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keyboard-lamp

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-Subproject commit 4eaff23a1d463fd916f5a983fd202e0707c12af7

keyboard-lampd/Makefile

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+
+MCU	= attiny13
+
+F_CPU = 9600000
+
+LFUSE = 0x72
+HFUSE = 0xFF
+
+MAIN = main.c
+
+## If you've split your program into multiple files,
+## include the additional .c source (in same directory) here
+## (and include the .h files in your foo.c)
+LOCAL_SOURCE =
+
+## Here you can link to one more directory (and multiple .c files)
+# EXTRA_SOURCE_DIR = ../AVR-Programming-Library/
+EXTRA_SOURCE_DIR =
+EXTRA_SOURCE_FILES =
+
+
+
+##########------------------------------------------------------##########
+##########                 Programmer Defaults                  ##########
+##########          Set up once, then forget about it           ##########
+##########        (Can override.  See bottom of file.)          ##########
+##########------------------------------------------------------##########
+
+PROGRAMMER_TYPE = dragon_isp
+PROGRAMMER_ARGS =
+
+
+##########------------------------------------------------------##########
+##########                   Makefile Magic!                    ##########
+##########         Summary:                                     ##########
+##########             We want a .hex file                      ##########
+##########        Compile source files into .elf                ##########
+##########        Convert .elf file into .hex                   ##########
+##########        You shouldn't need to edit below.             ##########
+##########------------------------------------------------------##########
+
+## Defined programs / locations
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+AVRSIZE = avr-size
+AVRDUDE = sudo avrdude
+
+## Compilation options, type man avr-gcc if you're curious.
+CFLAGS = -std=gnu99 -mmcu=$(MCU) -DF_CPU=$(F_CPU)UL -Os -I. -I$(EXTRA_SOURCE_DIR)
+CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
+CFLAGS += -Wall -Wno-main
+CFLAGS += -g2 -ggdb
+CFLAGS += -ffunction-sections -fdata-sections -Wl,--gc-sections -Wl,--relax
+CFLAGS += -std=gnu99
+# CFLAGS += -lm
+## CFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm  ## for floating-point printf
+## CFLAGS += -Wl,-u,vfprintf -lprintf_min      ## for smaller printf
+
+## Lump target and extra source files together
+TARGET = $(strip $(basename $(MAIN)))
+SRC = $(TARGET).c
+EXTRA_SOURCE = $(addprefix $(EXTRA_SOURCE_DIR), $(EXTRA_SOURCE_FILES))
+SRC += $(EXTRA_SOURCE)
+SRC += $(LOCAL_SOURCE)
+
+## List of all header files
+HEADERS = $(SRC:.c=.h)
+
+## For every .c file, compile an .o object file
+OBJ = $(SRC:.c=.o)
+
+## Generic Makefile targets.  (Only .hex file is necessary)
+all: $(TARGET).hex size
+
+%.hex: %.elf
+	$(OBJCOPY) -R .eeprom -O ihex $< $@
+
+%.elf: $(SRC)
+	$(CC) $(CFLAGS) $(SRC) --output $@
+
+%.eeprom: %.elf
+	$(OBJCOPY) -j .eeprom --change-section-lma .eeprom=0 -O ihex $< $@
+
+debug:
+	@echo
+	@echo "Source files:"   $(SRC)
+	@echo "MCU, F_CPU, BAUD:"  $(MCU), $(F_CPU), $(BAUD)
+	@echo
+
+# Optionally create listing file from .elf
+# This creates approximate assembly-language equivalent of your code.
+# Useful for debugging time-sensitive bits,
+# or making sure the compiler does what you want.
+disassemble: $(TARGET).lst
+
+dis: disassemble
+
+eeprom: $(TARGET).eeprom
+
+%.lst: %.elf
+	$(OBJDUMP) -S $< > $@
+
+# Optionally show how big the resulting program is
+size:  $(TARGET).elf
+	$(AVRSIZE) -C --mcu=$(MCU) $(TARGET).elf
+
+clean:
+	rm -f $(TARGET).elf $(TARGET).hex $(TARGET).obj \
+	$(TARGET).o $(TARGET).d $(TARGET).eep $(TARGET).lst \
+	$(TARGET).lss $(TARGET).sym $(TARGET).map $(TARGET)~ \
+	$(TARGET).eeprom
+
+squeaky_clean:
+	rm -f *.elf *.hex *.obj *.o *.d *.eep *.lst *.lss *.sym *.map *~
+
+
+##########------------------------------------------------------##########
+##########              Programmer-specific details             ##########
+##########           Flashing code to AVR using avrdude         ##########
+##########------------------------------------------------------##########
+
+flash: $(TARGET).hex
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U flash:w:$<
+
+flash_eeprom: $(TARGET).eeprom
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -U eeprom:w:$<
+
+terminal:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nt
+
+
+flash_dragon_isp: PROGRAMMER_TYPE = dragon_isp
+flash_dragon_isp: PROGRAMMER_ARGS =
+flash_dragon_isp: flash
+
+
+##########------------------------------------------------------##########
+##########       Fuse settings and suitable defaults            ##########
+##########------------------------------------------------------##########
+
+## Generic
+FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m
+
+fuses:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) \
+	           $(PROGRAMMER_ARGS) $(FUSE_STRING)
+show_fuses:
+	$(AVRDUDE) -c $(PROGRAMMER_TYPE) -p $(MCU) $(PROGRAMMER_ARGS) -nv
+
+## Called with no extra definitions, sets to defaults
+set_default_fuses:  FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m
+set_default_fuses:  fuses

