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Dave Dribin ddribin

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ddribin / potentiometer-ebnf.txt
Last active November 20, 2024 16:06
Partial EBNF for Potentiometers
part = "PDB18", gangs, "-" pin-type, detent, shaft-length, shaft-style, "-", resistance, taper ;
gangs = "1" | "2" ;
pin-type =
"K" (* PC pns vertical 12.5mm *) |
"A" (* PC pins, vertical 18.0mm *) ;
detent =
"2" (* Center detents *) |
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ddribin / prime.swift
Created November 2, 2024 13:55
import Foundation
func isPrime(_ n: Int) -> Bool {
return !String(repeating: "1", count: n).contains(/^.?$|^(..+?)\1+$/)
}
func isPrimeAlt(_ n: Int) -> Bool {
let s = String(repeating: "1", count: n)
return !s.contains(/^.?$|^(..+?)\1+$/)
}
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ddribin / linear-fit.ipynb
Created February 18, 2024 19:01
Companion Jupyter notebook for my blog post, Linear Fit using Python and NumPy
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ddribin / next.log
Created June 26, 2021 20:06
servant Go Board
Info: constrained 'i_clk' to bel 'X0/Y8/io1'
Info: constrained 'q' to bel 'X13/Y6/io1'
Info: Packing constants..
Info: Packing IOs..
Info: Packing LUT-FFs..
Info: 277 LCs used as LUT4 only
Info: 124 LCs used as LUT4 and DFF
Info: Packing non-LUT FFs..
Info: 131 LCs used as DFF only
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ddribin / FIFO_2word_FWFT.sv
Created April 25, 2021 20:37
One word FIFO with first word feed through (FWFT)
// *****************************************************************
// *** FIFO_2word_FWFT.sv V1.0, August 15, 2020
// ***
// *** This 1 word FIFO with first word feed through (FWFT)
// *** This was designed to be backwards compatible with the
// *** FIFO_3word_0_latency.sv with the 'zero latency' disabled.
// *** written by Brian Guralnick.
// ***
// *** See the included 'FIFO_2word_FWFT.png' simulation for functionality.
// ***
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ddribin / reset.v
Created April 23, 2021 15:08
Asynchronous Assertion, Synchronous De-assertion
module reset_sync(
output reg rst_sync,
input clk, rst_n
);
reg R1;
always @(posedge clk or negedge rst_n)
if(!rst_n) begin
R1 <= 1'b0;
rst_sync <= 1'b0;
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ddribin / diagnostics-src.txt
Last active February 22, 2021 05:45
Attachments for https://stackoverflow.com/questions/66306945/vs-code-shows-red-squiggles-under-stdio-h-when-workspace-is-in-src-but-not
-------- Diagnostics - 2/21/2021, 11:22:54 PM
Version: 1.2.1
Current Configuration:
{
"name": "Mac",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [],
"macFrameworkPath": [
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ddribin / fakegcc-5
Last active January 21, 2021 15:03
A script to fake out Homebrew thinking gcc-5 is installed.
#!/bin/sh
if [ "$1" = "--version" ]; then
echo 'gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609'
exit 0
fi
exit 1
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ddribin / debug_log.lua
Last active May 25, 2020 15:39
-- debug logging
function log(...)
local arg={...}
local msg=""
for m in all(arg) do
msg=msg.._lstr(m)
end
_log(msg)
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ddribin / git-change-author.sh
Created May 12, 2020 16:59
#!/bin/sh
git filter-branch --env-filter '
OLD_EMAIL="your-old-email@example.com"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="your-correct-email@example.com"
if [ "$GIT_COMMITTER_EMAIL" = "$OLD_EMAIL" ]
then