From 1ead1e1ad39d180623074bdd4722520eee96fe98 Mon Sep 17 00:00:00 2001
From: Mateusz Lubecki <sp8ebc@interia.pl>
Date: Sun, 18 Oct 2020 13:03:43 +0200
Subject: [PATCH] untested - changes within modbus-rtu and serial code to fix
 problem with idle frames

---
 .cproject                             | 59 ++++++++++++++++++---------
 system/include/drivers/serial.h       |  4 ++
 system/src/drivers/serial.c           | 33 +++++++++++++--
 system/src/modbus_rtu/rtu_serial_io.c | 14 +++++++
 4 files changed, 87 insertions(+), 23 deletions(-)

diff --git a/.cproject b/.cproject
index f4cce13..484ea0a 100644
--- a/.cproject
+++ b/.cproject
@@ -14,7 +14,7 @@
 				</extensions>
 			</storageModule>
 			<storageModule moduleId="cdtBuildSystem" version="4.0.0">
-				<configuration artifactName="${ProjName}" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.debug" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.827603628" name="Debug" optionalBuildProperties="" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug">
+				<configuration artifactName="${ProjName}" buildArtefactType="org.eclipse.cdt.build.core.buildArtefactType.exe" buildProperties="org.eclipse.cdt.build.core.buildArtefactType=org.eclipse.cdt.build.core.buildArtefactType.exe,org.eclipse.cdt.build.core.buildType=org.eclipse.cdt.build.core.buildType.debug" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug.827603628" name="Debug" optionalBuildProperties="org.eclipse.cdt.docker.launcher.containerbuild.property.selectedvolumes=,org.eclipse.cdt.docker.launcher.containerbuild.property.volumes=" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.debug">
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@@ -30,7 +30,7 @@
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+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family.1103879624" name="Arm family (-mcpu)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family" useByScannerDiscovery="false" value="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.mcpu.cortex-m3" valueType="enumerated"/>
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+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.id.510385311" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.id" useByScannerDiscovery="false" value="1287942917" valueType="string"/>
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 							<builder buildPath="${workspace_loc:/proba3-vldiscovery}/Debug" id="ilg.gnuarmeclipse.managedbuild.cross.builder.1339872385" keepEnvironmentInBuildfile="false" managedBuildOn="true" name="Gnu Make Builder" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
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@@ -56,7 +57,6 @@
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 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="TRACE"/>
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -74,7 +74,6 @@
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 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="TRACE"/>
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -97,7 +96,6 @@
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 									<listOptionValue builtIn="false" value="DEBUG"/>
 									<listOptionValue builtIn="false" value="TRACE"/>
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -117,6 +115,7 @@
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 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.usenewlibnano.1604810418" name="Use newlib-nano (--specs=nano.specs)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.usenewlibnano" value="true" valueType="boolean"/>
+								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.other.1276999053" name="Other linker flags" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.other" value="-u _printf_float" valueType="string"/>
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@@ -219,6 +218,20 @@
 				<memory section="IRAM1" size="0x2000" start="0x20000000" startup="0"/>
 				<memory section="IROM1" size="0x20000" start="0x08000000" startup="1"/>
 			</storageModule>
+			<storageModule moduleId="ilg.gnumcueclipse.managedbuild.packs">
+				<option id="cmsis.device.name" value="STM32F100RB"/>
+				<option id="cmsis.subfamily.name" value="STM32F100"/>
+				<option id="cmsis.family.name" value="STM32F1 Series"/>
+				<option id="cmsis.device.vendor.name" value="STMicroelectronics"/>
+				<option id="cmsis.device.vendor.id" value="13"/>
+				<option id="cmsis.device.pack.vendor" value="Keil"/>
+				<option id="cmsis.device.pack.name" value="STM32F1xx_DFP"/>
+				<option id="cmsis.device.pack.version" value="2.3.0"/>
+				<option id="cmsis.core.name" value="Cortex-M3"/>
+				<option id="cmsis.compiler.define" value="STM32F10X_MD_VL"/>
+				<memory section="IRAM1" size="0x00002000" start="0x20000000" startup="0"/>
+				<memory section="IROM1" size="0x00020000" start="0x08000000" startup="1"/>
+			</storageModule>
 		</cconfiguration>
 		<cconfiguration id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release.1905520139">
 			<storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release.1905520139" moduleId="org.eclipse.cdt.core.settings" name="Release">
@@ -233,7 +246,7 @@
 				</extensions>
 			</storageModule>
 			<storageModule moduleId="cdtBuildSystem" version="4.0.0">
-				<configuration artifactName="${ProjName}" 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.release" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release.1905520139" name="Release" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release">
+				<configuration artifactName="${ProjName}" 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.release" cleanCommand="${cross_rm} -rf" description="" id="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release.1905520139" name="Release" optionalBuildProperties="" parent="ilg.gnuarmeclipse.managedbuild.cross.config.elf.release">
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@@ -248,7 +261,7 @@
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-							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family.498480515" name="ARM family" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family" useByScannerDiscovery="false" value="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.mcpu.cortex-m3" valueType="enumerated"/>
+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family.498480515" name="Arm family (-mcpu)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.family" useByScannerDiscovery="false" value="ilg.gnuarmeclipse.managedbuild.cross.option.arm.target.mcpu.cortex-m3" valueType="enumerated"/>
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@@ -261,18 +274,20 @@
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+							<option id="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.id.666844916" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.toolchain.id" value="1287942917" valueType="string"/>
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+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.include.paths.1140371832" name="Include paths (-I)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.include.paths" useByScannerDiscovery="false" valueType="includePath">
 									<listOptionValue builtIn="false" value="&quot;../include&quot;"/>
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 									<listOptionValue builtIn="false" value="&quot;../system/include/cmsis&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;../system/include/stm32f1-stdperiph&quot;"/>
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-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.defs.1082382042" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.defs.1082382042" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.assembler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
+									<listOptionValue builtIn="false" value="DEBUG"/>
+									<listOptionValue builtIn="false" value="TRACE"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -280,15 +295,16 @@
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+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths.1107333580" name="Include paths (-I)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.include.paths" useByScannerDiscovery="false" valueType="includePath">
 									<listOptionValue builtIn="false" value="&quot;../include&quot;"/>
