pressure-wrapper: make p-w a separate project

2022-10-17 15:11:03 +03:00
parent fc013f8dd4
commit 4bbe567b41
16 changed files with 480 additions and 10 deletions
--- a/PressureWrapper/.cproject
+++ b/PressureWrapper/.cproject
@@ -0,0 +1,243 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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+					<externalSetting>
+						<entry flags="VALUE_WORKSPACE_PATH" kind="includePath" name="/PressureWrapper"/>
+						<entry flags="VALUE_WORKSPACE_PATH" kind="libraryPath" name="/PressureWrapper/Debug"/>
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+									<listOptionValue builtIn="false" value="&quot;${workspace_loc://inc}&quot;"/>
+								</option>
+								<option id="com.crt.advproject.gas.hdrlib.1310058002" superClass="com.crt.advproject.gas.hdrlib" value="Newlib" valueType="enumerated"/>
+								<option id="com.crt.advproject.gas.specs.1543656455" superClass="com.crt.advproject.gas.specs" value="com.crt.advproject.gas.specs.newlib" valueType="enumerated"/>
+								<inputType id="cdt.managedbuild.tool.gnu.assembler.input.1199418080" superClass="cdt.managedbuild.tool.gnu.assembler.input"/>
+								<inputType id="com.crt.advproject.assembler.input.1457430942" name="Additional Assembly Source Files" superClass="com.crt.advproject.assembler.input"/>
+							</tool>
+							<tool id="com.crt.advproject.ar.lib.release.953011998" name="MCU Archiver" superClass="com.crt.advproject.ar.lib.release"/>
+						</toolChain>
+					</folderInfo>
+					<sourceEntries>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="inc"/>
+						<entry flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name="src"/>
+					</sourceEntries>
+				</configuration>
+			</storageModule>
+			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
+		</cconfiguration>
+	</storageModule>
+	<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+		<project id="PressureWrapper.com.crt.advproject.projecttype.lib.2060295894" name="Static Library" projectType="com.crt.advproject.projecttype.lib"/>
+	</storageModule>
+	<storageModule moduleId="scannerConfiguration">
+		<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
+	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.core.LanguageSettingsProviders"/>
+	<storageModule moduleId="com.crt.config">
+		<projectStorage>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
+&lt;TargetConfig&gt;
+&lt;Properties property_2="LPC15xx_256K.cfx" property_3="NXP" property_4="LPC1549" property_count="5" version="100300"/&gt;
+&lt;infoList vendor="NXP"&gt;
+&lt;info chip="LPC1549" connectscript="LPC15RunBootRomConnect.scp" flash_driver="LPC15xx_256K.cfx" match_id="0x0" name="LPC1549" resetscript="LPC15RunBootRomReset.scp" stub="crt_emu_cm3_gen"&gt;
+&lt;chip&gt;
+&lt;name&gt;LPC1549&lt;/name&gt;
+&lt;family&gt;LPC15xx&lt;/family&gt;
+&lt;vendor&gt;NXP (formerly Philips)&lt;/vendor&gt;
+&lt;reset board="None" core="Real" sys="Real"/&gt;
+&lt;clock changeable="TRUE" freq="12MHz" is_accurate="TRUE"/&gt;
+&lt;memory can_program="true" id="Flash" is_ro="true" type="Flash"/&gt;
+&lt;memory id="RAM" type="RAM"/&gt;
+&lt;memory id="Periph" is_volatile="true" type="Peripheral"/&gt;
+&lt;memoryInstance derived_from="Flash" id="MFlash256" location="0x0" size="0x40000"/&gt;
+&lt;memoryInstance derived_from="RAM" id="Ram0_16" location="0x2000000" size="0x4000"/&gt;
+&lt;memoryInstance derived_from="RAM" id="Ram1_16" location="0x2004000" size="0x4000"/&gt;
+&lt;memoryInstance derived_from="RAM" id="Ram2_4" location="0x2008000" size="0x1000"/&gt;
+&lt;/chip&gt;
+&lt;processor&gt;
+&lt;name gcc_name="cortex-m3"&gt;Cortex-M3&lt;/name&gt;
+&lt;family&gt;Cortex-M&lt;/family&gt;
+&lt;/processor&gt;
+&lt;/info&gt;
+&lt;/infoList&gt;
+&lt;/TargetConfig&gt;</projectStorage>
+	</storageModule>
+	<storageModule moduleId="refreshScope"/>
+	<storageModule moduleId="com.crt.advproject">
+		<boardId>LPCXpresso1549</boardId>
+	</storageModule>
+</cproject>
--- a/PressureWrapper/.project
+++ b/PressureWrapper/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>PressureWrapper</name>
+	<comment></comment>
+	<projects>
+		<project>lpc_chip_15xx</project>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+			<triggers>clean,full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+			<triggers>full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.cdt.core.cnature</nature>
+		<nature>org.eclipse.cdt.core.ccnature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+	</natures>
+</projectDescription>
--- a/PressureWrapper/Debug/makefile
+++ b/PressureWrapper/Debug/makefile
@@ -0,0 +1,78 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+-include ../makefile.init
+
+RM := rm -rf
+
+# All of the sources participating in the build are defined here
+-include sources.mk
+-include src/subdir.mk
+-include subdir.mk
+-include objects.mk
+
+ifneq ($(MAKECMDGOALS),clean)
+ifneq ($(strip $(CC_DEPS)),)
+-include $(CC_DEPS)
+endif
+ifneq ($(strip $(C++_DEPS)),)
+-include $(C++_DEPS)
+endif
+ifneq ($(strip $(C_UPPER_DEPS)),)
+-include $(C_UPPER_DEPS)
+endif
+ifneq ($(strip $(CXX_DEPS)),)
+-include $(CXX_DEPS)
+endif
+ifneq ($(strip $(CPP_DEPS)),)
+-include $(CPP_DEPS)
+endif
+ifneq ($(strip $(C_DEPS)),)
+-include $(C_DEPS)
+endif
+endif
+
+-include ../makefile.defs
+
+OPTIONAL_TOOL_DEPS := \
+$(wildcard ../makefile.defs) \
+$(wildcard ../makefile.init) \
+$(wildcard ../makefile.targets) \
+
+
+BUILD_ARTIFACT_NAME := PressureWrapper
+BUILD_ARTIFACT_EXTENSION := a
+BUILD_ARTIFACT_PREFIX := lib
+BUILD_ARTIFACT := $(BUILD_ARTIFACT_PREFIX)$(BUILD_ARTIFACT_NAME)$(if $(BUILD_ARTIFACT_EXTENSION),.$(BUILD_ARTIFACT_EXTENSION),)
+
+# Add inputs and outputs from these tool invocations to the build variables 
+
+# All Target
+all:
+	+@$(MAKE) --no-print-directory main-build && $(MAKE) --no-print-directory post-build
+
+# Main-build Target
+main-build: libPressureWrapper.a
+
+# Tool invocations
+libPressureWrapper.a: $(OBJS) $(USER_OBJS) makefile objects.mk $(OPTIONAL_TOOL_DEPS)
+	@echo 'Building target: $@'
+	@echo 'Invoking: MCU Archiver'
+	arm-none-eabi-ar -r  "libPressureWrapper.a" $(OBJS) $(USER_OBJS) $(LIBS)
+	@echo 'Finished building target: $@'
+	@echo ' '
+
+# Other Targets
+clean:
+	-$(RM) $(CC_DEPS)$(C++_DEPS)$(C_UPPER_DEPS)$(CXX_DEPS)$(OBJS)$(ARCHIVES)$(CPP_DEPS)$(C_DEPS) libPressureWrapper.a
+	-@echo ' '
+
+post-build:
+	-@echo 'Performing post-build steps'
+	-arm-none-eabi-size "libPressureWrapper.a" ; # arm-none-eabi-objdump -h -S "libPressureWrapper.a" >"libPressureWrapper.lss"
