uint8_t ret;
|
||||
|
||||
twi_init();
|
||||
|
||||
for (uint8_t i=0;; i+=2) { // try all even (write) addresses
|
||||
twi_start();
|
||||
ret = twi_send(i); // i = address
|
||||
twi_stop();
|
||||
|
||||
if (ret == 0x18) // SLA+W sent; ACK received
|
||||
break;
|
||||
|
||||
if (i == 0xFE) // all done
|
||||
break;
|
||||
}
|
||||
|
||||
// blink the return value
|
||||
// --- initial blink (get ready)
|
||||
blink_led(700, 200);
|
||||
// --- 1st hex number
|
||||
for (uint8_t i=0; i<(ret/0x10); i++) {
|
||||
blink_led(200, 100);
|
||||
}
|
||||
_delay_ms(400);
|
||||
// --- 2nd hex number
|
||||
for (uint8_t i=0; i<(ret%0x10); i++) {
|
||||
blink_led(200, 100);
|
||||
}
|
||||
}
|
||||
|
|
@ -1,92 +0,0 @@
|
|||
/* ----------------------------------------------------------------------------
|
||||
* Test TWI write (with a Teensy 2.0 and I/O expander)
|
||||
* ----------------------------------------------------------------------------
|
||||
* Copyright (c) 2012 Ben Blazak <benblazak.dev@gmail.com>
|
||||
* Released under The MIT License (MIT) (see "license.md")
|
||||
* Project located at <https://github.com/benblazak/ergodox-firmware>
|
||||
* ------------------------------------------------------------------------- */
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <util/twi.h>
|
||||
#include <util/delay.h>
|
||||
|
||||
#define TWI_FREQ 400000
|
||||
#include "../lib/teensy-2-0/twi.c"
|
||||
|
||||
|
||||
// processor frequency (from <http://www.pjrc.com/teensy/prescaler.html>)
|
||||
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
|
||||
#define CPU_16MHz 0x00
|
||||
|
||||
|
||||
// ----------------------------------------------------------------------------
|
||||
// helper functions
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
#define blink_led(time1, time2) { \
|
||||
/* Teensy 2.0 onboard LED on PD6
|
||||
on high, off low */ \
|
||||
PORTD |= (1<<6); \
|
||||
_delay_ms(time1); \
|
||||
PORTD &= ~(1<<6); \
|
||||
_delay_ms(time2); \
|
||||
}
|
||||
|
||||
|
||||
// ---------------------------------------------------------------------------- // TWI
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
#define IODIRA 0x00
|
||||
#define IODIRB 0x01
|
||||
#define GPPUA 0x0C
|
||||
#define GPPUB 0x0D
|
||||
#define GPIOA 0x12
|
||||
#define GPIOB 0x13
|
||||
#define OLATA 0x14
|
||||
#define OLATB 0x15
|
||||
|
||||
#define TWI_ADDR_WRITE (0b0100000<<1)|TW_WRITE
|
||||
#define TWI_ADDR_READ (0b0100000<<1)|TW_READ
|
||||
|
||||
|
||||
// ----------------------------------------------------------------------------
|
||||
// main
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
/* notes:
|
||||
* - won't work without the `twi_stop()`s after each block
|
||||
*/
|
||||
int main(void) {
|
||||
CPU_PRESCALE(CPU_16MHz);
|
||||
|
||||
twi_init();
|
||||
|
||||
// set all gpio pins as:
|
||||
|
||||
// output
|
||||
twi_start();
|
||||
twi_send(TWI_ADDR_WRITE);
|
||||
twi_send(IODIRA);
|
||||
twi_send(0);
|
||||
twi_send(0);
|
||||
twi_stop();
|
||||
|
||||
// with pull-up
|
||||
twi_start();
|
||||
twi_send(TWI_ADDR_WRITE);
|
||||
twi_send(GPPUA);
|
||||
twi_send(0xff);
|
||||
twi_send(0xff);
|
||||
twi_stop();
|
||||
|
||||
// logical 1
|
||||
twi_start();
|
||||
twi_send(TWI_ADDR_WRITE);
|
||||
twi_send(OLATA);
|
||||
twi_send(0xff);
|
||||
twi_send(0xff);
|
||||
twi_stop();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
Loading…
Reference in New Issue