diff --git a/poc/avr_sdcard/.cproject b/poc/avr_sdcard/.cproject
new file mode 100644
index 0000000..a261c3c
--- /dev/null
+++ b/poc/avr_sdcard/.cproject
@@ -0,0 +1,146 @@
+
+
+
+
+
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diff --git a/poc/avr_sdcard/.project b/poc/avr_sdcard/.project
new file mode 100644
index 0000000..6236c85
--- /dev/null
+++ b/poc/avr_sdcard/.project
@@ -0,0 +1,78 @@
+
+
+ avr_sdcard
+
+
+
+
+
+ org.eclipse.cdt.managedbuilder.core.genmakebuilder
+ clean,full,incremental,
+
+
+ ?name?
+
+
+
+ org.eclipse.cdt.make.core.append_environment
+ true
+
+
+ org.eclipse.cdt.make.core.autoBuildTarget
+ all
+
+
+ org.eclipse.cdt.make.core.buildArguments
+
+
+
+ org.eclipse.cdt.make.core.buildCommand
+ make
+
+
+ org.eclipse.cdt.make.core.cleanBuildTarget
+ clean
+
+
+ org.eclipse.cdt.make.core.contents
+ org.eclipse.cdt.make.core.activeConfigSettings
+
+
+ org.eclipse.cdt.make.core.enableAutoBuild
+ false
+
+
+ org.eclipse.cdt.make.core.enableCleanBuild
+ true
+
+
+ org.eclipse.cdt.make.core.enableFullBuild
+ true
+
+
+ org.eclipse.cdt.make.core.fullBuildTarget
+ all
+
+
+ org.eclipse.cdt.make.core.stopOnError
+ true
+
+
+ org.eclipse.cdt.make.core.useDefaultBuildCmd
+ true
+
+
+
+
+ org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder
+
+
+
+
+
+ org.eclipse.cdt.core.cnature
+ org.eclipse.cdt.managedbuilder.core.ScannerConfigNature
+ org.eclipse.cdt.managedbuilder.core.managedBuildNature
+ de.innot.avreclipse.core.avrnature
+
+
diff --git a/poc/avr_sdcard/Makefile b/poc/avr_sdcard/Makefile
new file mode 100644
index 0000000..6f5a58a
--- /dev/null
+++ b/poc/avr_sdcard/Makefile
@@ -0,0 +1,453 @@
+# Hey Emacs, this is a -*- makefile -*-
+#
+# WinAVR makefile written by Eric B. Weddington, Jörg Wunsch, et al.
+# Released to the Public Domain
+# Please read the make user manual!
+#
+# Additional material for this makefile was submitted by:
+# Tim Henigan
+# Peter Fleury
+# Reiner Patommel
+# Sander Pool
+# Frederik Rouleau
+# Markus Pfaff
+#
+# On command line:
+#
+# make all = Make software.
+#
+# make clean = Clean out built project files.
+#
+# make coff = Convert ELF to AVR COFF (for use with AVR Studio 3.x or VMLAB).
+#
+# make extcoff = Convert ELF to AVR Extended COFF (for use with AVR Studio
+# 4.07 or greater).
+#
+# make program = Download the hex file to the device, using avrdude. Please
+# customize the avrdude settings below first!
+#
+# make filename.s = Just compile filename.c into the assembler code only
+#
+# To rebuild project do "make clean" then "make all".
+#
+
+# mth 2004/09
+# Differences from WinAVR 20040720 sample:
+# - DEPFLAGS according to Eric Weddingtion's fix (avrfreaks/gcc-forum)
+# - F_OSC Define in CFLAGS and AFLAGS
+
+
+# MCU name
+MCU = atmega8
+
+# Main Oscillator Frequency
+# This is only used to define F_OSC in all assembler and c-sources.
+F_OSC = 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 = $(TARGET).c uart.c fat.c mmc.c
+
+
+# List Assembler source files here.
+# Make them always end in a capital .S. Files ending in a lowercase .s
+# will not be considered source files but generated files (assembler
+# output from the compiler), and will be deleted upon "make clean"!
+# Even though the DOS/Win* filesystem matches both .s and .S the same,
+# it will preserve the spelling of the filenames, and gcc itself does
+# care about how the name is spelled on its command-line.
+ASRC =
+
+
+
+# Optimization level, can be [0, 1, 2, 3, s].
+# 0 = turn off optimization. s = optimize for size.
+# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
+OPT = s
+
+# Debugging format.
+# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
+# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
+#DEBUG = stabs
+#DEBUG = dwarf-2
+
+# List any extra directories to look for include files here.
+# Each directory must be seperated by a space.
+EXTRAINCDIRS =
+
+
+# Compiler flag to set the C Standard level.
+# c89 - "ANSI" C
+# gnu89 - c89 plus GCC extensions
+# c99 - ISO C99 standard (not yet fully implemented)
+# gnu99 - c99 plus GCC extensions
+CSTANDARD = -std=gnu99
+
+# Place -D or -U options here
+CDEFS =
+
+# Place -I options here
+CINCS =
+
+
+# Compiler flags.
+# -g*: generate debugging information
+# -O*: optimization level
+# -f...: tuning, see GCC manual and avr-libc documentation
+# -Wall...: warning level
+# -Wa,...: tell GCC to pass this to the assembler.
+# -adhlns...: create assembler listing
+CFLAGS = -g$(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 += $(CSTANDARD)
+CFLAGS += -DF_OSC=$(F_OSC)
+CFLAGS += -DF_CPU=8000000UL
+#CFLAGS += -DF_CPU=3686400UL
+
+
+# Assembler flags.
