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i2c serial passthrough

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commit d29a28c03a729fedac401995d60e57bd6f711395 1 parent b875ff1
@imrcly imrcly authored
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  1. +0 −510 Makefile
  2. +0 −248 main.c
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510 Makefile
@@ -1,510 +0,0 @@
-# Hey Emacs, this is a -*- makefile -*-
-#----------------------------------------------------------------------------
-# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
-#
-# Released to the Public Domain
-#
-# Additional material for this makefile was written by:
-# Peter Fleury
-# Tim Henigan
-# Colin O'Flynn
-# Reiner Patommel
-# Markus Pfaff
-# Sander Pool
-# Frederik Rouleau
-#
-#----------------------------------------------------------------------------
-# 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
-AVRDUDEMCU = m328p
-
-
-# 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 = 8000000
-
-
-# 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 = ../genericLib/i2c.c $(TARGET).c
-
-
-# List Assembler source files here.
-# Make them always end in a capital .S. Files ending in a lowercase .s
-# will not be considered source files but generated files (assembler
-# output from the compiler), and will be deleted upon "make clean"!
-# Even though the DOS/Win* filesystem matches both .s and .S the same,
-# it will preserve the spelling of the filenames, and gcc itself does
-# care about how the name is spelled on its command-line.
-ASRC =
-
-
-# Optimization level, can be [0, 1, 2, 3, s].
-# 0 = turn off optimization. s = optimize for size.
-# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
-OPT = s
-
-
-# Debugging format.
-# Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
-# AVR Studio 4.10 requires dwarf-2.
-# AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
-DEBUG = dwarf-2
-
-
-# List any extra directories to look for include files here.
-# Each directory must be seperated by a space.
-# Use forward slashes for directory separators.
-# For a directory that has spaces, enclose it in quotes.
-EXTRAINCDIRS = ../genericLib/
-
-
-# Compiler flag to set the C Standard level.
-# c89 = "ANSI" C
-# gnu89 = c89 plus GCC extensions
-# c99 = ISO C99 standard (not yet fully implemented)
-# gnu99 = c99 plus GCC extensions
-CSTANDARD = -std=gnu99
-
-
-# Place -D or -U options here
-CDEFS = -DF_CPU=$(F_CPU)UL
-
-
-# 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) $(MATH_LIB)
-
-
-
-#---------------- Programming Options (avrdude) ----------------
-
-# Programming hardware: alf avr910 avrisp bascom bsd
-# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
-#
-# Type: avrdude -c ?
-# to get a full listing.
-#
-AVRDUDE_PROGRAMMER = dragon_isp
-
-# com1 = serial port. Use lpt1 to connect to parallel port.
-AVRDUDE_PORT = usb
-
-AVRDUDE_WRITE_FLASH = -U flash:w:$(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 $(AVRDUDEMCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
-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
-
-
-
View
248 main.c
@@ -1,248 +0,0 @@
-#include <stdio.h>
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <avr/pgmspace.h>
-
-#include <i2c.h>
-
-//#define BAUD 9600
-//38400 Baud
-#define MYUBRR 12
-#define BUFFERSIZE 500
-
-#define ERROR -1
-#define I2CSTART -2
-#define I2CSTOP -3
-#define I2CACK -4
-#define I2CNACK -5
-
-#define getSDA (PINC >> PINC4)
-#define getSCL (PINC >> PINC5)
-
-#define GETLINEMAX 200
-
-//Define functions
-//======================
-void ioinit(void); // initializes IO
-static int uart_putchar(char c, FILE *stream);
-uint8_t uart_getchar(void);
-void getDebugDataFromI2CBus(uint8_t receiveDataLength, uint8_t *recieveData);
-void printAsciiValues(void);
-void termAttent(void);
-uint8_t getLine(char *outputBuffer);
-
-static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
-//======================
-
-//Globals
-uint8_t sdaNew, sdaOld;
-uint8_t sclNew, sclOld;
-
-uint8_t dataState, dataBits;
-
-uint8_t data, tempData;
-
-int16_t buffer[BUFFERSIZE];
-
-uint16_t start, end;
-
-uint8_t termAttention = 0;
-
-int main (void)
-{
- ioinit(); //Setup IO pins and defaults
- i2cSetTheDamnTWBRMyself(8);
- i2cSetLocalDeviceAddr(0b00001110, 0x00, 0, 0, 0);
- i2cSetSlaveReceiveHandler(getDebugDataFromI2CBus);
-
- printf_P(PSTR("I2C Sniffing is Alive\n\nPress '!' to get the terminal's attention\n\n"));
-
- sei();
-
-
- while(1)
- {
- if(termAttention == 0)
- {
- printAsciiValues();
- } else {
- termAttent();
- }
- }
-
- return(0);
-}
-
-void termAttent(void)
-{
- cli();
- printf_P(PSTR("White Star Balloons\n\nGround Support Suite Version -1.0\n\n"
- "Caveats:\n - Right now, I can only Send Data, then immediately exit to allow others\n"
- " to send me debug data after I tell them to do something.\n"
- " - I disable interrupts while I'm taking your input, so hurry up!\n"
- " - I hope your terminal only sends the \\r character for new lines!\n"
- " - DO NOT PRESS BACKSPACE\n\n"));
- printf_P(PSTR("You have my attention. I've disabled interrupts, so this had better be good.\n"));
- printf_P(PSTR("Who Should I address? (Form: 0x00, 7 bit shifted left)\n"));
- char inputBuff[GETLINEMAX];
- uint8_t charsGot = getLine(inputBuff);
- if(charsGot == 1 && inputBuff[0] == 's')
- {
- printf_P(PSTR("You have discovered the Colonel's Secret Recipe!\n"
- "[1] Tell Flight Computer to dump Vars\n"
- "[2] Tell Flight Computer to reset Vars\n"));
- charsGot = getLine(inputBuff);
- } else {
- uint8_t address;
- uint8_t matches = sscanf(inputBuff, "%x", &address);
- if(matches != 1)
- {
- printf_P(PSTR("Error in parsing\n"));
- goto leave;
- }
- printf_P(PSTR("How Many Bytes you want?\n"));
- charsGot = getLine(inputBuff);
- uint8_t bytes;
- matches = sscanf(inputBuff, "%d", &bytes);
- if(matches != 1)
- {
- printf_P(PSTR("Error in parsing\n"));
- goto leave;
- }
- printf_P(PSTR("Bytes: %d\n"), bytes);
- uint8_t data[20];
- for(int i=0; i < bytes; i++)
- {
- printf_P(PSTR("Byte %d (0x00, hex):"), i);
- charsGot = getLine(inputBuff);
- sscanf(inputBuff, "%x", &data[i]);
- if(matches != 1)
- {
- printf_P(PSTR("Error in parsing\n"));
- goto leave;
- }
- }
- uint8_t status = i2cMasterSendNI(address, bytes, data);
- if(status != I2C_OK)
- {
- printf_P(PSTR("ERROR IN SENDING! Error Code: %d\n"), status);
- }
- }
-
- leave:
- termAttention = 0;
- sei();
- printf("Returning...\n");
-}
-
-uint8_t getLine(char *outputBuffer)
-{
- int8_t bufferLoader=0;
- while((outputBuffer[bufferLoader] = (char)uart_getchar()) != '\r' && bufferLoader < GETLINEMAX)
- {
- uart_putchar(outputBuffer[bufferLoader], stdout);
- bufferLoader++;
- }
- printf("\n");
- return bufferLoader;
-}
-
-char ReceivedByte;
-
-ISR(USART_RX_vect)
-{
- ReceivedByte = UDR0; // Fetch the received byte value into the variable "ByteReceived"
-
- UDR0 = ReceivedByte; // Echo back the received byte back to the computer
-
- if(ReceivedByte == '!')
- {
- termAttention = 1;
- }
-}
-
-
-void getDebugDataFromI2CBus(uint8_t receiveDataLength, uint8_t *recieveData)
-{
- //printf("length: %d\n", receiveDataLength);
- if(recieveData[0] == 0x05)
- {
- int i = 1;
- for(i; i < receiveDataLength; i++)
- {
- buffer_add((uint16_t)recieveData[i]);
- //printf("1: %d 2: %c\n", i, recieveData[i]);
- }
- }
-}
-
-void printAsciiValues(void)
-{
-
- int16_t print = buffer_get();
- if(print > -1)
- {
- printf("%c", (char)print);
- }
-
-}
-
-void ioinit (void)
-{
- //1 = output, 0 = input
- DDRD = 0b11111110; //PORTD (RX on PD0)
- DDRC = 0b00000000;
- PORTC = 0b00110000;
-
- UBRR0H = MYUBRR >> 8;
- UBRR0L = MYUBRR;
- UCSR0B = (1<<RXEN0)|(1<<TXEN0)|(1<<RXCIE0);
-
- stdout = &mystdout; //Required for printf init
-
- i2cInit();
- /*PCICR |= _BV(1); //PCIE1, Enable Pin Change Interrups 8-14.
- PCMSK1 |= _BV(4) | _BV(5); // Turn on PCINT12 and 13.
-
- sdaOld = sdaNew = getSDA;
- sclOld = sclNew = getSCL;*/
-}
-
-static int uart_putchar(char c, FILE *stream)
-{
- if (c == '\n') uart_putchar('\r', stream);
-
- loop_until_bit_is_set(UCSR0A, UDRE0);
- UDR0 = c;
-
- return 0;
-}
-
-uint8_t uart_getchar(void)
-{
- while( !(UCSR0A & (1<<RXC0)) );
- return(UDR0);
-}
-
-void buffer_add(int16_t b)
-{
-
- if ((end + 1) % BUFFERSIZE != start) {
- buffer[end] = b;
- end = (end + 1) % BUFFERSIZE;
- } else {
- printf("BUFFER FULL!\n");
- }
-
-}
-
-int16_t buffer_get(void)
-{
- if (end != start) {
- int16_t temp = buffer[start];
- start = (start + 1) % BUFFERSIZE;
- return(temp);
- }
- //otherwise, the buffer is empty; return an error code
- return -1;
-}
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