diff --git a/sil/hal_uart_in_wrapper.c b/sil/hal_uart_in_wrapper.c
new file mode 100644
index 0000000..f3aac1d
--- /dev/null
+++ b/sil/hal_uart_in_wrapper.c
@@ -0,0 +1,86 @@
+
+/*
+ * Include Files
+ *
+ */
+#if defined(MATLAB_MEX_FILE)
+#include "tmwtypes.h"
+#include "simstruc_types.h"
+#else
+#include "rtwtypes.h"
+#endif
+
+
+
+/* %%%-SFUNWIZ_wrapper_includes_Changes_BEGIN --- EDIT HERE TO _END */
+#ifdef HAL_IMPL
+#endif
+/* %%%-SFUNWIZ_wrapper_includes_Changes_END --- EDIT HERE TO _BEGIN */
+
+/*
+ * Create external references here.  
+ *
+ */
+/* %%%-SFUNWIZ_wrapper_externs_Changes_BEGIN --- EDIT HERE TO _END */
+ 
+/* %%%-SFUNWIZ_wrapper_externs_Changes_END --- EDIT HERE TO _BEGIN */
+
+/*
+ * Start function
+ *
+ */
+void hal_uart_in_Start_wrapper(const uint8_T *uart_id, const int_T p_width0)
+{
+/* %%%-SFUNWIZ_wrapper_Start_Changes_BEGIN --- EDIT HERE TO _END */
+#ifdef HAL_IMPL
+#endif
+/* %%%-SFUNWIZ_wrapper_Start_Changes_END --- EDIT HERE TO _BEGIN */
+}
+/*
+ * Output function
+ *
+ */
+void hal_uart_in_Outputs_wrapper(uint8_T *Data,
+			uint16_T *Data_len,
+			int32_T *ErrorCode,
+			const uint8_T *uart_id, const int_T p_width0,
+			const int_T y_width)
+{
+/* %%%-SFUNWIZ_wrapper_Outputs_Changes_BEGIN --- EDIT HERE TO _END */
+/* **********************************************************
+ * collect all data from this uart and push to Data buffer; 
+ *
+ * parameter:
+ * uart_id - uart FIFO device to read
+ *
+ * outputs:
+ * Data - read all FIFO data and write to Data array
+ * Data_len[0] - the number of written data
+ * ErrorCode[0] - return zero for success, others for failail.
+ *
+ * constant:
+ * y_width - maximum length to write to Data array
+ ************************************************************/
+Data_len[0] = 0u;
+ErrorCode[0] = -1;
+#ifdef HAL_IMPL
+    switch (uart_id[0])
+    {
+        case 0:
+            {
+                // TODO read all data from fifo
+                ErrorCode[0] = 0;
+            }
+            break;
+        case 1:
+            {
+                // TODO read all data from fifo
+                ErrorCode[0] = 0;
+            }
+            break;
+    }
+#endif
+/* %%%-SFUNWIZ_wrapper_Outputs_Changes_END --- EDIT HERE TO _BEGIN */
+}
+
+
diff --git a/sil/hal_uart_out_wrapper.c b/sil/hal_uart_out_wrapper.c
new file mode 100644
index 0000000..a1dda4f
--- /dev/null
+++ b/sil/hal_uart_out_wrapper.c
@@ -0,0 +1,89 @@
+
+/*
+ * Include Files
+ *
+ */
+#if defined(MATLAB_MEX_FILE)
+#include "tmwtypes.h"
+#include "simstruc_types.h"
+#else
+#include "rtwtypes.h"
+#endif
+
+
+
+/* %%%-SFUNWIZ_wrapper_includes_Changes_BEGIN --- EDIT HERE TO _END */
+#ifdef HAL_IMPL
+void rec(uint8_T *buff, uint16_T len);
+#endif
+/* %%%-SFUNWIZ_wrapper_includes_Changes_END --- EDIT HERE TO _BEGIN */
+#define y_width 1
+
+/*
+ * Create external references here.  
+ *
+ */
+/* %%%-SFUNWIZ_wrapper_externs_Changes_BEGIN --- EDIT HERE TO _END */
+ 
+/* %%%-SFUNWIZ_wrapper_externs_Changes_END --- EDIT HERE TO _BEGIN */
+
+/*
+ * Start function
+ *
+ */
+void hal_uart_out_Start_wrapper(const uint8_T *uart_id, const int_T p_width0)
+{
+/* %%%-SFUNWIZ_wrapper_Start_Changes_BEGIN --- EDIT HERE TO _END */
+#ifdef HAL_IMPL
+#endif
+/* %%%-SFUNWIZ_wrapper_Start_Changes_END --- EDIT HERE TO _BEGIN */
+}
+/*
+ * Output function
+ *
+ */
+void hal_uart_out_Outputs_wrapper(const uint8_T *buff,
+			const uint16_T *len,
+			const uint8_T *sep,
+			int32_T *ErrorCode,
+			const uint8_T *uart_id, const int_T p_width0,
+			const int_T u_width)
+{
+/* %%%-SFUNWIZ_wrapper_Outputs_Changes_BEGIN --- EDIT HERE TO _END */
+#ifdef HAL_IMPL
+static uint8_T last_seq;
+/* ***********************************************
+ * push all data to this uart output queue; 
+ *
+ * inputs:
+ * buff - data array to be sent
+ * len[0] - available length in the data array
+ * sep[0] - it means the data array updated when sep[0] changed,
+ * uart_id[0] - uart FIFO device which is required to send data 
+ *
+ * output:
+ * ErrorCode[0] - return zero for success, others for failail.
+ *
+ * constant:
+ * u_width - the maximum size of buff, do not read buff out of range.
+ *************************************************/
+ErrorCode[0] = -1;
+    switch (uart_id[0])
+    {
+        case 4:
+            if (sep[0] != last_seq)
+            {
+                last_seq = sep[0];
+                rec(buff, len[0]);
+                ErrorCode[0] = 0;
+            }
+            break;
+    }
+#else
+/* dummy function for generate mex file for sim*/
+ErrorCode[0] = 0;
+#endif
+/* %%%-SFUNWIZ_wrapper_Outputs_Changes_END --- EDIT HERE TO _BEGIN */
+}
+
+