diff --git a/.config b/.config
index bc165a8..280b4c1 100644
--- a/.config
+++ b/.config
@@ -104,7 +104,7 @@ CONFIG_RT_USING_FINSH=y
 CONFIG_FINSH_USING_MSH=y
 CONFIG_FINSH_THREAD_NAME="tshell"
 CONFIG_FINSH_THREAD_PRIORITY=20
-CONFIG_FINSH_THREAD_STACK_SIZE=4096
+CONFIG_FINSH_THREAD_STACK_SIZE=2048
 CONFIG_FINSH_USING_HISTORY=y
 CONFIG_FINSH_HISTORY_LINES=5
 CONFIG_FINSH_USING_SYMTAB=y
@@ -596,7 +596,7 @@ CONFIG_PKG_SQLITE_PATH="/packages/system/sqlite"
 CONFIG_PKG_SQLITE_VER="v3.19.3"
 CONFIG_PKG_SQLITE_SQL_MAX_LEN=1024
 CONFIG_PKG_SQLITE_DB_NAME_MAX_LEN=64
-CONFIG_PKG_SQLITE_DAO_EXAMPLE=y
+# CONFIG_PKG_SQLITE_DAO_EXAMPLE is not set
 CONFIG_PKG_USING_SQLITE_V3193=y
 # CONFIG_PKG_USING_RTI is not set
 # CONFIG_PKG_USING_DFS_YAFFS is not set
diff --git a/.cproject b/.cproject
index 7b03eb0..d284003 100644
--- a/.cproject
+++ b/.cproject
@@ -3,7 +3,13 @@
   <storageModule moduleId="org.eclipse.cdt.core.settings">
     <cconfiguration id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.553091094">
       <storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.553091094" moduleId="org.eclipse.cdt.core.settings" name="Debug">
-        <externalSettings />
+        <externalSettings>
+          <externalSetting>
+            <entry flags="VALUE_WORKSPACE_PATH" kind="includePath" name="/828" />
+            <entry flags="VALUE_WORKSPACE_PATH" kind="libraryPath" name="/828/Debug" />
+            <entry flags="RESOLVED" kind="libraryFile" name="rtthread" srcPrefixMapping="" srcRootPath="" />
+          </externalSetting>
+        </externalSettings>
         <extensions>
           <extension id="org.eclipse.cdt.core.ELF" point="org.eclipse.cdt.core.BinaryParser" />
           <extension id="org.eclipse.cdt.core.GASErrorParser" point="org.eclipse.cdt.core.ErrorParser" />
@@ -14,7 +20,7 @@
         </extensions>
       </storageModule>
       <storageModule moduleId="cdtBuildSystem" version="4.0.0">
-        <configuration artifactName="rtthread" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.debug" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.553091094" name="Debug" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug">
+        <configuration artifactExtension="elf" artifactName="rtthread" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.debug" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.553091094" name="Debug" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug" postbuildStep="arm-none-eabi-objcopy -O ihex &quot;rtthread.elf&quot; &quot;${ProjName}.hex&quot;">
           <folderInfo id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.553091094." name="/" resourcePath="">
             <toolChain id="ilg.gnuarmeclipse.managedbuild.cross.toolchain.elf.debug.1201710416" name="ARM Cross GCC" superClass="ilg.gnuarmeclipse.managedbuild.cross.toolchain.elf.debug">
               <option id="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createflash.251260409" name="Create flash image" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createflash" useByScannerDiscovery="false" value="true" valueType="boolean" />
@@ -145,6 +151,7 @@
                 <option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.usenewlibnosys.1948314201" name="Do not use syscalls (--specs=nosys.specs)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.usenewlibnosys" useByScannerDiscovery="false" value="false" valueType="boolean" />
                 <option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.verbose.273162112" name="Verbose (-v)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.verbose" useByScannerDiscovery="false" value="false" valueType="boolean" />
                 <option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths.1399535143" name="Library search path (-L)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths" useByScannerDiscovery="false" />
+                <option defaultValue="true" id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.shared.1080827073" name="Shared (-shared)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.shared" valueType="boolean" />
