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View edid-4k-samsung-tv.txt
Section "Monitor"
Identifier "SAMSUNG"
ModelName "SAMSUNG"
VendorName "SAM"
# Monitor Manufactured week 2 of 2014
# EDID version 1.3
# Digital Display
DisplaySize 1110 620
Gamma 2.20
Option "DPMS" "false"
esden / single-led-panel-pmod-phy.wd
Created Mar 19, 2019
Wavedrom listing describing the timing diagram of an iCEBreaker single Pmod LED Panel driver
View single-led-panel-pmod-phy.wd
{signal: [
{name: 'R', wave: 'x4343434343434343x..........', data: ['R1[0]','R0[0]','R1[1]','R0[1]','R1[2]','R0[2]','R1[3]','R0[3]','R1[4]','R0[4]','R1[5]','R0[5]','R1[6]','R0[6]','R1[7]','R0[7]']},
{name: 'G', wave: 'x4343434343434343x..........', data: ['G1[0]','G0[0]','G1[1]','G0[1]','G1[2]','G0[2]','G1[3]','G0[3]','G1[4]','G0[4]','G1[5]','G0[5]','G1[6]','G0[6]','G1[7]','G0[7]']},
{name: 'B', wave: 'x4343434343434343x..........', data: ['B1[0]','B0[0]','B1[1]','B0[1]','B1[2]','B0[2]','B1[3]','B0[3]','B1[4]','B0[4]','B1[5]','B0[5]','B1[6]','B0[6]','B1[7]','B0[7]']},
{name: 'SCLK', wave: 'hn.......h....', period:2, phase:0.5},
{name: 'LATCH', wave: '0........10...', period:2},
{name: 'BLANK', wave: 'x.......1..0..', period:2},
{name: 'ARST', wave: '1.............', period:2},
{name: 'ACLK', wave: '0........10...', period:2}
esden /
Last active Sep 1, 2019
FAQ: Collection of links and information about RGB LED Panels and FPGA

A common name for the interface is HUB75

The displays use shift registers for columns and two sets of row multiplexers.

Typical organization

32x32 panel

  • Organized in two halfs of 16x32 tiles
  • 32 bit long RGB column drive shift registers
  • 4 bit to 16 row drive demultiplexers
esden / led-demo.pcf
Last active Oct 25, 2018
This is the generated verilog from @scanlime icebreaker-icestudio-ledmatrix design af3b1559
View led-demo.pcf
# Code generated by Icestudio 0.4.0-dev
# Thu, 25 Oct 2018 18:32:14 GMT
set_io v5beaf0[4] 28
set_io v5beaf0[3] 31
set_io v5beaf0[2] 34
set_io v5beaf0[1] 38
set_io v5beaf0[0] 43
set_io vb20513[5] 3
set_io vb20513[4] 48
esden /
Last active May 8, 2019
Starting a new KiCad Project esden style.

Create a new directory:

mkdir myhardware-git
cd myhardware-git

Initialize git:

git init
esden / bmp_tpwr_en.scr
Last active Jul 14, 2018
Small gdb script to enable Black Magic Probe Target Power 'tpwr'.
View bmp_tpwr_en.scr
#!/usr/bin/env arm-none-eabi-gdb -nx -batch -x
# The Black Magic Probe has level shifter buffers on its frontend,
# this gdb script enables Black Magic Probe target power,
# this is needed if you are not providing reference voltage from your target.
# Do not run this script or enable target power if you have VREF connected.
# The BMP side TPWR is connected to the 3.3V regulator of the Black Magic Probe
# and it has no protections, so don't fry your target or Black Magic Probe by
# being hasty and not thinking about what you are doing. :D
esden / lisas2.h
Created Apr 22, 2018
Lisa/S V2.0 generated board file
View lisas2.h
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
esden / icebreaker-bitsy.pcf
Created Mar 29, 2018
iCEBreaker-bitsy Yosys PinConstraintFile
View icebreaker-bitsy.pcf
# 12 MHz clock
set_io -nowarn CLK 35
set_io -nowarn USB_DP 43
set_io -nowarn USB_DN 42
set_io -nowarn UPB_DET 38
# LEDs and Button
set_io -nowarn BTN_N 10
View bom2groupedtsv.xsl
<!--XSL style sheet to convert EESCHEMA XML Partlist Format to grouped TSV BOM Format
Copyright (C) 2014, Wolf Walter.
Copyright (C) 2013, Stefan Helmert.
GPL v2.
Generation of Digi-Key ordering system compatible BOM
How to use this is explained in eeschema.pdf chapter 14. You enter a command line into the
netlist exporter using a new (custom) tab in the netlist export dialog. The command is
You can’t perform that action at this time.