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:
25:751c89f7e654
Parent:
24:feb1dae0403a
Child:
27:88c2abdf5eb9
--- a/main.cpp	Thu Jan 02 11:26:44 2014 +0000
+++ b/main.cpp	Thu Jan 02 19:42:14 2014 +0000
@@ -5,6 +5,7 @@
 
 // per LED: 3 * 20 mA = 60mA max
 // 60 LEDs: 60 * 60mA = 3600 mA max
+// 120 LEDs: 7200 mA max
 unsigned const nLEDs = MAX_LEDS_PER_STRIP;
 
 // I/O pin usage
@@ -13,24 +14,26 @@
 // PTD2 data output
 // PTD3 debug output
 
-unsigned const DATA_OUT_PIN = 2; // PTD2
+unsigned const DATA_OUT_PIN1 = 2; // PTD2
+unsigned const DATA_OUT_PIN2 = 3; // PTD3
 
 Serial pc(USBTX, USBRX);
+Timer timeRunning;
 
 TSISensor touchSensor;
 Ticker touchTicker;
 float touchPercentage;
-float const minBrite = 0.1;
-float const maxBrite = 0.7;
+unsigned frames;
+
+float const minBrite = 0.2;
+float const maxBrite = 0.5;
 float brite;
 
 void readTouchSensor()
 {
     touchPercentage *= 0.9;
     touchPercentage += touchSensor.readPercentage() * 0.1;
-    brite = maxBrite * touchPercentage;
-    if (brite < minBrite)
-        brite = minBrite;
+    brite = minBrite + (maxBrite - minBrite) * touchPercentage;
 }
 
 // @brief sets different colors in each of the LEDs of a strip
@@ -62,28 +65,28 @@
 int main(void)
 {
     pc.baud(115200);
-    WS2811 lightStrip(nLEDs, DATA_OUT_PIN);
+    WS2811 lightStrip1(nLEDs, DATA_OUT_PIN1);
+    WS2811 lightStrip2(nLEDs, DATA_OUT_PIN2);
 
     touchTicker.attach(&readTouchSensor, 0.1);
-    lightStrip.begin();
+    lightStrip1.begin();
+    lightStrip2.begin();
 
     float rainbowPeriod = 1 * 1.0e6; // usec
     float sat = 1.0;
 
-    Timer timeRunning;
     timeRunning.start();
     bool printed = false;
-    unsigned frames = 0;
 
     uint8_t r =0;
     uint8_t g =0;
     uint8_t b =0;
     for (;;) {
-        if (r < 255)
+        if (r < 40)
             r++;
-        else if (g < 255)
+        else if (g < 40)
             g++;
-        else if (b < 255)
+        else if (b < 40)
             b++;
         else {
             unsigned running = timeRunning.read_us();
@@ -92,7 +95,10 @@
         }
 
         wait(0.1);
-        showSolidColor(lightStrip, r, g, b);
+        showSolidColor(lightStrip1, r, g, b);
+        showSolidColor(lightStrip2, r, g, b);
+        WS2811::startDMA();
+
         frames++;
     }
 
@@ -106,7 +112,10 @@
             pc.printf("%u frames in %u usec = %u frames / sec\r\n", frames, running, frames * 1000000 / running);
             printed = true;
         }
-        showRainbow(lightStrip, sat, brite, hueShift);
+        showRainbow(lightStrip1, sat, brite, hueShift);
+        showRainbow(lightStrip2, sat, brite, hueShift + 0.5);
+        WS2811::startDMA();
+
         frames ++;
     }
 }