added initial avr motor_ctrl
authorErik Andresen <erik@vontaene.de>
Thu, 7 May 2015 19:32:48 +0000 (21:32 +0200)
committerErik Andresen <erik@vontaene.de>
Thu, 7 May 2015 19:32:48 +0000 (21:32 +0200)
.gitignore
avr/motor_ctrl/Makefile [new file with mode: 0644]
avr/motor_ctrl/main.c [new file with mode: 0644]
avr/motor_ctrl/main.hex [new file with mode: 0644]
avr/motor_ctrl/ringbuffer.h [new file with mode: 0644]
avr/motor_ctrl/uart.c [new file with mode: 0644]
avr/motor_ctrl/uart.h [new file with mode: 0644]

index 0d20b64..b948985 100644 (file)
@@ -1 +1,2 @@
+*.swp
 *.pyc
diff --git a/avr/motor_ctrl/Makefile b/avr/motor_ctrl/Makefile
new file mode 100644 (file)
index 0000000..50995aa
--- /dev/null
@@ -0,0 +1,438 @@
+# Hey Emacs, this is a -*- makefile -*-\r
+#\r
+# WinAVR makefile written by Eric B. Weddington, Jörg Wunsch, et al.\r
+# Released to the Public Domain\r
+# Please read the make user manual!\r
+#\r
+# Additional material for this makefile was submitted by:\r
+#  Tim Henigan\r
+#  Peter Fleury\r
+#  Reiner Patommel\r
+#  Sander Pool\r
+#  Frederik Rouleau\r
+#  Markus Pfaff\r
+#\r
+# On command line:\r
+#\r
+# make all = Make software.\r
+#\r
+# make clean = Clean out built project files.\r
+#\r
+# make coff = Convert ELF to AVR COFF (for use with AVR Studio 3.x or VMLAB).\r
+#\r
+# make extcoff = Convert ELF to AVR Extended COFF (for use with AVR Studio\r
+#                4.07 or greater).\r
+#\r
+# make program = Download the hex file to the device, using avrdude.  Please\r
+#                customize the avrdude settings below first!\r
+#\r
+# make filename.s = Just compile filename.c into the assembler code only\r
+#\r
+# To rebuild project do "make clean" then "make all".\r
+#\r
+\r
+# mth 2004/09 \r
+# Differences from WinAVR 20040720 sample:\r
+# - DEPFLAGS according to Eric Weddingtion's fix (avrfreaks/gcc-forum)\r
+# - F_OSC Define in CFLAGS and AFLAGS\r
+\r
+\r
+# MCU name\r
+MCU = atmega32\r
+\r
+# Main Oscillator Frequency\r
+# This is only used to define F_OSC in all assembler and c-sources.\r
+F_OSC = 3686400\r
+\r
+# Output format. (can be srec, ihex, binary)\r
+FORMAT = ihex\r
+\r
+# Target file name (without extension).\r
+TARGET = main\r
+\r
+\r
+# List C source files here. (C dependencies are automatically generated.)\r
+SRC = $(TARGET).c uart.c\r
+\r
+\r
+# List Assembler source files here.\r
+# Make them always end in a capital .S.  Files ending in a lowercase .s\r
+# will not be considered source files but generated files (assembler\r
+# output from the compiler), and will be deleted upon "make clean"!\r
+# Even though the DOS/Win* filesystem matches both .s and .S the same,\r
+# it will preserve the spelling of the filenames, and gcc itself does\r
+# care about how the name is spelled on its command-line.\r
+ASRC = \r
+\r
+\r
+\r
+# Optimization level, can be [0, 1, 2, 3, s]. \r
+# 0 = turn off optimization. s = optimize for size.\r
+# (Note: 3 is not always the best optimization level. See avr-libc FAQ.)\r
+OPT = s\r
+\r
+# Debugging format.\r
+# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.\r
+# AVR (extended) COFF requires stabs, plus an avr-objcopy run.\r
+DEBUG = stabs\r
+#DEBUG = dwarf-2\r
+\r
+# List any extra directories to look for include files here.\r
+#     Each directory must be seperated by a space.\r
+EXTRAINCDIRS = \r
+\r
+\r
+# Compiler flag to set the C Standard level.\r
+# c89   - "ANSI" C\r
+# gnu89 - c89 plus GCC extensions\r
+# c99   - ISO C99 standard (not yet fully implemented)\r
+# gnu99 - c99 plus GCC extensions\r
+CSTANDARD = -std=gnu99\r
+\r
+# Place -D or -U options here\r
+CDEFS = -DF_CPU=4000000\r
+\r
+# Place -I options here\r
+CINCS = -Ii2c/\r
+\r
+\r
+# Compiler flags.\r
+#  -g*:          generate debugging information\r
+#  -O*:          optimization level\r
+#  -f...:        tuning, see GCC manual and avr-libc documentation\r
+#  -Wall...:     warning level\r
+#  -Wa,...:      tell GCC to pass this to the assembler.\r
+#    -adhlns...: create assembler listing\r
+CFLAGS = -g$(DEBUG)\r
+CFLAGS += $(CDEFS) $(CINCS)\r
+CFLAGS += -O$(OPT)\r
+CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums\r
+CFLAGS += -Wall -Wstrict-prototypes\r
+CFLAGS += -Wa,-adhlns=$(<:.c=.lst)\r
+CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))\r
+CFLAGS += $(CSTANDARD)\r
+CFLAGS += -DF_OSC=$(F_OSC)\r
+\r
+\r
+\r
+# Assembler flags.\r
+#  -Wa,...:   tell GCC to pass this to the assembler.\r
+#  -ahlms:    create listing\r
+#  -gstabs:   have the assembler create line number information; note that\r
+#             for use in COFF files, additional information about filenames\r
+#             and function names needs to be present in the assembler source\r
+#             files -- see avr-libc docs [FIXME: not yet described there]\r
+ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs \r
+ASFLAGS += -DF_OSC=$(F_OSC)\r
+\r
+\r
+#Additional libraries.\r
+\r
+# Minimalistic printf version\r
+PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min\r
+\r
+# Floating point printf version (requires MATH_LIB = -lm below)\r
+PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt -lm\r
+\r
+PRINTF_LIB = \r
+\r
+# Minimalistic scanf version\r
+SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min\r
+\r
+# Floating point + %[ scanf version (requires MATH_LIB = -lm below)\r
+SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt\r
+\r
+SCANF_LIB = \r
+\r
+MATH_LIB = -lm\r
+\r
+# External memory options\r
+\r
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),\r
+# used for variables (.data/.bss) and heap (malloc()).\r
+#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff\r
+\r
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),\r
+# only used for heap (malloc()).\r
+#EXTMEMOPTS = -Wl,--defsym=__heap_start=0x801100,--defsym=__heap_end=0x80ffff\r
+\r
+EXTMEMOPTS =\r
+\r
+# Linker flags.\r
+#  -Wl,...:     tell GCC to pass this to linker.\r
+#    -Map:      create map file\r
+#    --cref:    add cross reference to  map file\r
+LDFLAGS = -Wl,-Map=$(TARGET).map,--cref\r
+LDFLAGS += $(EXTMEMOPTS)\r
+LDFLAGS += $(PRINTF_LIB_MIN) $(SCANF_LIB) $(MATH_LIB)\r
+\r
+\r
+\r
+\r
+# Programming support using avrdude. Settings and variables.\r
+\r
+# Programming hardware: alf avr910 avrisp bascom bsd \r
+# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500\r
+#\r
+# Type: avrdude -c ?\r
+# to get a full listing.\r
+#\r
+#AVRDUDE_PROGRAMMER = avr911\r
+AVRDUDE_PROGRAMMER = avrisp2\r
+\r
+# com1 = serial port. Use lpt1 to connect to parallel port.\r
+#AVRDUDE_PORT = /dev/ttyUSB0    # programmer connected to serial device\r
+AVRDUDE_PORT = usb    # programmer connected to serial device\r
+\r
+AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex\r
+#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep\r
+\r
+\r
+# Uncomment the following if you want avrdude's erase cycle counter.\r
+# Note that this counter needs to be initialized first using -Yn,\r
+# see avrdude manual.\r
+#AVRDUDE_ERASE_COUNTER = -y\r
+\r
+# Uncomment the following if you do /not/ wish a verification to be\r
+# performed after programming the device.\r
+#AVRDUDE_NO_VERIFY = -V\r
+\r
+# Increase verbosity level.  Please use this when submitting bug\r
+# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude> \r
+# to submit bug reports.\r
+#AVRDUDE_VERBOSE = -v -v\r
+\r
+AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)\r
+AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)\r
+AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)\r
+AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)\r
+\r
+\r
+\r
+# ---------------------------------------------------------------------------\r
+\r
+# Define directories, if needed.\r
+DIRAVR = c:/winavr\r
+DIRAVRBIN = $(DIRAVR)/bin\r
+DIRAVRUTILS = $(DIRAVR)/utils/bin\r
+DIRINC = .\r
+DIRLIB = $(DIRAVR)/avr/lib\r
+\r
+\r
+# Define programs and commands.\r
+SHELL = sh\r
+CC = avr-gcc\r
+OBJCOPY = avr-objcopy\r
+OBJDUMP = avr-objdump\r
+SIZE = avr-size\r
+NM = avr-nm\r
+AVRDUDE = avrdude\r
+REMOVE = rm -f\r
+COPY = cp\r
+\r
+\r
+\r
+\r
+# Define Messages\r
+# English\r
+MSG_ERRORS_NONE = Errors: none\r
+MSG_BEGIN = -------- begin --------\r
+MSG_END = --------  end  --------\r
+MSG_SIZE_BEFORE = Size before: \r
+MSG_SIZE_AFTER = Size after:\r
+MSG_COFF = Converting to AVR COFF:\r
+MSG_EXTENDED_COFF = Converting to AVR Extended COFF:\r
+MSG_FLASH = Creating load file for Flash:\r
+MSG_EEPROM = Creating load file for EEPROM:\r
+MSG_EXTENDED_LISTING = Creating Extended Listing:\r
+MSG_SYMBOL_TABLE = Creating Symbol Table:\r
+MSG_LINKING = Linking:\r
+MSG_COMPILING = Compiling:\r
+MSG_ASSEMBLING = Assembling:\r
+MSG_CLEANING = Cleaning project:\r
+\r
+\r
+\r
+\r
+# Define all object files.\r
+OBJ = $(SRC:.c=.o) $(ASRC:.S=.o) \r
+\r
+# Define all listing files.\r
+LST = $(ASRC:.S=.lst) $(SRC:.c=.lst)\r
+\r
+\r
+# Compiler flags to generate dependency files.\r
+### GENDEPFLAGS = -Wp,-M,-MP,-MT,$(*F).o,-MF,.dep/$(@F).d\r
+GENDEPFLAGS = -MD -MP -MF .dep/$(@F).d\r
+\r
+# Combine all necessary flags and optional flags.\r
+# Add target processor to flags.\r
+ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)\r
+ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)\r
+\r
+\r
+\r
+\r
+\r
+# Default target.\r
+all: begin gccversion sizebefore build sizeafter finished end\r
+\r
+build: elf hex eep lss sym\r
+\r
+elf: $(TARGET).elf\r
+hex: $(TARGET).hex\r
+eep: $(TARGET).eep\r
+lss: $(TARGET).lss \r
+sym: $(TARGET).sym\r
+\r
+\r
+\r
+# Eye candy.\r
+# AVR Studio 3.x does not check make's exit code but relies on\r
+# the following magic strings to be generated by the compile job.\r
+begin:\r
+       @echo\r
+       @echo $(MSG_BEGIN)\r
+\r
+finished:\r
+       @echo $(MSG_ERRORS_NONE)\r
+\r
+end:\r
+       @echo $(MSG_END)\r
+       @echo\r
+\r
+\r
+# Display size of file.\r
+HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex\r
+ELFSIZE = $(SIZE) -A $(TARGET).elf\r
+sizebefore:\r
