alivecolors2

pull/1/head
Ondřej Hruška 8 years ago
parent feb4e55bbd
commit ae09fca518
  1. 166
      projects/alive-color-whell/Makefile
  2. 7
      projects/alive-color-whell/README.md
  3. 42
      projects/alive-color-whell/lib/arduino_pins.h
  4. 40
      projects/alive-color-whell/lib/calc.h
  5. 59
      projects/alive-color-whell/lib/colors.h
  6. 104
      projects/alive-color-whell/lib/debounce.h
  7. 6
      projects/alive-color-whell/lib/meta.h
  8. 18
      projects/alive-color-whell/lib/nsdelay.h
  9. 107
      projects/alive-color-whell/lib/pins.h
  10. 77
      projects/alive-color-whell/lib/ws2812.h
  11. 116
      projects/alive-color-whell/main.c

@ -0,0 +1,166 @@
MCU = atmega328p
F_CPU = 16000000
LFUSE = 0xFF
HFUSE = 0xDE
EFUSE = 0x05
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.) ##########
##########------------------------------------------------------##########
#19200
PROGRAMMER_TYPE = arduino
PROGRAMMER_ARGS = -b 57600 -P /dev/ttyUSB0
##########------------------------------------------------------##########
########## 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 -I. -I$(EXTRA_SOURCE_DIR)
CFLAGS += -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
CFLAGS += -Wall -Wno-main -Wno-strict-prototypes -Wno-comment
CFLAGS += -g2 -Wextra -pedantic -Wfatal-errors
CFLAGS += -ffunction-sections -fdata-sections -Wl,--gc-sections -Wl,--relax
CFLAGS_BUILD = $(CFLAGS) -Os
# 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)))
SRC1 = $(TARGET).c
SRC = $(SRC1)
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
pre: $(TARGET).pre
%.hex: %.elf
$(OBJCOPY) -R .eeprom -O ihex $< $@
%.elf: $(SRC)
$(CC) $(CFLAGS_BUILD) $(SRC) --output $@
%.pre: $(SRC1)
$(CC) $(CFLAGS) -E $(SRC1) --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
lst: 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) $(PROGRAMMER_ARGS) -nt
flash_arduino: PROGRAMMER_TYPE = arduino
flash_arduino: PROGRAMMER_ARGS =
flash_arduino: flash
flash_dragon_isp: PROGRAMMER_TYPE = dragon_isp
flash_dragon_isp: PROGRAMMER_ARGS =
flash_dragon_isp: flash
##########------------------------------------------------------##########
########## Fuse settings and suitable defaults ##########
##########------------------------------------------------------##########
## Generic
FUSE_STRING = -U lfuse:w:$(LFUSE):m -U hfuse:w:$(HFUSE):m -U efuse:w:$(EFUSE):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:$(HFUSE):m -U efuse:w:$(EFUSE):m
set_default_fuses: fuses

@ -0,0 +1,7 @@
Alive color wheel
=================
This is an animation for WS2812B RGB strip with 72 LEDs, but can be adjusted to smaller.
See video: [https://www.youtube.com/watch?v=pgHmZdYfbz8](https://www.youtube.com/watch?v=pgHmZdYfbz8)

@ -0,0 +1,42 @@
#pragma once
/**
Pin definitions for Arduino (Pro Mini with ATmega328P)
*/
#include "pins.h"
#define D0 D,0
#define D1 D,1
#define D2 D,2
#define D3 D,3
#define D4 D,4
#define D5 D,5
#define D6 D,6
#define D7 D,7
#define D8 B,0
#define D9 B,1
#define D10 B,2
// MOSI MISO SCK - not good for input
#define D11 B,3
#define D12 B,4
#define D13 B,5
#define D14 C,0
#define D15 C,1
#define D16 C,2
#define D17 C,3
#define D18 C,4
#define D19 C,5
#define D20 C,6
#define D21 C,7
#define A0 C,0
#define A1 C,1
#define A2 C,2
#define A3 C,3
#define A4 C,4
#define A5 C,5
#define A6 C,6
#define A7 C,7

@ -0,0 +1,40 @@
#pragma once
/**
General purpose calculation and bit manipulation utilities.
*/
// if max, go to zero. Else increment.
#define inc_wrap(var, min, max) do { if ((var) >= (max)) { (var)=min; } else { (var)++; } } while(0)
// If zero, go to max. Else decrement,
#define dec_wrap(var, min, max) do { if ((var) > min) { (var)--; } else { (var)=(max); } } while(0)
// === general bit manipulation with register ===
#define sbi(reg, bit) do { (reg) |= (1 << (uint8_t)(bit)); } while(0)
#define cbi(reg, bit) do { (reg) &= ~(1 << (uint8_t)(bit)); } while(0)
#define read_bit(reg, bit) ((((uint8_t)(reg)) >> (uint8_t)(bit)) & 0x1)
#define get_bit(reg, bit) read_bit(reg, bit)
#define write_bit(reg, bit, value) do { (reg) = ((reg) & ~(1 << (uint8_t)(bit))) | (((uint8_t)(value) & 0x1) << (uint8_t)(bit)); } while(0)
#define set_bit(reg, bit, value) write_bit(reg, bit, value)
#define toggle_bit(reg, bit) do { (reg) ^= (1 << (uint8_t)(bit)); } while(0)
// general pin manipulation - with pointer to register
#define sbi_p(reg_p, bit) do { (*(reg_p)) |= (1 << (uint8_t)(bit)); } while(0)
#define cbi_p(reg_p, bit) do { (*(reg_p)) &= ~(1 << (uint8_t)(bit)); } while(0)
#define read_bit_p(reg_p, bit) ((*(reg_p) >> (uint8_t)(bit)) & 0x1)
#define get_bit_p(reg_p, bit) read_bit_p(reg_p, bit)
#define write_bit_p(reg_p, bit, value) do { *(reg_p) = (*(reg_p) & ~(1 << ((uint8_t)(bit) & 0x1))) | (((uint8_t)(value) & 0x1) << (uint8_t)(bit)); } while(0)
#define set_bit_p(reg, bit, value) write_bit_p(reg_p, bit, value)
#define toggle_bit_p(reg_p, bit) do { *(reg_p) ^= (1 << (uint8_t)(bit)); } while(0)
// Check if value is in range A..B or B..A
#define in_range(x, low, high) (((low) < (high)) && ((x) > (low) && (x) < (high))) || (((low) > (high)) && ((x) < (low) || (x) > (high)))
// Check if value is in range A..B. If B < A, matches all outside B..A
#define in_range_wrap(x, low, high) (((low) < (high)) && ((x) > (low) && (x) < (high))) || (((low) > (high)) && ((x) > (low) || (x) < (high)))

