LED matrix and persistence of vision.
This commit is contained in:
Mika Tuupola
parent
3d00faf639
commit
c7372a278d
501
4x4_matrix_part_1/Makefile
Normal file
501
4x4_matrix_part_1/Makefile
Normal file
@ -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
|
||||
# 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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||||
# make extcoff = Convert ELF to AVR Extended COFF.
|
||||
#
|
||||
# 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.
|
||||
#
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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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||||
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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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||||
|
||||
# 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 = main
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# List C source files here. (C dependencies are automatically generated.)
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SRC = $(TARGET).c digital_slow.c
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|
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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.
|
||||
# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
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DEBUG = dwarf-2
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|
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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
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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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|
||||
#---------------- Compiler Options ----------------
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||||
# -g*: generate debugging information
|
||||
# -O*: optimization level
|
||||
# -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 += $(CSTANDARD)
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|
||||
|
||||
#---------------- Assembler Options ----------------
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# -Wa,...: tell GCC to pass this to the assembler.
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||||
# -ahlms: create listing
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# -gstabs: have the assembler create line number information; note that
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||||
# for use in COFF files, additional information about filenames
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# and function names needs to be present in the assembler source
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||||
# files -- see avr-libc docs [FIXME: not yet described there]
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ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
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|
||||
|
||||
#---------------- Library Options ----------------
|
||||
# Minimalistic printf version
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||||
PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
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|
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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
|
||||
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)
|
||||
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 = $(SCANF_LIB_FLOAT)
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|
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MATH_LIB = -lm
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||||
|
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|
||||
|
||||
#---------------- External Memory Options ----------------
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|
||||
# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# used for variables (.data/.bss) and heap (malloc()).
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||||
#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
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|
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# 64 KB of external RAM, starting after internal RAM (ATmega128!),
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# only used for heap (malloc()).
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#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff
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EXTMEMOPTS =
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||||
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||||
|
||||
#---------------- Linker Options ----------------
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||||
# -Wl,...: tell GCC to pass this to linker.
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||||
# -Map: create map file
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# --cref: add cross reference to map file
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LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
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LDFLAGS += $(EXTMEMOPTS)
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LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
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||||
|
||||
|
||||
|
||||
#---------------- Programming Options (avrdude) ----------------
|
||||
|
||||
# Programming hardware: alf avr910 avrisp bascom bsd
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||||
# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
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||||
#
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||||
# Type: avrdude -c ?
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||||
# to get a full listing.
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||||
#
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||||
AVRDUDE_PROGRAMMER = arduino
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||||
|
||||
# com1 = serial port. Use lpt1 to connect to parallel port.
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AVRDUDE_PORT = /dev/tty.usb* # programmer connected to serial device
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|
||||
AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
|
||||
#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
|
||||
|
||||
|
||||
# Uncomment the following if you want avrdude's erase cycle counter.
|
||||
# Note that this counter needs to be initialized first using -Yn,
|
||||
# see avrdude manual.
|
||||
#AVRDUDE_ERASE_COUNTER = -y
|
||||
|
||||
# Uncomment the following if you do /not/ wish a verification to be
|
||||
# performed after programming the device.
|
||||
#AVRDUDE_NO_VERIFY = -V
|
||||
|
||||
# Increase verbosity level. Please use this when submitting bug
|
||||
# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
|
||||
# to submit bug reports.
|
||||
#AVRDUDE_VERBOSE = -v -v
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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)
|
||||
|
||||
|
||||
|
||||
#---------------- Debugging Options ----------------
|
||||
|
||||
# For simulavr only - target MCU frequency.
|
||||
DEBUG_MFREQ = $(F_CPU)
|
||||
|
||||
# Set the DEBUG_UI to either gdb or insight.
|
||||
# DEBUG_UI = gdb
|
||||
DEBUG_UI = insight
|
||||
|
||||
# Set the debugging back-end to either avarice, simulavr.
|
||||
DEBUG_BACKEND = avarice
|
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#DEBUG_BACKEND = simulavr
|
||||
|
||||
# GDB Init Filename.
|
||||
GDBINIT_FILE = __avr_gdbinit
|
||||
|
||||
# When using avarice settings for the JTAG
|
||||
JTAG_DEV = /dev/com1
|
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|
||||
# Debugging port used to communicate between GDB / avarice / simulavr.
|
||||
DEBUG_PORT = 4242
|
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|
||||
# Debugging host used to communicate between GDB / avarice / simulavr, normally
|
||||
# just set to localhost unless doing some sort of crazy debugging when
|
||||
# avarice is running on a different computer.
|
||||
DEBUG_HOST = localhost
|
||||
|
||||
|
||||
|
||||
#============================================================================
|
||||
|
||||
|
||||
# Define programs and commands.
|
||||
SHELL = sh
|
||||
CC = avr-gcc
|
||||
OBJCOPY = avr-objcopy
|
||||
OBJDUMP = avr-objdump
|
||||
SIZE = avr-size
|
||||
NM = avr-nm
|
||||
AVRDUDE = avrdude
|
||||
REMOVE = rm -f
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||||
COPY = cp
|
||||
WINSHELL = cmd
|
||||
|
||||
|
||||
# Define Messages
|
||||
# English
|
||||
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:
|
||||
MSG_SIZE_AFTER = Size after:
|
||||
MSG_COFF = Converting to AVR COFF:
|
||||
MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
|
||||
MSG_FLASH = Creating load file for Flash:
|
||||
MSG_EEPROM = Creating load file for EEPROM:
|
||||
MSG_EXTENDED_LISTING = Creating Extended Listing:
|
||||
MSG_SYMBOL_TABLE = Creating Symbol Table:
|
||||
MSG_LINKING = Linking:
|
||||
MSG_COMPILING = Compiling:
|
||||
MSG_ASSEMBLING = Assembling:
|
||||
MSG_CLEANING = Cleaning project:
|
||||
|
||||
|
||||
|
||||
|
||||
# Define all object files.
|
||||
OBJ = $(SRC:.c=.o) $(ASRC:.S=.o)
|
||||
|
||||
# Define all listing files.
|
||||
LST = $(SRC:.c=.lst) $(ASRC:.S=.lst)
|
||||
|
||||
|
||||
# Compiler flags to generate dependency files.
|
||||
GENDEPFLAGS = -MD -MP -MF .dep/$(@F).d
|
||||
|
||||
|
||||
# Combine all necessary flags and optional flags.
|
||||
# Add target processor to flags.
|
||||
ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
|
||||
ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
# Default target.
|
||||
all: begin gccversion sizebefore build sizeafter end
|
||||
|
||||
build: elf hex eep lss sym
|
||||
|
||||
elf: $(TARGET).elf
|
||||
hex: $(TARGET).hex
|
||||
eep: $(TARGET).eep
|
||||
lss: $(TARGET).lss
|
||||
sym: $(TARGET).sym
|
||||
|
||||
|
||||
|
||||
# Eye candy.
|
||||
# AVR Studio 3.x does not check make's exit code but relies on
|
||||
# the following magic strings to be generated by the compile job.
|
||||
begin:
|
||||
@echo
|
||||
@echo $(MSG_BEGIN)
|
||||
|
||||
end:
|
||||
@echo $(MSG_END)
|
||||
@echo
|
||||
|
||||
|
||||
# Display size of file.
|
||||
HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
|
||||
ELFSIZE = $(SIZE) -A $(TARGET).elf
|
||||
AVRMEM = avr-mem.sh $(TARGET).elf $(MCU)
|
||||
|
||||
sizebefore:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
|
||||
$(AVRMEM) 2>/dev/null; echo; fi
|
||||
|
||||
sizeafter:
|
||||
@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
|
||||
$(AVRMEM) 2>/dev/null; echo; fi
|
||||
|
||||
|
||||
|
||||
# Display compiler version information.
|
||||
gccversion :