+       @if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); echo; fi\r
+\r
+sizeafter:\r
+       @if [ -f $(TARGET).elf ]; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); echo; fi\r
+\r
+\r
+\r
+# Display compiler version information.\r
+gccversion : \r
+       @$(CC) --version\r
+\r
+\r
+\r
+# Program the device.  \r
+program: $(TARGET).hex $(TARGET).eep\r
+       $(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)\r
+\r
+\r
+\r
+\r
+# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.\r
+COFFCONVERT=$(OBJCOPY) --debugging \\r
+--change-section-address .data-0x800000 \\r
+--change-section-address .bss-0x800000 \\r
+--change-section-address .noinit-0x800000 \\r
+--change-section-address .eeprom-0x810000 \r
+\r
+\r
+coff: $(TARGET).elf\r
+       @echo\r
+       @echo $(MSG_COFF) $(TARGET).cof\r
+       $(COFFCONVERT) -O coff-avr $< $(TARGET).cof\r
+\r
+\r
+extcoff: $(TARGET).elf\r
+       @echo\r
+       @echo $(MSG_EXTENDED_COFF) $(TARGET).cof\r
+       $(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof\r
+\r
+\r
+\r
+# Create final output files (.hex, .eep) from ELF output file.\r
+%.hex: %.elf\r
+       @echo\r
+       @echo $(MSG_FLASH) $@\r
+       $(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@\r
+\r
+%.eep: %.elf\r
+       @echo\r
+       @echo $(MSG_EEPROM) $@\r
+       -$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \\r
+       --change-section-lma .eeprom=0 -O $(FORMAT) $< $@\r
+\r
+# Create extended listing file from ELF output file.\r
+%.lss: %.elf\r
+       @echo\r
+       @echo $(MSG_EXTENDED_LISTING) $@\r
+       $(OBJDUMP) -h -S $< > $@\r
+\r
+# Create a symbol table from ELF output file.\r
+%.sym: %.elf\r
+       @echo\r
+       @echo $(MSG_SYMBOL_TABLE) $@\r
+       $(NM) -n $< > $@\r
+\r
+\r
+\r
+# Link: create ELF output file from object files.\r
+.SECONDARY : $(TARGET).elf\r
+.PRECIOUS : $(OBJ)\r
+%.elf: $(OBJ)\r
+       @echo\r
+       @echo $(MSG_LINKING) $@\r
+       $(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)\r
+\r
+\r
+# Compile: create object files from C source files.\r
+%.o : %.c\r
+       @echo\r
+       @echo $(MSG_COMPILING) $<\r
+       $(CC) -c $(ALL_CFLAGS) $< -o $@ \r
+\r
+\r
+# Compile: create assembler files from C source files.\r
+%.s : %.c\r
+       $(CC) -S $(ALL_CFLAGS) $< -o $@\r
+\r
+\r
+# Assemble: create object files from assembler source files.\r
+%.o : %.S\r
+       @echo\r
+       @echo $(MSG_ASSEMBLING) $<\r
+       $(CC) -c $(ALL_ASFLAGS) $< -o $@\r
+\r
+\r
+\r
+# Target: clean project.\r
+clean: begin clean_list finished end\r
+\r
+clean_list :\r
+       @echo\r
+       @echo $(MSG_CLEANING)\r
+       $(REMOVE) $(TARGET).hex\r
+       $(REMOVE) $(TARGET).eep\r
+       $(REMOVE) $(TARGET).obj\r
+       $(REMOVE) $(TARGET).cof\r
+       $(REMOVE) $(TARGET).elf\r
+       $(REMOVE) $(TARGET).map\r
+       $(REMOVE) $(TARGET).obj\r
+       $(REMOVE) $(TARGET).a90\r
+       $(REMOVE) $(TARGET).sym\r
+       $(REMOVE) $(TARGET).lnk\r
+       $(REMOVE) $(TARGET).lss\r
+       $(REMOVE) $(OBJ)\r
+       $(REMOVE) $(LST)\r
+       $(REMOVE) $(SRC:.c=.s)\r
+       $(REMOVE) $(SRC:.c=.d)\r
+       $(REMOVE) .dep/*\r
+\r
+\r
+\r
+# Include the dependency files.\r
+-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)\r
+\r
+\r
+# Listing of phony targets.\r
+.PHONY : all begin finish end sizebefore sizeafter gccversion \\r
+build elf hex eep lss sym coff extcoff \\r
+clean clean_list program\r
+\r
diff --git a/avr/motor_ctrl/main.c b/avr/motor_ctrl/main.c
new file mode 100644 (file)
index 0000000..0c07d13
--- /dev/null
@@ -0,0 +1,602 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/sleep.h>
+#include "uart.h"
+
+/*
+ * I2C Register Map (8 Bit)
+ * 0x00 Register select
+ * 0x01 Motor 1 PWM MSB
+ * 0x02 Motor 1 PWM LSB
+ * 0x03 Motor 2 PWM MSB
+ * 0x04 Motor 2 PWM LSB
+ * 0x05 Motor 3 PWM MSB
+ * 0x06 Motor 3 PWM LSB
+ * 0x07 Motor 4 PWM MSB
+ * 0x08 Motor 4 PWM LSB
+ * free
+ * 0x10 Hall 1 MSB
+ * 0x11 Hall 1 LSB
+ * 0x12 Hall 2 MSB
+ * 0x13 Hall 2 LSB
+ * 0x14 Hall 3 MSB
+ * 0x15 Hall 3 LSB
+ * 0x16 Hall 4 MSB
+ * 0x17 Hall 4 LSB
+ * free
+ * 0x20 Motor 1 speed wish MSB
+ * 0x21 Motor 1 speed wish LSB
+ * 0x22 Motor 2 speed wish MSB
+ * 0x23 Motor 2 speed wish LSB
+ * 0x24 Motor 3 speed wish MSB
+ * 0x25 Motor 3 speed wish LSB
+ * 0x26 Motor 4 speed wish MSB
+ * 0x27 Motor 4 speed wish LSB
+ * free
+ * 0x90 Motor 1 switch
+ * 0x91 Motor 2 switch
+ * 0x92 Motor 3 switch
+ * 0x93 Motor 4 switch
+ * free
+ * 0xff Bootloader
+ */
+
+
+#define TWI_ACK                TWCR = (1<<TWEA) | (1<<TWINT) | (1<<TWEN) | (1<<TWIE)
+#define TWI_RESET      TWCR &= ~((1 << TWSTO) | (1 << TWEN)); TWI_ACK
+#define TWI_NAK                TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWIE)
+
+#define KP 10.0
+#define KI 0.0 
+#define KD 0.0 
+#define TIMER0_T 0.020
+
+enum mode {
+       MOTOR_MANUAL,
+       MOTOR_PID
+};
+
+static volatile uint8_t ireg=0;
+static volatile uint8_t bootloader=0;