keyboard-lampd/main.c

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+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include <avr/eeprom.h>
+#include <util/delay.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "utils.h"
+
+/**
+ *                   +--u--+
+ *             RST --|     |-- Vcc
+ *  SAVE LED : PB3 --| t13 |-- PB2 : BTN: HIGH
+ *      N.C. : PB4 --|     |-- PB1 : BTN: LOW
+ *             GND --|     |-- PB0 : LED
+ *                   +-----+
+ */
+
+
+// pins config
+#define PIN_LED PB0
+#define PIN_LOW PB1
+#define PIN_HIGH PB2
+#define PIN_INDICATOR PB3
+
+#define btn_low() (0 == get_bit(PINB, PIN_LOW))
+#define btn_high() (0 == get_bit(PINB, PIN_HIGH))
+
+
+/** Initialize IO ports. */
+void SECTION(".init8") init_io(void)
+{
+	// set pin directions
+	DDRB = _BV(PIN_LED) | _BV(PIN_INDICATOR);
+
+	// pullups
+	PORTB = _BV(PIN_LOW) | _BV(PIN_HIGH);
+
+	// initialize the timer
+
+	// Fast PWM mode, Output to OC0A
+	OCR0A = 32;
+
+	TCCR0A = _BV(WGM00) | _BV(WGM01) | _BV(COM0A1);
+	TCCR0B = _BV(CS00);
+}
+
+
+#define BRIGHTNESS_LEN 121
+
+const uint8_t BRIGHTNESS[] PROGMEM = {
+	0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5,
+	6, 6, 6, 7, 7, 8, 8, 8, 9, 10, 10, 10, 11, 12, 13, 14, 14,
+	15, 16, 17, 18, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 34,
+	35, 36, 38, 39, 40, 41, 42, 44, 45, 46, 48, 49, 50, 52, 54,
+	56, 58, 59, 61, 63, 65, 67, 69, 71, 72, 74, 76, 78, 80, 82,
+	85, 88, 90, 92, 95, 98, 100, 103, 106, 109, 112, 116, 119,
+	122, 125, 129, 134, 138, 142, 147, 151, 156, 160, 165, 170,
+	175, 180, 185, 190, 195, 200, 207, 214, 221, 228, 234, 241,
+	248, 255
+};
+
+#define apply_brightness(level) OCR0A = pgm_read_byte( & BRIGHTNESS[level] )
+
+
+/**
+ * Main function
+ */
+void main()
+{
+	bool changed = 0;
+	bool changed_since_last_save = 0;
+
+	uint8_t savetimer = 0;
+
+	uint8_t level = eeprom_read_byte((uint8_t *) 0);
+
+	if (level >= BRIGHTNESS_LEN)
+		level = BRIGHTNESS_LEN - 1;
+	else if (level == 0)
+		level = BRIGHTNESS_LEN / 2;
+
+	apply_brightness(level);
+
+	while (1) {
+		if (btn_high() && level < BRIGHTNESS_LEN - 1) {
+			level++;
+			changed = 1;
+		}
+
+		if (btn_low() && level > 1) {
+			level--;
+			changed = 1;
+		}
+
+		if (changed) {
+			changed = 0;
+			savetimer = 0;
+			changed_since_last_save = 1;
+			apply_brightness(level);
+		}
+
+		_delay_ms(20);
+		savetimer++;
+
+		if (savetimer >= 50 && changed_since_last_save) {
+			changed_since_last_save = 0;
+			savetimer = 0;
+
+			sbi(PORTB, PIN_INDICATOR);
+			eeprom_update_byte((uint8_t*) 0, level);
+			_delay_ms(10);
+			cbi(PORTB, PIN_INDICATOR);
+		}
+	}
+}

keyboard-lampd/utils.h

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+#pragma once
+
+// general macros
+#define SECTION(pos) __attribute__((naked, used, section(pos)))
+
+
+// pin manipulation
+#define sbi(port, bit) (port) |= _BV(bit)
+#define cbi(port, bit) (port) &= ~ _BV(bit)
+
+#define set_bit(port, bit, value) (port) = (((port) & ~_BV(bit)) | ((value) << (bit)))
+#define get_bit(port, bit) (((port) >> (bit)) & 1)
+
+#define bus_pulse(port, bit) { sbi(port, bit); cbi(port, bit); }