- change OSAL_TASK_FUNCTION to have void* parameter (to be consistent with most popular RTOS)

- add new error enum TUSB_ERROR_OSAL_TASK_CREATE_FAILED
- move usbh_enumeration_task prototype to usbh.h
- change OSAL_SUBTASK_INVOKED_AND_WAIT behavior, will not "return" in calling task when subtask got error status.
calling task need to do that after the call
- osal_queue_receive signature from uint32_t* to void*

- implement osal_freertos.h for FreeRTOS 7.3 --> able to compile & build host_freertos
+ OSAL_TASK_FUNCTION
+ turn on FPU for M4 in both host_os_none & host_freertos (freertos requires FPU to be on to compile)
+ osal_task_create
+ OSAL_SUBTASK_INVOKED_AND_WAIT
+ SUBTASK_ASSERT
+ osal_semaphore_reset
+ osal_queue_flush
+ adding heap_1.c for memory management

demos/host/src/main.c

@@ -33,9 +33,12 @@ int main(void)
 
   while (1)
   {
+
+#if TUSB_CFG_OS == TUSB_OS_NONE
     tusb_task_runner();
-    keyboard_app_task();
-    mouse_app_task();
+    keyboard_app_task(NULL);
+    mouse_app_task(NULL);
+#endif
 
     if (current_tick + CFG_TICKS_PER_SECOND < system_ticks)
     {