+# -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=$(<:.S=.lst),-gstabs
+ASFLAGS += -DF_OSC=$(F_OSC)
+
+
+#Additional libraries.
+
+# 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
+
+PRINTF_LIB =
+
+# 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
+
+SCANF_LIB =
+
+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 flags.
+# -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_MIN) $(SCANF_LIB) $(MATH_LIB)
+
+
+
+
+# Programming support using avrdude. Settings and variables.
+
+# Programming hardware: alf avr910 avrisp bascom bsd
+# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
+#
+# Type: avrdude -c ?
+# to get a full listing.
+#
+AVRDUDE_PROGRAMMER = stk500v2
+
+# com1 = serial port. Use lpt1 to connect to parallel port.
+AVRDUDE_PORT = /dev/ttyUSB0 # programmer connected to serial device
+
+AVRDUDE_WRITE_FLASH = -U flash:w:$(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)
+AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
+AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
+AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
+
+#
+# Mega8 set to internal 4mhz
+# avrdude -p atmega8 -P /dev/ttyUSB0 -c stk500v2 -U lfuse:w:0xe3:m
+#
+
+
+#flashmac:
+# uisp -dprog=avr910 -dpart=ATmega8 -dserial=/dev/cu.PL2303-00002326 --erase -v --upload if=$(TARGET).hex
+
+
+
+
+
+# ---------------------------------------------------------------------------
+
+# Define directories, if needed.
+DIRAVR = c:/winavr
+DIRAVRBIN = $(DIRAVR)/bin
+DIRAVRUTILS = $(DIRAVR)/utils/bin
+DIRINC = .
+DIRLIB = $(DIRAVR)/avr/lib
+
+
+# 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
+
+
+
+
+# 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 = $(ASRC:.S=.lst) $(SRC:.c=.lst)
+
+
+# Compiler flags to generate dependency files.
+### GENDEPFLAGS = -Wp,-M,-MP,-MT,$(*F).o,-MF,.dep/$(@F).d
+GENDEPFLAGS = -MD -MP -MF .dep/$(@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 finished 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)
+
+finished:
+ @echo $(MSG_ERRORS_NONE)
+
+end:
+ @echo $(MSG_END)
+ @echo
+
+
+# Display size of file.
+HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
+ELFSIZE = $(SIZE) -A $(TARGET).elf
+sizebefore:
+ @if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi
+
+sizeafter:
+ @if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi
+
+
+
+# Display compiler version information.
+gccversion :
+ @$(CC) --version
+
+
+
+# Program the device.
+
+flash_avrdude: flash
+
+flash: $(TARGET).hex $(TARGET).eep
+ sudo $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
+
+flash_uisp:
+ sudo uisp -dprog=avr910 -dpart=ATmega8 -dserial=/dev/ttyUSB0 --verify --erase -v --upload if=$(TARGET).hex
+
+
+
+# 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) $(OBJ) --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 $@
+
+
+
+# Target: clean project.
+clean: begin clean_list finished end
+
+clean_list :
+ @echo
+ @echo $(MSG_CLEANING)
+ $(REMOVE) $(TARGET).hex
+ $(REMOVE) $(TARGET).eep
+ $(REMOVE) $(TARGET).obj
+ $(REMOVE) $(TARGET).cof
+ $(REMOVE) $(TARGET).elf
+ $(REMOVE) $(TARGET).map
+ $(REMOVE) $(TARGET).obj
+ $(REMOVE) $(TARGET).a90
+ $(REMOVE) $(TARGET).sym
+ $(REMOVE) $(TARGET).lnk
+ $(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
+
diff --git a/poc/avr_sdcard/fat.c b/poc/avr_sdcard/fat.c
new file mode 100644
index 0000000..22e38ed
--- /dev/null
+++ b/poc/avr_sdcard/fat.c
@@ -0,0 +1,316 @@
+/*#######################################################################################
+FAT for AVR (MMC/SD)
+
+Copyright (C) 2004 Ulrich Radig
+
+Bei Fragen und Verbesserungen wendet euch per EMail an
+
+mail@ulrichradig.de
+
+oder im Forum meiner Web Page : www.ulrichradig.de
+
+
+Dieses Programm ist freie Software. Sie können es unter den Bedingungen der
+GNU General Public License, wie von der Free Software Foundation veröffentlicht,
+weitergeben und/oder modifizieren, entweder gemäß Version 2 der Lizenz oder
+(nach Ihrer Option) jeder späteren Version.
+
+Die Veröffentlichung dieses Programms erfolgt in der Hoffnung,
+daß es Ihnen von Nutzen sein wird, aber OHNE IRGENDEINE GARANTIE,
+sogar ohne die implizite Garantie der MARKTREIFE oder der VERWENDBARKEIT
+FÜR EINEN BESTIMMTEN ZWECK. Details finden Sie in der GNU General Public License.
+
+Sie sollten eine Kopie der GNU General Public License zusammen mit diesem
+Programm erhalten haben.
+Falls nicht, schreiben Sie an die Free Software Foundation,
+Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+#######################################################################################*/
+
+#include "fat.h"
+
+unsigned char cluster_size;
+unsigned int fat_offset;
+unsigned int cluster_offset;
+unsigned int volume_boot_record_addr;
+
+//############################################################################
+//Auslesen Cluster Size der MMC/SD Karte und Speichern der größe ins EEprom
+//Auslesen Cluster Offset der MMC/SD Karte und Speichern der größe ins EEprom
+void fat_init (uint8_t *Buffer)
+//############################################################################
+{
+ struct BootSec *bootp; //Zeiger auf Bootsektor Struktur
+
+// unsigned char Buffer[BlockSize];
+
+ //volume_boot_record_addr = fat_addr (Buffer);
+ mmc_read_sector (MASTER_BOOT_RECORD,Buffer); //Read Master Boot Record
+ if (Buffer[510] == 0x55 && Buffer[511] == 0xAA)
+ {
+ FAT_DEBUG("MBR Signatur found!\r\n");
+ }
+ else
+ {
+ FAT_DEBUG("MBR Signatur not found!\r\n");
+ while(1);
+ }
+
+
+ volume_boot_record_addr = Buffer[VBR_ADDR] + (Buffer[VBR_ADDR+1] << 8);
+
+ mmc_read_sector (volume_boot_record_addr,Buffer);
+ if (Buffer[510] == 0x55 && Buffer[511] == 0xAA)
+ {
+ FAT_DEBUG("VBR Signatur found!\r\n");
+ }
+ else
+ {
+ FAT_DEBUG("VBR Signatur not found!\r\n");
+ volume_boot_record_addr = MASTER_BOOT_RECORD;//<- added by Hennie
+ mmc_read_sector (MASTER_BOOT_RECORD,Buffer); //Read Master Boot Record
+ }
+
+ bootp=(struct BootSec *)Buffer;
+ cluster_size = bootp->BPB_SecPerClus;
+ fat_offset = bootp->BPB_RsvdSecCnt;
+
+ cluster_offset = ((bootp->BPB_BytesPerSec * 32)/BlockSize);
+ cluster_offset += fat_root_dir_addr(Buffer);
+}
+
+//############################################################################
+//Auslesen der Adresse des First Root Directory von Volume Boot Record
+unsigned int fat_root_dir_addr (unsigned char *Buffer)
+//############################################################################
+{
+ struct BootSec *bootp; //Zeiger auf Bootsektor Struktur
+ unsigned int FirstRootDirSecNum;
+ //auslesen des Volume Boot Record von der MMC/SD Karte
+ mmc_read_sector (volume_boot_record_addr,Buffer);
+ bootp=(struct BootSec *)Buffer;
+
+ //berechnet den ersten Sector des Root Directory
+ FirstRootDirSecNum = ( bootp->BPB_RsvdSecCnt +
+ (bootp->BPB_NumFATs * bootp->BPB_FATSz16));
+
+ FirstRootDirSecNum+= volume_boot_record_addr;
+
+ return(FirstRootDirSecNum);
+}
+
+//############################################################################
+// Ausgabe des angegebenen Directory Eintrag in Entry_Count
+// ist kein Eintrag vorhanden, ist der Eintrag im
+// Rückgabe Cluster 0xFFFF. Es wird immer nur ein Eintrag ausgegeben
+// um Speicherplatz zu sparen um es auch für kleine Atmels zu benutzen
+unsigned int fat_read_dir_ent (unsigned int dir_cluster, //Angabe Dir Cluster
+ unsigned char Entry_Count, //Angabe welcher Direintrag
+ unsigned long *Size, //Rückgabe der File Größe
+ unsigned char *Dir_Attrib, //Rückgabe des Dir Attributs
+ unsigned char *Buffer) //Working Buffer
+//############################################################################
+{
+ unsigned char *pointer;
+ unsigned int TMP_Entry_Count = 0;
+ unsigned long Block = 0;
+ struct DirEntry *dir; //Zeiger auf einen Verzeichniseintrag
+
+ pointer = Buffer;
+
+ if (dir_cluster == 0)
+ {
+ Block = fat_root_dir_addr(Buffer);
+ }
+ else
+ {
+ //Berechnung des Blocks aus BlockCount und Cluster aus FATTabelle
+ //Berechnung welcher Cluster zu laden ist
+ //Auslesen der FAT - Tabelle
+ fat_load (dir_cluster,&Block,Buffer);
+ Block = ((Block-2) * cluster_size) + cluster_offset;
+ }
+
+ //auslesen des gesamten Root Directory
+ for (unsigned int blk = Block;;blk++)
+ {
+ mmc_read_sector (blk,Buffer); //Lesen eines Blocks des Root Directory
+ for (unsigned int a=0;aDIR_Name[0] == 0) //Kein weiterer Eintrag wenn erstes Zeichen des Namens 0 ist
+ {
+ return (0xFFFF);
+ }
+
+ //Prüfen ob es ein 8.3 Eintrag ist
+ //Das ist der Fall wenn es sich nicht um einen Eintrag für lange Dateinamen
+ //oder um einen als gelöscht markierten Eintrag handelt.
+ if ((dir->DIR_Attr != ATTR_LONG_NAME) &&
+ (dir->DIR_Name[0] != DIR_ENTRY_IS_FREE))
+ {
+ //Ist es der gewünschte Verzeichniseintrag
+ if (TMP_Entry_Count == Entry_Count)
+ {
+ //Speichern des Verzeichnis Eintrages in den Rückgabe Buffer
+ for(unsigned char b=0;b<11;b++)
+ {
+ if (dir->DIR_Name[b] != SPACE)
+ {
+ if (b == 8)
+ {
+ *pointer++= '.';
+ }
+ *pointer++=dir->DIR_Name[b];
+ }
+ }
+ *pointer++='\0';
+ *Dir_Attrib = dir->DIR_Attr;
+
+ //Speichern der Filegröße
+ *Size=dir->DIR_FileSize;
+
+ //Speichern des Clusters des Verzeichniseintrages
+ dir_cluster = dir->DIR_FstClusLO;
+
+ //Eintrag gefunden Rücksprung mit Cluster File Start
+ return(dir_cluster);
+ }
+ TMP_Entry_Count++;
+ }
+ }
+ }
+ return (0xFFFF); //Kein Eintrag mehr gefunden Rücksprung mit 0xFFFF
+}
+
+//############################################################################
+// Auslesen der Cluster für ein File aus der FAT
+// in den Buffer(512Byte). Bei einer 128MB MMC/SD
+// Karte ist die Cluster größe normalerweise 16KB groß
+// das bedeutet das File kann max. 4MByte groß sein.
+// Bei größeren Files muß der Buffer größer definiert
+// werden! (Ready)
+// Cluster = Start Clusterangabe aus dem Directory
+void fat_load ( unsigned int Cluster, //Angabe Startcluster
+ unsigned long *Block,
+ unsigned char *TMP_Buffer) //Workingbuffer
+//############################################################################
+{
+ //Zum Überprüfen ob der FAT Block schon geladen wurde
+ unsigned int FAT_Block_Store = 0;
+
+ //Byte Adresse innerhalb des Fat Blocks
+ unsigned int FAT_Byte_Addresse;
+
+ //FAT Block Adresse
+ unsigned int FAT_Block_Addresse;
+
+ //Berechnung für den ersten FAT Block (FAT Start Addresse)
+ for (unsigned int a = 0;;a++)
+ {
+ if (a == *Block)
+ {
+ *Block = (0x0000FFFF & Cluster);
+ return;
+ }
+
+ if (Cluster == 0xFFFF)
+ {
+ break; //Ist das Ende des Files erreicht Schleife beenden
+ }
+ //Berechnung des Bytes innerhalb des FAT Block´s
+ FAT_Byte_Addresse = (Cluster*2) % BlockSize;
+
+ //Berechnung des Blocks der gelesen werden muß
+ FAT_Block_Addresse = ((Cluster*2) / BlockSize) +
+ volume_boot_record_addr + fat_offset;
+ //Lesen des FAT Blocks
+ //Überprüfung ob dieser Block schon gelesen wurde
+ if (FAT_Block_Addresse != FAT_Block_Store)
+ {
+ FAT_Block_Store = FAT_Block_Addresse;
+ //Lesen des FAT Blocks
+ mmc_read_sector (FAT_Block_Addresse,TMP_Buffer);
+ }
+
+ //Lesen der nächsten Clusternummer
+ Cluster = (TMP_Buffer[FAT_Byte_Addresse + 1] << 8) +
+ TMP_Buffer[FAT_Byte_Addresse];
+ }
+ return;
+}
+
+//############################################################################
+//Lesen eines 512Bytes Blocks von einem File
+void fat_read_file (unsigned int Cluster,//Angabe des Startclusters vom File
+ unsigned char *Buffer, //Workingbuffer
+ unsigned long BlockCount) //Angabe welcher Bock vom File geladen
+ //werden soll a 512 Bytes
+//############################################################################
+{
+ //Berechnung des Blocks aus BlockCount und Cluster aus FATTabelle
+ //Berechnung welcher Cluster zu laden ist
+
+ unsigned long Block = (BlockCount/cluster_size);
+
+ //Auslesen der FAT - Tabelle
+ fat_load (Cluster,&Block,Buffer);
+ Block = ((Block-2) * cluster_size) + cluster_offset;
+ //Berechnung des Blocks innerhalb des Cluster
+ Block += (BlockCount % cluster_size);
+ //Read Data Block from Device
+ mmc_read_sector (Block,Buffer);
+ return;
+}
+
+//############################################################################
+//Lesen eines 512Bytes Blocks von einem File
+void fat_write_file (unsigned int cluster,//Angabe des Startclusters vom File
+ unsigned char *buffer, //Workingbuffer
+ unsigned long blockCount) //Angabe welcher Bock vom File gespeichert
+ //werden soll a 512 Bytes
+//############################################################################
+{
+ //Berechnung des Blocks aus BlockCount und Cluster aus FATTabelle
+ //Berechnung welcher Cluster zu speichern ist
+ unsigned char tmp_buffer[513];
+ unsigned long block = (blockCount/cluster_size);
+
+ //Auslesen der FAT - Tabelle
+ fat_load (cluster,&block,tmp_buffer);
+ block = ((block-2) * cluster_size) + cluster_offset;
+ //Berechnung des Blocks innerhalb des Cluster
+ block += (blockCount % cluster_size);
+ //Write Data Block to Device
+ mmc_write_sector (block,buffer);
+ return;
+}
+
+//####################################################################################
+//Sucht ein File im Directory
+unsigned char fat_search_file (unsigned char *File_Name, //Name des zu suchenden Files
+ unsigned int *Cluster, //Angabe Dir Cluster welches
+ //durchsucht werden soll
+ //und Rückgabe des clusters
+ //vom File welches gefunden
+ //wurde
+ unsigned long *Size, //Rückgabe der File Größe
+ unsigned char *Dir_Attrib,//Rückgabe des Dir Attributs
+ unsigned char *Buffer) //Working Buffer
+//####################################################################################
+{
+ unsigned int Dir_Cluster_Store = *Cluster;
+ for (unsigned char a = 0;a < 100;a++)
+ {
+ *Cluster = fat_read_dir_ent(Dir_Cluster_Store,a,Size,Dir_Attrib,Buffer);
+ if (*Cluster == 0xffff)
+ {
+ return(0); //File not Found
+ }
+ if(strcasecmp((char *)File_Name,(char *)Buffer) == 0)
+ {
+ return(1); //File Found
+ }
+ }
+ return(2); //Error
+}
diff --git a/poc/avr_sdcard/fat.h b/poc/avr_sdcard/fat.h
new file mode 100644
index 0000000..198809e
--- /dev/null
+++ b/poc/avr_sdcard/fat.h
@@ -0,0 +1,109 @@
+/*#######################################################################################
+Connect ARM to MMC/SD
+
+Copyright (C) 2004 Ulrich Radig
+#######################################################################################*/
+
+#ifndef _FAT_H_
+ #define _FAT_H_
+
+#include
+#include "mmc.h"
+#include "uart.h"
+
+#define FAT_DEBUG uart_puts
+//#define FAT_DEBUG(...)
+
+
+//Prototypes
+extern unsigned int fat_root_dir_addr (unsigned char *);
+extern unsigned int fat_read_dir_ent (unsigned int,unsigned char,unsigned long*,unsigned char *,unsigned char *);
+extern void fat_load (unsigned int,unsigned long *,unsigned char *);
+extern void fat_read_file (unsigned int,unsigned char *,unsigned long);
+extern void fat_write_file (unsigned int,unsigned char *,unsigned long);
+extern void fat_init (uint8_t *Buffer);
+extern unsigned char fat_search_file (unsigned char *,unsigned int *,unsigned long *,unsigned char *,unsigned char *);
+
+//Block Size in Bytes
+#define BlockSize 512
+
+//Master Boot Record
+#define MASTER_BOOT_RECORD 0
+
+//Volume Boot Record location in Master Boot Record
+#define VBR_ADDR 0x1C6
+
+//define ASCII
+#define SPACE 0x20
+#define DIR_ENTRY_IS_FREE 0xE5
+#define FIRST_LONG_ENTRY 0x01
+#define SECOND_LONG_ENTRY 0x42
+
+//define DIR_Attr
+#define ATTR_LONG_NAME 0x0F
+#define ATTR_READ_ONLY 0x01
+#define ATTR_HIDDEN 0x02
+#define ATTR_SYSTEM 0x04
+#define ATTR_VOLUME_ID 0x08
+#define ATTR_DIRECTORY 0x10
+#define ATTR_ARCHIVE 0x20
+
+struct BootSec
+{
+ unsigned char BS_jmpBoot[3];
+ unsigned char BS_OEMName[8];
+ unsigned int BPB_BytesPerSec; //2 bytes
+ unsigned char BPB_SecPerClus;
+ unsigned int BPB_RsvdSecCnt; //2 bytes
+ unsigned char BPB_NumFATs;
+ unsigned int BPB_RootEntCnt; //2 bytes
+ unsigned int BPB_TotSec16; //2 bytes
+ unsigned char BPB_Media;
+ unsigned int BPB_FATSz16; //2 bytes
+ unsigned int BPB_SecPerTrk; //2 bytes
+ unsigned int BPB_NumHeads; //2 bytes
+ unsigned long BPB_HiddSec; //4 bytes
+ unsigned long BPB_TotSec32; //4 bytes
+};
+
+//FAT12 and FAT16 Structure Starting at Offset 36
+#define BS_DRVNUM 36
+#define BS_RESERVED1 37
+#define BS_BOOTSIG 38
+#define BS_VOLID 39
+#define BS_VOLLAB 43
+#define BS_FILSYSTYPE 54
+
+//FAT32 Structure Starting at Offset 36
+#define BPB_FATSZ32 36
+#define BPB_EXTFLAGS 40
+#define BPB_FSVER 42
+#define BPB_ROOTCLUS 44
+#define BPB_FSINFO 48
+#define BPB_BKBOOTSEC 50
+#define BPB_RESERVED 52
+
+#define FAT32_BS_DRVNUM 64
+#define FAT32_BS_RESERVED1 65
+#define FAT32_BS_BOOTSIG 66
+#define FAT32_BS_VOLID 67
+#define FAT32_BS_VOLLAB 71
+#define FAT32_BS_FILSYSTYPE 82
+//End of Boot Sctor and BPB Structure
+
+struct DirEntry {
+ unsigned char DIR_Name[11]; //8 chars filename
+ unsigned char DIR_Attr; //file attributes RSHA, Longname, Drive Label, Directory
+ unsigned char DIR_NTRes; //set to zero
+ unsigned char DIR_CrtTimeTenth; //creation time part in milliseconds
+ unsigned int DIR_CrtTime; //creation time
+ unsigned int DIR_CrtDate; //creation date
+ unsigned int DIR_LastAccDate; //last access date
+ unsigned int DIR_FstClusHI; //first cluster high word
+ unsigned int DIR_WrtTime; //last write time
+ unsigned int DIR_WrtDate; //last write date
+ unsigned int DIR_FstClusLO; //first cluster low word
+ unsigned long DIR_FileSize;
+ };
+
+#endif //_FAT_H_
diff --git a/poc/avr_sdcard/main.c b/poc/avr_sdcard/main.c
new file mode 100644
index 0000000..c3b5284
--- /dev/null
+++ b/poc/avr_sdcard/main.c
@@ -0,0 +1,238 @@
+#define F_CPU 8000000
+
+#include
+#include
+#include
+
+#include "uart.h"
+#include "mmc.h"
+#include "fat.h"
+
+//SREG defines
+#define S_MOSI PB3
+#define S_MISO PB4
+#define S_SCK PB5
+#define S_LATCH PB2
+
+//DEBUG defines
+#define D_LED0 PC5
+
+//SRAM defines
+#define R_WR PB6
+#define R_RD PB7
+#define R_DATA PORTD
+#define R_DIR DDRD
+
+
+#define DEBUG_BUFFER_SIZE 128
+#define READ_BUFFER_SIZE 512
+
+uint8_t debug_buffer[DEBUG_BUFFER_SIZE];
+uint8_t read_buffer[READ_BUFFER_SIZE];
+
+void dprintf(const uint8_t * fmt, ...) {
+
+ va_list args;
+ va_start(args, fmt);
+ vsprintf(debug_buffer, fmt, args);
+ va_end(args);
+ uart_puts(debug_buffer);
+}
+
+
+void dump_packet(uint32_t addr,uint32_t len,uint8_t *packet){
+ uint16_t i,j;
+ uint16_t sum =0;
+ for (i=0;i=33 && packet[i+j]<=126 )
+ dprintf("%c", packet[i+j]);
+ else
+ dprintf(".");
+ }
+ dprintf("|\n");
+ }
+}
+
+
+void spi_init(void)
+{
+ /* Set MOSI and SCK output, all others input */
+ DDRB |= ((1<>16));
+ spi_master_transmit((uint8_t)(addr>>8));
+ spi_master_transmit((uint8_t)(addr>>0));
+
+ PORTB |= (1<>16));
+ spi_master_transmit((uint8_t)(addr>>8));
+ spi_master_transmit((uint8_t)(addr>>0));
+
+ PORTB |= (1<
+
+//############################################################################
+//Routine zur Initialisierung der MMC/SD-Karte (SPI-MODE)
+unsigned char mmc_init ()
+//############################################################################
+{
+ unsigned int Timeout = 0,i;
+
+ //Konfiguration des Ports an der die MMC/SD-Karte angeschlossen wurde
+ DDRC |= ( (1< 20)
+ {
+ MMC_Disable();
+ return(1); //Abbruch bei Commando1 (Return Code1)
+ }
+ }
+
+ //Sendet Commando CMD1 an MMC/SD-Karte
+ Timeout = 0;
+
+ CMD[0] = 0x41;//Commando 1
+ CMD[5] = 0xFF;
+
+ while( mmc_write_command (CMD) !=0)
+ {
+ if (Timeout++ > 800)
+ {
+ MMC_Disable();
+ return(9); //Abbruch bei Commando2 (Return Code2)
+ }
+ }
+ return(0);
+}
+
+//############################################################################
+//Sendet ein Commando an die MMC/SD-Karte
+unsigned char mmc_write_command (unsigned char *cmd)
+//############################################################################
+{
+ unsigned char tmp = 0xff;
+ unsigned int Timeout = 0;
+
+
+ //sendet 6 Byte Commando
+ for (unsigned char a = 0;a<0x06;a++) //sendet 6 Byte Commando zur MMC/SD-Karte
+ {
+ mmc_write_byte(*cmd++);
+ }
+
+ //Wartet auf ein gültige Antwort von der MMC/SD-Karte
+ while (tmp == 0xff)
+ {
+ tmp = mmc_read_byte();
+
+ if (Timeout++ > 50)
+ {
+ break; //Abbruch da die MMC/SD-Karte nicht Antwortet
+ }
+ }
+ return(tmp);
+}
+
+//############################################################################
+//Routine zum Empfangen eines Bytes von der MMC-Karte
+unsigned char mmc_read_byte (void)
+//############################################################################
+{
+ uint8_t Byte=0,j;
+
+ for(j=0; j<8; j++){
+ Byte = (Byte<<1);
+
+ PORTC |= (1<>24 );
+ cmd[2] = ((addr & 0x00FF0000) >>16 );
+ cmd[3] = ((addr & 0x0000FF00) >>8 );
+
+ //Sendet Commando cmd24 an MMC/SD-Karte (Write 1 Block/512 Bytes)
+ tmp = mmc_write_command (cmd);
+ if (tmp != 0)
+ {
+ return(tmp);
+ }
+
+ //Wartet einen Moment und sendet einen Clock an die MMC/SD-Karte
+ for (unsigned char a=0;a<100;a++)
+ {
+ mmc_read_byte();
+ }
+
+ //Sendet Start Byte an MMC/SD-Karte
+ mmc_write_byte(0xFE);
+
+ //Schreiben des Bolcks (512Bytes) auf MMC/SD-Karte
+ for (unsigned int a=0;a<512;a++)
+ {
+ mmc_write_byte(*Buffer++);
+ }
+
+ //CRC-Byte schreiben
+ mmc_write_byte(0xFF); //Schreibt Dummy CRC
+ mmc_write_byte(0xFF); //CRC Code wird nicht benutzt
+
+ //Fehler beim schreiben? (Data Response XXX00101 = OK)
+ if((mmc_read_byte()&0x1F) != 0x05) return(1);
+
+ //Wartet auf MMC/SD-Karte Bussy
+ while (mmc_read_byte() != 0xff){};
+
+
+return(0);
+}
+
+//############################################################################
+//Routine zum lesen des CID Registers von der MMC/SD-Karte (16Bytes)
+void mmc_read_block(unsigned char *cmd,unsigned char *Buffer,unsigned int Bytes)
+//############################################################################
+{
+ //Sendet Commando cmd an MMC/SD-Karte
+ if (mmc_write_command (cmd) != 0)
+ {
+ return;
+ }
+