+static volatile int16_t motor1=0;
+static volatile int16_t motor2=0;
+static volatile int16_t motor3=0;
+static volatile int16_t motor4=0;
+static volatile int16_t pos1=0;
+static volatile int16_t pos2=0;
+static volatile int16_t pos3=0;
+static volatile int16_t pos4=0;
+static volatile enum mode motor1_mode=MOTOR_MANUAL;
+static volatile enum mode motor2_mode=MOTOR_MANUAL;
+static volatile enum mode motor3_mode=MOTOR_MANUAL;
+static volatile enum mode motor4_mode=MOTOR_MANUAL;
+static volatile uint8_t motor1_switch=0;
+static volatile uint8_t motor2_switch=0;
+static volatile uint8_t motor3_switch=0;
+static volatile uint8_t motor4_switch=0;
+static volatile int16_t speed1_wish=0;
+static volatile int16_t speed2_wish=0;
+static volatile int16_t speed3_wish=0;
+static volatile int16_t speed4_wish=0;
+static volatile int16_t speed1=0;
+static volatile int16_t speed2=0;
+static volatile int16_t speed3=0;
+static volatile int16_t speed4=0;
+static volatile int16_t eold1=0;
+static volatile int16_t eold2=0;
+static volatile int16_t eold3=0;
+static volatile int16_t eold4=0;
+static volatile int32_t esum1=0;
+static volatile int32_t esum2=0;
+static volatile int32_t esum3=0;
+static volatile int32_t esum4=0;
+static volatile int16_t pos1_last=0;
+static volatile int16_t pos2_last=0;
+static volatile int16_t pos3_last=0;
+static volatile int16_t pos4_last=0;
+
+ISR(TWI_vect)
+{
+       static uint8_t tmp=0;
+       static int16_t tmp16=0;
+
+       switch (TWSR & 0xF8)
+       {  
+               case 0x60: // start write
+                       TWI_ACK;
+                       ireg = 0;
+                       break;
+               case 0x80: // write
+                       switch(ireg) {
+                               case 0x00: // register select
+                                       ireg = TWDR;
+                                       ireg--; // because we do ireg++ below
+                                       TWI_ACK;
+                                       break;
+                               case 0x01: // Motor 1 MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x02: // Motor 1 LSB
+                                       motor1 = tmp<<8 | TWDR;
+                                       motor1_mode = MOTOR_MANUAL;
+                                       TWI_ACK;
+                                       break;
+                               case 0x03: // Motor 2 MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x04: // Motor 2 LSB
+                                       motor2 = tmp<<8 | TWDR;
+                                       motor2_mode = MOTOR_MANUAL;
+                                       TWI_ACK;
+                                       break;
+                               case 0x05: // Motor 3 MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x06: // Motor 3 LSB
+                                       motor3 = tmp<<8 | TWDR;
+                                       motor3_mode = MOTOR_MANUAL;
+                                       TWI_ACK;
+                                       break;
+                               case 0x07: // Motor 4 MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x08: // Motor 4 LSB
+                                       motor4 = tmp<<8 | TWDR;
+                                       motor4_mode = MOTOR_MANUAL;
+                                       TWI_ACK;
+                                       break;
+                               case 0x20: // Motor 1 speed wish MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x21: // Motor 1 speed wish LSB
+                                       speed1_wish = tmp<<8 | TWDR;
+                                       motor1_mode = MOTOR_PID;
+                                       TWI_ACK;
+                                       break;
+                               case 0x22: // Motor 2 speed wish MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x23: // Motor 2 speed wish LSB
+                                       speed2_wish = tmp<<8 | TWDR;
+                                       motor2_mode = MOTOR_PID;
+                                       TWI_ACK;
+                                       break;
+                               case 0x24: // Motor 3 speed wish MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x25: // Motor 3 speed wish LSB
+                                       speed3_wish = tmp<<8 | TWDR;
+                                       motor3_mode = MOTOR_PID;
+                                       TWI_ACK;
+                                       break;
+                               case 0x26: // Motor 4 speed wish MSB
+                                       tmp = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x27: // Motor 4 speed wish LSB
+                                       speed4_wish = tmp<<8 | TWDR;
+                                       motor4_mode = MOTOR_PID;
+                                       TWI_ACK;
+                                       break;
+                               case 0x90: // Motor 1 switch
+                                       motor1_switch = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x91: // Motor 2 switch
+                                       motor2_switch = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x92: // Motor 3 switch
+                                       motor3_switch = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0x93: // Motor 4 switch
+                                       motor4_switch = TWDR;
+                                       TWI_ACK;
+                                       break;
+                               case 0xff: // bootloader
+                                       bootloader = TWDR;
+                               default:
+                                       TWI_NAK;
+                       }
+                       ireg++;
+                       break;
+               case 0xA8: // start read
+               case 0xB8: // read
+                       switch(ireg) {
+                               case 0x02: // Motor 1 PWM
+                                       TWDR = OCR1A;
+                                       TWI_ACK;
+                                       break;
+                               case 0x04: // Motor 2 PWM
+                                       TWDR = OCR1B;
+                                       TWI_ACK;
+                                       break;
+                               case 0x06: // Motor 3 PWM
+                                       TWDR = OCR2;
+                                       TWI_ACK;
+                                       break;
+                               case 0x08: // Motor 4 PWM
+                                       TWDR = OCR0;
+                                       TWI_ACK;
+                                       break;
+                               case 0x10: // Hall 1 MSB
+                                       tmp16 = pos1;
+                                       TWDR = tmp16>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x11: // Hall 1 LSB
+                                       TWDR = tmp16;
+                                       TWI_ACK;
+                                       break;
+                               case 0x12: // Hall 2 MSB
+                                       tmp16 = pos2;
+                                       TWDR = tmp16>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x13: // Hall 2 LSB
+                                       TWDR = tmp16;
+                                       TWI_ACK;
+                                       break;
+                               case 0x14: // Hall 3 MSB
+                                       tmp16 = pos3;
+                                       TWDR = tmp16>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x15: // Hall 3 LSB
+                                       TWDR = tmp16;
+                                       TWI_ACK;
+                                       break;
+                               case 0x16: // Hall 4 MSB
+                                       tmp16 = pos4;
+                                       TWDR = tmp16>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x17: // Hall 4 LSB
+                                       TWDR = tmp16;
+                                       TWI_ACK;
+                                       break;
+                               case 0x20: // Motor 1 speed wish MSB
+                                       TWDR = speed1_wish>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x21: // Motor 1 speed wish LSB
+                                       TWDR = speed1_wish;
+                                       TWI_ACK;
+                                       break;
+                               case 0x22: // Motor 2 speed wish MSB
+                                       TWDR = speed2_wish>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x23: // Motor 2 speed wish LSB
+                                       TWDR = speed2_wish;
+                                       TWI_ACK;
+                                       break;
+                               case 0x24: // Motor 3 speed wish MSB
+                                       TWDR = speed3_wish>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x25: // Motor 3 speed wish LSB
+                                       TWDR = speed3_wish;
+                                       TWI_ACK;
+                                       break;
+                               case 0x26: // Motor 4 speed wish MSB
+                                       TWDR = speed4_wish>>8;
+                                       TWI_ACK;
+                                       break;
+                               case 0x27: // Motor 4 speed wish LSB
+                                       TWDR = speed4_wish;
+                                       TWI_ACK;
+                                       break;
+                               default:
+                                       TWDR = 0;
+                                       TWI_NAK;
+                       }
+                       ireg++;
+                       break;
+               default:
+                       TWI_RESET;
+       }
+}
+
+
+static void update_hall1(void) {
+       unsigned char status = (PINA >> 0) & 0x3;
+       static unsigned char oldstatus=0;
+       unsigned char diff, new;
+
+       new = 0;
+       if (status & 0x1)
+               new = 0x3;
+       if (status & 0x2)
+               new ^= 0x1;                                     // convert gray to binary
+       diff = oldstatus - new;                         // difference last - new
+       if (diff & 0x1) {                               // bit 0 = value (1)
+               oldstatus = new;                                        // store new as next last
+               if (motor1_switch) pos1 -= (diff & 2) - 1;              // bit 1 = direction (+/-)
+               else pos1 += (diff & 2) - 1;
+       }
+}
+
+
+static void update_hall2(void) {
+       unsigned char status = (PINA >> 2) & 0x3;
+       static unsigned char oldstatus=0;
+       unsigned char diff, new;
+
+       new = 0;
+       if (status & 0x1)
+               new = 0x3;
+       if (status & 0x2)
+               new ^= 0x1;                                     // convert gray to binary
+       diff = oldstatus - new;                         // difference last - new
+       if (diff & 0x1) {                               // bit 0 = value (1)
+               oldstatus = new;                                        // store new as next last
+               if (motor2_switch) pos2 += (diff & 2) - 1;              // bit 1 = direction (+/-)
+               else pos2 -= (diff & 2) - 1;
+       }
+}
+
+
+static void update_hall3(void) {
+       unsigned char status = (PINA >> 4) & 0x3;
+       static unsigned char oldstatus=0;
+       unsigned char diff, new;
+
+       new = 0;
+       if (status & 0x1)
+               new = 0x3;
+       if (status & 0x2)
+               new ^= 0x1;                                     // convert gray to binary
+       diff = oldstatus - new;                         // difference last - new
+       if (diff & 0x1) {                               // bit 0 = value (1)
+               oldstatus = new;                                        // store new as next last
+               if (motor3_switch) pos3 += (diff & 2) - 1;              // bit 1 = direction (+/-)
+               else pos3 -= (diff & 2) - 1;
+       }
+}
+
+
+static void update_hall4(void) {
+       unsigned char status = (PINA >> 6) & 0x3;
+       static unsigned char oldstatus=0;
+       unsigned char diff, new;
+
+       new = 0;
+       if (status & 0x1)
+               new = 0x3;
+       if (status & 0x2)
+               new ^= 0x1;                                     // convert gray to binary
+       diff = oldstatus - new;                         // difference last - new
+       if (diff & 0x1) {                               // bit 0 = value (1)
+               oldstatus = new;                                        // store new as next last
+               if (motor4_switch) pos4 += (diff & 2) - 1;              // bit 1 = direction (+/-)
+               else pos4 -= (diff & 2) - 1;
+       }
+}
+
+
+static void update_motor(void) {
+       static int16_t m1_old=SHRT_MIN;
+       static int16_t m2_old=SHRT_MIN;
+       static int16_t m3_old=SHRT_MIN;
+       static int16_t m4_old=SHRT_MIN;
+
+       if (m1_old != motor1) { // update only when changed
+               if (motor1 == 0) {
+                       // stop
+                       PORTC |= (1 << 3) | (1 << 2);
+               } else if ((!motor1_switch && motor1 > 0) || (motor1_switch && motor1 < 0)) {
+                       // forward
+                       PORTC &= ~(1 << 3) & ~(1 << 2);
+               } else { // motor1 < 0
+                       // backward
+                       PORTC &= ~(1 << 2);
+                       PORTC |=  (1 << 3);
+               }
+
+               m1_old = motor1;
+               OCR1A = abs(motor1);
+       }
+
+       if (m2_old != motor2) { // update only when changed
+               if (motor2 == 0) {
+                       // stop
+                       PORTC |= (1 << 5) | (1 << 4);
+               } else if ((!motor2_switch && motor2 > 0) || (motor2_switch && motor2 < 0)) {
+                       // forward
+                       PORTC &= ~(1 << 5) & ~(1 << 4);
+               } else { // motor2 < 0
+                       // backward
+                       PORTC &= ~(1 << 4);
+                       PORTC |=  (1 << 5);
+               }
+
+               m2_old = motor2;
+               OCR1B = abs(motor2);
+       }
+
+       if (m3_old != motor3) { // update only when changed
+               if (motor3 == 0) {
+                       // stop
+                       PORTC |= (1 << 7) | (1 << 6);
+               } else if ((!motor3_switch && motor3 > 0) || (motor3_switch && motor3 < 0)) {
+                       // forward
+                       PORTC &= ~(1 << 7) & ~(1 << 6);
+               } else { // motor3 < 0
+                       // backward
+                       PORTC &= ~(1 << 6);
+                       PORTC |=  (1 << 7);
+               }
+
+               m3_old = motor3;
+               OCR2 = abs(motor3);
+       }
+
+       if (m4_old != motor4) { // update only when changed
+               if (motor4 == 0) {
+                       // stop
+                       PORTD |= (1 << 3) | (1 << 2);
+               } else if ((!motor4_switch && motor4 > 0) || (motor4_switch && motor4 < 0)) {
+                       // forward
+                       PORTD &= ~(1 << 3) & ~(1 << 2);
+               } else { // motor4 < 0
+                       // backward
+                       PORTD &= ~(1 << 2);
+                       PORTD |=  (1 << 3);
+               }
+
+               m4_old = motor4;
+               OCR0 = abs(motor4);
+       }
+}
+
+
+ISR(TIMER0_OVF_vect) {
+       update_hall1();
+       update_hall2();
+       update_hall3();
+       update_hall4();
+
+       // PID control
+       if (motor1_mode == MOTOR_PID) {
+               speed1 = (pos1 - pos1_last)/TIMER0_T;
+
+               if (speed1_wish == 0) {
+                       motor1 = 0;
+               } else {
+                       int16_t e = speed1_wish - speed1;
+                       esum1+=e;
+                       motor1 += KP*e + KI*TIMER0_T*esum1 + KD/TIMER0_T*(e - eold1);
+                       eold1 = e;
+
+                        if (motor1 > 255) motor1 = 255;
+                       else if (motor1 < -255) motor1 = -255;
+               }
+
+               pos1_last = pos1;
+       }
+       if (motor2_mode == MOTOR_PID) {
+               speed2 = (pos2 - pos2_last)/TIMER0_T;
+
+               if (speed2_wish == 0) {
+                       motor2 = 0;
+               } else {
+                       int16_t e = speed2_wish - speed2;
+                       esum2+=e;
+                       motor2 += KP*e + KI*TIMER0_T*esum2 + KD/TIMER0_T*(e - eold2);
+                       eold2 = e;
+
+                        if (motor2 > 255) motor2 = 255;
+                       else if (motor2 < -255) motor2 = -255;
+               }
+
+               pos2_last = pos2;
+       }
+       if (motor3_mode == MOTOR_PID) {
+               speed3 = (pos3 - pos3_last)/TIMER0_T;
+
+               if (speed3_wish == 0) {
+                       motor3 = 0;
+               } else {
+                       int16_t e = speed3_wish - speed3;
+                       esum3+=e;
+                       motor3 += KP*e + KI*TIMER0_T*esum3 + KD/TIMER0_T*(e - eold3);
+                       eold3 = e;
+
+                        if (motor3 > 255) motor3 = 255;
+                       else if (motor3 < -255) motor3 = -255;
+               }
+
+               pos3_last = pos3;
+       }
+       if (motor4_mode == MOTOR_PID) {
+               speed4 = (pos4 - pos4_last)/TIMER0_T;
+
+               if (speed4_wish == 0) {
+                       motor4 = 0;
+               } else {
+                       int16_t e = speed4_wish - speed4;
+                       esum4+=e;
+                       motor4 += KP*e + KI*TIMER0_T*esum4 + KD/TIMER0_T*(e - eold4);
+                       eold4 = e;
+
+                        if (motor4 > 255) motor4 = 255;
+                       else if (motor4 < -255) motor4 = -255;
+               }
+
+               pos4_last = pos4;
+       }
+}
+
+
+int main(void) {
+       // Outputs
+       DDRB = (1 << 3);
+       DDRC = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2);
+       DDRD = (1 << 7) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2);
+
+       bootloader = 0x00;
+       setup_uart(9600);
+       uart_setup_stdout();
+
+       // I2C
+       TWAR = 0x50;
+       TWI_RESET;
+
+       // Motor 1 & 2
+       // Timer 1: Fast PWM inverting mode, Top=256 => 15.625Hz
+       // Prescaler=1
+       TCCR1A = (1 << COM1A1) | (1 << COM1B1) | (1 << WGM10);
+       TCCR1B = (1 << WGM12) | (1 << CS10);
+       OCR1A = 0;
+       OCR1B = 0;
+
+       // Motor 3
+       // Timer 2: Fast PWM, Top=256 => 15.625Hz
+       // Prescaler=1
+       TCCR2 = (1 << WGM21) | (1 << WGM20) | (1 << COM21) | (1 << CS20);
+       OCR2 = 0;
+
+       // Motor 4
+       // Timer 0: Fast PWM, Top=256 => 15.625Hz
+       // Prescaler=1
+       TCCR0 = (1 << WGM01) | (1 << WGM00) | (1 << COM01) | (1 << CS00);
+       OCR0 = 0;
+
+       printf("\r\nStart\r\n");
+
+       set_sleep_mode(SLEEP_MODE_IDLE);
+       // Enable Timer 1 Overflow Interrupt
+       TIMSK = (1 << TOIE1);
+       sei();
+
+       while(1) {
+               switch(ireg) {
+                       case 0xff: // Magic reg that starts the bootloader
+                               if (bootloader == 0xa5) {
+                                       cli();
+                                       {
+                                               void (*start)(void) = (void*)0x1800;
+                                               start();
+                                       }
+                               }
+                               break;
+               }
+               update_motor();
+
+               sleep_mode();
+       }
+
+       return 0;
+}
diff --git a/avr/motor_ctrl/main.hex b/avr/motor_ctrl/main.hex
new file mode 100644 (file)
index 0000000..6b1dece
--- /dev/null
@@ -0,0 +1,456 @@
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diff --git a/avr/motor_ctrl/ringbuffer.h b/avr/motor_ctrl/ringbuffer.h
new file mode 100644 (file)
index 0000000..ed8b022
--- /dev/null
@@ -0,0 +1,34 @@
+#ifndef RINGBUFFER_H
+#define RINGBUFFER_H
+
+#define RINGBUFFER_LEN 100
+#define RINGBUFFER_MAX_NUM 1
+
+typedef struct ringbuffer {
+       char read[RINGBUFFER_LEN];
+       char *in_read_ptr;
+       char *out_read_ptr;
+       char write[RINGBUFFER_LEN];
+       char *in_write_ptr;
+       char *out_write_ptr;
+       FILE *dev;
+       FILE *dev_in_as_out;
+       uint8_t newlines;
+       char block_read;
+} ringbuffer_t;
+
+ringbuffer_t *ringbuffers[RINGBUFFER_MAX_NUM];
+uint8_t num_ringbuffers;
+
+void ringbuffer_setup(FILE *stream, ringbuffer_t *buffer);
+void ringbuffer_setup_in_as_out(FILE *stream, ringbuffer_t *buffer);
+void init_ringbuffers(void);
+void stream_setup(FILE *uart_stream);
+void stream_setup_out_only(FILE *stream);
+void stream_setup_in_as_out(FILE *stream, int ringbuffer_putchar_sound(char, FILE*));
+uint8_t ringbuffer_busy(void);
+void ringbuffer_set_read_noblock(FILE *stream);
+void ringbuffer_set_read_block(FILE *stream, char c);
+
+#endif
+
diff --git a/avr/motor_ctrl/uart.c b/avr/motor_ctrl/uart.c
new file mode 100644 (file)
index 0000000..24de2f2
--- /dev/null
@@ -0,0 +1,97 @@
+#include <stdlib.h>
+#include "uart.h"
+#include <avr/interrupt.h>
+
+#define UART_UBRR_CALC(BAUD_,FREQ_) ((FREQ_)/((BAUD_)*16L)-1)
+
+static volatile        char read[RINGBUFFER_LEN];
+static volatile        char *in_read_ptr;
+static volatile        char *out_read_ptr;
+
+ISR(USART_RXC_vect) {
+       // update read from uart
+       if (UCSRA & (1<<RXC)) {
+               *in_read_ptr = UDR;
+
+               if (in_read_ptr < read + RINGBUFFER_LEN - 1) in_read_ptr++;
+               else in_read_ptr = (char *)read;
+       }
+}
+
+
+void setup_uart(unsigned int rate) {
+       UCSRB |= (1<<TXEN) | (1<<RXEN); // UART TX & RX
+       UCSRB |= (1<<RXCIE);            // RX Interrupt
+       UCSRC |= (3<<UCSZ0); // Asynchron 8N1
+
+       UBRRH = (uint8_t)(UART_UBRR_CALC(rate, F_CPU) >> 8);
+       UBRRL = (uint8_t)UART_UBRR_CALC(rate, F_CPU);
+
+       in_read_ptr = out_read_ptr = read;
+}
+
+
+void uart_putc(char *c) {
+       while (!(UCSRA & (1<<UDRE)));
+       UDR = *c;
+}
+
+
+int uart_putchar(char c, FILE *stream)
+{
+       uart_putc(&c);
+       return 0;
+}
+
+
+void uart_puts(char *s) {
+       char *c;
+
+       for (c = s; *c != '\0'; c++)
+               uart_putc(c);
+}
+
+
+int uart_getchar(FILE *stream)
+{
+       return uart_getc();
+}
+
+
+int uart_getc() {
+       while (!(UCSRA & (1<<RXC)));
+       return UDR;
+}
+
+
+void uart_setup_stdout() {
+       fdevopen(uart_putchar, uart_getchar);
+}
+
+
+void uart_stream_update(ringbuffer_t *buffer) {
+       // update write to uart
+       if (buffer->out_write_ptr != buffer->in_write_ptr) {
+               if (UCSRA & (1<<UDRE)) {
+                       UDR = *buffer->out_write_ptr;
+                       if (buffer->out_write_ptr < buffer->write + RINGBUFFER_LEN - 1) buffer->out_write_ptr++;
+                       else buffer->out_write_ptr = buffer->write;
+               }
+       }
+
+       // update read from uart        
+       if (in_read_ptr != out_read_ptr) {
+               *buffer->in_read_ptr = *out_read_ptr;
+
+               // update newline chars
+               if (buffer->block_read == *buffer->in_read_ptr) buffer->newlines++;
+
+               if (buffer->in_read_ptr < buffer->read + RINGBUFFER_LEN - 1) buffer->in_read_ptr++;
+               else buffer->in_read_ptr = buffer->read;
+
+               // move pointer
+               if (out_read_ptr < read + RINGBUFFER_LEN - 1) out_read_ptr++;
+               else out_read_ptr = read;
+       }
+}
+
diff --git a/avr/motor_ctrl/uart.h b/avr/motor_ctrl/uart.h
new file mode 100644 (file)
index 0000000..1225590
--- /dev/null
@@ -0,0 +1,18 @@
+#ifndef UART_H
+#define UART_H
+
+#include <stdio.h>
+#include "ringbuffer.h"
+
+void setup_uart(unsigned int rate);
+void uart_putc(char *c);
+void uart_puts(char *s);
+int uart_getc(void);
+void uart_puti(int i);
+int uart_putchar(char c, FILE *stream);
+int uart_getchar(FILE *stream);
+void uart_setup_stdout(void);
+void uart_stream_update(ringbuffer_t *buffer);
+
+#endif
+