                 <inputType id="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker.input.262373798" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker.input">
                   <additionalInput kind="additionalinputdependency" paths="$(USER_OBJS)" />
                   <additionalInput kind="additionalinput" paths="$(LIBS)" />
@@ -241,11 +248,22 @@
               <option id="ilg.gnuarmeclipse.managedbuild.cross.option.warnings.allwarn.1381561249.62315102" name="Enable all common warnings (-Wall)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.warnings.allwarn.1381561249" />
               <option id="ilg.gnuarmeclipse.managedbuild.cross.option.target.other.2041717463.1413802919" name="Other target flags" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.target.other.2041717463" />
               <option id="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.fpu.unit.1463655269.1841695866" name="FPU Type" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.fpu.unit.1463655269" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.level.208045305" name="Optimization Level" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.level" value="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.level.none" valueType="enumerated" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.messagelength.243028108" name="Message length (-fmessage-length=0)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.messagelength" value="true" valueType="boolean" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.signedchar.832062875" name="'char' is signed (-fsigned-char)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.signedchar" value="true" valueType="boolean" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.functionsections.1276842886" name="Function sections (-ffunction-sections)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.functionsections" value="true" valueType="boolean" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.datasections.1667317482" name="Data sections (-fdata-sections)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.optimization.datasections" value="true" valueType="boolean" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.debugging.level.1566045926" name="Debug level" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.debugging.level" value="ilg.gnuarmeclipse.managedbuild.cross.option.debugging.level.max" valueType="enumerated" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.debugging.format.1854589250" name="Debug format" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.debugging.format" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createflash.1817097645" name="Create flash image" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createflash" value="true" valueType="boolean" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createlisting.271108098" name="Create extended listing" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.createlisting" />
+              <option id="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.printsize.1970971720" name="Print size" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.addtools.printsize" value="true" valueType="boolean" />
+              <targetPlatform archList="all" binaryParser="org.eclipse.cdt.core.ELF" id="ilg.gnuarmeclipse.managedbuild.cross.targetPlatform" isAbstract="false" osList="all" superClass="ilg.gnuarmeclipse.managedbuild.cross.targetPlatform" />
               <tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.222740011" name="GNU ARM Cross Assembler" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.1810966071">
                 <inputType id="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.input.419794698" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.input" />
               </tool>
               <tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.1026498694" name="GNU ARM Cross C Compiler" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.1570350559">
-                <option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths.1599109014" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths" useByScannerDiscovery="true" valueType="includePath">
+                <option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths.1599109014" name="Include paths (-I)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths" useByScannerDiscovery="true" valueType="includePath">
                   <listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers}&quot;" />
                   <listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}/applications/RUN_LED}&quot;" />
                   <listOptionValue builtIn="false" value="&quot;${workspace_loc://${ProjName}/drivers//include}&quot;" />
@@ -290,7 +308,7 @@
             </toolChain>
           </folderInfo>
           <sourceEntries>
-            <entry excluding="//cubemx/Drivers|//cubemx/EWARM|//cubemx/Src/stm32f4xx_it.c|//cubemx/Src/system_stm32f4xx.c|//packages/sqlite-v3.19.3/rtthread_io_methods.c|//packages/sqlite-v3.19.3/rtthread_mutex.c|//packages/sqlite-v3.19.3/rtthread_vfs.c|//packages/sqlite-v3.19.3/shell.c|//rt-thread/components/dfs/filesystems/nfs|//rt-thread/components/dfs/filesystems/ramfs|//rt-thread/components/dfs/filesystems/romfs|//rt-thread/components/dfs/filesystems/skeleton|//rt-thread/components/drivers/audio|//rt-thread/components/drivers/can|//rt-thread/components/drivers/cputime|//rt-thread/components/drivers/hwcrypto|//rt-thread/components/drivers/hwtimer|//rt-thread/components/drivers/i2c|//rt-thread/components/drivers/misc/adc.c|//rt-thread/components/drivers/misc/dac.c|//rt-thread/components/drivers/misc/pulse_encoder.c|//rt-thread/components/drivers/misc/rt_drv_pwm.c|//rt-thread/components/drivers/misc/rt_inputcapture.c|//rt-thread/components/drivers/mtd|//rt-thread/components/drivers/phy|//rt-thread/components/drivers/pm|//rt-thread/components/drivers/rtc|//rt-thread/components/drivers/sensors|//rt-thread/components/drivers/serial/serial_v2.c|//rt-thread/components/drivers/spi|//rt-thread/components/drivers/touch|//rt-thread/components/drivers/usb|//rt-thread/components/drivers/watchdog|//rt-thread/components/drivers/wlan|//rt-thread/components/fal|//rt-thread/components/libc/compilers/armlibc|//rt-thread/components/libc/compilers/dlib|//rt-thread/components/libc/cplusplus|//rt-thread/components/libc/posix|//rt-thread/components/lwp|//rt-thread/components/net|//rt-thread/components/utilities|//rt-thread/components/vbus|//rt-thread/components/vmm|//rt-thread/libcpu/aarch64|//rt-thread/libcpu/arc|//rt-thread/libcpu/arm/AT91SAM7S|//rt-thread/libcpu/arm/AT91SAM7X|//rt-thread/libcpu/arm/am335x|//rt-thread/libcpu/arm/arm926|//rt-thread/libcpu/arm/armv6|//rt-thread/libcpu/arm/common/divsi3.S|//rt-thread/libcpu/arm/cortex-a|//rt-thread/libcpu/arm/cortex-m0|//rt-thread/libcpu/arm/cortex-m23|//rt-thread/libcpu/arm/cortex-m3|//rt-thread/libcpu/arm/cortex-m33|//rt-thread/libcpu/arm/cortex-m4/context_iar.S|//rt-thread/libcpu/arm/cortex-m4/context_rvds.S|//rt-thread/libcpu/arm/cortex-m7|//rt-thread/libcpu/arm/cortex-r4|//rt-thread/libcpu/arm/dm36x|//rt-thread/libcpu/arm/lpc214x|//rt-thread/libcpu/arm/lpc24xx|//rt-thread/libcpu/arm/realview-a8-vmm|//rt-thread/libcpu/arm/s3c24x0|//rt-thread/libcpu/arm/s3c44b0|//rt-thread/libcpu/arm/sep4020|//rt-thread/libcpu/arm/zynqmp-r5|//rt-thread/libcpu/avr32|//rt-thread/libcpu/blackfin|//rt-thread/libcpu/c-sky|//rt-thread/libcpu/ia32|//rt-thread/libcpu/m16c|//rt-thread/libcpu/mips|//rt-thread/libcpu/nios|//rt-thread/libcpu/ppc|//rt-thread/libcpu/risc-v|//rt-thread/libcpu/rx|//rt-thread/libcpu/sim|//rt-thread/libcpu/sparc-v8|//rt-thread/libcpu/ti-dsp|//rt-thread/libcpu/unicore32|//rt-thread/libcpu/v850|//rt-thread/libcpu/xilinx|//rt-thread/src/cpu.c|//rt-thread/src/memheap.c|//rt-thread/src/signal.c|//rt-thread/src/slab.c|//rt-thread/tools" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="" />
+            <entry excluding="//cubemx/Drivers|//cubemx/EWARM|//cubemx/Src/stm32f4xx_it.c|//cubemx/Src/system_stm32f4xx.c|//packages/sqlite-v3.19.3/rtthread_io_methods.c|//packages/sqlite-v3.19.3/rtthread_mutex.c|//packages/sqlite-v3.19.3/rtthread_vfs.c|//packages/sqlite-v3.19.3/shell.c|//packages/sqlite-v3.19.3/student_dao.c|//rt-thread/components/dfs/filesystems/nfs|//rt-thread/components/dfs/filesystems/ramfs|//rt-thread/components/dfs/filesystems/romfs|//rt-thread/components/dfs/filesystems/skeleton|//rt-thread/components/drivers/audio|//rt-thread/components/drivers/can|//rt-thread/components/drivers/cputime|//rt-thread/components/drivers/hwcrypto|//rt-thread/components/drivers/hwtimer|//rt-thread/components/drivers/i2c|//rt-thread/components/drivers/misc/adc.c|//rt-thread/components/drivers/misc/dac.c|//rt-thread/components/drivers/misc/pulse_encoder.c|//rt-thread/components/drivers/misc/rt_drv_pwm.c|//rt-thread/components/drivers/misc/rt_inputcapture.c|//rt-thread/components/drivers/mtd|//rt-thread/components/drivers/phy|//rt-thread/components/drivers/pm|//rt-thread/components/drivers/rtc|//rt-thread/components/drivers/sensors|//rt-thread/components/drivers/serial/serial_v2.c|//rt-thread/components/drivers/spi|//rt-thread/components/drivers/touch|//rt-thread/components/drivers/usb|//rt-thread/components/drivers/watchdog|//rt-thread/components/drivers/wlan|//rt-thread/components/fal|//rt-thread/components/libc/compilers/armlibc|//rt-thread/components/libc/compilers/dlib|//rt-thread/components/libc/cplusplus|//rt-thread/components/libc/posix|//rt-thread/components/lwp|//rt-thread/components/net|//rt-thread/components/utilities|//rt-thread/components/vbus|//rt-thread/components/vmm|//rt-thread/libcpu/aarch64|//rt-thread/libcpu/arc|//rt-thread/libcpu/arm/AT91SAM7S|//rt-thread/libcpu/arm/AT91SAM7X|//rt-thread/libcpu/arm/am335x|//rt-thread/libcpu/arm/arm926|//rt-thread/libcpu/arm/armv6|//rt-thread/libcpu/arm/common/divsi3.S|//rt-thread/libcpu/arm/cortex-a|//rt-thread/libcpu/arm/cortex-m0|//rt-thread/libcpu/arm/cortex-m23|//rt-thread/libcpu/arm/cortex-m3|//rt-thread/libcpu/arm/cortex-m33|//rt-thread/libcpu/arm/cortex-m4/context_iar.S|//rt-thread/libcpu/arm/cortex-m4/context_rvds.S|//rt-thread/libcpu/arm/cortex-m7|//rt-thread/libcpu/arm/cortex-r4|//rt-thread/libcpu/arm/dm36x|//rt-thread/libcpu/arm/lpc214x|//rt-thread/libcpu/arm/lpc24xx|//rt-thread/libcpu/arm/realview-a8-vmm|//rt-thread/libcpu/arm/s3c24x0|//rt-thread/libcpu/arm/s3c44b0|//rt-thread/libcpu/arm/sep4020|//rt-thread/libcpu/arm/zynqmp-r5|//rt-thread/libcpu/avr32|//rt-thread/libcpu/blackfin|//rt-thread/libcpu/c-sky|//rt-thread/libcpu/ia32|//rt-thread/libcpu/m16c|//rt-thread/libcpu/mips|//rt-thread/libcpu/nios|//rt-thread/libcpu/ppc|//rt-thread/libcpu/risc-v|//rt-thread/libcpu/rx|//rt-thread/libcpu/sim|//rt-thread/libcpu/sparc-v8|//rt-thread/libcpu/ti-dsp|//rt-thread/libcpu/unicore32|//rt-thread/libcpu/v850|//rt-thread/libcpu/xilinx|//rt-thread/src/cpu.c|//rt-thread/src/memheap.c|//rt-thread/src/signal.c|//rt-thread/src/slab.c|//rt-thread/tools" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="" />
           </sourceEntries>
         </configuration>
       </storageModule>
diff --git a/rtconfig.h b/rtconfig.h
index c01ca8e..873a24a 100644
--- a/rtconfig.h
+++ b/rtconfig.h
@@ -61,7 +61,7 @@
 
 #define RT_USING_COMPONENTS_INIT
 #define RT_USING_USER_MAIN
-#define RT_MAIN_THREAD_STACK_SIZE 1024*16
+#define RT_MAIN_THREAD_STACK_SIZE 2048
 #define RT_MAIN_THREAD_PRIORITY 10
 #define RT_USING_LEGACY
 #define RT_USING_MSH
@@ -69,7 +69,7 @@
 #define FINSH_USING_MSH
 #define FINSH_THREAD_NAME "tshell"
 #define FINSH_THREAD_PRIORITY 20
-#define FINSH_THREAD_STACK_SIZE 4096
+#define FINSH_THREAD_STACK_SIZE 2048
 #define FINSH_USING_HISTORY
 #define FINSH_HISTORY_LINES 5
 #define FINSH_USING_SYMTAB
@@ -109,7 +109,7 @@
 #define RT_SERIAL_RB_BUFSZ 64
 #define RT_USING_PIN
 #define RT_USING_SDIO
-#define RT_SDIO_STACK_SIZE 1024*2
+#define RT_SDIO_STACK_SIZE 1024
 #define RT_SDIO_THREAD_PRIORITY 15
 #define RT_MMCSD_STACK_SIZE 1024
 #define RT_MMCSD_THREAD_PREORITY 22
@@ -232,7 +232,6 @@
 #define PKG_USING_SQLITE
 #define PKG_SQLITE_SQL_MAX_LEN 1024
 #define PKG_SQLITE_DB_NAME_MAX_LEN 64
-#define PKG_SQLITE_DAO_EXAMPLE
 #define PKG_USING_SQLITE_V3193
 /* end of system packages */