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: WS2811.h

Revision:
20:b9d76e567637
Parent:
17:b4e9d8f4baa9
Child:
21:4541da183397
--- a/WS2811.h	Fri Dec 06 06:58:12 2013 +0000
+++ b/WS2811.h	Sat Dec 21 04:32:21 2013 +0000
@@ -16,27 +16,35 @@
 #define MBED_WS2811_H
 
 #ifdef TARGET_KL25Z
+// SPI0 max frequency = fBUS/2 = 24MHz
+// SPI1 max frequency = fSYS/2 = 12MHz
+// but watch out for SPI1 errata using DMA!
+// SPI0: PTA16, PTA17, PTC6, PTC7, PTD2, PTD3
+// SPI1: PTB16, PTB17, PTD6, PTD7, PTE1, PTE3
 #define MOSI_DEFAULT PTD2
-#define SCLK_DEFAULT PTC5
+// SPI0: PTA15, PTC5, PTD1/ LED_BLUE
+// SPI1: PTB11, PTD5, PTE2
+#define SCLK_DEFAULT PTD1
 #else
 #endif
 
 class WS2811 : public LedStrip
 {
 public:
-    WS2811(int n, PinName mosi = MOSI_DEFAULT, PinName sclk = SCLK_DEFAULT);
+    WS2811(int n, SPI_Type *_spi, PinName mosi = MOSI_DEFAULT, PinName sclk = SCLK_DEFAULT);
     virtual void begin(void);
     virtual void show(void);
     virtual void blank(void);
 
 private:
-    SPI spi;            // to do actual communication
+    SPI_Type *spi;
+    PinName mosi;
+    uint8_t dmaBytes[16*3]; // enough for DMA'ing 1 RGB LED
 
     Timer guardtime;
-    uint32_t bogocal;
 
-    void write(uint8_t byte);
-    void writebit(bool bit);
-    void celldelay(void);
+    void writePixel(uint8_t *p);
+    void writeByte(uint8_t byte, uint8_t *dest);
+    void startDMA();
 };
 #endif
\ No newline at end of file