4 files changed, 18 insertions, 6 deletions
diff --git a/components/utilities/Kconfig b/components/utilities/Kconfig
index 7fa6b47601..8b733ecf5c 100644
--- a/components/utilities/Kconfig
+++ b/components/utilities/Kconfig
@@ -2,12 +2,16 @@ menu "Utilities"
 
 config RT_USING_RYM
     bool "Enable Ymodem"
-    depends on RT_USING_DFS = y
     default n
 
     if RT_USING_RYM
-        config YMODEM_DISABLE_CRC_TABLE
-        bool "Disable CRC Table"
+        config YMODEM_USING_CRC_TABLE
+        bool "Enable CRC Table in Ymodem"
+        default n
+
+        config YMODEM_USING_FILE_TRANSFER
+        bool "Enable file transfer feature"
+        select RT_USING_DFS
         default n
     endif
 
diff --git a/components/utilities/ymodem/SConscript b/components/utilities/ymodem/SConscript
index 3fc3b17249..5be32247d6 100644
--- a/components/utilities/ymodem/SConscript
+++ b/components/utilities/ymodem/SConscript
@@ -1,8 +1,15 @@
 from building import *
 
 cwd     = GetCurrentDir()
-src     = Glob('*.c')
+src     = Split('''
+ymodem.c
+''')
+ 
 CPPPATH = [cwd]
+
+if GetDepend('RT_USING_DFS') and GetDepend('YMODEM_USING_FILE_TRANSFER'):
+    src += ['ry_sy.c']
+
 group   = DefineGroup('Utilities', src, depend = ['RT_USING_RYM'], CPPPATH = CPPPATH)
 
 Return('group')
diff --git a/components/utilities/ymodem/ry_sy.c b/components/utilities/ymodem/ry_sy.c
index fa57b8553a..4f4476e402 100644
--- a/components/utilities/ymodem/ry_sy.c
+++ b/components/utilities/ymodem/ry_sy.c
@@ -11,8 +11,9 @@
 #include <rtthread.h>
 #include <ymodem.h>
 #include <dfs_posix.h>
+
+#include <stdio.h>
 #include <stdlib.h>
-#include <board.h>
 #include <string.h>
 
 struct custom_ctx
diff --git a/components/utilities/ymodem/ymodem.c b/components/utilities/ymodem/ymodem.c
index 0214845303..07055db615 100644
--- a/components/utilities/ymodem/ymodem.c
+++ b/components/utilities/ymodem/ymodem.c
@@ -13,7 +13,7 @@
 #include <rthw.h>
 #include "ymodem.h"
 
-#ifndef YMODEM_DISABLE_CRC_TABLE
+#ifdef YMODEM_USING_CRC_TABLE 
 static const rt_uint16_t ccitt_table[256] =
 {
     0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,