diff --git a/code/application/source/sf_app/code/include/sf_hal_ttyusb.h b/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
index 1a3d6c35d..03fddc650 100755
--- a/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
+++ b/code/application/source/sf_app/code/include/sf_hal_ttyusb.h
@@ -61,6 +61,16 @@ typedef struct sf_SERIAL_DATA_FRAME_TYPE_S {
 	
 }SF_SERIAL_DATA_FRAME_TYPE_S;
 
+typedef struct sf_TTY_DATA_TYPE_S {
+	int waitMs;
+	unsigned int len;
+    unsigned int lenMax;
+    char *cmp;
+    char *cmperr;
+	char *data;
+}SF_TTY_DATA_TYPE_S;
+
+
 SINT32 sf_hal_ttyusb2_init(void);
 
 SINT32 sf_hal_ttyusb2_write(SF_CHAR *sendBuf, SINT32 dataLen);
@@ -77,7 +87,7 @@ SINT32 sf_hal_uart_read(SF_CHAR *recvBuf, SINT32 waitMs);
 
 SINT32 sf_hal_uart_deinit(void);
 
-
+SINT32 sf_hal_ttyusb2_read_buf(SF_TTY_DATA_TYPE_S *recv);
 
 #ifdef __cplusplus
 #if __cplusplus
diff --git a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
index 732de229e..68274422b 100755
--- a/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
+++ b/code/application/source/sf_app/code/source/ttyusb/sf_hal_ttyusb.c
@@ -249,10 +249,10 @@ static SINT32 hal_ttyusb_read(SINT32 fd, SF_CHAR *recvBuf, SINT32 waitTime)
 	SINT32 s32ret = 0;
 	fd_set read_fds;
 	struct timeval TimeoutVal;
-	if(waitTime > 0)
-		sf_sleep_ms(waitTime);
+	//if(waitTime > 0)
+	//	sf_sleep_ms(waitTime);
 	
-	while(waitTime--)
+	//while(waitTime--)
     {
 		
 		
@@ -275,13 +275,13 @@ static SINT32 hal_ttyusb_read(SINT32 fd, SF_CHAR *recvBuf, SINT32 waitTime)
 		} 
 		else if (s32ret < 0) {
 			//MLOGE(" select failed\n");
-            //return SF_FAILURE;
-			continue;
+            return SF_FAILURE;
+			//continue;
 		} 
 		else if (0 == s32ret) {
 			//MLOGW("FIFO select timeout [%d]\n",waitTime);
-            //return SF_FAILURE;
-			continue;
+            return SF_FAILURE;
+			//continue;
 		}
 		
 	}
@@ -415,6 +415,46 @@ SINT32 sf_hal_uart_deinit(void)
 
 	return hal_ttyusb_destory(UartFd);
 }
+
+SINT32 sf_hal_ttyusb2_read_buf(SF_TTY_DATA_TYPE_S *recv)
+{
+	//SF_PDT_PARAM_CFG_S *sfParam = sf_customer_param_get();
+	SINT32 s32ret = 0;
+	fd_set read_fds;
+	struct timeval TimeoutVal;
+    int waitTime = 2;
+    unsigned int dataL = 0;
+    FD_ZERO(&read_fds);
+    FD_SET(TtyUSB2Fd, &read_fds);
+
+    TimeoutVal.tv_sec  = 0;
+    TimeoutVal.tv_usec = (recv->waitMs)*1000;
+
+    while(waitTime--)
+    {
+        s32ret = select(TtyUSB2Fd + 1, &read_fds, NULL, NULL, &TimeoutVal);
+        if (s32ret > 0) {
+            if (FD_ISSET(TtyUSB2Fd, &read_fds)) {
+                s32ret = read(TtyUSB2Fd, recv->data+dataL, recv->lenMax);
+                dataL += strlen(recv->data);
+                if ((((dataL) >= (recv->len)) && (strstr(recv->data, recv->cmp))) || (strstr(recv->data, recv->cmperr))) {
+                    break;
+                }
+            }
+        } 
+        else if (s32ret < 0) {
+            MLOGE(" select failed\n");
+            continue;
+        } 
+        else if (0 == s32ret) {
+            MLOGW("FIFO select timeout [%d]\n",waitTime);
+            continue;
+        }
+    }
+    FD_CLR(TtyUSB2Fd, &read_fds);
+	return SF_SUCCESS;
+}
+
 #ifdef __cplusplus
 #if __cplusplus
 }