+ //Wartet auf Start Byte von der MMC/SD-Karte (FEh/Start Byte)
+
+ while (mmc_read_byte() != 0xfe){};
+
+ //Lesen des Bolcks (normal 512Bytes) von MMC/SD-Karte
+ for (unsigned int a=0;a>24 );
+ cmd[2] = ((addr & 0x00FF0000) >>16 );
+ cmd[3] = ((addr & 0x0000FF00) >>8 );
+
+ mmc_read_block(cmd,Buffer,512);
+
+ return(0);
+}
+
+//############################################################################
+//Routine zum lesen des CID Registers von der MMC/SD-Karte (16Bytes)
+unsigned char mmc_read_cid (unsigned char *Buffer)
+//############################################################################
+{
+ //Commando zum lesen des CID Registers
+ unsigned char cmd[] = {0x4A,0x00,0x00,0x00,0x00,0xFF};
+
+ mmc_read_block(cmd,Buffer,16);
+
+ return(0);
+}
+
+//############################################################################
+//Routine zum lesen des CSD Registers von der MMC/SD-Karte (16Bytes)
+unsigned char mmc_read_csd (unsigned char *Buffer)
+//############################################################################
+{
+ //Commando zum lesen des CSD Registers
+ unsigned char cmd[] = {0x49,0x00,0x00,0x00,0x00,0xFF};
+
+ mmc_read_block(cmd,Buffer,16);
+ return(0);
+}
diff --git a/poc/avr_sdcard/mmc.h b/poc/avr_sdcard/mmc.h
new file mode 100644
index 0000000..2a251a0
--- /dev/null
+++ b/poc/avr_sdcard/mmc.h
@@ -0,0 +1,57 @@
+/*#######################################################################################
+Connect ARM to MMC/SD
+
+Copyright (C) 2004 Ulrich Radig
+#######################################################################################*/
+
+#ifndef _MMC_H_
+ #define _MMC_H_
+
+#include
+
+//#define SPI_Mode 1 //1 = Hardware SPI | 0 = Software SPI
+#define SPI_Mode 0
+
+#define MMC_Write PORTC //Port an der die MMC/SD-Karte angeschlossen ist also des SPI
+#define MMC_Read PINC
+#define MMC_Direction_REG DDRC
+
+#if defined (__AVR_ATmega8__)
+#define MMC_CS PC0
+#define MMC_DO PC1
+#define MMC_DI PC2
+#define MMC_CLK PC3
+ #define SPI_SS 4 //Nicht Benutz muß aber definiert werden
+#endif
+
+
+//Prototypes
+extern unsigned char mmc_read_byte(void);
+
+extern void mmc_write_byte(unsigned char);
+
+extern void mmc_read_block(unsigned char *,unsigned char *,unsigned in);
+
+extern unsigned char mmc_init(void);
+
+extern unsigned char mmc_read_sector (unsigned long,unsigned char *);
+
+extern unsigned char mmc_write_sector (unsigned long,unsigned char *);
+
+extern unsigned char mmc_write_command (unsigned char *);
+
+extern unsigned char mmc_read_csd (unsigned char *);
+
+extern unsigned char mmc_read_cid (unsigned char *);
+
+//set MMC_Chip_Select to high (MMC/SD-Karte Inaktiv)
+#define MMC_Disable() MMC_Write|= (1<
+#include
+
+#ifndef SIGNAL
+#include
+#endif // SIGNAL
+
+#include "uart.h"
+
+// Folgende Zeile einkommentieren, falls FIFO verwendet werden soll
+// #include "fifo.h"
+
+#define BAUDRATE 38400
+#define F_CPU 8000000
+
+#define nop() __asm volatile ("nop")
+
+#ifdef SUART_TXD
+ #define SUART_TXD_PORT PORTB
+ #define SUART_TXD_DDR DDRB
+ #define SUART_TXD_BIT PB1
+ static volatile uint16_t outframe;
+#endif // SUART_TXD
+
+#ifdef SUART_RXD
+ #define SUART_RXD_PORT PORTB
+ #define SUART_RXD_PIN PINB
+ #define SUART_RXD_DDR DDRB
+ #define SUART_RXD_BIT PB0
+ static volatile uint16_t inframe;
+ static volatile uint8_t inbits, received;
+
+ #ifdef _FIFO_H_
+ #define INBUF_SIZE 4
+ static uint8_t inbuf[INBUF_SIZE];
+ fifo_t infifo;
+ #else // _FIFO_H_
+ static volatile uint8_t indata;
+ #endif // _FIFO_H_
+#endif // SUART_RXD
+
+
+// Initialisierung für einen ATmega8
+// Für andere AVR-Derivate sieht dies vermutlich anders aus:
+// Registernamen ändern sich (zB TIMSK0 anstatt TIMSK, etc).
+void uart_init()
+{
+ uint8_t tifr = 0;
+ uint8_t sreg = SREG;
+ cli();
+
+ // Mode #4 für Timer1
+ // und volle MCU clock
+ // IC Noise Cancel
+ // IC on Falling Edge
+ TCCR1A = 0;
+ TCCR1B = (1 << WGM12) | (1 << CS10) | (0 << ICES1) | (1 << ICNC1);
+
+ // OutputCompare für gewünschte Timer1 Frequenz
+ OCR1A = (uint16_t) ((uint32_t) F_CPU/BAUDRATE);
+
+#ifdef SUART_RXD
+ SUART_RXD_DDR &= ~(1 << SUART_RXD_BIT);
+ SUART_RXD_PORT |= (1 << SUART_RXD_BIT);
+ TIMSK |= (1 << TICIE1);
+ tifr |= (1 << ICF1) | (1 << OCF1B);
+#else
+ TIMSK &= ~(1 << TICIE1);
+#endif // SUART_RXD
+
+#ifdef SUART_TXD
+ tifr |= (1 << OCF1A);
+ SUART_TXD_PORT |= (1 << SUART_TXD_BIT);
+ SUART_TXD_DDR |= (1 << SUART_TXD_BIT);
+ outframe = 0;
+#endif // SUART_TXD
+
+ TIFR = tifr;
+
+ SREG = sreg;
+}
+
+
+#ifdef SUART_TXD
+void uart_putc (uint8_t c)
+{
+ do
+ {
+ sei(); nop(); cli(); // yield();
+ } while (outframe);
+
+ // frame = *.P.7.6.5.4.3.2.1.0.S S=Start(0), P=Stop(1), *=Endemarke(1)
+ outframe = (3 << 9) | (((uint8_t) c) << 1);
+
+ TIMSK |= (1 << OCIE1A);
+ TIFR = (1 << OCF1A);
+
+ sei();
+}
+
+void uart_puts (uint8_t *buf)
+{
+ while( *buf )
+ uart_putc ( *buf++ );
+
+}
+#endif // SUART_TXD
+
+
+#ifdef SUART_TXD
+SIGNAL (SIG_OUTPUT_COMPARE1A)
+{
+ uint16_t data = outframe;
+
+ if (data & 1) SUART_TXD_PORT |= (1 << SUART_TXD_BIT);
+ else SUART_TXD_PORT &= ~(1 << SUART_TXD_BIT);
+
+ if (1 == data)
+ {
+ TIMSK &= ~(1 << OCIE1A);
+ }
+
+ outframe = data >> 1;
+}
+#endif // SUART_TXD
+
+
+
+#ifdef SUART_RXD
+SIGNAL (SIG_INPUT_CAPTURE1)
+{
+ uint16_t icr1 = ICR1;
+ uint16_t ocr1a = OCR1A;
+
+ // Eine halbe Bitzeit zu ICR1 addieren (modulo OCR1A) und nach OCR1B
+ uint16_t ocr1b = icr1 + ocr1a/2;
+ if (ocr1b >= ocr1a)
+ ocr1b -= ocr1a;
+ OCR1B = ocr1b;
+
+ TIFR = (1 << OCF1B);
+ TIMSK = (TIMSK & ~(1 << TICIE1)) | (1 << OCIE1B);
+ inframe = 0;
+ inbits = 0;
+}
+#endif // SUART_RXD
+
+
+
+
+#ifdef SUART_RXD
+SIGNAL (SIG_OUTPUT_COMPARE1B)
+{
+ uint16_t data = inframe >> 1;
+
+ if (SUART_RXD_PIN & (1 << SUART_RXD_BIT))
+ data |= (1 << 9);
+
+ uint8_t bits = inbits+1;
+
+ if (10 == bits)
+ {
+ if ((data & 1) == 0)
+ if (data >= (1 << 9))
+ {
+#ifdef _FIFO_H_
+ _inline_fifo_put (&infifo, data >> 1);
+#else
+ indata = data >> 1;
+#endif // _FIFO_H_
+ received = 1;
+ }
+
+ TIMSK = (TIMSK & ~(1 << OCIE1B)) | (1 << TICIE1);
+ TIFR = (1 << ICF1);
+ }
+ else
+ {
+ inbits = bits;
+ inframe = data;
+ }
+}
+#endif // SUART_RXD
+
+
+
+#ifdef SUART_RXD
+#ifdef _FIFO_H_
+
+uint8_t uart_getc_wait()
+{
+ return (int) fifo_get_wait (&infifo);
+}
+
+int uart_getc_nowait()
+{
+ return fifo_get_nowait (&infifo);
+}
+
+#else // _FIFO_H_
+
+uint8_t uart_getc_wait()
+{
+ while (!received) {}
+ received = 0;
+
+ return (uint8_t) indata;
+}
+
+uint8_t uart_getc_nowait()
+{
+ if (received)
+ {
+ received = 0;
+ return (uint8_t) indata;
+ }
+
+ return -1;
+}
+
+#endif // _FIFO_H_
+#endif // SUART_RXD
+
diff --git a/poc/avr_sdcard/uart.h b/poc/avr_sdcard/uart.h
new file mode 100644
index 0000000..8fa2209
--- /dev/null
+++ b/poc/avr_sdcard/uart.h
@@ -0,0 +1,23 @@
+#ifndef _UART_H_
+#define _UART_H_
+
+#define SUART_TXD
+#define SUART_RXD
+
+#include
+#include
+
+void uart_init();
+
+#ifdef SUART_TXD
+ void uart_putc(uint8_t byte);
+ void uart_puts(uint8_t *buf);
+#endif // SUART_RXD
+
+#ifdef SUART_RXD
+ uint8_t uart_getc_wait();
+ uint8_t uart_getc_nowait();
+#endif // SUART_RXD
+
+#endif /* _UART_H_ */
+
diff --git a/poc/poc_mmc/Makefile b/poc/poc_mmc/Makefile
index 93ef1eb..2eedcb5 100644
--- a/poc/poc_mmc/Makefile
+++ b/poc/poc_mmc/Makefile
@@ -212,6 +212,13 @@ AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
#
+#flashmac:
+# uisp -dprog=avr910 -dpart=ATmega8 -dserial=/dev/cu.PL2303-00002326 --erase -v --upload if=$(TARGET).hex
+
+
+
+
+
# ---------------------------------------------------------------------------
# Define directories, if needed.