@ -0,0 +1,59 @@
#pragma once
/*
Some useful utilities for RGB color manipulation
*/
typedef struct {
uint8_t r;
uint8_t g;
uint8_t b;
} xrgb_t;
typedef uint32_t rgb24_t;
typedef uint16_t rgb16_t;
typedef uint16_t rgb12_t;
typedef uint8_t rgb6_t;
#define xrgb(rr, gg, bb) ((xrgb_t) { .r = ((uint8_t)(rr)), .g = ((uint8_t)(gg)), .b = ((uint8_t)(bb)) })
#define xrgb_r(c) ((uint8_t)(c.r))
#define xrgb_g(c) ((uint8_t)(c.g))
#define xrgb_b(c) ((uint8_t)(c.b))
#define xrgb_rgb24(c) ((((rgb24_t)c.r) << 16) | (((rgb24_t)c.g) << 8) | (((rgb24_t)c.b)))
#define xrgb_rgb15(c) (((((rgb15_t)c.r) & 0xF8) << 7) | ((((rgb15_t)c.g) & 0xF8) << 2) | ((((rgb15_t)c.b) & 0xF8) >> 3))
#define xrgb_rgb12(c) (((((rgb12_t)c.r) & 0xF0) << 4) | ((((rgb12_t)c.g) & 0xF0)) | ((((rgb12_t)c.b) & 0xF0) >> 4))
#define xrgb_rgb6(c) (((((rgb6_t)c.r) & 0xC0) >> 2) | ((((rgb6_t)c.g) & 0xC0) >> 4) | ((((rgb6_t)c.b) & 0xC0) >> 6))
#define rgb24(r,g,b) ((rgb24_t) (((((rgb24_t)r) & 0xFF) << 16) | ((((rgb24_t)g) & 0xFF) << 8) | (((rgb24_t)b) & 0xFF)))
#define rgb24_r(c) ((((rgb24_t) (c)) >> 16) & 0xFF)
#define rgb24_g(c) ((((rgb24_t) (c)) >> 8) & 0xFF)
#define rgb24_b(c) ((((rgb24_t) (c)) >> 0) & 0xFF)
#define rgb24_xrgb(c) xrgb(rgb24_r(c), rgb24_g(c), rgb24_b(c))
#define rgb15(r,g,b) ((rgb16_t) (((r & 0x1F) << 10) | ((g & 0x1F) << 5) | (b & 0x1F)))
#define rgb15_r(c) ((((rgb15_t) (c)) & 0x7C00) >> 7)
#define rgb15_g(c) ((((rgb15_t) (c)) & 0x3E0) >> 2)
#define rgb15_b(c) ((((rgb15_t) (c)) & 0x1F) << 3)
#define rgb15_xrgb(c) xrgb(rgb15_r(c), rgb15_g(c), rgb15_b(c))
#define rgb15_rgb24(c) rgb24(rgb15_r(c), rgb15_g(c), rgb15_b(c))
#define rgb12(r,g,b) ((rgb12_t) (((r & 0xF) << 8) | ((g & 0xF) << 4) | (b & 0xF)))
#define rgb12_r(c) ((((rgb12_t) (c)) & 0xF00) >> 4)
#define rgb12_g(c) (((rgb12_t) (c)) & 0xF0)
#define rgb12_b(c) (((r(rgb12_t) (c)gb) & 0x0F) << 4)
#define rgb12_xrgb(c) xrgb(rgb12_r(c), rgb12_g(c), rgb12_b(c))
#define rgb12_rgb24(c) rgb24(rgb12_r(c), rgb12_g(c), rgb12_b(c))
#define rgb6(r,g,b) ((rgb6_t) (((r & 3) << 4) | ((g & 3) << 2) | (b & 3)))
#define rgb6_r(c) ((((rgb6_t) (c)) & 0x30) << 2)
#define rgb6_g(c) ((((rgb6_t) (c)) & 0xC) << 4)
#define rgb6_b(c) ((((rgb6_t) (c)) & 0x3) << 6)
#define rgb6_xrgb(c) xrgb(rgb6_r(c), rgb6_g(c), rgb6_b(c))
#define rgb6_rgb24(c) rgb24(rgb6_r(c), rgb6_g(c), rgb6_b(c))
#define add_xrgb(x, y) ((xrgb_t) { (((y).r > (255 - (x).r)) ? 255 : ((x).r + (y).r)), (((y).g > (255 - (x).g)) ? 255 : ((x).g + (y).g)), (((y).b > 255 - (x).b) ? 255 : ((x).b + (y).b)) })

