[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS/Demo/HCS12_GCC_banked/sci.h

@@ -0,0 +1,34 @@
+/** 
+ * sci.h controls SCI for GCC/HCS12 version of FreeRTOS Demo
+ * Parts taken from the CodeWarrior Demo in order to work similar.
+ *
+ * Author Jefferson L Smith, Robotronics Inc.
+ */
+
+#ifndef __SCI
+#define __SCI
+
+#include "cpu.h"
+
+#define COM0_Bm_38400baud         0    /* Constant for switch to mode 0 */
+#define COM0_Bm_19200baud         1    /* Constant for switch to mode 1 */
+#define COM0_Bm_9600baud          2    /* Constant for switch to mode 2 */
+#define COM0_Bm_4800baud          3    /* Constant for switch to mode 3 */
+
+
+/**
+ * SCI_SetBaudRateMode
+ *
+ * Changes the speed (baud rate).
+ */
+byte SCI_SetBaudRateMode(byte Mod);
+
+
+/**
+ * SCI_Init (bean AsynchroSerial)
+ *
+ * This enables SCI.
+ */
+void SCI_Init(void);
+
+#endif /* ifndef __SCI */