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Add shifting example of two daisy chained 74HC165 PISO registers.

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This commit is contained in:
Mika Tuupola 2011-10-19 22:16:27 +03:00
parent 9e33675bec
commit 4bbc74adb4
8 changed files with 1318 additions and 0 deletions
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74hc165_shiftin/Makefile Normal file
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# ----------------------------------------------------------------------------
# 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
# 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 = $(TARGET).c uart_async.c
# List Assembler source files here.
# Make them always end in a capital .S. Files ending in a lowercase .s
# will not be considered source files but generated files (assembler
# output from the compiler), and will be deleted upon "make clean"!
# Even though the DOS/Win* filesystem matches both .s and .S the same,
# it will preserve the spelling of the filenames, and gcc itself does
# care about how the name is spelled on its command-line.
ASRC =
# Optimization level, can be [0, 1, 2, 3, s].
# 0 = turn off optimization. s = optimize for size.
# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
OPT = s
# Debugging format.
# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
# AVR Studio 4.10 requires dwarf-2.
# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
DEBUG = dwarf-2
# List any extra directories to look for include files here.
# Each directory must be seperated by a space.
# Use forward slashes for directory separators.
# For a directory that has spaces, enclose it in quotes.
EXTRAINCDIRS =
# Compiler flag to set the C Standard level.
# c89 = "ANSI" C
# gnu89 = c89 plus GCC extensions
# c99 = ISO C99 standard (not yet fully implemented)
# gnu99 = c99 plus GCC extensions
CSTANDARD = -std=gnu99
# Place -D or -U options here
CDEFS = -DF_CPU=$(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) $(MATH_LIB)
#---------------- Programming Options (avrdude) ----------------
# Programming hardware: alf avr910 avrisp bascom bsd
# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
#
# Type: avrdude -c ?
# to get a full listing.
#
AVRDUDE_PROGRAMMER = arduino
# com1 = serial port. Use lpt1 to connect to parallel port.
AVRDUDE_PORT = /dev/tty.usb* # programmer connected to serial device
AVRDUDE_WRITE_FLASH = -U flash:w:$(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 <http://savannah.nongnu.org/projects/avrdude>
# 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

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/*
* 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 */

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/*
* Code to read in data from two daisychained 74HC165 PISO shift registers.
*
* The SN74HC165 is an 8-bit parallel-load shift register that, when clocked,
* shift the data toward a serial (QH) output. Parallel-in access to each
* stage is provided by eight individual direct data (A−H) inputs that are
* enabled by a low level at the shift/load (SH/LD) input. The SN74HC165 also
* features a clock-inhibit (CLK INH) function and a complementary serial (QH)
* output.
*
* Clocking is accomplished by a low-to-high transition of the clock (CLK)
* input while SH/LD is held high and CLK INH is held low. The functions of
* CLK and CLK INH are interchangeable. Since a low CLK and a low-to-high
* transition of CLK INH also accomplish clocking, CLK INH should be changed
* to the high level only while CLK is high. Parallel loading is inhibited
* when SH/LD is held high. While SH/LD is low, the parallel inputs to the
* register are enabled independently of the levels of the CLK, CLK INH, or
* serial (SER) input
*
* http://www.datasheetcatalog.org/datasheet2/8/0ue9fx650zw5716zs9zch6ks5uwy.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 <avr/sfr_defs.h>
#include "main.h"
#include "uart.h"
#include "pins.h"
#include "digital.h"
#define LATCH 8 /* sh/ld */
#define CLOCK 12 /* clk */
#define DATA 13 /* qh */
static void init(void) {
pin_mode(LATCH, OUTPUT);
pin_mode(CLOCK, OUTPUT);
pin_mode(DATA, INPUT);
}
int shiftin(void) {
uint8_t byte = 0;
uint8_t pin_value;
for(int i=0; i<8; i++) {
pin_value = digital_read(DATA);
byte |= (pin_value << ((8 - 1) - i));
printf("%d = %d \n", ((8 - 1) - i), pin_value);
/* Pulse clock input (CP) LOW-HIGH to read next bit. */
digital_write(CLOCK, LOW);
//_delay_ms(10);
digital_write(CLOCK, HIGH);
}
return byte;
}
int main(void) {
init();
uart_init();
stdout = &uart_output;
stdin = &uart_input;
uint8_t register_value;
while (1) {
/* Read in parallel input by setting SH/LD low. */
digital_write(LATCH, LOW);
//_delay_ms(10);
/* Freeze data by setting SH/LD high. When SH/LD is high data enters */
/* to reqisters from SER input and shifts one place to the right */
/* (Q0 -> Q1 -> Q2, etc.) with each positive-going clock transition. */
digital_write(LATCH, HIGH);
/* Read in first 74HC165 data. */
register_value = shiftin();
printf("%d \n", register_value);
/* Read in second 74HC165 data. */
register_value = shiftin();
printf("%d \n", register_value);
_delay_ms(2000);
}
return 0;
}

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static void init(void);
int shiftin(void);
int main(void);

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74hc165_shiftin/pins.h Normal file
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/*
* 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 */

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74hc165_shiftin/uart.h Normal file
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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);

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/* 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);
}
}