o add sram test with sreg

poc/poc_sreg/Makefile

@@ -0,0 +1,446 @@
+# 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 = 1000000
+
+# 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 = $(TARGET).c uart.c 
+
+
+# List Assembler source files here.
+# Make them always end in a capital .S.  Files ending in a lowercase .s
+# will not be considered source files but generated files (assembler
+# output from the compiler), and will be deleted upon "make clean"!
+# Even though the DOS/Win* filesystem matches both .s and .S the same,
+# it will preserve the spelling of the filenames, and gcc itself does
+# care about how the name is spelled on its command-line.
+ASRC = 
+
+
+
+# Optimization level, can be [0, 1, 2, 3, s]. 
+# 0 = turn off optimization. s = optimize for size.
+# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
+OPT = s
+
+# Debugging format.
+# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
+# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
+#DEBUG = stabs
+#DEBUG = dwarf-2
+
+# List any extra directories to look for include files here.
+#     Each directory must be seperated by a space.
+EXTRAINCDIRS = 
+
+
+# Compiler flag to set the C Standard level.
+# c89   - "ANSI" C
+# gnu89 - c89 plus GCC extensions
+# c99   - ISO C99 standard (not yet fully implemented)
+# gnu99 - c99 plus GCC extensions
+CSTANDARD = -std=gnu99
+
+# Place -D or -U options here
+CDEFS =
+
+# Place -I options here
+CINCS =
+
+
+# Compiler flags.
+#  -g*:          generate debugging information
+#  -O*:          optimization level
+#  -f...:        tuning, see GCC manual and avr-libc documentation
+#  -Wall...:     warning level
+#  -Wa,...:      tell GCC to pass this to the assembler.
+#    -adhlns...: create assembler listing
+CFLAGS = -g$(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=16000000UL   
+#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) $(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 <http://savannah.nongnu.org/projects/avrdude> 
+# 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 
+#
+
+
+# ---------------------------------------------------------------------------
+
+# 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
+

poc/poc_sreg/main.c

@@ -0,0 +1,159 @@
+#include <avr/io.h>
+#define F_CPU 8000000
+#include <util/delay.h>
+#include <stdlib.h>
+
+#include "uart.h"
+
+//SREG defines
+#define S_MOSI 	PB3
+#define S_SCK  	PB5
+#define S_LATCH	PB2
+
+//DEBUG defines
+#define D_LED0	PB0
+
+//SRAM defines
+#define R_WR	PB1
+#define R_RD	PB7
+#define R_DATA	PORTD
+#define R_DIR	DDRD
+
+
+//Software UART defines
+//	SUART_RX PB6
+
+
+void SPI_MasterInit(void)
+{
+	/* Set MOSI and SCK output, all others input */
+	DDRB |= ((1<<S_MOSI) | (1<<S_SCK) | (1<<S_LATCH) );
+
+	/* Enable SPI, Master, set clock rate fck */
+	SPCR = ((1<<SPE)|(1<<MSTR));
+}
+
+void SPI_MasterTransmit(unsigned char cData)
+{
+	/* Start transmission */
+	SPDR = cData;
+	
+	/* Wait for transmission complete */
+	while(!(SPSR & (1<<SPIF)));
+}
+
+uint8_t SRAM_Read(uint32_t addr)
+{
+	uint8_t byte;
+
+	DDRD=0x00;
+	PORTD=0x00;
+	
+	PORTB |= (1<<R_RD);
+	PORTB |= (1<<R_WR);
+
+
+	SPI_MasterTransmit((uint8_t)(addr>>8));	
+	SPI_MasterTransmit((uint8_t)(addr>>4));
+	SPI_MasterTransmit((uint8_t)(addr>>0));
+
+	PORTB |= (1<<S_LATCH);  
+    	PORTB &= ~(1<<S_LATCH);
+
+	PORTB &= ~(1<<R_RD);
+
+	asm volatile ("nop");
+	asm volatile ("nop");
+	
+	byte = PIND;
+	
+	PORTB |= (1<<R_RD);
+
+	return byte;
+}
+
+void SRAM_Write(uint32_t addr, uint8_t data)
+{
+	DDRD=0xff;
+
+	PORTB |= (1<<R_RD);
+	PORTB |= (1<<R_WR);
+
+	SPI_MasterTransmit((uint8_t)(addr>>8));	
+	SPI_MasterTransmit((uint8_t)(addr>>4));
+	SPI_MasterTransmit((uint8_t)(addr>>0));
+
+	PORTB |= (1<<S_LATCH);  
+    	PORTB &= ~(1<<S_LATCH);
+
+	PORTB &= ~(1<<R_WR);
+	
+	PORTD=data;
+
+	PORTB |= (1<<R_WR);
+}
+
+
+
+int main(void)
+{
+
+	uint8_t read, buf[2], i;
+	DDRB |= ((1<<D_LED0) | (1<<R_WR) | (1<<R_RD));    	
+	PORTB |= (1<<R_RD);
+	PORTB |= (1<<R_WR);
+
+	SPI_MasterInit();
+
+	uart_init();
+
+
+
+	SRAM_Write(0x00000000,0x23);
+	SRAM_Write(0x00000001, 0x42);
+
+	while(1){
+		i++;
+
+		PORTB ^= ((1<<D_LED0));
+
+		read = SRAM_Read(0x00000000);
+		itoa(read,buf,16);
+		uart_puts("dump: ");
+		uart_puts(buf);
+		uart_putc(0x20);
+
+		read = SRAM_Read(0x00000001);
+		itoa(read,buf,16);
+		uart_puts(buf);
+		uart_putc(0x20);
+
+		read = SRAM_Read(0x00000002);
+		itoa(read,buf,16);
+		uart_puts(buf);
+		uart_putc(0x20);
+
+		read = SRAM_Read(0x00000003);
+		itoa(read,buf,16);
+		uart_puts(buf);
+		uart_putc(0x20);
+
+		read = SRAM_Read(0x00000004);
+		itoa(read,buf,16);
+		uart_puts(buf);
+		uart_putc(0x20);
+
+		if(i==10){
+			SRAM_Write(0x00000002,0xBE);
+			SRAM_Write(0x00000003,0xEF);
+		}
+		if(i==11)
+			while(1);
+
+		uart_putc(10);
+		uart_putc(13);
+	}
+
+	return(0);
+}
+

poc/poc_sreg/notes

@@ -0,0 +1,2 @@
+#uisp -dprog=avr910 -dpart=ATmega8 -dserial=/dev/ttyUSB0 --rd_fuses
+#uisp -dprog=avr910 -dpart=ATmega8 -dserial=/dev/ttyUSB0 --erase --verify -v --upload if=blinky.hex

poc/poc_sreg/uart.c

@@ -0,0 +1,156 @@
+#include <avr/io.h>
+
+#include <avr/signal.h>
+
+#include <avr/interrupt.h>
+
+#include <uart.h>
+
+
+
+#define BAUDRATE 9600
+#define F_CPU 8000000
+
+
+#define nop() __asm volatile ("nop")
+
+
+
+#define SUART_TXD_PORT PORTB
+
+#define SUART_TXD_DDR  DDRB
+
+#define SUART_TXD_BIT  PB6
+
+
+
+static volatile uint16_t outframe;
+
+
+
+void uart_init()
+
+{
+
+    uint8_t sreg = SREG, tifr = 0;
+
+    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);
+
+
+
+    // PoutputCompare für gewünschte Timer1 Frequenz
+
+    OCR1A = (uint16_t) ((uint32_t) F_CPU/BAUDRATE);
+
+   
+
+    tifr |= (1 << OCF1A);
+
+    SUART_TXD_PORT |= (1 << SUART_TXD_BIT);
+
+    SUART_TXD_DDR  |= (1 << SUART_TXD_BIT);
+
+    outframe = 0;
+
+   
+
+    TIFR = tifr;
+
+   
+
+    SREG = sreg;
+
+}
+
+
+
+//#### TXD PART ##############################################
+
+
+
+void uart_putc (const char 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();
+
+}
+
+
+
+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;
+
+}
+
+
+
+void uart_puts( uint8_t *txt )			// send string
+
+{
+
+  while( *txt )
+
+    uart_putc ( *txt++ );
+
+}
+

poc/poc_sreg/uart.h

@@ -0,0 +1,8 @@
+#define SUART_TXD
+
+extern void uart_init(void);
+
+
+
+extern void uart_putc (const char);
+