已经完成了网络，DI口，RS485的数据透传，可通过RS485接收数据

User/ioLibrary_Driver/Application/loopback/loopback.h

@@ -0,0 +1,38 @@
+#ifndef _LOOPBACK_H_
+#define _LOOPBACK_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/* Loopback test debug message printout enable */
+#define	_LOOPBACK_DEBUG_
+
+/* DATA_BUF_SIZE define for Loopback example */
+#ifndef DATA_BUF_SIZE
+	#define DATA_BUF_SIZE			2048
+#endif
+
+/************************/
+/* Select LOOPBACK_MODE */
+/************************/
+#define LOOPBACK_MAIN_NOBLOCK    0
+#define LOOPBACK_MODE   LOOPBACK_MAIN_NOBLOCK
+
+
+/* TCP server Loopback test example */
+int32_t loopback_tcps(uint8_t sn, uint8_t* buf, uint16_t port);
+
+/* TCP client Loopback test example */
+int32_t loopback_tcpc(uint8_t sn, uint8_t* buf, uint8_t* destip, uint16_t destport);
+
+/* UDP Loopback test example */
+int32_t loopback_udps(uint8_t sn, uint8_t* buf, uint16_t port);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif