pull/1/head
parent
6481532760
commit
83c253e445
@ -1 +0,0 @@ |
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Subproject commit 21e5a96cdfa446af0266c3e37ab21ec1347f3646 |
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MCU = atmega328p
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F_CPU = 16000000
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LFUSE = 0xFF
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HFUSE = 0xDE
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EFUSE = 0x05
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MAIN = main.c
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## If you've split your program into multiple files,
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## include the additional .c source (in same directory) here
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## (and include the .h files in your foo.c)
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LOCAL_SOURCE = ws_driver.c
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## Here you can link to one more directory (and multiple .c files)
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# EXTRA_SOURCE_DIR = ../AVR-Programming-Library/
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EXTRA_SOURCE_DIR =
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EXTRA_SOURCE_FILES =
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##########------------------------------------------------------##########
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########## Programmer Defaults ##########
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########## Set up once, then forget about it ##########
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########## (Can override. See bottom of file.) ##########
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##########------------------------------------------------------##########
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#19200
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PROGRAMMER_TYPE = arduino
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PROGRAMMER_ARGS = -b 57600 -P /dev/ttyUSB0
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##########------------------------------------------------------##########
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########## Makefile Magic! ##########
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########## Summary: ##########
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########## We want a .hex file ##########
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########## Compile source files into .elf ##########
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########## Convert .elf file into .hex ##########
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########## You shouldn't need to edit below. ##########
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##########------------------------------------------------------##########
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## Defined programs / locations
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CC = avr-gcc
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OBJCOPY = avr-objcopy
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OBJDUMP = avr-objdump
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AVRSIZE = avr-size
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AVRDUDE = sudo avrdude
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## Compilation options, type man avr-gcc if you're curious.
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CFLAGS = -std=gnu99 -mmcu=$(MCU) -DF_CPU=$(F_CPU)UL -Os -I. -I$(EXTRA_SOURCE_DIR)
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CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
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CFLAGS += -Wall -Wstrict-prototypes -Wno-main -Wno-strict-prototypes -Wno-comment
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CFLAGS += -g2 -ggdb
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CFLAGS += -ffunction-sections -fdata-sections -Wl,--gc-sections -Wl,--relax
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CFLAGS += -std=gnu99
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# CFLAGS += -lm
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## CFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm ## for floating-point printf
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## CFLAGS += -Wl,-u,vfprintf -lprintf_min ## for smaller printf
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## Lump target and extra source files together
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TARGET = $(strip $(basename $(MAIN)))
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SRC = $(TARGET).c
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EXTRA_SOURCE = $(addprefix $(EXTRA_SOURCE_DIR), $(EXTRA_SOURCE_FILES))
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SRC += $(EXTRA_SOURCE)
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SRC += $(LOCAL_SOURCE)
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## List of all header files
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HEADERS = $(SRC:.c=.h)
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## For every .c file, compile an .o object file
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OBJ = $(SRC:.c=.o)
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## Generic Makefile targets. (Only .hex file is necessary)
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all: $(TARGET).hex size |
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%.hex: %.elf |
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$(OBJCOPY) -R .eeprom -O ihex $< $@
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%.elf: $(SRC) |
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$(CC) $(CFLAGS) $(SRC) --output $@
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%.eeprom: %.elf |
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$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@
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debug: |
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@echo
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@echo "Source files:" $(SRC)
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@echo "MCU, F_CPU, BAUD:" $(MCU), $(F_CPU), $(BAUD)
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@echo
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# Optionally create listing file from .elf
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# This creates approximate assembly-language equivalent of your code.
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# Useful for debugging time-sensitive bits,
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# or making sure the compiler does what you want.
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disassemble: $(TARGET).lst |
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dis: disassemble |
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eeprom: $(TARGET).eeprom |
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%.lst: %.elf |
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$(OBJDUMP) -S $< > $@
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# Optionally show how big the resulting program is
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size: $(TARGET).elf |
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$(AVRSIZE) -C --mcu=$(MCU) $(TARGET).elf
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clean: |
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rm -f $(TARGET).elf $(TARGET).hex $(TARGET).obj \
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$(TARGET).o $(TARGET).d $(TARGET).eep $(TARGET).lst \
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$(TARGET).lss $(TARGET).sym $(TARGET).map $(TARGET)~ \
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$(TARGET).eeprom
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squeaky_clean: |
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rm -f *.elf *.hex *.obj *.o *.d *.eep *.lst *.lss *.sym *.map *~
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##########------------------------------------------------------##########
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########## Programmer-specific details ##########
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########## Flashing code to AVR using avrdude ##########
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##########------------------------------------------------------##########
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flash: $(TARGET).hex |
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$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$<
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flash_eeprom: $(TARGET).eeprom |
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$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$<
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terminal: |
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$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt
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flash_arduino: PROGRAMMER_TYPE = arduino |
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flash_arduino: PROGRAMMER_ARGS = |
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flash_arduino: flash |
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flash_dragon_isp: PROGRAMMER_TYPE = dragon_isp |
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flash_dragon_isp: PROGRAMMER_ARGS = |
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flash_dragon_isp: flash |
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##########------------------------------------------------------##########
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########## Fuse settings and suitable defaults ##########
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##########------------------------------------------------------##########
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## Generic
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FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m
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fuses: |
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$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) \
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$(PROGRAMMER_ARGS) $(FUSE_STRING)
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show_fuses: |
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$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nv
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## Called with no extra definitions, sets to defaults
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set_default_fuses: FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):m |
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set_default_fuses: fuses |
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WS2812B RGB LED strip driving code |
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================================== |
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This code is meant for 16MHz Arduino, but should work on any 16MHz AVR. It is in plain C, not the Arduino language. |
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All you need is `ws_driver.c` and `ws_driver.h`, and `config.c` where you define the port / pin information. |
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Connection |
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---------- |
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Digital pin 8 on Arduino (PB0) is connected via a 200-500 R to WS2812B data input. In parallel to the LED strip is a 500-1000 uF capacitor that takes care of smoothening the power supply. Without the cap, the LEDs will flicker. |
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It is recommended to use stronger power supply for the LED strip, a 30-led one takes around to 1A when fully powered. |
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#pragma once |
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#include <avr/io.h> |
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#define D0 0 |
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#define D1 1 |
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#define D2 2 |
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#define D3 3 |
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#define D4 4 |
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#define D5 5 |
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#define D6 6 |
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#define D7 7 |
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#define D8 0 |
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#define D9 1 |
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#define D10 2 |
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#define D11 3 |
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#define D12 4 |
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#define D13 5 |
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#define A0 0 |
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#define A1 1 |
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#define A2 2 |
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#define A3 3 |
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#define A4 4 |
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#define A5 5 |
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// port definitions
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#define PORT_D0 PORTD |
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#define PORT_D1 PORTD |
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#define PORT_D2 PORTD |
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#define PORT_D3 PORTD |
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#define PORT_D4 PORTD |
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#define PORT_D5 PORTD |
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#define PORT_D6 PORTD |
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#define PORT_D7 PORTD |
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#define PORT_D8 PORTB |
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#define PORT_D9 PORTB |
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#define PORT_D10 PORTB |
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#define PORT_D11 PORTB |
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#define PORT_D12 PORTB |
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#define PORT_D13 PORTB |
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#define PORT_A0 PORTC |
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#define PORT_A1 PORTC |
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#define PORT_A2 PORTC |
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#define PORT_A3 PORTC |
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#define PORT_A4 PORTC |
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#define PORT_A5 PORTC |
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#define PIN_D0 PIND |
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#define PIN_D1 PIND |
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#define PIN_D2 PIND |
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#define PIN_D3 PIND |
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#define PIN_D4 PIND |
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#define PIN_D5 PIND |
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#define PIN_D6 PIND |
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#define PIN_D7 PIND |
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#define PIN_D8 PINB |
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#define PIN_D9 PINB |
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#define PIN_D10 PINB |
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#define PIN_D11 PINB |
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#define PIN_D12 PINB |
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#define PIN_D13 PINB |
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#define PIN_A0 PINC |
