Analog to digital conversion and ADXL335.
This commit is contained in:
Mika Tuupola
parent
4bbc74adb4
commit
28daa804b4
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@ -0,0 +1,501 @@
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# ----------------------------------------------------------------------------
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# Makefile based on WinAVR Makefile Template written by Eric B. Weddington,
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# Jörg Wunsch, et al.
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#
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# Adjust F_CPU below to the clock frequency in Mhz of your AVR target
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#
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# Adjust the size of the uart receive and transmit ringbuffer in bytes using
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# defines -DUART_RX_BUFFER_SIZE=128 and -DUART_TX_BUFFER_SIZE=128 in the
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# CDEF section below
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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.
|
||||
#
|
||||
# make clean = Clean out built project files.
|
||||
#
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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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||||
# make program = Download the hex file to the device, using avrdude.
|
||||
# Please customize the avrdude settings below first!
|
||||
#
|
||||
# make debug = Start either simulavr or avarice as specified for debugging,
|
||||
# with avr-gdb or avr-insight as the front end for debugging.
|
||||
#
|
||||
# make filename.s = Just compile filename.c into the assembler code only.
|
||||
#
|
||||
# make filename.i = Create a preprocessed source file for use in submitting
|
||||
# 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 = atmega328p
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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
|
||||
# processor frequency. You can then use this symbol in your source code to
|
||||
# calculate timings. Do NOT tack on a 'UL' at the end, this will be done
|
||||
# automatically to create a 32-bit value in your source code.
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||||
F_CPU = 16000000
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|
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# Output format. (can be srec, ihex, binary)
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FORMAT = ihex
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|
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# Target file name (without extension).
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TARGET = main
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# List C source files here. (C dependencies are automatically generated.)
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SRC = $(TARGET).c uart_async.c analog.c
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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"!
|
||||
# Even though the DOS/Win* filesystem matches both .s and .S the same,
|
||||
# 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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|
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|
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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.
|
||||
# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
|
||||
# AVR Studio 4.10 requires dwarf-2.
|
||||
# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
|
||||
DEBUG = dwarf-2
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||||
|
||||
|
||||
# List any extra directories to look for include files 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.
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||||
EXTRAINCDIRS =
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|
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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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|
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|
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# Place -D or -U options here
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CDEFS = -DF_CPU=$(F_CPU)UL
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# uncomment and adapt these line if you want different UART library buffer size
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#CDEFS += -DUART_RX_BUFFER_SIZE=128
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#CDEFS += -DUART_TX_BUFFER_SIZE=128
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# Place -I options here
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CINCS =
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|
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#---------------- Compiler Options ----------------
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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) $(CINCS)
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CFLAGS += -O$(OPT)
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CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
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CFLAGS += -Wall -Wstrict-prototypes
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CFLAGS += -Wa,-adhlns=$(<:.c=.lst)
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CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
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CFLAGS += $(CSTANDARD)
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|
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|
||||
#---------------- Assembler Options ----------------
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# -Wa,...: tell GCC to pass this to the assembler.
|
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# -ahlms: create listing
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# -gstabs: have the assembler create line number information; note that
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# for use in COFF files, additional information about filenames
|
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# and function names needs to be present in the assembler source
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# files -- see avr-libc docs [FIXME: not yet described there]
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ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
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|
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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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|
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# Minimalistic scanf version
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SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
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|
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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 = $(SCANF_LIB_FLOAT)
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MATH_LIB = -lm
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#---------------- External Memory Options ----------------
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# used for variables (.data/.bss) and heap (malloc()).
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#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
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|
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# only used for heap (malloc()).
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#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
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EXTMEMOPTS =
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|
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#---------------- Linker Options ----------------
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# -Wl,...: tell GCC to pass this to linker.
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# -Map: create map file
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# --cref: add cross reference to map file
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LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
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LDFLAGS += $(EXTMEMOPTS)
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LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
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|
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|
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|
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#---------------- Programming Options (avrdude) ----------------
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|
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# Programming hardware: alf avr910 avrisp bascom bsd
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# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
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#
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# Type: avrdude -c ?
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# to get a full listing.
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#
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AVRDUDE_PROGRAMMER = arduino
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# com1 = serial port. Use lpt1 to connect to parallel port.
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AVRDUDE_PORT = /dev/tty.usb* # programmer connected to serial device
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|
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AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
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#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
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|
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|
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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
|
||||
# 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) -b 57600
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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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|
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#---------------- Debugging Options ----------------
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|
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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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|
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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 = avrdude
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||||
REMOVE = rm -f
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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:
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MSG_ASSEMBLING = Assembling:
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MSG_CLEANING = Cleaning project:
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|
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# Define all object files.
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OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
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|
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# Define all listing files.
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LST = $(SRC:.c=.lst) $(ASRC:.S=.lst)
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# Compiler flags to generate dependency files.
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GENDEPFLAGS = -MD -MP -MF .dep/$(@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) $(GENDEPFLAGS)
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ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
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|
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|
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|
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|
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# Default target.
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all: begin gccversion sizebefore build sizeafter end
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build: elf hex eep lss sym
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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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||||
|
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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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|
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|
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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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|
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sizebefore:
|
||||
@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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|
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|
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|
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# Display compiler version information.
|
||||
gccversion :
|
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@$(CC) --version
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|
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|
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|
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# Program the device.
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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)
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||||
@echo load >> $(GDBINIT_FILE)
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endif
|
||||
@echo break main >> $(GDBINIT_FILE)
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||||
|
||||
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)
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||||
@$(WINSHELL) /c pause
|
||||
|
||||
else
|
||||
@$(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 \
|
||||
--change-section-address .data-0x800000 \
|
||||
--change-section-address .bss-0x800000 \
|
||||
--change-section-address .noinit-0x800000 \
|
||||
--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 $< > $@
|
||||
|
||||
|
||||
|
||||
# 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.
|
||||
%.o : %.c
|
||||
@echo
|
||||
@echo $(MSG_COMPILING) $<
|
||||
$(CC) -c $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Compile: create assembler files from C source files.
|
||||
%.s : %.c
|
||||
$(CC) -S $(ALL_CFLAGS) $< -o $@
|
||||
|
||||
|
||||
# Assemble: create object files from assembler source files.
|
||||
%.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) $(OBJ)
|
||||
$(REMOVE) $(LST)
|
||||
$(REMOVE) $(SRC:.c=.s)
|
||||
$(REMOVE) $(SRC:.c=.d)
|
||||
$(REMOVE) .dep/*
|
||||
|
||||
|
||||
|
||||
# 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 +1,61 @@
|
|||
/*
|
||||
* Analog to digital conversion routines for Atmel.