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 									<listOptionValue builtIn="false" value="&quot;../system/include&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;../system/include/cmsis&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;../system/include/stm32f1-stdperiph&quot;"/>
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-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.defs.1939755624" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.defs.1939755624" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.compiler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
+									<listOptionValue builtIn="false" value="DEBUG"/>
+									<listOptionValue builtIn="false" value="TRACE"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -296,7 +312,7 @@
 								<inputType id="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.input.1662655990" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.c.compiler.input"/>
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-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.include.paths.843080906" name="Include paths (-I)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.include.paths" useByScannerDiscovery="false" valueType="includePath">
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.include.paths.843080906" name="Include paths (-I)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.include.paths" useByScannerDiscovery="false" valueType="includePath">
 									<listOptionValue builtIn="false" value="&quot;../include&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;../system/include/aprs&quot;"/>
 									<listOptionValue builtIn="false" value="&quot;../system/include&quot;"/>
@@ -307,8 +323,9 @@
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 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.nousecxaatexit.973530473" name="Do not use _cxa_atexit() (-fno-use-cxa-atexit)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.nousecxaatexit" useByScannerDiscovery="true" value="true" valueType="boolean"/>
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.nothreadsafestatics.634083520" name="Do not use thread-safe statics (-fno-threadsafe-statics)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.nothreadsafestatics" useByScannerDiscovery="true" value="true" valueType="boolean"/>
-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.defs.410079682" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
-									<listOptionValue builtIn="false" value="OS_USE_TRACE_SEMIHOSTING_DEBUG"/>
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.defs.410079682" name="Defined symbols (-D)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.compiler.defs" useByScannerDiscovery="false" valueType="definedSymbols">
+									<listOptionValue builtIn="false" value="DEBUG"/>
+									<listOptionValue builtIn="false" value="TRACE"/>
 									<listOptionValue builtIn="false" value="STM32F10X_MD_VL"/>
 									<listOptionValue builtIn="false" value="USE_STDPERIPH_DRIVER"/>
 									<listOptionValue builtIn="false" value="HSE_VALUE=8000000"/>
@@ -317,29 +334,31 @@
 							</tool>
 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.c.linker.10849860" name="Cross ARM C Linker" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.c.linker">
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.gcsections.469232045" name="Remove unused sections (-Xlinker --gc-sections)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.gcsections" value="true" valueType="boolean"/>
-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.paths.1926371220" name="Library search path (-L)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.paths" valueType="libPaths">
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.paths.1926371220" name="Library search path (-L)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.paths" valueType="libPaths">
 									<listOptionValue builtIn="false" value="&quot;../ldscripts&quot;"/>
 								</option>
-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.scriptfile.1431253238" name="Script files (-T)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.scriptfile" valueType="stringList">
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.scriptfile.1431253238" name="Script files (-T)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.scriptfile" valueType="stringList">
 									<listOptionValue builtIn="false" value="mem.ld"/>
 									<listOptionValue builtIn="false" value="libs.ld"/>
 									<listOptionValue builtIn="false" value="sections.ld"/>
 								</option>
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.nostart.1643741066" name="Do not use standard start files (-nostartfiles)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.nostart" value="true" valueType="boolean"/>
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.usenewlibnano.304408116" name="Use newlib-nano (--specs=nano.specs)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.usenewlibnano" value="true" valueType="boolean"/>
+								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.other.948471670" name="Other linker flags" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.c.linker.other" value="-u _printf_float" valueType="string"/>
 							</tool>
 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker.1018533854" name="Cross ARM C++ Linker" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker">
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.gcsections.1346809662" name="Remove unused sections (-Xlinker --gc-sections)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.gcsections" useByScannerDiscovery="false" value="true" valueType="boolean"/>
-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths.441490646" name="Library search path (-L)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths" useByScannerDiscovery="false" valueType="libPaths">
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths.441490646" name="Library search path (-L)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.paths" useByScannerDiscovery="false" valueType="libPaths">
 									<listOptionValue builtIn="false" value="&quot;../ldscripts&quot;"/>
 								</option>
-								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.scriptfile.2127610610" name="Script files (-T)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.scriptfile" useByScannerDiscovery="false" valueType="stringList">
+								<option IS_BUILTIN_EMPTY="false" IS_VALUE_EMPTY="false" id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.scriptfile.2127610610" name="Script files (-T)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.scriptfile" useByScannerDiscovery="false" valueType="stringList">
 									<listOptionValue builtIn="false" value="mem.ld"/>
 									<listOptionValue builtIn="false" value="libs.ld"/>
 									<listOptionValue builtIn="false" value="sections.ld"/>
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 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.nostart.798552405" name="Do not use standard start files (-nostartfiles)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.nostart" useByScannerDiscovery="false" value="true" valueType="boolean"/>
 								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.usenewlibnano.711675791" name="Use newlib-nano (--specs=nano.specs)" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.usenewlibnano" useByScannerDiscovery="false" value="true" valueType="boolean"/>
+								<option id="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.other.481863150" name="Other linker flags" superClass="ilg.gnuarmeclipse.managedbuild.cross.option.cpp.linker.other" value="-u _printf_float" valueType="string"/>
 								<inputType id="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker.input.1290850385" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.cpp.linker.input">
 									<additionalInput kind="additionalinputdependency" paths="$(USER_OBJS)"/>
 									<additionalInput kind="additionalinput" paths="$(LIBS)"/>
diff --git a/system/include/drivers/serial.h b/system/include/drivers/serial.h
index 0cb0dad..d7e6575 100644
--- a/system/include/drivers/serial.h
+++ b/system/include/drivers/serial.h
@@ -55,6 +55,9 @@ typedef enum srl_error_reason {
 typedef struct srl_context_t {
 	USART_TypeDef *port;
 
+	uint32_t port_baurate;
+	uint8_t port_stopbits;
+
 	GPIO_TypeDef* te_port;
 	uint16_t te_pin;
 
@@ -148,6 +151,7 @@ extern "C" {
 
 
 void srl_init(srl_context_t *ctx, USART_TypeDef *port, uint8_t *rx_buffer, uint16_t rx_buffer_size, uint8_t *tx_buffer, uint16_t tx_buffer_size, uint32_t baudrate, uint8_t stop_bits);
+void srl_close(srl_context_t *ctx);
 uint8_t srl_send_data(srl_context_t *ctx, uint8_t* data, uint8_t mode, uint16_t leng, uint8_t internal_external);
 uint8_t srl_start_tx(srl_context_t *ctx, short leng);
 void srl_wait_for_tx_completion(srl_context_t *ctx);
diff --git a/system/src/drivers/serial.c b/system/src/drivers/serial.c
index 311a4bf..8be1952 100644
--- a/system/src/drivers/serial.c
+++ b/system/src/drivers/serial.c
@@ -50,9 +50,15 @@ void srl_init(
 	ctx->srl_tx_buf_ln = rx_buffer_size;
 	#endif
 
+	memset(ctx->srl_rx_buf_pointer, 0x00, ctx->srl_rx_buf_ln);
+	memset(ctx->srl_tx_buf_pointer, 0x00, ctx->srl_tx_buf_ln);
+
 	ctx->port = port;
-	ctx->te_port = 0;
-	ctx->te_pin = 0;
+	ctx->port_baurate = baudrate;
+	ctx->port_stopbits = stop_bits;
+
+	//ctx->te_port = 0;
+	//ctx->te_pin = 0;
 
 	ctx->srl_tx_start_time = 0xFFFFFFFFu;
 
