diff --git a/app/MDK-ARM/app.uvguix.29643 b/app/MDK-ARM/app.uvguix.29643
index 1b4472d..76f6bae 100644
--- a/app/MDK-ARM/app.uvguix.29643
+++ b/app/MDK-ARM/app.uvguix.29643
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+          <Data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ata>
         </Buttons>
         <OriginalItems>
           <Len>898</Len>
@@ -1883,9 +1883,9 @@
       </Doc>
       <Doc>
         <Name>..\..\usersrc\usermain.c</Name>
-        <ColumnNumber>31</ColumnNumber>
-        <TopLine>10</TopLine>
-        <CurrentLine>24</CurrentLine>
+        <ColumnNumber>1</ColumnNumber>
+        <TopLine>57</TopLine>
+        <CurrentLine>81</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
         <PaneID>0</PaneID>
diff --git a/app/MDK-ARM/app.uvoptx b/app/MDK-ARM/app.uvoptx
index 56bc6a9..ce2e9a2 100644
--- a/app/MDK-ARM/app.uvoptx
+++ b/app/MDK-ARM/app.uvoptx
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
 <ProjectOpt xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="project_optx.xsd">
 
   <SchemaVersion>1.0</SchemaVersion>
@@ -45,7 +45,7 @@
         <PageWidth>79</PageWidth>
         <PageLength>66</PageLength>
         <TabStop>8</TabStop>
-        <ListingPath />
+        <ListingPath></ListingPath>
       </OPTLEX>
       <ListingPage>
         <CreateCListing>1</CreateCListing>
@@ -104,16 +104,16 @@
         <bSchkAxf>0</bSchkAxf>
         <bTchkAxf>0</bTchkAxf>
         <nTsel>3</nTsel>
-        <sDll />
-        <sDllPa />
-        <sDlgDll />
-        <sDlgPa />
-        <sIfile />
-        <tDll />
-        <tDllPa />
-        <tDlgDll />
-        <tDlgPa />
-        <tIfile />
+        <sDll></sDll>
+        <sDllPa></sDllPa>
+        <sDlgDll></sDlgDll>
+        <sDlgPa></sDlgPa>
+        <sIfile></sIfile>
+        <tDll></tDll>
+        <tDllPa></tDllPa>
+        <tDlgDll></tDlgDll>
+        <tDlgPa></tDlgPa>
+        <tIfile></tIfile>
         <pMon>BIN\CMSIS_AGDI.dll</pMon>
       </DebugOpt>
       <TargetDriverDllRegistry>
@@ -147,8 +147,8 @@
           <BreakByAccess>0</BreakByAccess>
           <BreakIfRCount>0</BreakIfRCount>
           <Filename>../Core/Src/main.c</Filename>
-          <ExecCommand />
-          <Expression />
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
         </Bp>
         <Bp>
           <Number>1</Number>
@@ -163,8 +163,8 @@
           <BreakByAccess>0</BreakByAccess>
           <BreakIfRCount>0</BreakIfRCount>
           <Filename>../Core/Src/main.c</Filename>
-          <ExecCommand />
-          <Expression />
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
         </Bp>
         <Bp>
           <Number>2</Number>
@@ -179,8 +179,8 @@
           <BreakByAccess>0</BreakByAccess>
           <BreakIfRCount>0</BreakIfRCount>
           <Filename>../Core/Src/main.c</Filename>
-          <ExecCommand />
-          <Expression />
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
         </Bp>
       </Breakpoint>
       <Tracepoint>
@@ -212,19 +212,19 @@
         <newCpu>0</newCpu>
         <uProt>0</uProt>
       </DebugFlag>
-      <LintExecutable />
-      <LintConfigFile />
+      <LintExecutable></LintExecutable>
+      <LintConfigFile></LintConfigFile>
       <bLintAuto>0</bLintAuto>
       <bAutoGenD>0</bAutoGenD>
       <LntExFlags>0</LntExFlags>
-      <pMisraName />
-      <pszMrule />
-      <pSingCmds />
-      <pMultCmds />
-      <pMisraNamep />
-      <pszMrulep />
-      <pSingCmdsp />
-      <pMultCmdsp />
+      <pMisraName></pMisraName>
+      <pszMrule></pszMrule>
+      <pSingCmds></pSingCmds>
+      <pMultCmds></pMultCmds>
+      <pMisraNamep></pMisraNamep>
+      <pszMrulep></pszMrulep>
+      <pSingCmdsp></pSingCmdsp>
+      <pMultCmdsp></pMultCmdsp>
       <DebugDescription>
         <Enable>1</Enable>
         <EnableFlashSeq>0</EnableFlashSeq>
@@ -292,8 +292,8 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>../Core/Src/spi.c</PathWithFileName>
-      <FilenameWithoutPath>spi.c</FilenameWithoutPath>
+      <PathWithFileName>../Core/Src/tim.c</PathWithFileName>
+      <FilenameWithoutPath>tim.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -348,8 +348,8 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_spi.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l4xx_hal_spi.c</FilenameWithoutPath>
+      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c</PathWithFileName>
+      <FilenameWithoutPath>stm32l4xx_hal_tim.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -360,8 +360,8 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_spi_ex.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l4xx_hal_spi_ex.c</FilenameWithoutPath>
+      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c</PathWithFileName>
+      <FilenameWithoutPath>stm32l4xx_hal_tim_ex.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -552,30 +552,6 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l4xx_hal_tim.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-    <File>
-      <GroupNumber>3</GroupNumber>
-      <FileNumber>26</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l4xx_hal_tim_ex.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-    <File>
-      <GroupNumber>3</GroupNumber>
-      <FileNumber>27</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
       <PathWithFileName>../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c</PathWithFileName>
       <FilenameWithoutPath>stm32l4xx_hal_uart.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
@@ -583,7 +559,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>28</FileNumber>
+      <FileNumber>26</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -603,7 +579,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>29</FileNumber>
+      <FileNumber>27</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -623,7 +599,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>5</GroupNumber>
-      <FileNumber>30</FileNumber>
+      <FileNumber>28</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
diff --git a/app/MDK-ARM/app.uvprojx b/app/MDK-ARM/app.uvprojx
index 566c421..6a1a9f6 100644
--- a/app/MDK-ARM/app.uvprojx
+++ b/app/MDK-ARM/app.uvprojx
@@ -1,7 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" noNamespaceSchemaLocation="project_projx.xsd">
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<Project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="project_projx.xsd">
+
   <SchemaVersion>2.1</SchemaVersion>
+
   <Header>### uVision Project, (C) Keil Software</Header>
+
   <Targets>
     <Target>
       <TargetName>app</TargetName>
@@ -16,28 +19,28 @@
           <PackID>Keil.STM32L4xx_DFP.2.6.1</PackID>
           <PackURL>http://www.keil.com/pack/</PackURL>
           <Cpu>IRAM(0x20000000-0x2000BFFF) IRAM2(0x10000000-0x10003FFF) IROM(0x8000000-0x801FFFF) CLOCK(8000000) FPU2 CPUTYPE("Cortex-M4") TZ</Cpu>
-          <FlashUtilSpec />
-          <StartupFile />
-          <FlashDriverDll />
+          <FlashUtilSpec></FlashUtilSpec>
+          <StartupFile></StartupFile>
+          <FlashDriverDll></FlashDriverDll>
           <DeviceId>0</DeviceId>
-          <RegisterFile />
-          <MemoryEnv />
-          <Cmp />
-          <Asm />
-          <Linker />
-          <OHString />
-          <InfinionOptionDll />
-          <SLE66CMisc />
-          <SLE66AMisc />
-          <SLE66LinkerMisc />
+          <RegisterFile></RegisterFile>
+          <MemoryEnv></MemoryEnv>
+          <Cmp></Cmp>
+          <Asm></Asm>
+          <Linker></Linker>
+          <OHString></OHString>
+          <InfinionOptionDll></InfinionOptionDll>
+          <SLE66CMisc></SLE66CMisc>
+          <SLE66AMisc></SLE66AMisc>
+          <SLE66LinkerMisc></SLE66LinkerMisc>
           <SFDFile>$$Device:STM32L432KBUx$CMSIS\SVD\STM32L4x2.svd</SFDFile>
           <bCustSvd>0</bCustSvd>
           <UseEnv>0</UseEnv>
-          <BinPath />
-          <IncludePath />
-          <LibPath />
-          <RegisterFilePath />
-          <DBRegisterFilePath />
+          <BinPath></BinPath>
+          <IncludePath></IncludePath>
+          <LibPath></LibPath>
+          <RegisterFilePath></RegisterFilePath>
+          <DBRegisterFilePath></DBRegisterFilePath>
           <TargetStatus>
             <Error>0</Error>
             <ExitCodeStop>0</ExitCodeStop>
@@ -52,15 +55,15 @@
           <CreateHexFile>1</CreateHexFile>
           <DebugInformation>1</DebugInformation>
           <BrowseInformation>1</BrowseInformation>
-          <ListingPath />
+          <ListingPath></ListingPath>
           <HexFormatSelection>1</HexFormatSelection>
           <Merge32K>0</Merge32K>
           <CreateBatchFile>0</CreateBatchFile>
           <BeforeCompile>
             <RunUserProg1>0</RunUserProg1>
             <RunUserProg2>0</RunUserProg2>
-            <UserProg1Name />
-            <UserProg2Name />
+            <UserProg1Name></UserProg1Name>
+            <UserProg2Name></UserProg2Name>
             <UserProg1Dos16Mode>0</UserProg1Dos16Mode>
             <UserProg2Dos16Mode>0</UserProg2Dos16Mode>
             <nStopU1X>0</nStopU1X>
@@ -69,8 +72,8 @@
           <BeforeMake>
             <RunUserProg1>0</RunUserProg1>
             <RunUserProg2>0</RunUserProg2>
-            <UserProg1Name />
-            <UserProg2Name />
+            <UserProg1Name></UserProg1Name>
+            <UserProg2Name></UserProg2Name>
             <UserProg1Dos16Mode>0</UserProg1Dos16Mode>
             <UserProg2Dos16Mode>0</UserProg2Dos16Mode>
             <nStopB1X>0</nStopB1X>
@@ -79,15 +82,15 @@
           <AfterMake>
             <RunUserProg1>0</RunUserProg1>
             <RunUserProg2>0</RunUserProg2>
-            <UserProg1Name />
-            <UserProg2Name />
+            <UserProg1Name></UserProg1Name>
+            <UserProg2Name></UserProg2Name>
             <UserProg1Dos16Mode>0</UserProg1Dos16Mode>
             <UserProg2Dos16Mode>0</UserProg2Dos16Mode>
             <nStopA1X>0</nStopA1X>
             <nStopA2X>0</nStopA2X>
           </AfterMake>
           <SelectedForBatchBuild>1</SelectedForBatchBuild>
-          <SVCSIdString />
+          <SVCSIdString></SVCSIdString>
         </TargetCommonOption>
         <CommonProperty>
           <UseCPPCompiler>0</UseCPPCompiler>
@@ -101,8 +104,8 @@
           <AssembleAssemblyFile>0</AssembleAssemblyFile>
           <PublicsOnly>0</PublicsOnly>
           <StopOnExitCode>3</StopOnExitCode>
-          <CustomArgument />
-          <IncludeLibraryModules />
+          <CustomArgument></CustomArgument>
+          <IncludeLibraryModules></IncludeLibraryModules>
           <ComprImg>0</ComprImg>
         </CommonProperty>
         <DllOption>
@@ -135,11 +138,11 @@
           </Flash1>
           <bUseTDR>1</bUseTDR>
           <Flash2>BIN\UL2V8M.DLL</Flash2>
-          <Flash3 />
-          <Flash4 />
-          <pFcarmOut />
-          <pFcarmGrp />
-          <pFcArmRoot />
+          <Flash3></Flash3>
+          <Flash4></Flash4>
+          <pFcarmOut></pFcarmOut>
+          <pFcarmGrp></pFcarmGrp>
+          <pFcArmRoot></pFcArmRoot>
           <FcArmLst>0</FcArmLst>
         </Utilities>
         <TargetArmAds>
@@ -172,7 +175,7 @@
             <RvctClst>0</RvctClst>
             <GenPPlst>0</GenPPlst>
             <AdsCpuType>"Cortex-M4"</AdsCpuType>
-            <RvctDeviceName />
+            <RvctDeviceName></RvctDeviceName>
             <mOS>0</mOS>
             <uocRom>0</uocRom>
             <uocRam>0</uocRam>
@@ -306,7 +309,7 @@
                 <Size>0x4000</Size>
               </OCR_RVCT10>
             </OnChipMemories>
-            <RvctStartVector />
+            <RvctStartVector></RvctStartVector>
           </ArmAdsMisc>
           <Cads>
             <interw>1</interw>
@@ -333,9 +336,9 @@
