This is a bitbang library for WS2812. I test it with STM32F411RE (Nucleo 441RE). If you want to use another board, u need to adjust the sum of asm("nop"). In the example program i put some code to measure how many asm("nop") do we need. See more detail about WS2812 timing https://cdn-shop.adafruit.com/datasheets/WS2812.pdf

Dependents:   STM32FC_RGB_WS2812

Revision:
1:8910a1fcbdb0
Parent:
0:f080cb888db6
--- a/WS2812.h	Sat Dec 10 08:18:58 2016 +0000
+++ b/WS2812.h	Sat Dec 10 09:18:10 2016 +0000
@@ -15,7 +15,7 @@
   ~WS2812();
   void writeColor(uint32_t RGB);
   void send1Color(uint32_t RGB);
-  
+  void sendColors(uint32_t * ColorBuffer);
   void sendReset();
   
   private: