优化demo代码和api接口

Change-Id: I094570a31d63204aaa5da809751e27acd60f60d8
diff --git a/mbtk/test/liblynq_lib/lynq_call_test.c b/mbtk/test/liblynq_lib/lynq_call_test.c
index c68d92e..670eb10 100755
--- a/mbtk/test/liblynq_lib/lynq_call_test.c
+++ b/mbtk/test/liblynq_lib/lynq_call_test.c
@@ -300,22 +300,23 @@
     voice_client_handle_type handle = -1;
     int  voice_call_id = 0;
     mbtk_log_init("radio", "CALL_TEST");
-
+    
+    printf("=========call main=========\n"
+        "\t0 exit\n"
+        "\t1 call init\n"
+        "\t2 call add register handle\n"
+        "\t3 call start\n"
+        "\t4 call end\n"
+        "\t5 call answer\n"
+        "\t6 call remove register handle\n"
+        "\t7 call set volume level 0-5\n"
+        "\t8 call get volume\n"
+        "\t9 call dtmf\n"
+        "\t10 call deinit\n"
+        "operator: >> \n");
+    
     while(1)
     {
-        printf("=========call main=========\n"
-            "\t0 exit\n"
-            "\t1 call init\n"
-            "\t2 call add register handle\n"
-            "\t3 call start\n"
-            "\t4 call end\n"
-            "\t5 call answer\n"
-            "\t6 call remove register handle\n"
-            "\t7 call set volume level 0-5\n"
-            "\t8 call get volume\n"
-            "\t9 call deinit\n"
-            "operator: >> \n");
-
         fgets(operator, sizeof(operator), stdin);
         fflush(stdin);
         opt = atoi(operator);
@@ -362,6 +363,20 @@
             printf("volume level = %d\n",lv_voll);
             break;
         case 9:
+            {
+                char inputChar;
+                
+                printf("Enter set dtmf\n");
+                scanf(" %c", &inputChar);
+                printf("inputChar is %c\n", inputChar);
+                
+                if (qser_voice_set_dtmf(inputChar) != 0) 
+                {
+                    printf("qser set voice dtmf failed\n");
+                }
+            }
+            break;
+        case 10:
             qser_voice_call_client_deinit(handle);
             break;
         default: