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

WS2811.cpp@17:b4e9d8f4baa9, 2013-12-05 (annotated)

Committer:
bikeNomad
Date:
Thu Dec 05 15:25:16 2013 +0000
Revision:
17:b4e9d8f4baa9
Parent:
16:5f75ea93f15d
Child:
20:b9d76e567637
renamed ws2812.* to ws2811.*

Who changed what in which revision?

UserRevisionLine numberNew contents of line
heroic 10:62368b801d16 1 // 800 KHz WS2811 driver, kinda.
heroic 8:e3249c2b7607 2 //
heroic 8:e3249c2b7607 3 // Parameterized and modified to use soft SPI.
heroic 8:e3249c2b7607 4 // Jas Strong <jasmine@electronpusher.org>
bikeNomad 17:b4e9d8f4baa9 5 // Modified to use hard SPI by Ned Konz <ned@bike-nomad.com>
heroic 8:e3249c2b7607 6 /*****************************************************************************/
heroic 8:e3249c2b7607 7
heroic 8:e3249c2b7607 8 #include "LedStrip.h"
heroic 8:e3249c2b7607 9 #include "WS2811.h"
heroic 8:e3249c2b7607 10
bikeNomad 17:b4e9d8f4baa9 11 WS2811::WS2811(int n, PinName mosi, PinName sclk) :
bikeNomad 17:b4e9d8f4baa9 12 LedStrip(n),
bikeNomad 17:b4e9d8f4baa9 13 spi(mosi, NC, sclk)
bikeNomad 17:b4e9d8f4baa9 14 {
bikeNomad 17:b4e9d8f4baa9 15 #ifdef TARGET_KL25Z
bikeNomad 17:b4e9d8f4baa9 16 spi.format(8, 3);
bikeNomad 17:b4e9d8f4baa9 17 #else
bikeNomad 17:b4e9d8f4baa9 18 spi.format(16, 3);
bikeNomad 17:b4e9d8f4baa9 19 #endif
bikeNomad 17:b4e9d8f4baa9 20 spi.frequency(800e3 * 16); // 12.8 MHz => 800KHz bit rate
heroic 8:e3249c2b7607 21 }
heroic 8:e3249c2b7607 22
heroic 8:e3249c2b7607 23 /*
heroic 8:e3249c2b7607 24 * These chips use a one-wire protocol based on a sort of NRZ signalling- jas.
heroic 8:e3249c2b7607 25 */
bikeNomad 17:b4e9d8f4baa9 26
bikeNomad 17:b4e9d8f4baa9 27 inline void WS2811::writebit(bool bit)
bikeNomad 17:b4e9d8f4baa9 28 {
bikeNomad 17:b4e9d8f4baa9 29 if (bit) {
bikeNomad 17:b4e9d8f4baa9 30 #ifdef TARGET_KL25Z
bikeNomad 17:b4e9d8f4baa9 31 spi.write(0xff); // 8 high
bikeNomad 17:b4e9d8f4baa9 32 spi.write(0x00); // 8 low
bikeNomad 17:b4e9d8f4baa9 33 #else
bikeNomad 17:b4e9d8f4baa9 34 spi.write(0xff00);
bikeNomad 17:b4e9d8f4baa9 35 #endif
bikeNomad 17:b4e9d8f4baa9 36 } else {
bikeNomad 17:b4e9d8f4baa9 37 #ifdef TARGET_KL25Z
bikeNomad 17:b4e9d8f4baa9 38 spi.write(0xe0); // 3 high, 5 low
bikeNomad 17:b4e9d8f4baa9 39 spi.write(0x00); // +8 low
bikeNomad 17:b4e9d8f4baa9 40 #else
bikeNomad 17:b4e9d8f4baa9 41 spi.write(0xe000);
bikeNomad 17:b4e9d8f4baa9 42 #endif
heroic 8:e3249c2b7607 43 }
heroic 8:e3249c2b7607 44 }
heroic 8:e3249c2b7607 45
bikeNomad 17:b4e9d8f4baa9 46 void WS2811::write(uint8_t byte)
bikeNomad 17:b4e9d8f4baa9 47 {
bikeNomad 17:b4e9d8f4baa9 48 writebit(byte & 0x80);
bikeNomad 17:b4e9d8f4baa9 49 writebit(byte & 0x40);
bikeNomad 17:b4e9d8f4baa9 50 writebit(byte & 0x20);
bikeNomad 17:b4e9d8f4baa9 51 writebit(byte & 0x10);
bikeNomad 17:b4e9d8f4baa9 52 writebit(byte & 0x08);
bikeNomad 17:b4e9d8f4baa9 53 writebit(byte & 0x04);
bikeNomad 17:b4e9d8f4baa9 54 writebit(byte & 0x02);
bikeNomad 17:b4e9d8f4baa9 55 writebit(byte & 0x01);
heroic 8:e3249c2b7607 56 }
heroic 8:e3249c2b7607 57
bikeNomad 17:b4e9d8f4baa9 58 void WS2811::begin(void)
bikeNomad 17:b4e9d8f4baa9 59 {
heroic 8:e3249c2b7607 60 blank();
heroic 8:e3249c2b7607 61 show();
heroic 8:e3249c2b7607 62 }
heroic 8:e3249c2b7607 63
bikeNomad 17:b4e9d8f4baa9 64 void WS2811::blank(void)
bikeNomad 17:b4e9d8f4baa9 65 {
bikeNomad 17:b4e9d8f4baa9 66 memset(pixels, 0x00, numPixelBytes());
heroic 8:e3249c2b7607 67 }
heroic 8:e3249c2b7607 68
bikeNomad 17:b4e9d8f4baa9 69 void WS2811::show(void)
bikeNomad 17:b4e9d8f4baa9 70 {
bikeNomad 17:b4e9d8f4baa9 71 uint16_t i, nl3 = numPixelBytes(); // 3 bytes per LED
heroic 8:e3249c2b7607 72 while (guardtime.read_us() < 50)
heroic 8:e3249c2b7607 73 /* spin */;
heroic 13:1f65330abe92 74 __disable_irq();
heroic 8:e3249c2b7607 75 for (i=0; i<nl3; i++ ) {
heroic 8:e3249c2b7607 76 write(pixels[i]);
heroic 8:e3249c2b7607 77 }
heroic 13:1f65330abe92 78 __enable_irq();
heroic 8:e3249c2b7607 79 guardtime.reset();
heroic 8:e3249c2b7607 80 }
heroic 8:e3249c2b7607 81
heroic 8:e3249c2b7607 82