protothreads example
Eve Entropia
14 years ago
parent
dba28bc8bf
commit
fbc57aae47
@ -0,0 +1,606 @@
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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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# MCU name
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MCU = atmega168
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# Processor frequency.
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# This will define a symbol, F_CPU, in all source code files equal to the
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# processor frequency. You can then use this symbol in your source code to
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# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
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# automatically to create a 32-bit value in your source code.
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# Typical values are:
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# F_CPU = 1000000
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# F_CPU = 1843200
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# F_CPU = 2000000
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# F_CPU = 3686400
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# F_CPU = 4000000
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# F_CPU = 7372800
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# F_CPU = 8000000
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# F_CPU = 11059200
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# F_CPU = 14745600
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# F_CPU = 16000000
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# F_CPU = 18432000
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# F_CPU = 20000000
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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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# Target file name (without extension).
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TARGET = example
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# Object files directory
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OBJDIR = obj
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# List C source files here. (C dependencies are automatically generated.)
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SRC = example.c
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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=$(F_CPU)UL
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# Place -D or -U options here for C++ sources
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CPPDEFS = -DF_CPU=$(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 += -mint8
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#CFLAGS += -mshort-calls
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CFLAGS += -funsigned-char
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CFLAGS += -funsigned-bitfields
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CFLAGS += -fpack-struct
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CFLAGS += -fshort-enums
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#CFLAGS += -fno-unit-at-a-time
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CFLAGS += -Wall
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CFLAGS += -Wstrict-prototypes
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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 += -mint8
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#CPPFLAGS += -mshort-calls
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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 += -fno-unit-at-a-time
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CPPFLAGS += -Wall
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#CPPFLAGS += -Wstrict-prototypes
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CFLAGS += -Wundef
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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 += $(CSTANDARD)
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#---------------- Assembler Options ----------------
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# -Wa,...: tell GCC to pass this to the assembler.
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# -ahlms: create listing
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# -gstabs: have the assembler create line number information; note that
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# for use in COFF files, additional information about filenames
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# and function names needs to be present in the assembler source
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# files -- see avr-libc docs [FIXME: not yet described there]
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ASFLAGS = -Wa,-adhlns=$(<:%.S=$(OBJDIR)/%.lst),-gstabs
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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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# 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 = $(SCANF_LIB_FLOAT)
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MATH_LIB = -lm
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#---------------- External Memory Options ----------------
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# used for variables (.data/.bss) and heap (malloc()).
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#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# only used for heap (malloc()).
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#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
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EXTMEMOPTS =
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#---------------- Linker Options ----------------
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# -Wl,...: tell GCC to pass this to linker.
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# -Map: create map file
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# --cref: add cross reference to map file
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LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
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LDFLAGS += $(EXTMEMOPTS)
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LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
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#LDFLAGS += -T linker_script.x
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#---------------- Programming Options (avrdude) ----------------
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# Programming hardware: alf avr910 avrisp bascom bsd
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# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
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#
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# Type: avrdude -c ?
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# to get a full listing.
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#
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AVRDUDE_PROGRAMMER = stk500v1
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# com1 = serial port. Use lpt1 to connect to parallel port.
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AVRDUDE_PORT = /dev/ttyUSB0# programmer connected to serial device
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AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
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#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
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# Uncomment the following if you want avrdude's erase cycle counter.
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# Note that this counter needs to be initialized first using -Yn,
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# see avrdude manual.
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#AVRDUDE_ERASE_COUNTER = -y
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# Uncomment the following if you do /not/ wish a verification to be
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# performed after programming the device.
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AVRDUDE_NO_VERIFY = -V
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# Increase verbosity level. Please use this when submitting bug
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# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
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# to submit bug reports.
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#AVRDUDE_VERBOSE = -v -v
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AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) -b19200 -D
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AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
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AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
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AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
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#---------------- Debugging Options ----------------
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# For simulavr only - target MCU frequency.
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DEBUG_MFREQ = $(F_CPU)
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# Set the DEBUG_UI to either gdb or insight.
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# DEBUG_UI = gdb
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DEBUG_UI = insight
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# Set the debugging back-end to either avarice, simulavr.
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DEBUG_BACKEND = avarice
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#DEBUG_BACKEND = simulavr
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# GDB Init Filename.
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GDBINIT_FILE = __avr_gdbinit
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# When using avarice settings for the JTAG
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JTAG_DEV = /dev/com1
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# Debugging port used to communicate between GDB / avarice / simulavr.
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DEBUG_PORT = 4242
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# Debugging host used to communicate between GDB / avarice / simulavr, normally
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# just set to localhost unless doing some sort of crazy debugging when
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# avarice is running on a different computer.
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DEBUG_HOST = localhost
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#============================================================================
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# Define programs and commands.
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SHELL = sh
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CC = avr-gcc
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OBJCOPY = avr-objcopy
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OBJDUMP = avr-objdump
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SIZE = avr-size
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NM = avr-nm
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AVRDUDE = /home/entropia/Desktop/arduinisten/arduino-0018-linux-x64/hardware/tools/avrdude -C/home/entropia/Desktop/arduinisten/arduino-0018-linux-x64/hardware/tools/avrdude.conf
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REMOVE = rm -f
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REMOVEDIR = rm -rf
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COPY = cp
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WINSHELL = cmd
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# Define Messages
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# English
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MSG_ERRORS_NONE = Errors: none
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MSG_BEGIN = -------- begin --------
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MSG_END = -------- end --------
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MSG_SIZE_BEFORE = Size before:
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MSG_SIZE_AFTER = Size after:
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MSG_COFF = Converting to AVR COFF:
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MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
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MSG_FLASH = Creating load file for Flash:
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MSG_EEPROM = Creating load file for EEPROM:
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MSG_EXTENDED_LISTING = Creating Extended Listing:
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MSG_SYMBOL_TABLE = Creating Symbol Table:
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MSG_LINKING = Linking:
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MSG_COMPILING = Compiling C:
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MSG_COMPILING_CPP = Compiling C++:
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MSG_ASSEMBLING = Assembling:
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MSG_CLEANING = Cleaning project:
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MSG_CREATING_LIBRARY = Creating library:
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# Define all object files.
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OBJ = $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o)
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# Define all listing files.
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LST = $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst)
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# Compiler flags to generate dependency files.
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GENDEPFLAGS = -MD -MP -MF .dep/$(@F).d
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# Combine all necessary flags and optional flags.
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# Add target processor to flags.
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ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
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ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS)
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ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
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# Default target.
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all: begin gccversion sizebefore build sizeafter end
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# Change the build target to build a HEX file or a library.
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build: elf hex eep lss sym
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#build: lib
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elf: $(TARGET).elf
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hex: $(TARGET).hex
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eep: $(TARGET).eep
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lss: $(TARGET).lss
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sym: $(TARGET).sym
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LIBNAME=lib$(TARGET).a
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lib: $(LIBNAME)
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# Eye candy.
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# AVR Studio 3.x does not check make's exit code but relies on
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# the following magic strings to be generated by the compile job.
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begin:
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@echo
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@echo $(MSG_BEGIN)
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end:
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@echo $(MSG_END)
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@echo
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# Display size of file.
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HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
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ELFSIZE = $(SIZE) -A $(TARGET).elf
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AVRMEM = avr-mem.sh $(TARGET).elf $(MCU)
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sizebefore:
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@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
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$(AVRMEM) 2>/dev/null; echo; fi
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sizeafter:
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@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
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$(AVRMEM) 2>/dev/null; echo; fi
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# Display compiler version information.
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gccversion :
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@$(CC) --version
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# Program the device.
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program: $(TARGET).hex $(TARGET).eep
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perl -MDevice::SerialPort -e "Device::SerialPort->new('$(AVRDUDE_PORT)')->pulse_dtr_on(100);"
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$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
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# Generate avr-gdb config/init file which does the following:
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# define the reset signal, load the target file, connect to target, and set
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# a breakpoint at main().
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gdb-config:
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@$(REMOVE) $(GDBINIT_FILE)
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@echo define reset >> $(GDBINIT_FILE)
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@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
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@echo end >> $(GDBINIT_FILE)
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@echo file $(TARGET).elf >> $(GDBINIT_FILE)
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@echo target remote $(DEBUG_HOST):$(DEBUG_PORT) >> $(GDBINIT_FILE)
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ifeq ($(DEBUG_BACKEND),simulavr)
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@echo load >> $(GDBINIT_FILE)
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endif
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@echo break main >> $(GDBINIT_FILE)
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debug: gdb-config $(TARGET).elf
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ifeq ($(DEBUG_BACKEND), avarice)
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@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
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@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
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$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
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@$(WINSHELL) /c pause
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else
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@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
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$(DEBUG_MFREQ) --port $(DEBUG_PORT)
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endif
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@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
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# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
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COFFCONVERT = $(OBJCOPY) --debugging
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COFFCONVERT += --change-section-address .data-0x800000
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COFFCONVERT += --change-section-address .bss-0x800000
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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 $< $@
|
||||
|
||||
%.eep: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EEPROM) $@
|
||||
-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
|
||||
--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
|
||||
|
||||
# Create extended listing file from ELF output file.
|
||||
%.lss: %.elf
|
||||
@echo
|
||||
@echo $(MSG_EXTENDED_LISTING) $@
|
||||
$(OBJDUMP) -h -S $< > $@
|
||||
|
||||
# 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
|
||||
$(REMOVEDIR) $(OBJDIR)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
$(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
|
||||
|
||||
|
||||
@ -0,0 +1,95 @@
|
||||
#include "avr/io.h"
|
||||
#include "util/delay.h"
|
||||
|
||||
#include "pt.h"
|
||||
|
||||
/* Two flags that the two protothread functions use. */
|
||||
static int protothread1_flag, protothread2_flag;
|
||||
|
||||
static int
|
||||
protothread1(struct pt *pt)
|
||||
{
|
||||
/* A protothread function must begin with PT_BEGIN() which takes a
|
||||
* pointer to a struct pt. */
|
||||
PT_BEGIN(pt);
|
||||
|
||||
/* We loop forever here. */
|
||||
while(1) {
|
||||
/* Wait until the other protothread has set its flag. */
|
||||
PT_WAIT_UNTIL(pt, protothread2_flag != 0);
|
||||
|
||||
PORTB |= _BV(PB3);
|
||||
_delay_ms(200);
|
||||
PORTB &= ~_BV(PB3);
|
||||
_delay_ms(200);
|
||||
|
||||
|
||||
/* We then reset the other protothread's flag, and set our own
|
||||
flag so that the other protothread can run. */
|
||||
protothread2_flag = 0;
|
||||
protothread1_flag = 1;
|
||||
|
||||
/* And we loop. */
|
||||
}
|
||||
|
||||
/* All protothread functions must end with PT_END() which takes a
|
||||
* pointer to a struct pt. */
|
||||
PT_END(pt);
|
||||
}
|
||||
|
||||
static int
|
||||
protothread2(struct pt *pt)
|
||||
{
|
||||
/* A protothread function must begin with PT_BEGIN() which takes a
|
||||
pointer to a struct pt. */
|
||||
PT_BEGIN(pt);
|
||||
|
||||
/* We loop forever here. */
|
||||
while(1) {
|
||||
/* Let the other protothread run. */
|
||||
protothread2_flag = 1;
|
||||
|
||||
/* Wait until the other protothread has set its flag. */
|
||||
PT_WAIT_UNTIL(pt, protothread1_flag != 0);
|
||||
|
||||
PORTB |= _BV(PB2);
|
||||
_delay_ms(100);
|
||||
PORTB &= ~_BV(PB2);
|
||||
_delay_ms(100);
|
||||
|
||||
|
||||
/* We then reset the other protothread's flag, and set our own
|
||||
flag so that the other protothread can run. */
|
||||
protothread1_flag = 0;
|
||||
protothread2_flag = 1;
|
||||
|
||||
/* And we loop. */
|
||||
}
|
||||
|
||||
/* All protothread functions must end with PT_END() which takes a
|
||||
* pointer to a struct pt. */
|
||||
PT_END(pt);
|
||||
}
|
||||
|
||||
static struct pt pt1, pt2;
|
||||
|
||||
int main() {
|
||||
// pin 11 = PB3
|
||||
DDRB |= _BV(PB3);
|
||||
// pin 10 = PB2
|
||||
DDRB |= _BV(PB2);
|
||||
|
||||
/* Initialize the protothread state variables with PT_INIT(). */
|
||||
PT_INIT(&pt1);
|
||||
PT_INIT(&pt2);
|
||||
|
||||
/*
|
||||
* Then we schedule the two protothreads by repeatedly calling their
|
||||
* protothread functions and passing a pointer to the protothread
|
||||
* state variables as arguments.