|
||||
*
|
||||
* Copyright 2011 Mika Tuupola
|
||||
*
|
||||
* Licensed under the MIT license:
|
||||
* http://www.opensource.org/licenses/mit-license.php
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef ADC_REF
|
||||
#define ADC_REF ADC_REF_VCC
|
||||
#endif
|
||||
|
||||
#include <avr/io.h>
|
||||
#include "analog.h"
|
||||
|
||||
uint16_t analog_read(uint8_t pin) {
|
||||
|
||||
/* Enable ADC and set prescaler. */
|
||||
ADCSRA = _BV(ADEN) | ADC_PRESCALER;
|
||||
|
||||
/* Set high speed mode. */
|
||||
ADCSRB |= _BV(ADHSM);
|
||||
|
||||
/* Set adc reference and select mux. */
|
||||
ADMUX = ADC_REF | (pin & 0b00011111);
|
||||
|
||||
/* Start conversion. */
|
||||
ADCSRA |= _BV(ADSC);
|
||||
|
||||
/* Wait until adc has result ready. */
|
||||
loop_until_bit_is_clear(ADCSRA, ADSC);
|
||||
|
||||
/* Word! */
|
||||
return ADCW;
|
||||
}
|
||||
|
||||
uint8_t analog_read_byte(uint8_t pin) {
|
||||
|
||||
/* Enable ADC and set prescaler. */
|
||||
ADCSRA = _BV(ADEN) | ADC_PRESCALER;
|
||||
|
||||
/* Set high speed mode. */
|
||||
ADCSRB |= _BV(ADHSM);
|
||||
|
||||
/* Set adc reference and select mux. */
|
||||
ADMUX = ADC_REF | (pin & 0b00011111);
|
||||
|
||||
/* Left adjust the 10 bit result. */
|
||||
ADMUX |= (1<<ADLAR);
|
||||
|
||||
/* Start conversion. */
|
||||
ADCSRA |= _BV(ADSC);
|
||||
|
||||
/* Wait until adc has result ready. */
|
||||
loop_until_bit_is_clear(ADCSRA, ADSC);
|
||||
|
||||
/* Hight byte. */
|
||||
return ADCH;
|
||||
}
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
/*
|
||||
* analog.h
|
||||
*
|
||||
* Lightweight macro implementation of Arduino style pin numbering
|
||||
* for AVR microprocessors. Because only thing I want to use from
|
||||
* Arduino libraries is the pin numbering scheme.
|
||||
*
|
||||
* This file taken 60% from the excellent ArduinoLite project by
|
||||
* Shikai Chen <csk@live.com>. Part of the code from Teensy examples
|
||||
* by PJRC.COM, LLC. Some minor additions to suite my personal coding
|
||||
* taste.
|
||||
*
|
||||
* http://code.google.com/p/arduino-lite/
|
||||
* http://www.csksoft.net/
|
||||
*
|
||||
* Copyright (c) 2010-2011 Shikai Chen, PJRC.COM LLC, Mika Tuupola
|
||||
*
|
||||
* Licensed under the LGPL 2.1 license:
|
||||
* http://www.opensource.org/licenses/lgpl-2.1.php
|
||||
*/
|
||||
|
||||
#ifndef ANALOG_H
|
||||
#define ANALOG_H
|
||||
#include "pins.h"
|
||||
|
||||
#define PWM_ENABLE(pin) EXPAND_WRAPPER(_PWM_ENABLE ,ARDUINOPIN_TO_TCCRID(pin) , ARDUINOPIN_TO_TIMERID(pin) )
|
||||
#define PWM_DISABLE(pin) EXPAND_WRAPPER(_PWM_DISABLE ,ARDUINOPIN_TO_TCCRID(pin) , ARDUINOPIN_TO_TIMERID(pin) )
|
||||
#define PWM_SET(pin, val) EXPAND_WRAPPER(_PWM_SET, ARDUINOPIN_TO_TIMERID(pin), val )
|
||||
|
||||
#define analog_write( pin, val ) \
|
||||
do{ \
|
||||
PWM_ENABLE(pin); \
|
||||
PWM_SET(pin,val); \
|
||||
} \
|
||||
while(0)
|
||||
|
||||
#define PWM_SET_SAFE(pin, val) \
|
||||
do{ \
|
||||
if (val) {PIN_MODE(pin,OUTPUT);PWM_SET(pin, val);} \
|
||||
else PIN_MODE(pin, INPUT); \
|
||||
}while(0)
|
||||
|
||||
|
||||
uint16_t analog_read(uint8_t pin);
|
||||
uint8_t analog_read_byte(uint8_t pin);
|
||||
|
||||
#define ADC_REF_VCC (1<<REFS0) /* Power supply. Usually 5V */
|
||||
#define ADC_REF_INTERNAL ((1<<REFS1) | (1<<REFS0)) /* Internal 2.56V */
|
||||
#define ADC_REF_EXTERNAL (0)
|
||||
|
||||
/* Taken from Teensy example code: http://www.pjrc.com/teensy/adc.html */
|
||||
|
||||
#if F_CPU == 16000000L
|
||||
#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS1))
|
||||
#elif F_CPU == 8000000L
|
||||
#define ADC_PRESCALER ((1<<ADPS2) | (1<<ADPS0))
|
||||
#elif F_CPU == 4000000L
|
||||
#define ADC_PRESCALER ((1<<ADPS2))
|
||||
#elif F_CPU == 2000000L
|
||||
#define ADC_PRESCALER ((1<<ADPS1) | (1<<ADPS0))
|
||||
#elif F_CPU == 1000000L
|
||||
#define ADC_PRESCALER ((1<<ADPS1))
|
||||
#else
|
||||
#define ADC_PRESCALER ((1<<ADPS0))
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef ADHSM
|
||||
#define ADHSM (7)
|
||||
#endif
|
||||
|
||||
#endif /* ANALOG_H */
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
/*
|
||||
* digital.h
|
||||
*
|
||||
* Lightweight macro implementation of Arduino style pin numbering
|
||||
* for AVR microprocessors. Because only thing I want to use from
|
||||
* Arduino libraries is the pin numbering scheme.
|
||||
*
|
||||
* This file taken 99% from the excellent ArduinoLite project by
|
||||
* Shikai Chen <csk@live.com>. Some minor changes to suite my personal
|
||||
* coding taste.
|
||||
*
|
||||
* http://code.google.com/p/arduino-lite/
|
||||
* http://www.csksoft.net/
|
||||
*
|
||||
* Copyright (c) 2010-2011 Shikai Chen
|
||||
*
|
||||
* Licensed under the LGPL 2.1 license:
|
||||
* http://www.opensource.org/licenses/lgpl-2.1.php
|
||||
*/
|
||||
|
||||
#ifndef DIGITAL_H
|
||||
#define DIGITAL_H
|
||||
#include "pins.h"
|
||||
|
||||
#define digital_read(pin) EXPAND_WRAPPER(_D_READ, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
#define digital_read_raw(pin) EXPAND_WRAPPER(_D_READ_RAW, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
#define digital_write(pin, val) D_WRITE_##val(pin)
|
||||
|
||||
#endif /* DIGITAL_H */
|
||||
|
|
@ -0,0 +1,79 @@
|
|||
/*
|
||||
* Exercise on Atmel analog to digital conversion by reading the values of
|
||||
* ADXL335 accelerometer sensor.
|
||||
*
|
||||
* There are lot of articles on how Atmel analog to digital conversion works.
|
||||
* Most of them don't really explain anything. Code is just copied from
|
||||
* other examples. Only after reading Protostack article I could understand
|
||||
* the inner workings. Another great source of information is source code
|
||||
* of ADC driver from Atmel.
|
||||
*
|
||||
* http://www.protostack.com/blog/2011/02/analogue-to-digital-conversion-on-an-atmega168/
|
||||
* http://www.google.com/search?q=atmel+adc_drv
|
||||
*
|
||||
* General information on ADXL335.