@@ -93,6 +99,23 @@ void srl_init(
 
 	ctx->srl_rx_timeout_calc_started = 0;
 	ctx->srl_rx_idle_counter = 0;
+
+	ctx->srl_rx_start_time = 0;
+	ctx->srl_rx_waiting_start_time = 0;
+
+	ctx->srl_rx_timeout_enable = 0;
+	ctx->srl_rx_timeout_waiting_enable = 0;
+}
+
+void srl_close(srl_context_t *ctx) {
+	USART_DeInit(ctx->port);
+
+	if (ctx->te_port != NULL && ctx->te_pin != 0) {
+		GPIO_ResetBits(ctx->te_port, ctx->te_pin);
+	}
+
+	ctx->srl_rx_state = SRL_RX_NOT_CONFIG;
+	ctx->srl_tx_state = SRL_TX_NOT_CONFIG;
 }
 
 // this function shall be called in 10ms periods by some timer to check the timeout
@@ -446,6 +469,7 @@ uint8_t srl_receive_data_with_callback(srl_context_t *ctx, srl_rx_termination_ca
 			ctx->srl_rx_state = SRL_RXING;
 			ctx->port->CR1 |= USART_CR1_RE;					// uruchamianie odbiornika
 			ctx->port->CR1 |= USART_CR1_RXNEIE;
+			ctx->port->CR1 |= USART_CR1_IDLEIE;
 
 			ctx->srl_rx_waiting_start_time = master_time;
 			ctx->srl_rx_start_time = master_time;
@@ -467,7 +491,9 @@ void srl_irq_handler(srl_context_t *ctx) {
 	// local variable to store
 	uint8_t value = 0;
 
-	if ((ctx->port->SR & USART_SR_ORE) == USART_SR_IDLE) {
+	if ((ctx->port->SR & USART_SR_IDLE) == USART_SR_IDLE) {
+		ctx->srl_garbage_storage = (uint8_t)ctx->port->DR;
+
 		ctx->srl_rx_idle_counter++;
 	}
 
@@ -572,6 +598,7 @@ void srl_irq_handler(srl_context_t *ctx) {
 					// disabling UART receiver and its interrupt
 					ctx->port->CR1 &= (0xFFFFFFFF ^ USART_CR1_RE);
 					ctx->port->CR1 &= (0xFFFFFFFF ^ USART_CR1_RXNEIE);
+					ctx->port->CR1 &= (0xFFFFFFFF ^ USART_CR1_IDLEIE);
 				}
 
 				break;
diff --git a/system/src/modbus_rtu/rtu_serial_io.c b/system/src/modbus_rtu/rtu_serial_io.c
index b4024d8..b99c945 100644
--- a/system/src/modbus_rtu/rtu_serial_io.c
+++ b/system/src/modbus_rtu/rtu_serial_io.c
@@ -182,6 +182,15 @@ int32_t rtu_serial_pool(rtu_pool_queue_t* queue, srl_context_t* serial_context)
 	switch (rtu_pool) {
 		case RTU_POOL_IDLE: {
 
+			srl_init(	serial_context,
+						serial_context->port,
+						serial_context->srl_rx_buf_pointer,
+						serial_context->srl_rx_buf_ln,
+						serial_context->srl_tx_buf_pointer,
+						serial_context->srl_tx_buf_ln,
+						serial_context->port_baurate,
+						serial_context->port_stopbits);
+
 			// Enabling the timeout for Modbus-RTU.
 			// This timeout starts after first received byte and triggers if
 			// the slave will hang up and stop the transmission before the end of the frame
@@ -320,6 +329,8 @@ int32_t rtu_serial_pool(rtu_pool_queue_t* queue, srl_context_t* serial_context)
 				// get current time to start the inter-frame delay
 				rtu_time_of_last_receive = main_get_master_time();
 
+				srl_close(serial_context);
+
 			}
 
 			// in case of any error during data reception or the serial driver have fallen into unknown & unexpected
@@ -328,7 +339,10 @@ int32_t rtu_serial_pool(rtu_pool_queue_t* queue, srl_context_t* serial_context)
 				rte_wx_last_modbus_rx_error_timestamp = main_get_master_time();
 
 				rtu_pool = RTU_POOL_RECEIVE_ERROR;
+
+				srl_close(serial_context);
 			}
+
 			break;
 		}
 		case RTU_POOL_WAIT_AFTER_RECEIVE: {