|
||||
*/
|
||||
while(1) {
|
||||
protothread1(&pt1);
|
||||
protothread2(&pt2);
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,76 @@
|
||||
/*
|
||||
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the Institute nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
* $Id: lc-switch.h,v 1.4 2006/06/03 11:29:43 adam Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
* \addtogroup lc
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Implementation of local continuations based on switch() statment
|
||||
* \author Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
* This implementation of local continuations uses the C switch()
|
||||
* statement to resume execution of a function somewhere inside the
|
||||
* function's body. The implementation is based on the fact that
|
||||
* switch() statements are able to jump directly into the bodies of
|
||||
* control structures such as if() or while() statmenets.
|
||||
*
|
||||
* This implementation borrows heavily from Simon Tatham's coroutines
|
||||
* implementation in C:
|
||||
* http://www.chiark.greenend.org.uk/~sgtatham/coroutines.html
|
||||
*/
|
||||
|
||||
#ifndef __LC_SWITCH_H__
|
||||
#define __LC_SWITCH_H__
|
||||
|
||||
/* WARNING! lc implementation using switch() does not work if an
|
||||
LC_SET() is done within another switch() statement! */
|
||||
|
||||
/** \hideinitializer */
|
||||
typedef unsigned short lc_t;
|
||||
|
||||
#define LC_INIT(s) s = 0;
|
||||
|
||||
#define LC_RESUME(s) switch(s) { case 0:
|
||||
|
||||
#define LC_SET(s) s = __LINE__; case __LINE__:
|
||||
|
||||
#define LC_END(s) }
|
||||
|
||||
#endif /* __LC_SWITCH_H__ */
|
||||
|
||||
/** @} */
|
||||
@ -0,0 +1,132 @@
|
||||
/*
|
||||
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the Institute nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the protothreads library.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
* $Id: lc.h,v 1.2 2005/02/24 10:36:59 adam Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
* \addtogroup pt
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \defgroup lc Local continuations
|
||||
* @{
|
||||
*
|
||||
* Local continuations form the basis for implementing protothreads. A
|
||||
* local continuation can be <i>set</i> in a specific function to
|
||||
* capture the state of the function. After a local continuation has
|
||||
* been set can be <i>resumed</i> in order to restore the state of the
|
||||
* function at the point where the local continuation was set.
|
||||
*
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file lc.h
|
||||
* Local continuations
|
||||
* \author
|
||||
* Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
*/
|
||||
|
||||
#ifdef DOXYGEN
|
||||
/**
|
||||
* Initialize a local continuation.
|
||||
*
|
||||
* This operation initializes the local continuation, thereby
|
||||
* unsetting any previously set continuation state.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define LC_INIT(lc)
|
||||
|
||||
/**
|
||||
* Set a local continuation.
|
||||
*
|
||||
* The set operation saves the state of the function at the point
|
||||
* where the operation is executed. As far as the set operation is
|
||||
* concerned, the state of the function does <b>not</b> include the
|
||||
* call-stack or local (automatic) variables, but only the program
|
||||
* counter and such CPU registers that needs to be saved.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define LC_SET(lc)
|
||||
|
||||
/**
|
||||
* Resume a local continuation.