|
||||
*
|
||||
* http://bildr.org/2011/04/sensing-orientation-with-the-adxl335-arduino/
|
||||
* http://www.sparkfun.com/datasheets/Components/SMD/adxl335.pdf
|
||||
*
|
||||
* To compile and upload run: make clean; make; make program;
|
||||
*
|
||||
* Copyright 2011 Mika Tuupola
|
||||
*
|
||||
* Licensed under the MIT license:
|
||||
* http://www.opensource.org/licenses/mit-license.php
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <avr/io.h>
|
||||
#include <stdio.h>
|
||||
#include <util/delay.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include "main.h"
|
||||
#include "uart.h"
|
||||
#include "pins.h"
|
||||
#include "analog.h"
|
||||
|
||||
#define X 0 /* Analog 0 */
|
||||
#define Y 1 /* Analog 1 */
|
||||
#define Z 2 /* Analog 2 */
|
||||
|
||||
static void init(void) {
|
||||
pin_mode(X, INPUT);
|
||||
pin_mode(Y, INPUT);
|
||||
pin_mode(Z, INPUT);
|
||||
}
|
||||
|
||||
int main(void) {
|
||||
|
||||
init();
|
||||
uart_init();
|
||||
stdout = &uart_output;
|
||||
stdin = &uart_input;
|
||||
|
||||
while (1) {
|
||||
|
||||
uint16_t x;
|
||||
uint16_t y;
|
||||
uint16_t z;
|
||||
x = analog_read(X);
|
||||
y = analog_read(Y);
|
||||
z = analog_read(Z);
|
||||
printf("word: %d %d %d\n", x, y, z);
|
||||
|
||||
uint16_t x2;
|
||||
uint16_t y2;
|
||||
uint16_t z2;
|
||||
x2 = analog_read_byte(X);
|
||||
y2 = analog_read_byte(Y);
|
||||
z2 = analog_read_byte(Z);
|
||||
printf("byte: %d %d %d\n", x2, y2, z2);
|
||||
|
||||
_delay_ms(200);
|
||||
|
||||
}
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
static void init(void);
|
||||
int main(void);
|
||||
|
|
@ -0,0 +1,567 @@
|
|||
/*
|
||||
* pins.h
|
||||
*
|
||||
* Lightweight macro implementation of Arduino style pin numbering
|
||||
* for AVR microprocessors. Because only thing I want to use from
|
||||
* Arduino libraries is the pin numbering scheme.
|
||||
*
|
||||
* This file taken 99% from the excellent ArduinoLite project by
|
||||
* Shikai Chen <csk@live.com>. Some minor changes to suite my personal
|
||||
* coding taste.
|
||||
*
|
||||
* http://code.google.com/p/arduino-lite/
|
||||
* http://www.csksoft.net/
|
||||
*
|
||||
* Copyright (c) 2010-2011 Shikai Chen
|
||||
*
|
||||
* Licensed under the LGPL 2.1 license:
|
||||
* http://www.opensource.org/licenses/lgpl-2.1.php
|
||||
*/
|
||||
|
||||
#ifndef PINS_H
|
||||
#define PINS_H
|
||||
|
||||
|
||||
#define HIGH 0x1
|
||||
#define LOW 0x0
|
||||
|
||||
#define INPUT 0x0
|
||||
#define OUTPUT 0x1
|
||||
|
||||
#define ENABLE 0x1
|
||||
#define DISABLE 0x0
|
||||
|
||||
#define ARDUINOPIN_TO_TIMERID(x) TIMER_AT_PIN_##x
|
||||
#define ARDUINOPIN_TO_TCCRID(x) TCCR_AT_PIN_##x
|
||||
|
||||
#define ARDUINOPIN_TO_PORTID(x) PORT_AT_PIN_##x
|
||||
#define ARDUINOPIN_TO_PORTMSK(x) PORTMSK_AT_PIN_##x
|
||||
|
||||
#define PORTID_TO_DIR_REG(x) DIR_REG_AT_##x
|
||||
#define PORTID_TO_OUTPUT_REG(x) OUTPUT_REG_AT_##x
|
||||
#define PORTID_TO_INPUT_REG(x) INPUT_REG_AT_##x
|
||||
|
||||
#if defined(__AVR_ATmega1280__)
|
||||
|
||||
#define PORT_AT_PIN_0 PortE // PE 0 ** 0 ** USART0_RX
|
||||
#define PORT_AT_PIN_1 PortE // PE 1 ** 1 ** USART0_TX
|
||||
#define PORT_AT_PIN_2 PortE // PE 4 ** 2 ** PWM2
|
||||
#define PORT_AT_PIN_3 PortE // PE 5 ** 3 ** PWM3
|
||||
#define PORT_AT_PIN_4 PortG // PG 5 ** 4 ** PWM4
|
||||
#define PORT_AT_PIN_5 PortE // PE 3 ** 5 ** PWM5
|
||||
#define PORT_AT_PIN_6 PortH // PH 3 ** 6 ** PWM6
|
||||
#define PORT_AT_PIN_7 PortH // PH 4 ** 7 ** PWM7
|
||||
#define PORT_AT_PIN_8 PortH // PH 5 ** 8 ** PWM8
|
||||
#define PORT_AT_PIN_9 PortH // PH 6 ** 9 ** PWM9
|
||||
#define PORT_AT_PIN_10 PortB // PB 4 ** 10 ** PWM10
|
||||
#define PORT_AT_PIN_11 PortB // PB 5 ** 11 ** PWM11
|
||||
#define PORT_AT_PIN_12 PortB // PB 6 ** 12 ** PWM12
|
||||
#define PORT_AT_PIN_13 PortB // PB 7 ** 13 ** PWM13
|
||||
#define PORT_AT_PIN_14 PortJ // PJ 1 ** 14 ** USART3_TX
|
||||
#define PORT_AT_PIN_15 PortJ // PJ 0 ** 15 ** USART3_RX
|
||||
#define PORT_AT_PIN_16 PortH // PH 1 ** 16 ** USART2_TX
|
||||
#define PORT_AT_PIN_17 PortH // PH 0 ** 17 ** USART2_RX
|
||||
#define PORT_AT_PIN_18 PortD // PD 3 ** 18 ** USART1_TX
|
||||
#define PORT_AT_PIN_19 PortD // PD 2 ** 19 ** USART1_RX
|
||||
#define PORT_AT_PIN_20 PortD // PD 1 ** 20 ** I2C_SDA
|
||||
#define PORT_AT_PIN_21 PortD // PD 0 ** 21 ** I2C_SCL
|
||||
#define PORT_AT_PIN_22 PortA // PA 0 ** 22 ** D22
|
||||
#define PORT_AT_PIN_23 PortA // PA 1 ** 23 ** D23
|
||||
#define PORT_AT_PIN_24 PortA // PA 2 ** 24 ** D24
