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

Diff: main.cpp

Revision:
23:33df42ff2541
Parent:
22:abfed71656bd
Child:
24:feb1dae0403a
diff -r abfed71656bd -r 33df42ff2541 main.cpp
--- a/main.cpp	Thu Jan 02 02:31:24 2014 +0000
+++ b/main.cpp	Thu Jan 02 10:30:25 2014 +0000
@@ -2,8 +2,8 @@
 #include "WS2811.h"
 #include "Colors.h"
 
-// per LED: 3x 20 mA = 60mA
-// 4x full brightness = 0.33A at 5V.
+// per LED: 3 * 20 mA = 60mA max
+// 60 LEDs: 60 * 60mA = 3600 mA max
 unsigned const nLEDs = MAX_LEDS_PER_STRIP;
 
 // I/O pin usage
@@ -33,42 +33,31 @@
     strip.show();
 }
 
-static void showTestPattern(WS2811 &strip)
-{
-    unsigned nLEDs = strip.numPixels();
-    for (unsigned i = 0; i < nLEDs; i++)
-    {
-        strip.setPixelColor(i, LedStrip::Color(0xff,0,0xAA));
-    }
-    strip.show();
-}
-
 int main(void)
 {
     pc.baud(115200);
-    pc.printf("\r\nLEDs: %d\r\n", nLEDs);
-
     WS2811 lightStrip(nLEDs, DATA_OUT_PIN);
 
     lightStrip.begin();
 
-    float sat = 1.0;    // color saturation, 0.0 to 1.0
-    float brite = 0.1;  // 1.0 is full brightness, which is VERY bright!
-    float hueShift = 0.0;
-    float hueShiftIncrement = 1.0 / (360.0 / nLEDs);
+    float brite = 0.2;  // 1.0 is full brightness, which is VERY bright!
+    float rainbowPeriod = 1 * 1.0e6; // usec
+    float sat = 1.0;
 
-    Timer advance;
-    advance.start();
+    Timer timeRunning;
+    timeRunning.start();
+    bool printed = false;
+    unsigned frames = 0;
 
     for (;;) {
-        advance.reset();
-
-        // showTestPattern(lightStrip);
+        unsigned running = timeRunning.read_us();
+        float hueShift = running / rainbowPeriod;
+        if (!printed && running >= 10000000U) {
+            pc.printf("%u frames in %u usec = %u frames / sec\r\n", frames, running, frames * 1000000 / running);
+            printed = true;
+        }
         showRainbow(lightStrip, sat, brite, hueShift);
-        hueShift += hueShiftIncrement;
-
-        while (advance.read_ms() < 100)
-            __NOP();
-   }
+        frames ++;
+    }
 }