|
||||
*
|
||||
* The resume operation resumes a previously set local continuation, thus
|
||||
* restoring the state in which the function was when the local
|
||||
* continuation was set. If the local continuation has not been
|
||||
* previously set, the resume operation does nothing.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define LC_RESUME(lc)
|
||||
|
||||
/**
|
||||
* Mark the end of local continuation usage.
|
||||
*
|
||||
* The end operation signifies that local continuations should not be
|
||||
* used any more in the function. This operation is not needed for
|
||||
* most implementations of local continuation, but is required by a
|
||||
* few implementations.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define LC_END(lc)
|
||||
|
||||
/**
|
||||
* \var typedef lc_t;
|
||||
*
|
||||
* The local continuation type.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#endif /* DOXYGEN */
|
||||
|
||||
#ifndef __LC_H__
|
||||
#define __LC_H__
|
||||
|
||||
|
||||
#ifdef LC_INCLUDE
|
||||
#include LC_INCLUDE
|
||||
#else
|
||||
#include "lc-switch.h"
|
||||
#endif /* LC_INCLUDE */
|
||||
|
||||
#endif /* __LC_H__ */
|
||||
|
||||
/** @} */
|
||||
/** @} */
|
||||
@ -0,0 +1,323 @@
|
||||
/*
|
||||
* Copyright (c) 2004-2005, Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. Neither the name of the Institute nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
* $Id: pt.h,v 1.7 2006/10/02 07:52:56 adam Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
* \addtogroup pt
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* \file
|
||||
* Protothreads implementation.
|
||||
* \author
|
||||
* Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __PT_H__
|
||||
#define __PT_H__
|
||||
|
||||
#include "lc.h"
|
||||
|
||||
struct pt {
|
||||
lc_t lc;
|
||||
};
|
||||
|
||||
#define PT_WAITING 0
|
||||
#define PT_YIELDED 1
|
||||
#define PT_EXITED 2
|
||||
#define PT_ENDED 3
|
||||
|
||||
/**
|
||||
* \name Initialization
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Initialize a protothread.
|
||||
*
|
||||
* Initializes a protothread. Initialization must be done prior to
|
||||
* starting to execute the protothread.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \sa PT_SPAWN()
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_INIT(pt) LC_INIT((pt)->lc)
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Declaration and definition
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Declaration of a protothread.
|
||||
*
|
||||
* This macro is used to declare a protothread. All protothreads must
|
||||
* be declared with this macro.
|
||||
*
|
||||
* \param name_args The name and arguments of the C function
|
||||
* implementing the protothread.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_THREAD(name_args) char name_args
|
||||
|
||||
/**
|
||||
* Declare the start of a protothread inside the C function
|
||||
* implementing the protothread.
|
||||
*
|
||||
* This macro is used to declare the starting point of a
|
||||
* protothread. It should be placed at the start of the function in
|
||||
* which the protothread runs. All C statements above the PT_BEGIN()
|
||||
* invokation will be executed each time the protothread is scheduled.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_BEGIN(pt) { char PT_YIELD_FLAG = 1; LC_RESUME((pt)->lc)
|
||||
|
||||
/**
|
||||
* Declare the end of a protothread.
|
||||
*
|
||||
* This macro is used for declaring that a protothread ends. It must
|
||||
* always be used together with a matching PT_BEGIN() macro.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_END(pt) LC_END((pt)->lc); PT_YIELD_FLAG = 0; \
|
||||
PT_INIT(pt); return PT_ENDED; }
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Blocked wait
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Block and wait until condition is true.
|
||||
*
|
||||
* This macro blocks the protothread until the specified condition is
|
||||
* true.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
* \param condition The condition.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_WAIT_UNTIL(pt, condition) \
|
||||
do { \
|
||||
LC_SET((pt)->lc); \
|
||||
if(!(condition)) { \
|
||||
return PT_WAITING; \
|
||||
} \
|
||||
} while(0)
|
||||
|
||||
/**
|
||||
* Block and wait while condition is true.
|
||||
*
|
||||
* This function blocks and waits while condition is true. See
|
||||
* PT_WAIT_UNTIL().