+	-@echo ' '
+
+.PHONY: all clean dependents post-build
+
+-include ../makefile.targets
--- a/PressureWrapper/Debug/objects.mk
+++ b/PressureWrapper/Debug/objects.mk
@@ -0,0 +1,8 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+USER_OBJS :=
+
+LIBS :=
+
--- a/PressureWrapper/Debug/sources.mk
+++ b/PressureWrapper/Debug/sources.mk
@@ -0,0 +1,28 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+C_UPPER_SRCS := 
+CXX_SRCS := 
+C++_SRCS := 
+OBJ_SRCS := 
+S_SRCS := 
+CC_SRCS := 
+ASM_SRCS := 
+CPP_SRCS := 
+C_SRCS := 
+S_UPPER_SRCS := 
+O_SRCS := 
+CC_DEPS := 
+C++_DEPS := 
+C_UPPER_DEPS := 
+CXX_DEPS := 
+OBJS := 
+ARCHIVES := 
+CPP_DEPS := 
+C_DEPS := 
+
+# Every subdirectory with source files must be described here
+SUBDIRS := \
+src \
+
--- a/PressureWrapper/Debug/src/I2C.su
+++ b/PressureWrapper/Debug/src/I2C.su
@@ -0,0 +1,14 @@
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/iocon_15xx.h:95:20:void Chip_IOCON_PinMuxSet(LPC_IOCON_T*, uint8_t, uint8_t, uint32_t)	24	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2c_common_15xx.h:238:20:void Chip_I2C_SetClockDiv(LPC_I2C_T*, uint32_t)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2cm_15xx.h:126:20:void Chip_I2CM_Enable(LPC_I2C_T*)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2cm_15xx.h:160:20:void Chip_I2CM_ClearStatus(LPC_I2C_T*, uint32_t)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2cm_15xx.h:172:20:bool Chip_I2CM_IsMasterPending(LPC_I2C_T*)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2cm_15xx.h:197:20:void Chip_I2CM_SendStart(LPC_I2C_T*)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/i2cm_15xx.h:237:20:void Chip_I2CM_WriteByte(LPC_I2C_T*, uint8_t)	16	static
+../src/I2C.cpp:43:1:I2C::I2C(const I2C_config&)	16	static
+../src/I2C.cpp:72:1:I2C::~I2C()	16	static
+../src/I2C.cpp:72:1:virtual I2C::~I2C()	16	static
+../src/I2C.cpp:76:6:bool I2C::write(uint8_t, uint8_t*, uint16_t)	32	static
+../src/I2C.cpp:81:6:bool I2C::read(uint8_t, uint8_t*, uint16_t)	32	static
+../src/I2C.cpp:87:6:bool I2C::transaction(uint8_t, uint8_t*, uint16_t, uint8_t*, uint16_t)	40	static
+../src/I2C.cpp:118:10:static uint32_t I2C::I2CM_XferBlocking(LPC_I2C_T*, I2CM_XFER_T*)	24	static
--- a/PressureWrapper/Debug/src/PressureWrapper.su
+++ b/PressureWrapper/Debug/src/PressureWrapper.su
@@ -0,0 +1,8 @@
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc/core_cm3.h:1335:22:void NVIC_DisableIRQ(IRQn_Type)	16	static
+/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/PressureWrapper/inc/I2C.h:18:2:I2C_config::I2C_config()	16	static
+../src/PressureWrapper.cpp:10:16:uint8_t crc8(uint8_t*, size_t)	24	static
+../src/PressureWrapper.cpp:24:1:PressureWrapper::PressureWrapper()	40	static
+../src/PressureWrapper.cpp:32:1:PressureWrapper::~PressureWrapper()	16	static
+../src/PressureWrapper.cpp:32:1:virtual PressureWrapper::~PressureWrapper()	16	static
+../src/PressureWrapper.cpp:37:5:int PressureWrapper::getPressure()	16	static
+../src/PressureWrapper.cpp:41:16:PRESSURE_DATA* PressureWrapper::getRawPressure()	32	static
--- a/PressureWrapper/Debug/src/subdir.mk
+++ b/PressureWrapper/Debug/src/subdir.mk
@@ -0,0 +1,27 @@
+################################################################################
+# Automatically-generated file. Do not edit!