             <v6WtE>0</v6WtE>
             <v6Rtti>0</v6Rtti>
             <VariousControls>
-              <MiscControls />
+              <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER,STM32L432xx</Define>
-              <Undefine />
+              <Undefine></Undefine>
               <IncludePath>../Core/Inc;../Drivers/STM32L4xx_HAL_Driver/Inc;../Drivers/STM32L4xx_HAL_Driver/Inc/Legacy;../Drivers/CMSIS/Device/ST/STM32L4xx/Include;../Drivers/CMSIS/Include</IncludePath>
             </VariousControls>
           </Cads>
@@ -351,10 +354,10 @@
             <useXO>0</useXO>
             <ClangAsOpt>1</ClangAsOpt>
             <VariousControls>
-              <MiscControls />
-              <Define />
-              <Undefine />
-              <IncludePath />
+              <MiscControls></MiscControls>
+              <Define></Define>
+              <Undefine></Undefine>
+              <IncludePath></IncludePath>
             </VariousControls>
           </Aads>
           <LDads>
@@ -364,15 +367,15 @@
             <noStLib>0</noStLib>
             <RepFail>1</RepFail>
             <useFile>0</useFile>
-            <TextAddressRange />
-            <DataAddressRange />
-            <pXoBase />
-            <ScatterFile />
-            <IncludeLibs />
-            <IncludeLibsPath />
-            <Misc />
-            <LinkerInputFile />
-            <DisabledWarnings />
+            <TextAddressRange></TextAddressRange>
+            <DataAddressRange></DataAddressRange>
+            <pXoBase></pXoBase>
+            <ScatterFile></ScatterFile>
+            <IncludeLibs></IncludeLibs>
+            <IncludeLibsPath></IncludeLibsPath>
+            <Misc></Misc>
+            <LinkerInputFile></LinkerInputFile>
+            <DisabledWarnings></DisabledWarnings>
           </LDads>
         </TargetArmAds>
       </TargetOption>
@@ -417,6 +420,8 @@
                   <AssembleAssemblyFile>2</AssembleAssemblyFile>
                   <PublicsOnly>2</PublicsOnly>
                   <StopOnExitCode>11</StopOnExitCode>
+                  <CustomArgument></CustomArgument>
+                  <IncludeLibraryModules></IncludeLibraryModules>
                   <ComprImg>1</ComprImg>
                 </CommonProperty>
                 <FileArmAds>
@@ -444,19 +449,13 @@
                     <v6Lto>2</v6Lto>
                     <v6WtE>2</v6WtE>
                     <v6Rtti>2</v6Rtti>
+                    <VariousControls>
+                      <MiscControls></MiscControls>
+                      <Define></Define>
+                      <Undefine></Undefine>
+                      <IncludePath></IncludePath>
+                    </VariousControls>
                   </Cads>
-                  <Aads>
-                    <interw>2</interw>
-                    <Ropi>2</Ropi>
-                    <Rwpi>2</Rwpi>
-                    <thumb>2</thumb>
-                    <SplitLS>2</SplitLS>
-                    <SwStkChk>2</SwStkChk>
-                    <NoWarn>2</NoWarn>
-                    <uSurpInc>2</uSurpInc>
-                    <useXO>2</useXO>
-                    <ClangAsOpt>1</ClangAsOpt>
-                  </Aads>
                 </FileArmAds>
               </FileOption>
             </File>
@@ -603,17 +602,18 @@
       </Groups>
     </Target>
   </Targets>
+
   <RTE>
-    <apis />
+    <apis/>
     <components>
       <component Cclass="CMSIS" Cgroup="CORE" Cvendor="ARM" Cversion="4.3.0" condition="CMSIS Core">
-        <package name="CMSIS" schemaVersion="1.3" url="http://www.keil.com/pack/" vendor="ARM" version="4.5.0" />
+        <package name="CMSIS" schemaVersion="1.3" url="http://www.keil.com/pack/" vendor="ARM" version="4.5.0"/>
         <targetInfos>
-          <targetInfo name="app" />
+          <targetInfo name="app"/>
         </targetInfos>
       </component>
     </components>
-    <files />
+    <files/>
   </RTE>
-</Project>
 
+</Project>
diff --git a/usersrc/usermain.c b/usersrc/usermain.c
index 66671f3..a2da02f 100644
--- a/usersrc/usermain.c
+++ b/usersrc/usermain.c
@@ -14,15 +14,17 @@
 #define SPI_SCK_0() HAL_GPIO_WritePin(CLK_GPIO_Port, CLK_Pin, GPIO_PIN_RESET)        /* SCK = 0 */
 #define SPI_MOSI_1() HAL_GPIO_WritePin(MOSI_GPIO_Port, MOSI_Pin, GPIO_PIN_SET)       /* MOSI = 1 */
 #define SPI_MOSI_0() HAL_GPIO_WritePin(MOSI_GPIO_Port, MOSI_Pin, GPIO_PIN_RESET)     /* MOSI = 0 */
-#define SPI_READ_MISO() GPIO_ReadInputDataBit(MISO_GPIO_Port, MISO_Pin)              /* 读MISO口线状态 */
+#define SPI_READ_MISO() HAL_GPIO_ReadPin(MISO_GPIO_Port, MISO_Pin)                   /* 读MISO口线状态 */
 
 #define Dummy_Byte 0xFF // 读取时MISO发送的数据，可以为任意数据
 
-void sys_sys_delay_us(uint32_t us) {
+void sys_delay_us(uint32_t us)
+{
   uint16_t counter = 0;
   __HAL_TIM_SET_COUNTER(&htim7, 0);
   HAL_TIM_Base_Start(&htim7);
-  while (counter < us) {
+  while (counter < us)
+  {
     counter = __HAL_TIM_GET_COUNTER(&htim7);
   }
   HAL_TIM_Base_Stop(&htim7);
@@ -65,25 +67,26 @@ uint8_t SPI_ReadWriteByte(uint8_t txData)
   return rxData;
 }
 
-// uint8_t SPI_ReadByte(void)
-// {
-//   return SPI_ReadWriteByte(Dummy_Byte);
-// }
+uint8_t SPI_ReadByte(void)
+{
+  return SPI_ReadWriteByte(Dummy_Byte);
+}
 
-// void SPI_WriteByte(uint8_t txData)
-// {
-//   (void)SPI_ReadWriteByte(txData);
-// }
+void SPI_WriteByte(uint8_t txData)
+{
+  (void)SPI_ReadWriteByte(txData);
+}
 
 void user_main()
 {
   uint8_t temp;
 
-  SPI_CS_Disable();
+  SPI_CS_1();
 
   while (1)
   {
-    // HAL_UART_Transmit(&huart1, &temp, 1, 100);
+    temp = SPI_ReadWriteByte(0x86);
+    HAL_UART_Transmit(&huart1, &temp, 1, 100);
     HAL_Delay(100);
   }
 }