|
||||
#define PORT_AT_PIN_25 PortA // PA 3 ** 25 ** D25
|
||||
#define PORT_AT_PIN_26 PortA // PA 4 ** 26 ** D26
|
||||
#define PORT_AT_PIN_27 PortA // PA 5 ** 27 ** D27
|
||||
#define PORT_AT_PIN_28 PortA // PA 6 ** 28 ** D28
|
||||
#define PORT_AT_PIN_29 PortA // PA 7 ** 29 ** D29
|
||||
#define PORT_AT_PIN_30 PortC // PC 7 ** 30 ** D30
|
||||
#define PORT_AT_PIN_31 PortC // PC 6 ** 31 ** D31
|
||||
#define PORT_AT_PIN_32 PortC // PC 5 ** 32 ** D32
|
||||
#define PORT_AT_PIN_33 PortC // PC 4 ** 33 ** D33
|
||||
#define PORT_AT_PIN_34 PortC // PC 3 ** 34 ** D34
|
||||
#define PORT_AT_PIN_35 PortC // PC 2 ** 35 ** D35
|
||||
#define PORT_AT_PIN_36 PortC // PC 1 ** 36 ** D36
|
||||
#define PORT_AT_PIN_37 PortC // PC 0 ** 37 ** D37
|
||||
#define PORT_AT_PIN_38 PortD // PD 7 ** 38 ** D38
|
||||
#define PORT_AT_PIN_39 PortG // PG 2 ** 39 ** D39
|
||||
#define PORT_AT_PIN_40 PortG // PG 1 ** 40 ** D40
|
||||
#define PORT_AT_PIN_41 PortG // PG 0 ** 41 ** D41
|
||||
#define PORT_AT_PIN_42 PortL // PL 7 ** 42 ** D42
|
||||
#define PORT_AT_PIN_43 PortL // PL 6 ** 43 ** D43
|
||||
#define PORT_AT_PIN_44 PortL // PL 5 ** 44 ** D44
|
||||
#define PORT_AT_PIN_45 PortL // PL 4 ** 45 ** D45
|
||||
#define PORT_AT_PIN_46 PortL // PL 3 ** 46 ** D46
|
||||
#define PORT_AT_PIN_47 PortL // PL 2 ** 47 ** D47
|
||||
#define PORT_AT_PIN_48 PortL // PL 1 ** 48 ** D48
|
||||
#define PORT_AT_PIN_49 PortL // PL 0 ** 49 ** D49
|
||||
#define PORT_AT_PIN_50 PortB // PB 3 ** 50 ** SPI_MISO
|
||||
#define PORT_AT_PIN_51 PortB // PB 2 ** 51 ** SPI_MOSI
|
||||
#define PORT_AT_PIN_52 PortB // PB 1 ** 52 ** SPI_SCK
|
||||
#define PORT_AT_PIN_53 PortB // PB 0 ** 53 ** SPI_SS
|
||||
#define PORT_AT_PIN_54 PortF // PF 0 ** 54 ** A0
|
||||
#define PORT_AT_PIN_55 PortF // PF 1 ** 55 ** A1
|
||||
#define PORT_AT_PIN_56 PortF // PF 2 ** 56 ** A2
|
||||
#define PORT_AT_PIN_57 PortF // PF 3 ** 57 ** A3
|
||||
#define PORT_AT_PIN_58 PortF // PF 4 ** 58 ** A4
|
||||
#define PORT_AT_PIN_59 PortF // PF 5 ** 59 ** A5
|
||||
#define PORT_AT_PIN_60 PortF // PF 6 ** 60 ** A6
|
||||
#define PORT_AT_PIN_61 PortF // PF 7 ** 61 ** A7
|
||||
#define PORT_AT_PIN_62 PortK // PK 0 ** 62 ** A8
|
||||
#define PORT_AT_PIN_63 PortK // PK 1 ** 63 ** A9
|
||||
#define PORT_AT_PIN_64 PortK // PK 2 ** 64 ** A10
|
||||
#define PORT_AT_PIN_65 PortK // PK 3 ** 65 ** A11
|
||||
#define PORT_AT_PIN_66 PortK // PK 4 ** 66 ** A12
|
||||
#define PORT_AT_PIN_67 PortK // PK 5 ** 67 ** A13
|
||||
#define PORT_AT_PIN_68 PortK // PK 6 ** 68 ** A14
|
||||
#define PORT_AT_PIN_69 PortK // PK 7 ** 69 ** A15
|
||||
|
||||
#define PORTMSK_AT_PIN_0 _BV( 0 ) // PE 0 ** 0 ** USART0_RX
|
||||
#define PORTMSK_AT_PIN_1 _BV( 1 ) // PE 1 ** 1 ** USART0_TX
|
||||
#define PORTMSK_AT_PIN_2 _BV( 4 ) // PE 4 ** 2 ** PWM2
|
||||
#define PORTMSK_AT_PIN_3 _BV( 5 ) // PE 5 ** 3 ** PWM3
|
||||
#define PORTMSK_AT_PIN_4 _BV( 5 ) // PG 5 ** 4 ** PWM4
|
||||
#define PORTMSK_AT_PIN_5 _BV( 3 ) // PE 3 ** 5 ** PWM5
|
||||
#define PORTMSK_AT_PIN_6 _BV( 3 ) // PH 3 ** 6 ** PWM6
|
||||
#define PORTMSK_AT_PIN_7 _BV( 4 ) // PH 4 ** 7 ** PWM7
|
||||
#define PORTMSK_AT_PIN_8 _BV( 5 ) // PH 5 ** 8 ** PWM8
|
||||
#define PORTMSK_AT_PIN_9 _BV( 6 ) // PH 6 ** 9 ** PWM9
|
||||
#define PORTMSK_AT_PIN_10 _BV( 4 ) // PB 4 ** 10 ** PWM10
|
||||
#define PORTMSK_AT_PIN_11 _BV( 5 ) // PB 5 ** 11 ** PWM11
|
||||
#define PORTMSK_AT_PIN_12 _BV( 6 ) // PB 6 ** 12 ** PWM12
|
||||
#define PORTMSK_AT_PIN_13 _BV( 7 ) // PB 7 ** 13 ** PWM13
|
||||
#define PORTMSK_AT_PIN_14 _BV( 1 ) // PJ 1 ** 14 ** USART3_TX
|
||||
#define PORTMSK_AT_PIN_15 _BV( 0 ) // PJ 0 ** 15 ** USART3_RX
|
||||
#define PORTMSK_AT_PIN_16 _BV( 1 ) // PH 1 ** 16 ** USART2_TX
|
||||
#define PORTMSK_AT_PIN_17 _BV( 0 ) // PH 0 ** 17 ** USART2_RX
|
||||
#define PORTMSK_AT_PIN_18 _BV( 3 ) // PD 3 ** 18 ** USART1_TX
|
||||
#define PORTMSK_AT_PIN_19 _BV( 2 ) // PD 2 ** 19 ** USART1_RX
|
||||
#define PORTMSK_AT_PIN_20 _BV( 1 ) // PD 1 ** 20 ** I2C_SDA
|
||||
#define PORTMSK_AT_PIN_21 _BV( 0 ) // PD 0 ** 21 ** I2C_SCL
|
||||
#define PORTMSK_AT_PIN_22 _BV( 0 ) // PA 0 ** 22 ** D22
|
||||
#define PORTMSK_AT_PIN_23 _BV( 1 ) // PA 1 ** 23 ** D23
|
||||
#define PORTMSK_AT_PIN_24 _BV( 2 ) // PA 2 ** 24 ** D24
|
||||
#define PORTMSK_AT_PIN_25 _BV( 3 ) // PA 3 ** 25 ** D25
|
||||
#define PORTMSK_AT_PIN_26 _BV( 4 ) // PA 4 ** 26 ** D26
|
||||
#define PORTMSK_AT_PIN_27 _BV( 5 ) // PA 5 ** 27 ** D27
|
||||
#define PORTMSK_AT_PIN_28 _BV( 6 ) // PA 6 ** 28 ** D28
|
||||
#define PORTMSK_AT_PIN_29 _BV( 7 ) // PA 7 ** 29 ** D29
|
||||
#define PORTMSK_AT_PIN_30 _BV( 7 ) // PC 7 ** 30 ** D30
|
||||
#define PORTMSK_AT_PIN_31 _BV( 6 ) // PC 6 ** 31 ** D31
|
||||
#define PORTMSK_AT_PIN_32 _BV( 5 ) // PC 5 ** 32 ** D32
|
||||
#define PORTMSK_AT_PIN_33 _BV( 4 ) // PC 4 ** 33 ** D33
|
||||
#define PORTMSK_AT_PIN_34 _BV( 3 ) // PC 3 ** 34 ** D34
|
||||
#define PORTMSK_AT_PIN_35 _BV( 2 ) // PC 2 ** 35 ** D35
|
||||
#define PORTMSK_AT_PIN_36 _BV( 1 ) // PC 1 ** 36 ** D36
|
||||
#define PORTMSK_AT_PIN_37 _BV( 0 ) // PC 0 ** 37 ** D37
|
||||
#define PORTMSK_AT_PIN_38 _BV( 7 ) // PD 7 ** 38 ** D38
|
||||
#define PORTMSK_AT_PIN_39 _BV( 2 ) // PG 2 ** 39 ** D39
|
||||
#define PORTMSK_AT_PIN_40 _BV( 1 ) // PG 1 ** 40 ** D40
|
||||
#define PORTMSK_AT_PIN_41 _BV( 0 ) // PG 0 ** 41 ** D41
|
||||
#define PORTMSK_AT_PIN_42 _BV( 7 ) // PL 7 ** 42 ** D42
|
||||
#define PORTMSK_AT_PIN_43 _BV( 6 ) // PL 6 ** 43 ** D43
|
||||
#define PORTMSK_AT_PIN_44 _BV( 5 ) // PL 5 ** 44 ** D44
|
||||
#define PORTMSK_AT_PIN_45 _BV( 4 ) // PL 4 ** 45 ** D45
|
||||
#define PORTMSK_AT_PIN_46 _BV( 3 ) // PL 3 ** 46 ** D46
|
||||
#define PORTMSK_AT_PIN_47 _BV( 2 ) // PL 2 ** 47 ** D47
|
||||
#define PORTMSK_AT_PIN_48 _BV( 1 ) // PL 1 ** 48 ** D48
|
||||
#define PORTMSK_AT_PIN_49 _BV( 0 ) // PL 0 ** 49 ** D49
|
||||
#define PORTMSK_AT_PIN_50 _BV( 3 ) // PB 3 ** 50 ** SPI_MISO
|
||||
#define PORTMSK_AT_PIN_51 _BV( 2 ) // PB 2 ** 51 ** SPI_MOSI
|
||||
#define PORTMSK_AT_PIN_52 _BV( 1 ) // PB 1 ** 52 ** SPI_SCK
|
||||
#define PORTMSK_AT_PIN_53 _BV( 0 ) // PB 0 ** 53 ** SPI_SS
|
||||
#define PORTMSK_AT_PIN_54 _BV( 0 ) // PF 0 ** 54 ** A0
|
||||
#define PORTMSK_AT_PIN_55 _BV( 1 ) // PF 1 ** 55 ** A1
|
||||
#define PORTMSK_AT_PIN_56 _BV( 2 ) // PF 2 ** 56 ** A2
|
||||
#define PORTMSK_AT_PIN_57 _BV( 3 ) // PF 3 ** 57 ** A3
|
||||
#define PORTMSK_AT_PIN_58 _BV( 4 ) // PF 4 ** 58 ** A4
|
||||
#define PORTMSK_AT_PIN_59 _BV( 5 ) // PF 5 ** 59 ** A5
|
||||
#define PORTMSK_AT_PIN_60 _BV( 6 ) // PF 6 ** 60 ** A6
|
||||
#define PORTMSK_AT_PIN_61 _BV( 7 ) // PF 7 ** 61 ** A7
|
||||
#define PORTMSK_AT_PIN_62 _BV( 0 ) // PK 0 ** 62 ** A8
|
||||
#define PORTMSK_AT_PIN_63 _BV( 1 ) // PK 1 ** 63 ** A9
|
||||
#define PORTMSK_AT_PIN_64 _BV( 2 ) // PK 2 ** 64 ** A10
|
||||
#define PORTMSK_AT_PIN_65 _BV( 3 ) // PK 3 ** 65 ** A11
|
||||
#define PORTMSK_AT_PIN_66 _BV( 4 ) // PK 4 ** 66 ** A12
|
||||
#define PORTMSK_AT_PIN_67 _BV( 5 ) // PK 5 ** 67 ** A13
|
||||
#define PORTMSK_AT_PIN_68 _BV( 6 ) // PK 6 ** 68 ** A14
|
||||
#define PORTMSK_AT_PIN_69 _BV( 7 ) // PK 7 ** 69 ** A15
|
||||
|
||||
////////////Arduino pin to Timer Regs mapping
|
||||
#define TIMER_AT_PIN_2 3B
|
||||
#define TCCR_AT_PIN_2 TCCR3A
|
||||
|
||||
#define TIMER_AT_PIN_3 3C
|
||||
#define TCCR_AT_PIN_3 TCCR3A
|
||||
|
||||
#define TIMER_AT_PIN_4 0B
|
||||
#define TCCR_AT_PIN_4 TCCR0A
|
||||
|
||||
#define TIMER_AT_PIN_5 3A
|
||||
#define TCCR_AT_PIN_5 TCCR3A
|
||||
|
||||
#define TIMER_AT_PIN_6 4A
|
||||
#define TCCR_AT_PIN_6 TCCR4A
|
||||
|
||||
#define TIMER_AT_PIN_7 4B
|
||||
#define TCCR_AT_PIN_7 TCCR4A
|
||||
|
||||
#define TIMER_AT_PIN_8 4C
|
||||
#define TCCR_AT_PIN_8 TCCR4A
|
||||
|
||||
#define TIMER_AT_PIN_9 2B
|
||||
#define TCCR_AT_PIN_9 TCCR2A
|
||||
|
||||
#define TIMER_AT_PIN_10 2A
|
||||
#define TCCR_AT_PIN_10 TCCR2A
|
||||
|
||||
#define TIMER_AT_PIN_11 1A
|
||||
#define TCCR_AT_PIN_11 TCCR1A
|
||||
|
||||
#define TIMER_AT_PIN_12 1B
|
||||
#define TCCR_AT_PIN_12 TCCR1A
|
||||
|
||||
#define TIMER_AT_PIN_13 0A
|
||||
#define TCCR_AT_PIN_13 TCCR0A
|
||||
|
||||
#define TIMER_AT_PIN_44 5C
|
||||
#define TCCR_AT_PIN_44 TCCR5A
|
||||
|
||||
#define TIMER_AT_PIN_45 5B
|
||||
#define TCCR_AT_PIN_45 TCCR5A
|
||||
|
||||
#define TIMER_AT_PIN_46 5A
|
||||
#define TCCR_AT_PIN_46 TCCR5A
|
||||
|
||||
|
||||
////////////PORT to DDRX mapping
|
||||
#define DIR_REG_AT_PortA DDRA
|
||||
#define DIR_REG_AT_PortB DDRB
|
||||
#define DIR_REG_AT_PortC DDRC
|
||||
#define DIR_REG_AT_PortD DDRD
|
||||
#define DIR_REG_AT_PortE DDRE
|
||||
#define DIR_REG_AT_PortF DDRF
|
||||
#define DIR_REG_AT_PortG DDRG
|
||||
#define DIR_REG_AT_PortH DDRH
|
||||
|
||||
#define DIR_REG_AT_PortJ DDRJ
|
||||
#define DIR_REG_AT_PortK DDRK
|
||||
#define DIR_REG_AT_PortL DDRL
|
||||
|
||||
////////////PORT to PORTX mapping
|
||||
#define OUTPUT_REG_AT_PortA PORTA
|
||||
#define OUTPUT_REG_AT_PortB PORTB
|
||||
#define OUTPUT_REG_AT_PortC PORTC
|
||||
#define OUTPUT_REG_AT_PortD PORTD
|
||||
#define OUTPUT_REG_AT_PortE PORTE
|
||||
#define OUTPUT_REG_AT_PortF PORTF
|
||||
#define OUTPUT_REG_AT_PortG PORTG
|
||||
#define OUTPUT_REG_AT_PortH PORTH
|
||||
|
||||
#define OUTPUT_REG_AT_PortJ PORTJ
|
||||
#define OUTPUT_REG_AT_PortK PORTK
|
||||
#define OUTPUT_REG_AT_PortL PORTL
|
||||
|
||||
////////////PORT to PINX(input regs) mapping
|
||||
#define INPUT_REG_AT_PortA PINA
|
||||
#define INPUT_REG_AT_PortB PINB
|
||||
#define INPUT_REG_AT_PortC PINC
|
||||
#define INPUT_REG_AT_PortD PIND
|
||||
#define INPUT_REG_AT_PortE PINE
|
||||
#define INPUT_REG_AT_PortF PINF
|
||||
#define INPUT_REG_AT_PortG PING
|
||||
#define INPUT_REG_AT_PortH PINH
|
||||
|
||||
#define INPUT_REG_AT_PortJ PINJ
|
||||
#define INPUT_REG_AT_PortK PINK
|
||||
#define INPUT_REG_AT_PortL PINL
|
||||
|
||||
#else /* not __AVR_ATmega1280__ */
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
//no PortC on tiny2313
|
||||
//Pin[0-6] -> PortD[0-6]
|
||||
#define PORT_AT_PIN_0 PortD /* 0 */
|
||||
#define PORT_AT_PIN_1 PortD
|
||||
#define PORT_AT_PIN_2 PortD
|
||||
#define PORT_AT_PIN_3 PortD
|
||||
#define PORT_AT_PIN_4 PortD
|
||||
#define PORT_AT_PIN_5 PortD
|
||||
#define PORT_AT_PIN_6 PortD
|
||||
|
||||
//Pin[7-14] -> PortB[0-7]
|
||||
#define PORT_AT_PIN_7 PortB
|
||||
#define PORT_AT_PIN_8 PortB /* 8 */
|
||||
#define PORT_AT_PIN_9 PortB
|
||||
#define PORT_AT_PIN_10 PortB
|
||||
#define PORT_AT_PIN_11 PortB
|
||||
#define PORT_AT_PIN_12 PortB
|
||||
#define PORT_AT_PIN_13 PortB
|
||||
#define PORT_AT_PIN_14 PortB
|
||||
|
||||
#elif defined(__AVR_ATtiny26__)
|
||||
|
||||
//Pin[0-6] -> PortD[0-6]
|
||||
#define PORT_AT_PIN_0 PortB /* 0 */
|
||||
#define PORT_AT_PIN_1 PortB
|
||||
#define PORT_AT_PIN_2 PortB
|
||||
#define PORT_AT_PIN_3 PortB
|
||||
#define PORT_AT_PIN_4 PortB
|
||||
#define PORT_AT_PIN_5 PortB
|
||||
#define PORT_AT_PIN_6 PortB
|
||||
|
||||
|
||||
//D[7-13] and A[0-9] share the same pins on Attiny26
|
||||
#define PORT_AT_PIN_7 PortA /* 0 */
|
||||
#define PORT_AT_PIN_8 PortA
|
||||
#define PORT_AT_PIN_9 PortA
|
||||
#define PORT_AT_PIN_10 PortA
|
||||
#define PORT_AT_PIN_11 PortA
|
||||
#define PORT_AT_PIN_12 PortA
|
||||
#define PORT_AT_PIN_13 PortA
|
||||
|
||||
#else // Atmega8 / Atmegax8
|
||||
#define PORT_AT_PIN_0 PortD /* 0 */
|
||||
#define PORT_AT_PIN_1 PortD
|
||||
#define PORT_AT_PIN_2 PortD
|
||||
#define PORT_AT_PIN_3 PortD
|
||||
#define PORT_AT_PIN_4 PortD
|
||||
#define PORT_AT_PIN_5 PortD
|
||||
#define PORT_AT_PIN_6 PortD
|
||||
#define PORT_AT_PIN_7 PortD
|
||||
#define PORT_AT_PIN_8 PortB /* 8 */
|
||||
#define PORT_AT_PIN_9 PortB
|
||||
#define PORT_AT_PIN_10 PortB
|
||||
#define PORT_AT_PIN_11 PortB
|
||||
#define PORT_AT_PIN_12 PortB
|
||||
#define PORT_AT_PIN_13 PortB
|
||||
#define PORT_AT_PIN_14 PortC /* 14 */
|
||||
#define PORT_AT_PIN_15 PortC
|
||||
#define PORT_AT_PIN_16 PortC
|
||||
#define PORT_AT_PIN_17 PortC
|
||||
#define PORT_AT_PIN_18 PortC
|
||||
#define PORT_AT_PIN_19 PortC
|
||||
|
||||
#define PORT_AT_PIN_20 PortB
|
||||
#define PORT_AT_PIN_21 PortB
|
||||
#endif
|
||||
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
#define PORTMSK_AT_PIN_0 _BV(0)
|
||||
#define PORTMSK_AT_PIN_1 _BV(1)
|
||||
#define PORTMSK_AT_PIN_2 _BV(2)
|
||||
#define PORTMSK_AT_PIN_3 _BV(3)
|
||||
#define PORTMSK_AT_PIN_4 _BV(4)
|
||||
#define PORTMSK_AT_PIN_5 _BV(5)
|
||||
#define PORTMSK_AT_PIN_6 _BV(6)
|
||||
#define PORTMSK_AT_PIN_7 _BV(0)
|
||||
#define PORTMSK_AT_PIN_8 _BV(1)
|
||||
#define PORTMSK_AT_PIN_9 _BV(2)
|
||||
#define PORTMSK_AT_PIN_10 _BV(3)
|
||||
#define PORTMSK_AT_PIN_11 _BV(4)
|
||||
#define PORTMSK_AT_PIN_12 _BV(5)
|
||||
#define PORTMSK_AT_PIN_13 _BV(6)
|
||||
#define PORTMSK_AT_PIN_14 _BV(7)
|
||||
|
||||
#elif defined(__AVR_ATtiny26__)
|
||||
|
||||
#define PORTMSK_AT_PIN_0 _BV(0)
|
||||
#define PORTMSK_AT_PIN_1 _BV(1)
|
||||
#define PORTMSK_AT_PIN_2 _BV(2)
|
||||
#define PORTMSK_AT_PIN_3 _BV(3)
|
||||
#define PORTMSK_AT_PIN_4 _BV(4)
|
||||
#define PORTMSK_AT_PIN_5 _BV(5)
|
||||
#define PORTMSK_AT_PIN_6 _BV(6)
|
||||
#define PORTMSK_AT_PIN_7 _BV(0)
|
||||
#define PORTMSK_AT_PIN_8 _BV(1)
|
||||
#define PORTMSK_AT_PIN_9 _BV(2)
|
||||
#define PORTMSK_AT_PIN_10 _BV(3)
|
||||
#define PORTMSK_AT_PIN_11 _BV(4)
|
||||
#define PORTMSK_AT_PIN_12 _BV(5)
|
||||
#define PORTMSK_AT_PIN_13 _BV(6)
|
||||
|
||||
#else //Atmega8/ Atmegax8
|
||||
#define PORTMSK_AT_PIN_0 _BV(0) /* 0 port D */
|
||||
#define PORTMSK_AT_PIN_1 _BV(1)
|
||||
#define PORTMSK_AT_PIN_2 _BV(2)
