diff --git a/blog/driving_595/bitbang/Makefile b/blog/driving_595/bitbang/Makefile new file mode 100644 index 0000000..1c3498f --- /dev/null +++ b/blog/driving_595/bitbang/Makefile @@ -0,0 +1,503 @@ +# ---------------------------------------------------------------------------- +# Makefile based on WinAVR Makefile Template written by Eric B. Weddington, +# Jörg Wunsch, et al. +# +# Adjust F_CPU below to the clock frequency in Mhz of your AVR target +# +# 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 +# CDEF section below +# +#---------------------------------------------------------------------------- +# On command line: +# +# make all = Make software. +# +# make clean = Clean out built project files. +# +# make coff = Convert ELF to AVR COFF. +# +# 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. +# +# make filename.i = Create a preprocessed source file for use in submitting +# bug reports to the GCC project. +# +# To rebuild project do "make clean" then "make all". +#---------------------------------------------------------------------------- + + +# MCU name +#MCU = atmega328p +MCU = atmega32u4 + +# Processor frequency. +# 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. +F_CPU = 16000000 + +# Output format. (can be srec, ihex, binary) +FORMAT = ihex + +# Target file name (without extension). +TARGET = main + +# List C source files here. (C dependencies are automatically generated.) +SRC = $(TARGET).c + +# List Assembler source files here. +# Make them always end in a capital .S. Files ending in a lowercase .s +# will not be considered source files but generated files (assembler +# output from the compiler), and will be deleted upon "make clean"! +# Even though the DOS/Win* filesystem matches both .s and .S the same, +# it will preserve the spelling of the filenames, and gcc itself does +# care about how the name is spelled on its command-line. +ASRC = + + +# Optimization level, can be [0, 1, 2, 3, s]. +# 0 = turn off optimization. s = optimize for size. +# (Note: 3 is not always the best optimization level. See avr-libc FAQ.) +OPT = s + + +# Debugging format. +# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs. +# AVR Studio 4.10 requires dwarf-2. +# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run. +DEBUG = dwarf-2 + + +# List any extra directories to look for include files here. +# Each directory must be seperated by a space. +# Use forward slashes for directory separators. +# For a directory that has spaces, enclose it in quotes. +EXTRAINCDIRS = + + +# Compiler flag to set the C Standard level. +# c89 = "ANSI" C +# gnu89 = c89 plus GCC extensions +# c99 = ISO C99 standard (not yet fully implemented) +# gnu99 = c99 plus GCC extensions +CSTANDARD = -std=gnu99 + + +# Place -D or -U options here +CDEFS = -DF_CPU=$(F_CPU)UL + +# uncomment and adapt these line if you want different UART library buffer size +#CDEFS += -DUART_RX_BUFFER_SIZE=128 +#CDEFS += -DUART_TX_BUFFER_SIZE=128 + + +# Place -I options here +CINCS = + + + +#---------------- Compiler Options ---------------- +# -g*: generate debugging information +# -O*: optimization level +# -f...: tuning, see GCC manual and avr-libc documentation +# -Wall...: warning level +# -Wa,...: tell GCC to pass this to the assembler. +# -adhlns...: create assembler listing +CFLAGS = -g$(DEBUG) +CFLAGS += $(CDEFS) $(CINCS) +CFLAGS += -O$(OPT) +CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums +CFLAGS += -Wall -Wstrict-prototypes +CFLAGS += -Wa,-adhlns=$(<:.c=.lst) +CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS)) +CFLAGS += $(CSTANDARD) + + +#---------------- Assembler Options ---------------- +# -Wa,...: tell GCC to pass this to the assembler. +# -ahlms: create listing +# -gstabs: have the assembler create line number information; note that +# for use in COFF files, additional information about filenames +# and function names needs to be present in the assembler source +# files -- see avr-libc docs [FIXME: not yet described there] +ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs + + +#---------------- Library Options ---------------- +# Minimalistic printf version +PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min + +# Floating point printf version (requires MATH_LIB = -lm below) +PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt + +# If this is left blank, then it will use the Standard printf version. +PRINTF_LIB = +#PRINTF_LIB = $(PRINTF_LIB_MIN) +#PRINTF_LIB = $(PRINTF_LIB_FLOAT) + + +# Minimalistic scanf version +SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min + +# Floating point + %[ scanf version (requires MATH_LIB = -lm below) +SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt + +# If this is left blank, then it will use the Standard scanf version. +SCANF_LIB = +#SCANF_LIB = $(SCANF_LIB_MIN) +#SCANF_LIB = $(SCANF_LIB_FLOAT) + + +MATH_LIB = -lm + + + +#---------------- External Memory Options ---------------- + +# 64 KB of external RAM, starting after internal RAM (ATmega128!), +# used for variables (.data/.bss) and heap (malloc()). +#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff + +# 64 KB of external RAM, starting after internal RAM (ATmega128!), +# only used for heap (malloc()). +#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff + +EXTMEMOPTS = + + + +#---------------- Linker Options ---------------- +# -Wl,...: tell GCC to pass this to linker. +# -Map: create map file +# --cref: add cross reference to map file +LDFLAGS = -Wl,-Map=$(TARGET).map,--cref +LDFLAGS += $(EXTMEMOPTS) +LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB) + + + +#---------------- Programming Options (avrdude) ---------------- + +# Programming hardware: alf avr910 avrisp bascom bsd +# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500 +# +# Type: avrdude -c ? +# to get a full listing. +# +#AVRDUDE_PROGRAMMER = arduino +AVRDUDE_PROGRAMMER = avr109 + +# com1 = serial port. Use lpt1 to connect to parallel port. +AVRDUDE_PORT = /dev/tty.usb* # programmer connected to serial device + +AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex +#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep + + +# Uncomment the following if you want avrdude's erase cycle counter. +# Note that this counter needs to be initialized first using -Yn, +# see avrdude manual. +#AVRDUDE_ERASE_COUNTER = -y + +# Uncomment the following if you do /not/ wish a verification to be +# performed after programming the device. +#AVRDUDE_NO_VERIFY = -V + +# Increase verbosity level. Please use this when submitting bug +# reports about avrdude. See +# to submit bug reports. +#AVRDUDE_VERBOSE = -v -v + +AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) -b 57600 +AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY) +AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE) +AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER) + + + +#---------------- Debugging Options ---------------- + +# For simulavr only - target MCU frequency. +DEBUG_MFREQ = $(F_CPU) + +# Set the DEBUG_UI to either gdb or insight. +# DEBUG_UI = gdb +DEBUG_UI = insight + +# Set the debugging back-end to either avarice, simulavr. +DEBUG_BACKEND = avarice +#DEBUG_BACKEND = simulavr + +# GDB Init Filename. +GDBINIT_FILE = __avr_gdbinit + +# When using avarice settings for the JTAG +JTAG_DEV = /dev/com1 + +# Debugging port used to communicate between GDB / avarice / simulavr. +DEBUG_PORT = 4242 + +# Debugging host used to communicate between GDB / avarice / simulavr, normally +# just set to localhost unless doing some sort of crazy debugging when +# avarice is running on a different computer. +DEBUG_HOST = localhost + + + +#============================================================================ + + +# Define programs and commands. +SHELL = sh +CC = avr-gcc +OBJCOPY = avr-objcopy +OBJDUMP = avr-objdump +SIZE = avr-size +NM = avr-nm +AVRDUDE = avrdude +REMOVE = rm -f +COPY = cp +WINSHELL = cmd + + +# Define Messages +# English +MSG_ERRORS_NONE = Errors: none +MSG_BEGIN = -------- begin -------- +MSG_END = -------- end -------- +MSG_SIZE_BEFORE = Size before: +MSG_SIZE_AFTER = Size after: +MSG_COFF = Converting to AVR COFF: +MSG_EXTENDED_COFF = Converting to AVR Extended COFF: +MSG_FLASH = Creating load file for Flash: +MSG_EEPROM = Creating load file for EEPROM: +MSG_EXTENDED_LISTING = Creating Extended Listing: +MSG_SYMBOL_TABLE = Creating Symbol Table: +MSG_LINKING = Linking: +MSG_COMPILING = Compiling: +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 + diff --git a/blog/driving_595/bitbang/main.c b/blog/driving_595/bitbang/main.c new file mode 100644 index 0000000..dc08351 --- /dev/null +++ b/blog/driving_595/bitbang/main.c @@ -0,0 +1,85 @@ +/* + * Code to write data to two daisychained TPIC6B595 SIPO shift registers. + * + * http://appelsiini.net/2011/driving-595-shift-registers + * + * The TPIC6B595 is a monolithic, high-voltage, medium-current power 8-bit + * shift register designed for use in systems that require relatively high + * load power. + * + * This device contains an 8-bit serial-in, parallel-out shift register that + * feeds an 8-bit D-type storage register. Data transfers through both the + * shift and storage registers on the rising edge of the shift-register clock + * (SRCK) and the register clock (RCK), respectively. The storage register + * transfers data to the output buffer when shift-register clear (SRCLR) is + * high. When SRCLR is low, the input shift register is cleared. When output + * enable (G) is held high, all data in the output buffers is held low and all + * drain outputs are off. When G is held low, data from the storage register + * is transparent to the output buffers. When data in the output buffers is + * low, the DMOS-transistor outputs are off. When data is high, the DMOS- + * transistor outputs have sink-current capability. The serial output (SER + * OUT) allows for cascading of the data from the shift register to additional + * devices. + * + * http://www.adafruit.com/datasheets/tpic6b595.pdf + * + * To compile and upload run: make clean; make; make program; + * + * Copyright 2012 Mika Tuupola + * + * Licensed under the MIT license: + * http://www.opensource.org/licenses/mit-license.php + * + */ + +#include + +#include "main.h" +#include "pins/digital.h" + +#define LATCH B0 /* RCK */ +#define CLOCK B1 /* SRCK */ +#define DATA B2 /* SER IN */ + +static void init(void) { + pin_mode(LATCH, OUTPUT); + pin_mode(CLOCK, OUTPUT); + pin_mode(DATA, OUTPUT); +} + +/* Assumes MSB first. */ +void shift_out(uint8_t data) { + for(uint8_t i = 0; i < 8; i++) { + /* Write bit to data port. */ + if (0 == (data & _BV(7 - i))) { + digital_write(DATA, LOW); + } else { + digital_write(DATA, HIGH); + } + + /* Pulse clock input to write next bit. */ + digital_write(CLOCK, LOW); + digital_write(CLOCK, HIGH); + } +} + +int main(void) { + + init(); + + for(uint16_t i = 0; i < 0xffff; i++) { + + /* Shift high byte first to shift register. */ + shift_out(i >> 8); + shift_out(i & 0xff); + + /* Pulse latch to transfer data from shift registers */ + /* to storage registers. */ + digital_write(LATCH, LOW); + digital_write(LATCH, HIGH); + + _delay_ms(50); + } + return 0; + +} diff --git a/blog/driving_595/bitbang/main.h b/blog/driving_595/bitbang/main.h new file mode 100644 index 0000000..6ba754e --- /dev/null +++ b/blog/driving_595/bitbang/main.h @@ -0,0 +1,2 @@ +static void init(void); +int main(void); diff --git a/blog/driving_595/bitbang/pins/arduino.h b/blog/driving_595/bitbang/pins/arduino.h new file mode 100644 index 0000000..b5089b8 --- /dev/null +++ b/blog/driving_595/bitbang/pins/arduino.h @@ -0,0 +1,72 @@ +/* + * arduino.h + * + * Lightweight macro implementation of Arduino style pin numbering + * for accessing Atmel digital and analog pins. + * + * pin_mode(1, OUTPUT); + * digital_write(1, HIGH); + * pin_mode(2, INPUT); + * digital_read(2); + * + * This file is based on Arduino project. + * https://github.com/arduino/Arduino/ + * + * Copyright (c) 2007-2011 David A. Mellis, Mika tuupola + * + * Licensed under the LGPL 2.1 license: + * http://www.opensource.org/licenses/lgpl-2.1.php + */ + +#ifndef ARDUINO_H +#define ARDUINO_H + +/* atmega328 */ +#define PORT_AT_PIN_0 PortD +#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 +#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 +#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 + +#define MASK_AT_PIN_0 _BV(0) +#define MASK_AT_PIN_1 _BV(1) +#define MASK_AT_PIN_2 _BV(2) +#define MASK_AT_PIN_3 _BV(3) +#define MASK_AT_PIN_4 _BV(4) +#define MASK_AT_PIN_5 _BV(5) +#define MASK_AT_PIN_6 _BV(6) +#define MASK_AT_PIN_7 _BV(7) +#define MASK_AT_PIN_8 _BV(0) +#define MASK_AT_PIN_9 _BV(1) +#define MASK_AT_PIN_10 _BV(2) +#define MASK_AT_PIN_11 _BV(3) +#define MASK_AT_PIN_12 _BV(4) +#define MASK_AT_PIN_13 _BV(5) +#define MASK_AT_PIN_14 _BV(0) +#define MASK_AT_PIN_15 _BV(1) +#define MASK_AT_PIN_16 _BV(2) +#define MASK_AT_PIN_17 _BV(3) +#define MASK_AT_PIN_18 _BV(4) +#define MASK_AT_PIN_19 _BV(5) +#define MASK_AT_PIN_20 _BV(6) +#define MASK_AT_PIN_21 _BV(7) + +#endif /* ARDUINO_H */ diff --git a/blog/driving_595/bitbang/pins/digital.h b/blog/driving_595/bitbang/pins/digital.h new file mode 100644 index 0000000..82da4e4 --- /dev/null +++ b/blog/driving_595/bitbang/pins/digital.h @@ -0,0 +1,33 @@ +/* + * digital.h + * + * Lightweight macro implementation of AVR pin numbering for + * accessing Atmel digital and analog pins. + * + * pin_mode(A1, OUTPUT); + * digital_write(A1, HIGH); + * pin_mode(A2, INPUT); + * digital_read(A2); + * + * This file is based on the excellent ArduinoLite project by + * Shikai Chen . + * + * http://code.google.com/p/arduino-lite/ + * http://www.csksoft.net/ + * + * Copyright (c) 2010-2011 Shikai Chen, Mika Tuupola + * + * 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(_DIGITAL_READ, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) +#define digital_read_raw(pin) EXPAND_WRAPPER(_DIGITAL_READ_RAW, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) +#define digital_write(pin, val) DIGITAL_WRITE_##val(pin) +#define digital_toggle(pin) EXPAND_WRAPPER(_DIGITAL_TOGGLE, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) + +#endif /* DIGITAL_H */ \ No newline at end of file diff --git a/blog/driving_595/bitbang/pins/pins.h b/blog/driving_595/bitbang/pins/pins.h new file mode 100644 index 0000000..1cce133 --- /dev/null +++ b/blog/driving_595/bitbang/pins/pins.h @@ -0,0 +1,228 @@ +/* + * pins.h + * + * Lightweight macro implementation of AVR pin numbering for + * accessing Atmel digital and analog pins. + * + * pin_mode(A1, OUTPUT); + * digital_write(A1, HIGH); + * pin_mode(A2, INPUT); + * digital_read(A2); + * + * This file is based on the excellent ArduinoLite project by + * Shikai Chen . + * + * http://code.google.com/p/arduino-lite/ + * http://www.csksoft.net/ + * + * Copyright (c) 2010-2011 Shikai Chen, Mika Tuupola + * + * Licensed under the LGPL 2.1 license: + * http://www.opensource.org/licenses/lgpl-2.1.php + */ + +#ifndef PINS_H +#define PINS_H + +#include +#include + +#include "arduino.h" + +#define HIGH 0x1 +#define LOW 0x0 + +#define INPUT 0x0 +#define OUTPUT 0x1 + +#define ENABLE 0x1 +#define DISABLE 0x0 + +#define PIN_TO_PORT(x) PORT_AT_PIN_##x +#define PIN_TO_MASK(x) MASK_AT_PIN_##x + +#define PORT_TO_DIRECTION_REGISTER(x) DIRECTION_REGISTER_AT_##x +#define PORT_TO_OUTPUT_REGISTER(x) OUTPUT_REGISTER_AT_##x +#define PORT_TO_INPUT_REGISTER(x) INPUT_REGISTER_AT_##x + +#ifdef PORTA +#define DIRECTION_REGISTER_AT_PortA DDRA +#define OUTPUT_REGISTER_AT_PortA PORTA +#define INPUT_REGISTER_AT_PortA PINA + +#define PORT_AT_PIN_A0 PortA +#define PORT_AT_PIN_A1 PortA +#define PORT_AT_PIN_A2 PortA +#define PORT_AT_PIN_A3 PortA +#define PORT_AT_PIN_A4 PortA +#define PORT_AT_PIN_A5 PortA +#define PORT_AT_PIN_A6 PortA +#define PORT_AT_PIN_A7 PortA + +#define MASK_AT_PIN_A0 _BV(0) +#define MASK_AT_PIN_A1 _BV(1) +#define MASK_AT_PIN_A2 _BV(2) +#define MASK_AT_PIN_A3 _BV(3) +#define MASK_AT_PIN_A4 _BV(4) +#define MASK_AT_PIN_A5 _BV(5) +#define MASK_AT_PIN_A6 _BV(6) +#define MASK_AT_PIN_A7 _BV(7) +#endif + +#ifdef PORTB +#define DIRECTION_REGISTER_AT_PortB DDRB +#define OUTPUT_REGISTER_AT_PortB PORTB +#define INPUT_REGISTER_AT_PortB PINB + +#define PORT_AT_PIN_B0 PortB +#define PORT_AT_PIN_B1 PortB +#define PORT_AT_PIN_B2 PortB +#define PORT_AT_PIN_B3 PortB +#define PORT_AT_PIN_B4 PortB +#define PORT_AT_PIN_B5 PortB +#define PORT_AT_PIN_B6 PortB +#define PORT_AT_PIN_B7 PortB + +#define MASK_AT_PIN_B0 _BV(0) +#define MASK_AT_PIN_B1 _BV(1) +#define MASK_AT_PIN_B2 _BV(2) +#define MASK_AT_PIN_B3 _BV(3) +#define MASK_AT_PIN_B4 _BV(4) +#define MASK_AT_PIN_B5 _BV(5) +#define MASK_AT_PIN_B6 _BV(6) +#define MASK_AT_PIN_B7 _BV(7) +#endif + +#ifdef PORTC +#define DIRECTION_REGISTER_AT_PortC DDRC +#define OUTPUT_REGISTER_AT_PortC PORTC +#define INPUT_REGISTER_AT_PortC PINC + +#define PORT_AT_PIN_C0 PortC +#define PORT_AT_PIN_C1 PortC +#define PORT_AT_PIN_C2 PortC +#define PORT_AT_PIN_C3 PortC +#define PORT_AT_PIN_C4 PortC +#define PORT_AT_PIN_C5 PortC +#define PORT_AT_PIN_C6 PortC +#define PORT_AT_PIN_C7 PortC + +#define MASK_AT_PIN_C0 _BV(0) +#define MASK_AT_PIN_C1 _BV(1) +#define MASK_AT_PIN_C2 _BV(2) +#define MASK_AT_PIN_C3 _BV(3) +#define MASK_AT_PIN_C4 _BV(4) +#define MASK_AT_PIN_C5 _BV(5) +#define MASK_AT_PIN_C6 _BV(6) +#define MASK_AT_PIN_C7 _BV(7) +#endif + +#ifdef PORTD +#define DIRECTION_REGISTER_AT_PortD DDRD +#define OUTPUT_REGISTER_AT_PortD PORTD +#define INPUT_REGISTER_AT_PortD PIND +#define PORT_AT_PIN_D0 PortD +#define PORT_AT_PIN_D1 PortD +#define PORT_AT_PIN_D2 PortD +#define PORT_AT_PIN_D3 PortD +#define PORT_AT_PIN_D4 PortD +#define PORT_AT_PIN_D5 PortD +#define PORT_AT_PIN_D6 PortD +#define PORT_AT_PIN_D7 PortD +#define MASK_AT_PIN_D0 _BV(0) +#define MASK_AT_PIN_D1 _BV(1) +#define MASK_AT_PIN_D2 _BV(2) +#define MASK_AT_PIN_D3 _BV(3) +#define MASK_AT_PIN_D4 _BV(4) +#define MASK_AT_PIN_D5 _BV(5) +#define MASK_AT_PIN_D6 _BV(6) +#define MASK_AT_PIN_D7 _BV(7) +#endif + +#ifdef PORTE +#define DIRECTION_REGISTER_AT_PortE DDRE +#define OUTPUT_REGISTER_AT_PortE PORTE +#define INPUT_REGISTER_AT_PortE PINE + +#define PORT_AT_PIN_E0 PortE +#define PORT_AT_PIN_E1 PortE +#define PORT_AT_PIN_E2 PortE +#define PORT_AT_PIN_E3 PortE +#define PORT_AT_PIN_E4 PortE +#define PORT_AT_PIN_E5 PortE +#define PORT_AT_PIN_E6 PortE +#define PORT_AT_PIN_E7 PortE + +#define MASK_AT_PIN_E0 _BV(0) +#define MASK_AT_PIN_E1 _BV(1) +#define MASK_AT_PIN_E2 _BV(2) +#define MASK_AT_PIN_E3 _BV(3) +#define MASK_AT_PIN_E4 _BV(4) +#define MASK_AT_PIN_E5 _BV(5) +#define MASK_AT_PIN_E6 _BV(6) +#define MASK_AT_PIN_E7 _BV(7) +#endif + +#ifdef PORTF +#define DIRECTION_REGISTER_AT_PortF DDRF +#define OUTPUT_REGISTER_AT_PortF PORTF +#define INPUT_REGISTER_AT_PortF PINF + +#define PORT_AT_PIN_F0 PortF +#define PORT_AT_PIN_F1 PortF +#define PORT_AT_PIN_F2 PortF +#define PORT_AT_PIN_F3 PortF +#define PORT_AT_PIN_F4 PortF +#define PORT_AT_PIN_F5 PortF +#define PORT_AT_PIN_F6 PortF +#define PORT_AT_PIN_F7 PortF + +#define MASK_AT_PIN_F0 _BV(0) +#define MASK_AT_PIN_F1 _BV(1) +#define MASK_AT_PIN_F2 _BV(2) +#define MASK_AT_PIN_F3 _BV(3) +#define MASK_AT_PIN_F4 _BV(4) +#define MASK_AT_PIN_F5 _BV(5) +#define MASK_AT_PIN_F6 _BV(6) +#define MASK_AT_PIN_F7 _BV(7) +#endif + +#define MERGE_TO_FUNC(prefix, id) prefix##_##id +#define EXPAND_WRAPPER(NEXTLEVEL, ...) NEXTLEVEL(__VA_ARGS__) + +#define _SET_OUTPUT(port_id, msk) PORT_TO_DIRECTION_REGISTER(port_id) |= (msk) +#define _SET_INPUT(port_id, msk) PORT_TO_DIRECTION_REGISTER(port_id) &= ~(msk) + +#define _DIGITAL_WRITE_HIGH(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) |= (msk) +#define _DIGITAL_WRITE_LOW(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) &= ~(msk) + +#define _DIGITAL_READ_RAW(port_id, msk) ((PORT_TO_INPUT_REGISTER(port_id)) & (msk)) +#define _DIGITAL_READ(port_id, msk) (((PORT_TO_INPUT_REGISTER(port_id)) & (msk)) != 0 ? 1 : 0) + +#define _DIGITAL_TOGGLE(port_id, msk) PORT_TO_OUTPUT_REGISTER(port_id) ^= (msk) + +#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 DIGITAL_WRITE_HIGH(pin) EXPAND_WRAPPER(_DIGITAL_WRITE_HIGH, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) +#define DIGITAL_WRITE_LOW(pin) EXPAND_WRAPPER(_DIGITAL_WRITE_LOW, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) + +#define DIGITAL_WRITE_1(pin) DIGITAL_WRITE_HIGH(pin) +#define DIGITAL_WRITE_0(pin) DIGITAL_WRITE_LOW(pin) + +#define DIGITAL_WRITE_0x1(pin) DIGITAL_WRITE_HIGH(pin) +#define DIGITAL_WRITE_0x0(pin) DIGITAL_WRITE_LOW(pin) + +#define DIGITAL_WRITE_ENABLE(pin) DIGITAL_WRITE_HIGH(pin) +#define DIGITAL_WRITE_DISABLE(pin) DIGITAL_WRITE_LOW(pin) + +#define SET_OUTPUT(pin) EXPAND_WRAPPER(_SET_OUTPUT, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) +#define SET_INPUT(pin) EXPAND_WRAPPER(_SET_INPUT, PIN_TO_PORT(pin), PIN_TO_MASK(pin)) + +#define pin_mode(pin, mode) SET_##mode(pin) +#define pin_pullup(pin, val) DIGITAL_WRITE_##val(pin) + +#endif /* PINS_H */