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
* \param cond The condition.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_WAIT_WHILE(pt, cond) PT_WAIT_UNTIL((pt), !(cond))
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Hierarchical protothreads
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Block and wait until a child protothread completes.
|
||||
*
|
||||
* This macro schedules a child protothread. The current protothread
|
||||
* will block until the child protothread completes.
|
||||
*
|
||||
* \note The child protothread must be manually initialized with the
|
||||
* PT_INIT() function before this function is used.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
* \param thread The child protothread with arguments
|
||||
*
|
||||
* \sa PT_SPAWN()
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_WAIT_THREAD(pt, thread) PT_WAIT_WHILE((pt), PT_SCHEDULE(thread))
|
||||
|
||||
/**
|
||||
* Spawn a child protothread and wait until it exits.
|
||||
*
|
||||
* This macro spawns a child protothread and waits until it exits. The
|
||||
* macro can only be used within a protothread.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
* \param child A pointer to the child protothread's control structure.
|
||||
* \param thread The child protothread with arguments
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_SPAWN(pt, child, thread) \
|
||||
do { \
|
||||
PT_INIT((child)); \
|
||||
PT_WAIT_THREAD((pt), (thread)); \
|
||||
} while(0)
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Exiting and restarting
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Restart the protothread.
|
||||
*
|
||||
* This macro will block and cause the running protothread to restart
|
||||
* its execution at the place of the PT_BEGIN() call.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_RESTART(pt) \
|
||||
do { \
|
||||
PT_INIT(pt); \
|
||||
return PT_WAITING; \
|
||||
} while(0)
|
||||
|
||||
/**
|
||||
* Exit the protothread.
|
||||
*
|
||||
* This macro causes the protothread to exit. If the protothread was
|
||||
* spawned by another protothread, the parent protothread will become
|
||||
* unblocked and can continue to run.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_EXIT(pt) \
|
||||
do { \
|
||||
PT_INIT(pt); \
|
||||
return PT_EXITED; \
|
||||
} while(0)
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Calling a protothread
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Schedule a protothread.
|
||||
*
|
||||
* This function shedules a protothread. The return value of the
|
||||
* function is non-zero if the protothread is running or zero if the
|
||||
* protothread has exited.
|
||||
*
|
||||
* \param f The call to the C function implementing the protothread to
|
||||
* be scheduled
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_SCHEDULE(f) ((f) < PT_EXITED)
|
||||
|
||||
/** @} */
|
||||
|
||||
/**
|
||||
* \name Yielding from a protothread
|
||||
* @{
|
||||
*/
|
||||
|
||||
/**
|
||||
* Yield from the current protothread.
|
||||
*
|
||||
* This function will yield the protothread, thereby allowing other
|
||||
* processing to take place in the system.
|
||||
*
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_YIELD(pt) \
|
||||
do { \
|
||||
PT_YIELD_FLAG = 0; \
|
||||
LC_SET((pt)->lc); \
|
||||
if(PT_YIELD_FLAG == 0) { \
|
||||
return PT_YIELDED; \
|
||||
} \
|
||||
} while(0)
|
||||
|
||||
/**
|
||||
* \brief Yield from the protothread until a condition occurs.
|
||||
* \param pt A pointer to the protothread control structure.
|
||||
* \param cond The condition.
|
||||
*
|
||||
* This function will yield the protothread, until the
|
||||
* specified condition evaluates to true.
|
||||
*
|
||||
*
|
||||
* \hideinitializer
|
||||
*/
|
||||
#define PT_YIELD_UNTIL(pt, cond) \
|
||||
do { \
|
||||
PT_YIELD_FLAG = 0; \
|
||||
LC_SET((pt)->lc); \
|
||||
if((PT_YIELD_FLAG == 0) || !(cond)) { \
|
||||
return PT_YIELDED; \
|
||||
} \
|
||||
} while(0)
|
||||
|
||||
/** @} */
|
||||
|
||||
#endif /* __PT_H__ */
|
||||
|
||||
/** @} */
|
||||
Reference in New Issue