Add ex2.i2c-bitbang example code

guowenxue

4 days ago d42fb887237e30d5026e006a3774d6b0a215b829

 ex1.ws2812b/Board/ws2812b.c

@@ -23,8 +23,6 @@
#include "ws2812b.h"
#include "miscdev.h"

#define mdelay(ms) HAL_Delay(ms)

static color_t g_ColorPanel[WS2812_NUM];

typedef struct ws_gpio_s