[freertos] add freertos firmware

Change-Id: I4158d66d9b5fc444e28287f55e79ac24e0a1666f

freertos/cvitek/install/include/common/delay.h

@@ -0,0 +1,26 @@
+#ifndef _DELAY_H
+#define _DELAY_H
+
+#include "FreeRTOS.h"
+#include <sleep.h>
+
+#ifndef udelay
+#define udelay(us)		usleep(us)
+#endif
+
+/* use vTaskDelay to replace usleep api
+ * usleep is a busy waiting api
+ */
+#ifndef mdelay
+#define mdelay(ms)		usleep(ms * 1000)
+/*#define mdelay(ms)  \
+do { \
+	if (ms < (configTICK_RATE_HZ / 1000)) \
+		usleep(ms * 1000); \
+	else \
+	    vTaskDelay(pdMS_TO_TICKS(ms)); \
+} while(0)
+*/
+#endif
+
+#endif // end of _DELAY_H