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#define PIN_A1 PINC |
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#define PIN_A2 PINC |
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#define PIN_A3 PINC |
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#define PIN_A4 PINC |
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#define PIN_A5 PINC |
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#define DDR_D0 DDRD |
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#define DDR_D1 DDRD |
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#define DDR_D2 DDRD |
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#define DDR_D3 DDRD |
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#define DDR_D4 DDRD |
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#define DDR_D5 DDRD |
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#define DDR_D6 DDRD |
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#define DDR_D7 DDRD |
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#define DDR_D8 DDRB |
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#define DDR_D9 DDRB |
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#define DDR_D10 DDRB |
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#define DDR_D11 DDRB |
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#define DDR_D12 DDRB |
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#define DDR_D13 DDRB |
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#define DDR_A0 DDRC |
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#define DDR_A1 DDRC |
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#define DDR_A2 DDRC |
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#define DDR_A3 DDRC |
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#define DDR_A4 DDRC |
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#define DDR_A5 DDRC |
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#define OUT 1 |
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#define IN 0 |
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#pragma once |
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#include "arduino_pins.h" |
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#define WS_PORT PORT_D8 |
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#define WS_BIT D8 |
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#define WS_DDR DDR_D8 |
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#define WS_T_1H 700 |
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#define WS_T_1L 150 |
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#define WS_T_0H 150 |
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#define WS_T_0L 700 |
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#define WS_T_LATCH 6000 |
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#include <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <avr/pgmspace.h> |
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#include <avr/cpufunc.h> |
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#include <util/delay.h> |
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#include <util/delay_basic.h> |
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#include <stdbool.h> |
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#include <stdint.h> |
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#include <math.h> |
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#include "arduino_pins.h" |
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#include "utils.h" |
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#include "config.h" |
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#include "ws_driver.h" |
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void init_io(void) SECTION(".init8"); |
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void init_io() |
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{ |
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set_bit(WS_DDR, WS_BIT, OUT); |
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} |
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void main() |
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{ |
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const uint8_t anim_step = 5; |
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const uint8_t anim_max = 255; |
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uint8_t r = 0; |
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uint8_t g = 0; |
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uint8_t b = 0; |
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uint8_t step = 0; |
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uint8_t r2 = anim_max; |
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uint8_t g2 = 0; |
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uint8_t b2 = 0; |
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uint8_t step2 = 0; |
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while (1) { |
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r = r2; |
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g = g2; |
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b = b2; |
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step = step2; |
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for (uint8_t i = 0; i < 72; i++) { |
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ws_send_rgb(r, g, b); |
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if (i == 1) { |
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r2 = r; |
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g2 = g; |
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b2 = b; |
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step2 = step; |
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} |
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switch (step) { |
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case 0: |
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g += anim_step; |
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if (g == anim_max) step++; |
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break; |
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case 1: |
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r -= anim_step; |
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if (r == 0) step++; |
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break; |
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case 2: |
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b += anim_step; |
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if (b == anim_max) step++; |
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break; |
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case 3: |
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g -= anim_step; |
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if (g == 0) step++; |
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break; |
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case 4: |
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r += anim_step; |
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if (r == anim_max) step++; |
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break; |
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default: |
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b -= anim_step; |
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if (b == 0) step = 0; |
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break; |
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} |
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} |
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ws_show(); |
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_delay_ms(30); |
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} |
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} |
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// void main()
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// {
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// while (1) {
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// uint8_t r = 250;
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// uint8_t g = 0;
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// uint8_t b = 0;
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// uint8_t step = 0;
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// for (uint8_t i = 0; i < 30; i++) {
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// ws_send_rgb(r, g, b);
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// switch (step) {
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// case 0:
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// r -= 50;
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// g += 50;
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// if (g == 250) step++;
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// break;
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// case 1:
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// g -= 50;
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// b += 50;
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// if (b == 250) step++;
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// break;
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// case 2:
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// b -= 50;
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// r += 50;