|
||||
#define PORTMSK_AT_PIN_3 _BV(3)
|
||||
#define PORTMSK_AT_PIN_4 _BV(4)
|
||||
#define PORTMSK_AT_PIN_5 _BV(5)
|
||||
#define PORTMSK_AT_PIN_6 _BV(6)
|
||||
#define PORTMSK_AT_PIN_7 _BV(7)
|
||||
#define PORTMSK_AT_PIN_8 _BV(0) /* 8 port B */
|
||||
#define PORTMSK_AT_PIN_9 _BV(1)
|
||||
#define PORTMSK_AT_PIN_10 _BV(2)
|
||||
#define PORTMSK_AT_PIN_11 _BV(3)
|
||||
#define PORTMSK_AT_PIN_12 _BV(4)
|
||||
#define PORTMSK_AT_PIN_13 _BV(5)
|
||||
#define PORTMSK_AT_PIN_14 _BV(0) /* 14 port C */
|
||||
#define PORTMSK_AT_PIN_15 _BV(1)
|
||||
#define PORTMSK_AT_PIN_16 _BV(2)
|
||||
#define PORTMSK_AT_PIN_17 _BV(3)
|
||||
#define PORTMSK_AT_PIN_18 _BV(4)
|
||||
#define PORTMSK_AT_PIN_19 _BV(5)
|
||||
|
||||
#define PORTMSK_AT_PIN_20 _BV(6)
|
||||
#define PORTMSK_AT_PIN_21 _BV(7)
|
||||
#endif
|
||||
////////////PORT to DDRX mapping
|
||||
#define DIR_REG_AT_PortA DDRA
|
||||
|
||||
#define DIR_REG_AT_PortB DDRB
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
//no PortC on tiny2313
|
||||
#else
|
||||
#define DIR_REG_AT_PortC DDRC
|
||||
#endif
|
||||
|
||||
#define DIR_REG_AT_PortD DDRD
|
||||
|
||||
////////////PORT to PORTX mapping
|
||||
#define OUTPUT_REG_AT_PortA PORTA
|
||||
#define OUTPUT_REG_AT_PortB PORTB
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
//no PortC on tiny2313
|
||||
#else
|
||||
#define OUTPUT_REG_AT_PortC PORTC
|
||||
#endif
|
||||
|
||||
#define OUTPUT_REG_AT_PortD PORTD
|
||||
|
||||
////////////PORT to PINX(input regs) mapping
|
||||
#define INPUT_REG_AT_PortA PINA
|
||||
|
||||
#define INPUT_REG_AT_PortB PINB
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
//no PortC on tiny2313
|
||||
#else
|
||||
#define INPUT_REG_AT_PortC PINC
|
||||
#endif
|
||||
|
||||
#define INPUT_REG_AT_PortD PIND
|
||||
|
||||
|
||||
#if defined(__AVR_ATtiny2313__)
|
||||
|
||||
#define TIMER_AT_PIN_5 0B
|
||||
#define TCCR_AT_PIN_5 TCCR0A
|
||||
|
||||
#define TIMER_AT_PIN_9 0A
|
||||
#define TCCR_AT_PIN_9 TCCR0A
|
||||
|
||||
#define TIMER_AT_PIN_10 1A
|
||||
#define TCCR_AT_PIN_10 TCCR1A
|
||||
|
||||
#define TIMER_AT_PIN_11 1B
|
||||
#define TCCR_AT_PIN_11 TCCR1A
|
||||
|
||||
#elif defined(__AVR_ATtiny26__)
|
||||
/*
|
||||
#define TIMER_AT_PIN_0 1A
|
||||
#define TCCR_AT_PIN_0 TCCR1A
|
||||
*/
|
||||
#define TIMER_AT_PIN_1 1A
|
||||
#define TCCR_AT_PIN_1 TCCR1A
|
||||
/*
|
||||
#define TIMER_AT_PIN_2 1B
|
||||
#define TCCR_AT_PIN_2 TCCR1A
|
||||
*/
|
||||
#define TIMER_AT_PIN_3 1B
|
||||
#define TCCR_AT_PIN_3 TCCR1A
|
||||
|
||||
#else
|
||||
|
||||
#if !defined(__AVR_ATmega8__) //for Atmega48/88/168/328
|
||||
#define TIMER_AT_PIN_3 2B
|
||||
#define TCCR_AT_PIN_3 TCCR2A
|
||||
|
||||
#define TIMER_AT_PIN_5 0B
|
||||
#define TCCR_AT_PIN_5 TCCR0A
|
||||
|
||||
#define TIMER_AT_PIN_6 0A
|
||||
#define TCCR_AT_PIN_6 TCCR0A
|
||||
#endif
|
||||
|
||||
#define TIMER_AT_PIN_9 1A
|
||||
#define TCCR_AT_PIN_9 TCCR1A
|
||||
|
||||
#define TIMER_AT_PIN_10 1B
|
||||
#define TCCR_AT_PIN_10 TCCR1A
|
||||
|
||||
#if defined(__AVR_ATmega8__)
|
||||
#define TIMER_AT_PIN_11 2
|
||||
#define TCCR_AT_PIN_11 TCCR2
|
||||
#else //for Atmega48/88/168/328
|
||||
#define TIMER_AT_PIN_11 2A
|
||||
#define TCCR_AT_PIN_11 TCCR2A
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#define MERGE_TO_FUNC(prefix, id) prefix##_##id
|
||||
#define EXPAND_WRAPPER( NEXTLEVEL, ...) NEXTLEVEL( __VA_ARGS__ )
|
||||
|
||||
|
||||
|
||||
#define _PWM_SET(id, val) \
|
||||
do{ \
|
||||
OCR##id = val; \
|
||||
} \
|
||||
while(0)
|
||||
|
||||
#define _PWM_ENABLE(TCCR, id) sbi(TCCR, COM##id##1)
|
||||
#define _PWM_DISABLE(TCCR, id) cbi(TCCR, COM##id##1)
|
||||
|
||||
#define _SET_OUTPUT(port_id, msk) PORTID_TO_DIR_REG(port_id) |= (msk)
|
||||
#define _SET_INTPUT(port_id, msk) PORTID_TO_DIR_REG(port_id) &= ~(msk)
|
||||
|
||||
#define _D_WRITE_HIGH(port_id, msk) PORTID_TO_OUTPUT_REG(port_id) |= (msk)
|
||||
#define _D_WRITE_LOW(port_id, msk) PORTID_TO_OUTPUT_REG(port_id) &= ~(msk)
|
||||
|
||||
#define _D_READ_RAW(port_id, msk) ((PORTID_TO_INPUT_REG(port_id)) & (msk))
|
||||
#define _D_READ(port_id, msk) (((PORTID_TO_INPUT_REG(port_id)) & (msk)) != 0 ? 1 : 0)
|
||||
|
||||
#define _D_TOGGLE(port_id, msk) PORTID_TO_OUTPUT_REG(port_id) ^= (msk)
|
||||
/*
|
||||
*
|
||||
* NOTICE: for pins at timer0A/0B,
|
||||
* if the duty cycle to be set equals to zero, using the following code:
|
||||
* DIGITAL_WRITE(pin, LOW);
|
||||
* -- or --
|
||||
* digitalWrite(pin, LOW);
|
||||