+################################################################################
+
+# Add inputs and outputs from these tool invocations to the build variables 
+CPP_SRCS += \
+../src/I2C.cpp \
+../src/PressureWrapper.cpp 
+
+OBJS += \
+./src/I2C.o \
+./src/PressureWrapper.o 
+
+CPP_DEPS += \
+./src/I2C.d \
+./src/PressureWrapper.d 
+
+
+# Each subdirectory must supply rules for building sources it contributes
+src/%.o: ../src/%.cpp src/subdir.mk
+	@echo 'Building file: $<'
+	@echo 'Invoking: MCU C++ Compiler'
+	arm-none-eabi-c++ -DDEBUG -D__CODE_RED -D__NEWLIB__ -DCORE_M3 -D__USE_LPCOPEN -D__LPC15XX__ -I"/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/PressureWrapper/inc" -I"/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_board_nxp_lpcxpresso_1549/inc" -I"/home/tylen/Desktop/Programming/Projects_Metropolia/ESP-Ventilation/lpc_chip_15xx/inc" -O0 -fno-common -g3 -Wall -c -fmessage-length=0 -fno-builtin -ffunction-sections -fdata-sections -fno-rtti -fno-exceptions -fmerge-constants -fmacro-prefix-map="$(<D)/"= -mcpu=cortex-m3 -mthumb -fstack-usage -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@:%.o=%.o)" -MT"$(@:%.o=%.d)" -o "$@" "$<"
+	@echo 'Finished building: $<'
+	@echo ' '
+
+
--- a/PressureWrapper/inc/I2C.h
+++ b/PressureWrapper/inc/I2C.h
@@ -0,0 +1,33 @@
+/*
+ * I2C.h
+ *
+ *  Created on: 21.2.2016
+ *      Author: krl
+ */
+
+#ifndef I2C_H_
+#define I2C_H_
+
+#include "chip.h"
+
+struct I2C_config {
+	unsigned int device_number;
+	unsigned int speed;
+	unsigned int clock_divider;
+	unsigned int i2c_mode;
+	I2C_config(): device_number(0), speed(100000), clock_divider(40), i2c_mode(IOCON_SFI2C_EN) {};
+};
+
+class I2C {
+public:
+	I2C(const I2C_config &cfg);
+	virtual ~I2C();
+	bool transaction(uint8_t devAddr, uint8_t *txBuffPtr, uint16_t txSize, uint8_t *rxBuffPtr, uint16_t rxSize);
+	bool write(uint8_t devAddr, uint8_t *txBuffPtr, uint16_t txSize);
+	bool read(uint8_t devAddr, uint8_t *rxBuffPtr, uint16_t rxSize);
+private:
+	LPC_I2C_T *device;
+	static uint32_t I2CM_XferBlocking(LPC_I2C_T *pI2C, I2CM_XFER_T *xfer);
+};
+
+#endif /* I2C_H_ */
--- a/PressureWrapper/inc/PressureWrapper.h
+++ b/PressureWrapper/inc/PressureWrapper.h
@@ -0,0 +1,43 @@
+/*
+ * PressureWrapper.h
+ *
+ *  Created on: 5 Oct 2022
+ *      Author: evgenymeshcheryakov
+ */
+
+#ifndef PRESSUREWRAPPER_H_
+#define PRESSUREWRAPPER_H_
+
+#include "I2C.h"
+#include <cstdio>
+
+#define ADDRESS 0x40
+#define READADD 0x81
+#define WRITEADD 0x80
+
+typedef struct _PRESSURE{
+	uint8_t rBuffer[2];
+	uint8_t crc;
+}PRESSURE_DATA;
+
+class PressureWrapper
+{
+public:
+  PressureWrapper ();
+  /**
+   * @brief Get the Status object
+   *
+   * @return true
+   * @return false
+   */
+  int getPressure ();
+
+  virtual ~PressureWrapper ();
+
+private:
+  I2C *i2c;
+  PRESSURE_DATA data = {{0, 0}, 0};
+  PRESSURE_DATA* getRawPressure ();
+};
+
+#endif /* PRESSUREWRAPPER_H_ */
--- a/PressureWrapper/liblinks.xml
+++ b/PressureWrapper/liblinks.xml
@@ -0,0 +1,32 @@
+<!-- liblinks.xml
+
+     NXP LPCXpresso IDE "Smart update wizard" script file
+     When executed on a particular application project, will
+     add appropriate links to the specified library project.
+
+     Note that this script assumes that the application project
+     contains the standard 'Debug' and 'Release' build 
+     configurations.
