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// Example Arduino sketch shows how to make a "rotor" of LEDs that light up,
// then fade away as the rotor passes them by.
// See https://mstdn.social/@alpenglow/111722310220283286

#define ROTOR_LED_COUNT 10
#define ROTOR_UPDATE_MSEC 1
#define ROTOR_ADVANCE_MSEC 100
#define ROTOR_MAX_BRIGHTNESS 255
#define ROTOR_MIN_BRIGHTNESS 0

kbob

#!/usr/bin/env python3

from itertools import count

# This is stable up to about x=34.
# Above that, reimplement with rational arithmetic.

def Si(x):
    """Sine integral.  Numerically stable up to about x=34."""
    sign = +1

kbob

#!/usr/bin/env python3

from functools import reduce
from itertools import count, cycle, islice, repeat

def fizzbuzz(*args):

    class Fizz(int):
        __add__  = lambda fi, z: z
        __call__ = lambda b, u, z: z(u)

kbob

from nmigen import *
from nmigen_boards.icebreaker import ICEBreakerPlatform
from nmigen.cli import main

class Foo(Elaboratable):

    def __init__(self):
        self.bar = Signal(signed(24))

    def elaborate(self, platform):

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"""
Function decorator with optional keyword arguments.
"""

from functools import wraps

def decorate(func=None, kind=''):
    if func is None:
        # was called pre-decoration.  Return anonymous decorator.
        return lambda f: decorate(f, kind)

kbob

#!/usr/bin/env shaderbox

#define TAU 6.283185307179586

#define A vec3(0.5, 0.5, 0.5)
#define B vec3(0.5, 0.5, 0.5)
#define C vec3(1.0, 0.7, 0.4)
#define D vec3(0.0, 0.15, 0.20)

vec3 pal(in float t, in vec3 a, in vec3 b, in vec3 c, in vec3 d)

kbob

`default_nettype none

module blinky (CLK, LED1);
    input wire CLK;
    output wire LED1;
    parameter WIDTH = 24;
    parameter CLK_HZ = 12_000_000;

    reg [WIDTH-1:0] counter;
    reg [7:0] led1;

kbob

#[macro_use]
extern crate vulkano;
extern crate vulkano_shaders;
extern crate winit;
extern crate vulkano_win;

use vulkano::buffer::{CpuAccessibleBuffer, CpuBufferPool, BufferUsage};
use vulkano::command_buffer::{AutoCommandBufferBuilder, DynamicState};
use vulkano::descriptor::descriptor_set::PersistentDescriptorSet;
use vulkano::device::{Device, DeviceExtensions};

kbob

# 12 MHz clock
set_io -nowarn CLK        35

# RS232
set_io -nowarn RX          6
set_io -nowarn TX          9

# LEDs and Button
set_io -nowarn BTN_N      10
set_io -nowarn LEDR_N     11

kbob

`default_nettype none

`define W 24

module top (
        input  CLK,
        output LED1,
        output LED2,
        output LED3,
        output LED4,