* The caller should make sure the current pin has been set to OUTPUT mode first
|
||||
*/
|
||||
|
||||
#define SET_1(pin) SET_OUTPUT(pin)
|
||||
#define SET_0(pin) SET_INPUT(pin)
|
||||
|
||||
#define SET_0x1(pin) SET_OUTPUT(pin)
|
||||
#define SET_0x0(pin) SET_INPUT(pin)
|
||||
|
||||
#define D_WRITE_HIGH(pin) EXPAND_WRAPPER(_D_WRITE_HIGH, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
#define D_WRITE_LOW(pin) EXPAND_WRAPPER(_D_WRITE_LOW, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
|
||||
#define D_WRITE_1(pin) D_WRITE_HIGH(pin)
|
||||
#define D_WRITE_0(pin) D_WRITE_LOW(pin)
|
||||
|
||||
#define D_WRITE_0x1(pin) D_WRITE_HIGH(pin)
|
||||
#define D_WRITE_0x0(pin) D_WRITE_LOW(pin)
|
||||
|
||||
#define D_WRITE_ENABLE(pin) D_WRITE_HIGH(pin)
|
||||
#define D_WRITE_DISABLE(pin) D_WRITE_LOW(pin)
|
||||
|
||||
#define SET_OUTPUT(pin) EXPAND_WRAPPER(_SET_OUTPUT, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
#define SET_INPUT(pin) EXPAND_WRAPPER(_SET_INTPUT, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
|
||||
#define pin_mode(pin, mode) SET_##mode(pin)
|
||||
#define pin_pullup(pin, val) D_WRITE_##val(pin)
|
||||
#define pin_toggle(pin) EXPAND_WRAPPER(_D_TOGGLE, ARDUINOPIN_TO_PORTID(pin), ARDUINOPIN_TO_PORTMSK(pin) )
|
||||
|
||||
|
||||
#endif /* PINS_H */
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
int uart_putchar(char c, FILE *stream);
|
||||
int uart_getchar(FILE *stream);
|
||||
|
||||
void uart_init(void);
|
||||
|
||||
struct rx_ring;
|
||||
struct tx_ring;
|
||||
|
||||
/* http://www.ermicro.com/blog/?p=325 */
|
||||
|
||||
FILE uart_output = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
|
||||
FILE uart_input = FDEV_SETUP_STREAM(NULL, uart_getchar, _FDEV_SETUP_READ);
|
||||
|
|
@ -0,0 +1,102 @@
|
|||
/* Based on Atmel Application Note AVR 306 */
|
||||
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#ifndef BAUD
|
||||
#define BAUD 9600
|
||||
#endif
|
||||
#include <util/setbaud.h>
|
||||
|
||||
#ifndef UART_RX_BUFFER_SIZE
|
||||
#define UART_RX_BUFFER_SIZE 32
|
||||
#endif
|
||||
|
||||
#ifndef UART_TX_BUFFER_SIZE
|
||||
#define UART_TX_BUFFER_SIZE 256
|
||||
#endif
|
||||
|
||||
struct tx_ring {
|
||||
int buffer[UART_TX_BUFFER_SIZE];
|
||||
int start;
|
||||
int end;
|
||||
};
|
||||
|
||||
struct rx_ring {
|
||||
int buffer[UART_RX_BUFFER_SIZE];
|
||||
int start;
|
||||
int end;
|
||||
};
|
||||
|
||||
static struct tx_ring tx_buffer;
|
||||
static struct rx_ring rx_buffer;
|
||||
|
||||
/* http://www.cs.mun.ca/~rod/Winter2007/4723/notes/serial/serial.html */
|
||||
|
||||
void uart_init(void) {
|
||||
|
||||
tx_buffer.start = 0;
|
||||
tx_buffer.end = 0;
|
||||
|
||||
rx_buffer.start = 0;
|
||||
rx_buffer.end = 0;
|
||||
|
||||
UBRR0H = UBRRH_VALUE;
|
||||
UBRR0L = UBRRL_VALUE;
|
||||
|
||||
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); /* 8-bit data */
|
||||
UCSR0B = _BV(RXEN0) | _BV(TXEN0); /* Enable RX and TX */
|
||||
|
||||
sei();
|
||||
}
|
||||
|
||||
int uart_putchar(char c, FILE *stream) {
|
||||
if (c == '\n') {
|
||||
uart_putchar('\r', stream);
|
||||
}
|
||||
|
||||
int write_pointer = (tx_buffer.end + 1) % UART_TX_BUFFER_SIZE;
|
||||
|
||||
if (write_pointer != tx_buffer.start){
|
||||
tx_buffer.buffer[tx_buffer.end] = c;
|
||||
tx_buffer.end = write_pointer;
|
||||
|
||||
/* Data available. Enable the transmit interrupt for serial port 0. */
|
||||
UCSR0B |= _BV(UDRIE0);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int uart_getchar(FILE *stream) {
|
||||
int read_pointer = (rx_buffer.start + 1) % UART_RX_BUFFER_SIZE;
|
||||
|
||||
rx_buffer.start = read_pointer;
|
||||
return rx_buffer.buffer[read_pointer];
|
||||
}
|
||||
|
||||
ISR(USART_RX_vect) {
|
||||
int write_pointer = (rx_buffer.end + 1) % UART_RX_BUFFER_SIZE;
|
||||
|
||||
/* Add next byte to ringbuffer if it has space available. */
|
||||
if (write_pointer != rx_buffer.start){
|
||||
rx_buffer.buffer[rx_buffer.end] = UDR0;
|
||||
rx_buffer.end = write_pointer;
|
||||
}
|
||||
}
|
||||
|
||||
ISR(USART_UDRE_vect){
|
||||
int read_pointer = (tx_buffer.start + 1) % UART_TX_BUFFER_SIZE;
|
||||
|
||||
/* Transmit next byte if data available in ringbuffer. */
|
||||
if (read_pointer != tx_buffer.end) {
|
||||
UDR0 = tx_buffer.buffer[read_pointer];
|
||||
tx_buffer.start = read_pointer;
|
||||
} else {
|
||||
/* Nothing to send. Disable the transmit interrupt for serial port 0. */
|
||||
UCSR0B &= ~_BV(UDRIE0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue