Ned Konz / Mbed 2 deprecated Multi_WS2811_test

Test program for my Multi_WS2811 library that started out as a fork of heroic/WS2811. My library uses hardware DMA on the FRDM-KL25Z to drive up to 16 strings of WS2811 or WS2812 LEDs in parallel.

Dependencies:   Multi_WS2811 mbed MMA8451Q

Fork of WS2811 by Heroic Robotics

NOTE: I have accidentally pushed changes for another fork of this program that I used in the recent Georgetown Carnival Power Tool Races. When I get some time, I will restore the test program to its original glory.

You can see my power tool racer (Nevermore's Revenge) here

/media/uploads/bikeNomad/img_0482.jpg

This tests my FRDM-KL25Z multi-string WS2811/WS2812 library. It uses the accelerometer to change the rainbow phase on two strings of LEDs as well as the touch sense to change brightness.

A video of this program in operation is here.

Here is the library that I developed to run the LEDs:

Import libraryMulti_WS2811

Library allowing up to 16 strings of 60 WS2811 or WS2812 LEDs to be driven from a single FRDM-KL25Z board. Uses hardware DMA to do a full 800 KHz rate without much CPU burden.

Last commit 13 Jun 2015 by Ned Konz

Files at this revision

API Documentation at this revision

Revision 10:62368b801d16, committed 2013-02-19

Comitter:
heroic
Date:
Tue Feb 19 08:39:39 2013 +0000
Parent:
9:dd524af149e6
Child:
11:d127f93be182
Commit message:
Add ability to slow down ws2811 communications

Changed in this revision

WS2811.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/WS2811.cpp	Wed Nov 14 05:06:29 2012 +0000
+++ b/WS2811.cpp	Tue Feb 19 08:39:39 2013 +0000
@@ -1,4 +1,4 @@
-// WS2811 driver, kinda.
+// 800 KHz WS2811 driver, kinda.
 //
 // Parameterized and modified to use soft SPI.
 // Jas Strong <jasmine@electronpusher.org>
@@ -7,6 +7,9 @@
 #include "LedStrip.h"
 #include "WS2811.h"
 
+extern int onewire_speed_multiplier;   // speed setting for ws2811 et al.
+
+
 WS2811::WS2811(PinName dataPin, PinName clockPin, int n) :
     dat(dataPin),
     clk(clockPin) {
@@ -22,7 +25,7 @@
         /* do nothing */;
     i=guardtime.read_us();
     printf("ws2811:  1000 iters took %d usec.\n", i);
-    bogocal = (1000 / (i*2.4)); // iterations per bitcell (417 nsec)
+    bogocal = (1000 / (onewire_speed_multiplier * i * 2.4)); // iterations per bitcell (417 nsec)
     printf("ws2811:  calibrating to %d bogojiffies.\n", bogocal);
 }