|
||||
@$(CC) --version
|
||||
|
||||
|
||||
|
||||
# Program the device.
|
||||
program: $(TARGET).hex $(TARGET).eep
|
||||
$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
|
||||
|
||||
|
||||
# Generate avr-gdb config/init file which does the following:
|
||||
# define the reset signal, load the target file, connect to target, and set
|
||||
# a breakpoint at main().
|
||||
gdb-config:
|
||||
@$(REMOVE) $(GDBINIT_FILE)
|
||||
@echo define reset >> $(GDBINIT_FILE)
|
||||
@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
|
||||
@echo end >> $(GDBINIT_FILE)
|
||||
@echo file $(TARGET).elf >> $(GDBINIT_FILE)
|
||||
@echo target remote $(DEBUG_HOST):$(DEBUG_PORT) >> $(GDBINIT_FILE)
|
||||
ifeq ($(DEBUG_BACKEND),simulavr)
|
||||
@echo load >> $(GDBINIT_FILE)
|
||||
endif
|
||||
@echo break main >> $(GDBINIT_FILE)
|
||||
|
||||
debug: gdb-config $(TARGET).elf
|
||||
ifeq ($(DEBUG_BACKEND), avarice)
|
||||
@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
|
||||
@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
|
||||
$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
|
||||
@$(WINSHELL) /c pause
|
||||
|
||||
else
|
||||
@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
|
||||
$(DEBUG_MFREQ) --port $(DEBUG_PORT)
|
||||
endif
|
||||
@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
|
||||
|
||||
|
||||
|
||||
|
||||
# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
|
||||
COFFCONVERT=$(OBJCOPY) --debugging \
|
||||
--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
|
||||
|
||||
99
4x4_matrix_part_1/digital_slow.c
Normal file
99
4x4_matrix_part_1/digital_slow.c
Normal file
@ -0,0 +1,99 @@
|
||||
#include <stdint.h>
|
||||
#include "digital_slow.h"
|
||||
|
||||
const uint8_t PROGMEM portmask_at_pin[] = {
|
||||
_BV(0), /* 0, port D */
|
||||
_BV(1),
|
||||
_BV(2),
|
||||
_BV(3),
|
||||
_BV(4),
|
||||
_BV(5),
|
||||
_BV(6),
|
||||
_BV(7),
|
||||
_BV(0), /* 8, port B */
|
||||
_BV(1),
|
||||
_BV(2),
|
||||
_BV(3),
|
||||
_BV(4),
|
||||
_BV(5),
|
||||
_BV(0), /* 14, port C */
|
||||
_BV(1),
|
||||
_BV(2),
|
||||
_BV(3),
|
||||
_BV(4),
|
||||
_BV(5),
|
||||
_BV(6),
|
||||
_BV(7)
|
||||
};
|
||||
|
||||
const uint8_t PROGMEM port_at_pin[] = {
|
||||
PD, /* 0 */
|
||||
PD,
|
||||
PD,
|
||||
PD,
|
||||
PD,
|
||||
PD,
|
||||
PD,
|
||||
PD,
|
||||
PB, /* 8 */
|
||||
PB,
|
||||
PB,
|
||||
PB,
|
||||
PB,
|
||||
PB,
|
||||
PC, /* 14 */
|
||||
PC,
|
||||
PC,
|
||||
PC,
|
||||
PC,
|
||||
PC,
|
||||
PB, /* 20 */
|
||||
PB
|
||||
};
|
||||
|
||||
const uint16_t PROGMEM output_reg_at_port[] = {
|
||||
0,
|
||||
0,
|
||||
(uint16_t) &PORTB,
|
||||
(uint16_t) &PORTC,
|
||||
(uint16_t) &PORTD
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
const uint16_t PROGMEM direction_reg_at_port[] = {
|
||||
0,
|
||||
0,
|
||||
(uint16_t) &DDRB,
|
||||
(uint16_t) &DDRC,
|
||||
(uint16_t) &DDRD
|
||||
};
|
||||
|
||||
void pin_mode(uint8_t pin, uint8_t mode) {
|
||||
|
||||
uint8_t port_mask = pgm_read_byte(portmask_at_pin + pin);
|
||||
uint8_t port = pgm_read_byte(port_at_pin + pin);
|
||||
|
||||
volatile uint8_t *direction_register = pgm_read_byte(direction_reg_at_port + port);;
|
||||
|
||||
if (mode == INPUT) {
|
||||
*direction_register &= ~port_mask;
|
||||
} else {
|
||||
*direction_register |= port_mask;
|
||||
}
|
||||
}
|
||||
|
||||
void digital_write(uint8_t pin, uint8_t value) {
|
||||
volatile uint8_t *out;
|
||||
|
||||
uint8_t port_mask = pgm_read_byte(portmask_at_pin + pin);
|
||||
uint8_t port = pgm_read_byte(port_at_pin + pin);
|
||||
uint8_t *output_register = pgm_read_byte(output_reg_at_port + port);
|
||||
|
||||
if (0 == value) {
|
||||
*output_register &= ~port_mask;
|
||||
} else {
|
||||
*output_register |= port_mask;
|
||||
}
|
||||
}
|
||||
23
4x4_matrix_part_1/digital_slow.h
Normal file
23
4x4_matrix_part_1/digital_slow.h
Normal file
@ -0,0 +1,23 @@
|
||||
#ifndef DIGITAL_SLOW_H
|
||||
#define DIGITAL_SLOW_H
|
||||
#include <avr/pgmspace.h>
|
||||
|
||||
#define HIGH 0x1
|
||||
#define LOW 0x0
|
||||
|
||||
#define INPUT 0x0
|
||||
#define OUTPUT 0x1
|
||||
|
||||
#define PB 2
|
||||
#define PC 3
|
||||
#define PD 4
|
||||
|
||||
extern const uint8_t PROGMEM portmask_at_pin[];
|
||||
extern const uint8_t PROGMEM port_at_pin[];
|
||||
extern const uint16_t PROGMEM output_reg_at_port[];
|
||||
extern const uint16_t PROGMEM direction_reg_at_port[];
|
||||
|
||||
void pin_mode(uint8_t pin, uint8_t mode);
|
||||
void digital_write(uint8_t pin, uint8_t value);
|
||||
|
||||
#endif /* DIGITAL_SLOW_H */
|
||||
82
4x4_matrix_part_1/main.c
Normal file
82
4x4_matrix_part_1/main.c
Normal file
@ -0,0 +1,82 @@
|
||||
/*
|
||||
*
|
||||
* 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 <stdint.h>
|
||||
#include <util/delay.h>
|
||||
|
||||
#include "main.h"
|
||||
#include "digital_slow.h"
|
||||
|
||||
uint8_t column_pins[4] = {2, 3, 4, 5};
|
||||
uint8_t row_pins[4] = {11, 10, 9, 8};
|
||||
uint8_t pattern[4][4] = {{1,0,0,1},
|
||||
{0,1,0,0},
|
||||
{0,0,1,0},
|
||||
{1,0,0,1}};
|
||||
|
||||
static void init(void) {
|
||||
|
||||
/* Turn all columns off by setting then low. */
|
||||
for (uint8_t x=0; x<4; x++) {
|
||||
pin_mode(column_pins[x], OUTPUT);
|
||||
digital_write(column_pins[x], LOW);
|
||||
}
|
||||
|
||||
/* Turn all rows off by setting then high. */
|
||||
for (uint8_t y=0; y<4; y++) {
|
||||
pin_mode(row_pins[y], OUTPUT);
|
||||
digital_write(row_pins[y], HIGH);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
void draw(uint8_t buffer[4][4]) {
|
||||
static uint8_t row = 0;
|
||||
|
||||
/* Turn off whole row. */
|
||||
digital_write(row_pins[row], HIGH);
|
||||
|
||||
/* Advance one row and make sure it is 0..4 */
|
||||
row++;
|
||||
row = row % 4;
|
||||
|
||||
/* Connect or disconnect columns as needed. */
|
||||
for (uint8_t column=0; column<4; column++) {
|
||||
digital_write(column_pins[column], buffer[row][column]);
|
||||
}
|
||||
|
||||
/* Turn on whole row. */
|
||||
digital_write(row_pins[row], LOW);
|
||||
}
|
||||
|
||||
int main(void) {
|
||||
|
||||
init();
|
||||
|
||||
/* With 100ms delay eye can see updating row by row. */
|
||||
for (uint8_t i=0; i<40; i++) {
|
||||
draw(pattern);
|
||||
_delay_ms(100);
|
||||
}
|
||||
|
||||
/* With 10ms delay pattern appears but flickers. */
|
||||
for (uint16_t i=0; i<400; i++) {
|
||||
draw(pattern);
|
||||
_delay_ms(10);
|
||||
}
|
||||
|
||||
/* Withoud delay solid pattern appears. */
|
||||
while (1) {
|
||||
draw(pattern);
|
||||
}
|
||||
return 0;
|
||||
|
||||
}
|
||||
3
4x4_matrix_part_1/main.h
Normal file
3
4x4_matrix_part_1/main.h
Normal file
@ -0,0 +1,3 @@
|
||||
static void init(void);
|
||||
void draw(uint8_t buffer[4][4]);
|
||||
int main(void);
|
||||
Loading…
x
Reference in New Issue
Block a user