+-->
+
+<project name="" update="true">
+	<setting id="all.compiler.inc">
+		<value>${MacroStart}workspace_loc:/${ProjName}/inc${MacroEnd}</value>
+        </setting>
+    <setting id="assembler.inc">
+		<value>${MacroStart}workspace_loc:/${ProjName}/inc${MacroEnd}</value>
+    </setting>
+	<setting id="linker.libs">
+		<value>${ProjName}</value>
+	</setting>
+	<setting id="linker.paths" buildType="Debug">
+		<value>${MacroStart}workspace_loc:/${ProjName}/Debug${MacroEnd}</value>
+	</setting>
+	<setting id="linker.paths" buildType="Release">
+		<value>${MacroStart}workspace_loc:/${ProjName}/Release${MacroEnd}</value>
+	</setting>
+	<requires msg="Library project `${ProjName}` not found">
+		<value>${ProjName}</value>
+	</requires>
+</project>
+
--- a/PressureWrapper/src/I2C.cpp
+++ b/PressureWrapper/src/I2C.cpp
@@ -0,0 +1,143 @@
+/*
+ * I2C.cpp
+ *
+ *  Created on: 21.2.2016
+ *      Author: krl
+ *      Based on example provided by NXP Semiconductors. See copyright notice below.
+ */
+
+/*
+ * @brief I2CM bus master example using polling mode
+ *
+ * @note
+ * Copyright(C) NXP Semiconductors, 2014
+ * All rights reserved.
+ *
+ * @par
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * LPC products.  This software is supplied "AS IS" without any warranties of
+ * any kind, and NXP Semiconductors and its licensor disclaim any and
+ * all warranties, express or implied, including all implied warranties of
+ * merchantability, fitness for a particular purpose and non-infringement of
+ * intellectual property rights.  NXP Semiconductors assumes no responsibility
+ * or liability for the use of the software, conveys no license or rights under any
+ * patent, copyright, mask work right, or any other intellectual property rights in
+ * or to any products. NXP Semiconductors reserves the right to make changes
+ * in the software without notification. NXP Semiconductors also makes no
+ * representation or warranty that such application will be suitable for the
+ * specified use without further testing or modification.
+ *
+ * @par
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, under NXP Semiconductors' and its
+ * licensor's relevant copyrights in the software, without fee, provided that it
+ * is used in conjunction with NXP Semiconductors microcontrollers.  This
+ * copyright, permission, and disclaimer notice must appear in all copies of
+ * this code.
+ */
+
+#include "../inc/I2C.h"
+
+
+I2C::I2C(const I2C_config &cfg): device(nullptr) {
+	if(cfg.device_number == 0) {
+		device = LPC_I2C0;
+		// board init must have been called before the pins can be configured
+		Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 22, IOCON_DIGMODE_EN | cfg.i2c_mode);
+		Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 23, IOCON_DIGMODE_EN | cfg.i2c_mode);
+		Chip_SWM_EnableFixedPin(SWM_FIXED_I2C0_SCL);
+		Chip_SWM_EnableFixedPin(SWM_FIXED_I2C0_SDA);
+	}
+	else {
+		// currently we support only I2C number 0
+	}
+
+	if(device) {
+		/* Enable I2C clock and reset I2C peripheral - the boot ROM does not
+	   do this */
+		Chip_I2C_Init(device);
+
+		/* Setup clock rate for I2C */
+		Chip_I2C_SetClockDiv(device, cfg.clock_divider);
+
+		/* Setup I2CM transfer rate */
+		Chip_I2CM_SetBusSpeed(device, cfg.speed);
+
+		/* Enable Master Mode */
+		Chip_I2CM_Enable(device);
+	}
+}
+
+I2C::~I2C() {
+	// TODO Auto-generated destructor stub
+}
+
+bool I2C::write(uint8_t devAddr, uint8_t *txBuffPtr, uint16_t txSize)
+{
+	return transaction(devAddr, txBuffPtr, txSize, nullptr, 0);
+}
+
+bool I2C::read(uint8_t devAddr, uint8_t *rxBuffPtr, uint16_t rxSize)
+{
+	return transaction(devAddr, nullptr, 0, rxBuffPtr, rxSize);
+}
+
+
+bool I2C::transaction(uint8_t devAddr, uint8_t *txBuffPtr, uint16_t txSize, uint8_t *rxBuffPtr, uint16_t rxSize) {
+	I2CM_XFER_T  i2cmXferRec;
+
+	// make sure that master is idle
+	while(!Chip_I2CM_IsMasterPending(LPC_I2C0));
+
+	/* Setup I2C transfer record */
+	i2cmXferRec.slaveAddr = devAddr;
+	i2cmXferRec.status = 0;
+	i2cmXferRec.txSz = txSize;
+	i2cmXferRec.rxSz = rxSize;
+	i2cmXferRec.txBuff = txBuffPtr;
+	i2cmXferRec.rxBuff = rxBuffPtr;
+
+	I2CM_XferBlocking(LPC_I2C0, &i2cmXferRec);
+	// Chip_I2CM_XferBlocking returns before stop condition is fully completed
+	// therefore we need to wait for master to be idle when doing back-to-back transactions (see beginning of the function)
+
+	/* Test for valid operation */
+	if (i2cmXferRec.status == I2CM_STATUS_OK) {
+		return true;
+	}
+	else {
+		return false;
+	}
+}
+
+/* Transmit and Receive data in master mode */
+/* This duplicates (and combines) the functionality of Chip_I2CM_Xfer and Chip_I2CM_XferBlocking with a modification
+ * that allows us to do a zero length write (needed to use honeywell humidity/temp sensor)
+ */
+uint32_t I2C::I2CM_XferBlocking(LPC_I2C_T *pI2C, I2CM_XFER_T *xfer)
+{
+	uint32_t ret = 0;
+	/* start transfer */
+
+	/* set the transfer status as busy */
+	xfer->status = I2CM_STATUS_BUSY;
+	/* Clear controller state. */
+	Chip_I2CM_ClearStatus(pI2C, I2C_STAT_MSTRARBLOSS | I2C_STAT_MSTSTSTPERR);
+	/* Write Address and RW bit to data register */
+	//Chip_I2CM_WriteByte(pI2C, (xfer->slaveAddr << 1) | (xfer->txSz == 0)); // original NXP version
+	 // krl : both read and write lenght is 0 --> write (for honeywell temp sensor)
+	Chip_I2CM_WriteByte(pI2C, (xfer->slaveAddr << 1) | (xfer->txSz == 0 && xfer->rxSz != 0));
+	/* Enter to Master Transmitter mode */
+	Chip_I2CM_SendStart(pI2C);
+
+	while (ret == 0) {
+		/* wait for status change interrupt */
+		while (!Chip_I2CM_IsMasterPending(pI2C)) {}
+		/* call state change handler */
+		ret = Chip_I2CM_XferHandler(pI2C, xfer);
+	}
+	return ret;
+}
+
+
--- a/PressureWrapper/src/PressureWrapper.cpp
+++ b/PressureWrapper/src/PressureWrapper.cpp
@@ -0,0 +1,47 @@
+/*
+ * PressureWrapper.cpp
+ *
+ *  Created on: 5 Oct 2022
+ *      Author: evgenymeshcheryakov
+ */
+
+#include "PressureWrapper.h"
+
+static uint8_t crc8(uint8_t *data, size_t size) {
+	uint8_t crc = 0x00;
+	uint8_t byteCtr;
+	//calculates 8-Bit checksum with given polynomial
+	for (byteCtr = 0; byteCtr < size; ++byteCtr) {
+		crc ^= (data[byteCtr]);
+		for (uint8_t bit = 8; bit > 0; --bit) {
+			if (crc & 0x80) crc = (crc << 1) ^ 0x131; //P(x)=x^8+x^5+x^4+1 = 0001 0011 0001
+			else crc = (crc << 1);
+		}
+	}
+	return crc;
+}
+
+PressureWrapper::PressureWrapper ()
+{
+	NVIC_DisableIRQ(I2C0_IRQn);
+	I2C_config config;
+	I2C i2c_c(config);
+	i2c = &i2c_c;
+}
+
+PressureWrapper::~PressureWrapper ()
+{
+  // TODO Auto-generated destructor stub
+}
+
+int PressureWrapper::getPressure() {
+
+}
+
+PRESSURE_DATA* PressureWrapper::getRawPressure () {
+	uint8_t getMeasurementComm = 0xF1;
+	i2c->transaction(0x40, &getMeasurementComm, 1, data.rBuffer, 3);
+	return &data;
+}
+
+