@ -0,0 +1,104 @@
#pragma once
/**
An implementation of button debouncer.
First, the system must be initialized - even before including:
#define DEBO_CHANNELS 2
#define DEBO_TICKS 5
#inclue "lib/debounce.h"
A pin is registered like this:
#define BTN1 B,0
#define BTN2 B,1
debo_add(BTN0); // The function returns number assigned to the pin (0, 1, ...)
debo_add_rev(BTN1); // active low
debo_register(&PINB, PB2, 0); // direct access - register, pin & invert
Then periodically call the tick function (perhaps in a timer interrupt):
debo_tick();
To check if input is active, use
debo_get_pin(0); // state of input registered as #0
debo_get_pin(1); // state of input registered as #1
*/
#include <avr/io.h>
#include <stdbool.h>
#include "calc.h"
#include "pins.h"
// Number of pins to debounce
#ifndef DEBO_CHANNELS
# error "DEBO_CHANNELS not defined!"
#endif
#ifndef DEBO_TICKS
# warning "DEBO_TICKS not defined, defaulting to 5!"
# define DEBO_TICKS 5
#endif
/* Internal deboucer entry */
typedef struct {
PORT_P reg;
uint8_t bit;
uint8_t count;
} debo_slot_t;
/** Debounce data array */
debo_slot_t debo_slots[DEBO_CHANNELS];
uint8_t debo_next_slot = 0;
/** Define a debounced pin (must be IO!) */
#define debo_add_rev(io) debo_register(&io2pin(io_pack(io)), io2n(io_pack(io)), 1)
#define debo_add(io) debo_register(&io2pin(io_pack(io)), io2n(io_pack(io)), 0)
uint8_t debo_register(PORT_P reg, uint8_t bit, bool invert)
{
debo_slots[debo_next_slot] = (debo_slot_t){
.reg = reg,
.bit = bit | ((invert & 1) << 7) | (get_bit_p(reg, bit) << 6), // bit 7 = invert, bit 6 = state
.count = 0,
};
return debo_next_slot++;
}
/** Check debounced pins, should be called periodically. */
void debo_tick()
{
for (uint8_t i = 0; i < debo_next_slot; i++) {
// current pin value (right 3 bits, xored with inverse bit)
bool value = get_bit_p(debo_slots[i].reg, debo_slots[i].bit & 0x7);
if (value != get_bit(debo_slots[i].bit, 6)) {
// different pin state than last recorded state
if (debo_slots[i].count < DEBO_TICKS) {
debo_slots[i].count++;
} else {
// overflown -> latch value
set_bit(debo_slots[i].bit, 6, value); // set state bit
debo_slots[i].count = 0;
}
} else {
debo_slots[i].count = 0; // reset the counter
}
}
}
/** Get a value of debounced pin */
#define debo_get_pin(i) (get_bit(debo_slots[i].bit, 6) ^ get_bit(debo_slots[i].bit, 7))
//(get_bit(debo_slots[i].bit, 6) ^ get_bit(debo_slots[i].bit, 7))

@ -0,0 +1,6 @@
#pragma once
/** Weird constructs for the compiler */
// general macros
#define SECTION(pos) __attribute__((naked, used, section(pos)))

@ -0,0 +1,18 @@
#pragma once
/**
Functions for precise delays (nanoseconds / cycles)
*/
#include <avr/io.h>
#include <util/delay_basic.h>
#include <stdint.h>
/* Convert nanoseconds to cycle count */
#define ns2cycles(ns) ( (ns) / (1000000000L / (signed long) F_CPU) )
/** Wait c cycles */
#define delay_c(c) (((c) > 0) ? __builtin_avr_delay_cycles(c) : __builtin_avr_delay_cycles(0))
/** Wait n nanoseconds, plus c cycles */
#define delay_ns_c(ns, c) delay_c(ns2cycles(ns) + (c))

@ -0,0 +1,107 @@
#pragma once
/**
This file provides macros for pin manipulation.
You can define your application pins like so:
// Led at PORTB, pin 1
#define LED B,1
// Switch at PORTD, pin 7
#define SW1 D,7
Now you can use macros from this file to wirh with the pins, eg:
as_output(LED);
as_input(SW1);
pullup_on(SW1);
toggle_pin(LED);
while (pin_is_low(SW1));
- The macros io2XXX() can be used to get literal name of register associated with the pin.
- io2n() provides pin number.
- The XXX_aux() macros are internal and should not be used elsewhere.
- The io_pack() macro is used to pass pin (io) to other macro without expanding it.
*/
#include <avr/io.h>
#include "calc.h"
// Get particular register associated with the name X (eg. D -> PORTD)
#define reg_ddr(X) DDR ## X
#define reg_port(X) PORT ## X
#define reg_pin(X) PIN ## X
#define io2ddr_aux(reg, bit) reg_ddr(reg)
#define io2ddr(io) io2ddr_aux(io)
#define io2port_aux(reg, bit) reg_port(reg)
#define io2port(io) io2port_aux(io)
#define io2pin_aux(reg, bit) reg_pin(reg)
#define io2pin(io) io2pin_aux(io)
#define io2n_aux(reg, bit) bit
#define io2n(io) io2n_aux(io)
#define io_pack(port, bit) port, bit
// pointer to port
typedef volatile uint8_t* PORT_P;
// number of bit in port
typedef uint8_t BIT_N;
// === pin manipulation ===
#define set_pin_aux(port, bit) sbi(reg_port(port), (bit))
#define clear_pin_aux(port, bit) cbi(reg_port(port), (bit))
#define read_pin_aux(port, bit) get_bit(reg_pin(port), (bit))
#define write_pin_aux(port, bit, value) set_bit(reg_port(port), (bit), (value))
#define toggle_pin_aux(port, bit) sbi(reg_pin(port), (bit))
#define pin_up(io) set_pin_aux(io)
#define pin_high(io) set_pin_aux(io)
#define pin_down(io) clear_pin_aux(io)
#define pin_low(io) clear_pin_aux(io)
#define get_pin(io) read_pin_aux(io)
#define read_pin(io) read_pin_aux(io)
#define pin_is_low(io) !read_pin_aux(io)
#define pin_is_high(io) read_pin_aux(io)
#define set_pin(io, value) write_pin_aux(io, (value))
#define write_pin(io, value) write_pin_aux(io, (value))
#define toggle_pin(io) toggle_pin_aux(io)
// setting pin direction
#define as_input_aux(port, bit) cbi(reg_ddr(port), (bit))
#define as_output_aux(port, bit) sbi(reg_ddr(port), (bit))
#define set_dir_aux(port, bit, dir) write_bit(reg_ddr(port), (bit), (dir))
#define as_input(io) as_input_aux(io)
#define as_input_pu(io) do { as_input_aux(io); pullup_enable_aux(io); } while(0)
#define as_output(io) as_output_aux(io)
#define set_dir(io, dir) set_dir_aux(io, (dir))
// setting pullup
#define pullup_enable_aux(port, bit) sbi(reg_port(port), (bit))
#define pullup_disable_aux(port, bit) cbi(reg_port(port), (bit))
#define set_pullup_aux(port, bit, on) write_bit(reg_port(port), (bit), (on))
#define pullup_enable(io) pullup_enable_aux(io)
#define pullup_on(io) pullup_enable_aux(io)
#define pullup_disable(io) pullup_disable_aux(io)
#define pullup_off(io) pullup_disable_aux(io)
#define set_pullup(io, on) set_pullup_aux(io, on)

@ -0,0 +1,77 @@
#pragma once
/**
Utils for driving a WS2812 (WS2812B) RGB LED strips.
It's implemented as macros to avoid overhead when passing values, and to
enable driving multiple strips at once. There is over 1us of free time between
the colors, which can be used for some processing or color computation.
To avoid bloating your code, try to reduce the nuýmber of invocations -
compute color and then send it.
*/
#include <avr/io.h>
#include "pins.h"
#include "nsdelay.h"
#include "colors.h"
/* Driver code for WS2812B */
// --- timing constraints (NS) ---
#ifndef WS_T_1H
# define WS_T_1H 700
#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
/** Wait long enough for the colors to show */
#define ws_show() do { delay_ns_c(WS_T_LATCH, 0); } while(0)
/** Send one byte to the RGB strip */
#define ws_send_byte(io, bb) do { \
for (volatile int8_t __wsba_i = 7; __wsba_i >= 0; --__wsba_i) { \
if ((bb) & (1 << __wsba_i)) { \
pin_high(io_pack(io)); delay_ns_c(WS_T_1H, -2); \
pin_low(io_pack(io)); delay_ns_c(WS_T_1L, -10); \
} else { \
pin_high(io_pack(io)); delay_ns_c(WS_T_0H, -2); \
pin_low(io_pack(io)); delay_ns_c(WS_T_0L, -10); \
} \
} \
} while(0)
/** Send R,G,B color to the strip */
#define ws_send_rgb(io, r, g, b) do { \
ws_send_byte(io_pack(io), g); \
ws_send_byte(io_pack(io), r); \
ws_send_byte(io_pack(io), b); \
} while(0)
/** Send a RGB struct */
#define ws_send_xrgb(io, xrgb) ws_send_rgb(io_pack(io), (xrgb).r, (xrgb).g, (xrgb).b)
/** Send color hex */
#define ws_send_rgb24(io, rgb) ws_send_rgb(io_pack(io), rgb24_r(rgb), rgb24_g(rgb), rgb24_b(rgb))
#define ws_send_rgb15(io, rgb) ws_send_rgb(io_pack(io), rgb15_r(rgb), rgb15_g(rgb), rgb15_b(rgb))
#define ws_send_rgb12(io, rgb) ws_send_rgb(io_pack(io), rgb12_r(rgb), rgb12_g(rgb), rgb12_b(rgb))
#define ws_send_rgb6(io, rgb) ws_send_rgb(io_pack(io), rgb6_r(rgb), rgb6_g(rgb), rgb6_b(rgb))