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// if (r == 250) step=0;
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// break;
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// }
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// }
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// ws_show();
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// _delay_ms(100);
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// }
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// }
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@ -0,0 +1,15 @@ |
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#pragma once |
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#include <avr/io.h> |
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// general macros
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#define SECTION(pos) __attribute__((naked, used, section(pos))) |
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// pin manipulation
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#define sbi(port, bit) (port) |= _BV(bit) |
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#define cbi(port, bit) (port) &= ~ _BV(bit) |
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#define set_bit(port, bit, value) (port) = (((port) & ~_BV(bit)) | ((value) << (bit))) |
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#define get_bit(port, bit) (((port) >> (bit)) & 1) |
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#define bus_pulse(port, bit) { sbi(port, bit); cbi(port, bit); } |
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#include <avr/io.h> |
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#include <util/delay_basic.h> |
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#include <stdint.h> |
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#include "ws_driver.h" |
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/** Raise the bus line */ |
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#define ws_high() (WS_PORT) |= (1 << WS_BIT) |
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/** Drop the bus line */ |
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#define ws_low() (WS_PORT) &= ~(1 << WS_BIT) |
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/* Convert nanoseconds to cycle count */ |
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#define ns2cycles(ns) ( (ns) / (1000000000L / (signed long) F_CPU) ) |
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/** Wait c cycles */ |
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#define delay_c(c) (((c) > 0) ? __builtin_avr_delay_cycles(c) : __builtin_avr_delay_cycles(0)) |
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/** Wait n nanoseconds, plus c cycles */ |
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#define delay_ns_c(ns, c) delay_c(ns2cycles(ns) + (c)) |
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void ws_show() |
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{ |
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ws_low(); |
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delay_ns_c(WS_T_LATCH, 0); |
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} |
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void ws_send_byte(uint8_t bb) |
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{ |
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for (int8_t i = 7; i >= 0; --i) { |
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if (bb & (1 << i)) { |
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// send ONE
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ws_high(); |
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delay_ns_c(WS_T_1H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_1L, -10); // compensation for overhead
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} else { |
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// send ZERO
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ws_high(); |
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delay_ns_c(WS_T_0H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_0L, -10); |
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} |
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} |
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} |
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void ws_send_rgb(uint8_t r, uint8_t g, uint8_t b) |
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{ |
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int8_t i; |
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// GREEN
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for (i = 7; i >= 0; --i) { |
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if (g & (1 << i)) { |
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// send ONE
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ws_high(); |
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delay_ns_c(WS_T_1H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_1L, -10); |
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} else { |
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// send ZERO
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ws_high(); |
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delay_ns_c(WS_T_0H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_0L, -10); |
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} |
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} |
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// RED
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for (i = 7; i >= 0; --i) { |
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if (r & (1 << i)) { |
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// send ONE
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ws_high(); |
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delay_ns_c(WS_T_1H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_1L, -10); |
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} else { |
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// send ZERO
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ws_high(); |
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delay_ns_c(WS_T_0H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_0L, -10); |
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} |
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} |
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// BLUE
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for (i = 7; i >= 0; --i) { |
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if (b & (1 << i)) { |
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// send ONE
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ws_high(); |
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delay_ns_c(WS_T_1H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_1L, -10); |
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} else { |
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// send ZERO
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ws_high(); |
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delay_ns_c(WS_T_0H, -2); |
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ws_low(); |
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delay_ns_c(WS_T_0L, -10); |
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} |
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} |
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} |
@ -0,0 +1,52 @@ |
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#pragma once |
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|
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// -- AVR GCC utility for driving WS2812B and similar RGB LED stripes --
|
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|
||||
// You must define the foillowing in config file or here:
|
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// * WS_PORT
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// * WS_BIT
|
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|
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#include "config.h" |
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|
||||
// The pin must be set to OUTPUT before using the output functions
|
||||
|
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|
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// --- timing constraints (NS) ---
|
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|
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#ifndef WS_T_1H |
||||
#define WS_T_1H 700 |
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#endif |
||||
|
||||
#ifndef WS_T_1L |
||||
#define WS_T_1L 150 |
||||
#endif |
||||
|
||||
#ifndef WS_T_0H |
||||
#define WS_T_0H 150 |
||||
#endif |
||||
|
||||
#ifndef WS_T_0L |
||||
#define WS_T_0L 700 |
||||
#endif |
||||
|
||||
#ifndef WS_T_LATCH |
||||
#define WS_T_LATCH 7000 |
||||
#endif |
||||
|
||||
|
||||
// More accurate timing
|
||||
// #define WS_T_1H 800
|
||||
// #define WS_T_1L 450
|
||||
// #define WS_T_0H 200
|
||||
// #define WS_T_0L 650
|
||||
// #define WS_T_LATCH 50000
|
||||
|
||||
|
||||
/** Latch and display the RGB values */ |
||||
void ws_show(void); |
||||
|
||||
/** Send one byte to the RGB strip */ |
||||
void ws_send_byte(uint8_t b); |
||||
|
||||
/** Send RGB color to the strip */ |
||||
void ws_send_rgb(uint8_t r, uint8_t g, uint8_t b); |
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Reference in new issue