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#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdbool.h>
#include <stdint.h>
#include "lib/meta.h"
#include "lib/arduino_pins.h"
#include "lib/calc.h"
#include "lib/colors.h"
#include "lib/ws2812.h"
#define WS1 D10
void render();
void init_karts();
void move_karts();
void SECTION(".init8") init_io()
{
// led strip data
as_output(WS1);
// setup timer 10 ms
TCCR0A = _BV(WGM01); // CTC
TCCR0B = _BV(CS02) | _BV(CS00); // prescaler 512
OCR0A = 100; // interrupt every 10 ms 156
sbi(TIMSK0, OCIE0A);
sei();
}
/** timer 0 interrupt vector */
ISR(TIMER0_COMPA_vect)
{
move_karts();
render();
}
/** Unsigned int range struct */
typedef struct {
uint8_t a;
uint8_t b;
int8_t dir;
uint8_t steptime;
uint8_t stepcnt;
xrgb_t color;
} kart_t;
#define BLACK xrgb(0,0,0)
#define karts_len 6
#define screen_len 72
kart_t karts[karts_len];
xrgb_t screen[screen_len];
void init_karts()
{
karts[0] = (kart_t) { .a=0, .b=17, .dir=1, .steptime=2, .stepcnt=0, .color=xrgb(50, 0, 0) };
karts[1] = (kart_t) { .a=10, .b=19, .dir=1, .steptime=3, .stepcnt=0, .color=xrgb(0, 50, 0) };
karts[2] = (kart_t) { .a=20, .b=29, .dir=1, .steptime=7, .stepcnt=0, .color=xrgb(0, 0, 50) };
karts[3] = (kart_t) { .a=40, .b=52, .dir=-1, .steptime=2, .stepcnt=0, .color=xrgb(50, 0, 50) };
karts[4] = (kart_t) { .a=50, .b=69, .dir=-1, .steptime=11, .stepcnt=0, .color=xrgb(0, 20, 20) };
karts[5] = (kart_t) { .a=25, .b=37, .dir=-1, .steptime=1, .stepcnt=0, .color=xrgb(60, 30, 0) };
karts[5] = (kart_t) { .a=17, .b=25, .dir=1, .steptime=5, .stepcnt=0, .color=xrgb(25, 25, 0) };
}
void move_karts()
{
for (uint8_t j = 0; j < karts_len; j++) {
if (++karts[j].stepcnt >= karts[j].steptime) {
// move yo ass
if (karts[j].dir > 0) {
inc_wrap(karts[j].a, 0, screen_len - 1);
inc_wrap(karts[j].b, 0, screen_len - 1);
} else {
dec_wrap(karts[j].a, 0, screen_len - 1);
dec_wrap(karts[j].b, 0, screen_len - 1);
}
karts[j].stepcnt = 0;
}
}
}
void render()
{
// build the screen
// for each pixel
for (uint8_t i = 0; i < screen_len; i++) {
screen[i] = BLACK;
// for each kart
for (uint8_t j = 0; j < karts_len; j++) {
if (in_range_wrap(i, karts[j].a, karts[j].b)) {
screen[i] = add_xrgb(screen[i], karts[j].color);
}
}
}
for (uint8_t i = 0; i < screen_len; i++) {
ws_send_xrgb(WS1, screen[i]);
}
}
void main()
{
init_karts();
while(1) {} // Timer interrupts do the rest
}
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