Added Code Composer Workspace.

Implemented a clean! CCS git ignore.

9 files changed, 1062 insertions, 0 deletions

diff --git a/Software/Code_Composer/twine_usblib/.ccsproject b/Software/Code_Composer/twine_usblib/.ccsproject
new file mode 100644
index 000000000..83cc5ba74
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/.ccsproject
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<?ccsproject version="1.0"?>
+<projectOptions>
+	<ccsVersion value="7.2.0"/>
+	<deviceVariant value="Cortex M.TM4C129XNCZAD"/>
+	<deviceFamily value="TMS470"/>
+	<deviceEndianness value="little"/>
+	<codegenToolVersion value="16.9.4.LTS"/>
+	<isElfFormat value="true"/>
+	<createSlaveProjects value=""/>
+	<templateProperties value="id=com.ti.common.project.core.emptyProjectTemplate,"/>
+	<filesToOpen value=""/>
+	<isTargetManual value="false"/>
+</projectOptions>
diff --git a/Software/Code_Composer/twine_usblib/.cproject b/Software/Code_Composer/twine_usblib/.cproject
new file mode 100644
index 000000000..5c4201208
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/.cproject
@@ -0,0 +1,147 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<?fileVersion 4.0.0?><cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
+	<storageModule configRelations="2" moduleId="org.eclipse.cdt.core.settings">
+		<cconfiguration id="com.ti.ccstudio.buildDefinitions.TMS470.Debug.1712794256">
+			<storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="com.ti.ccstudio.buildDefinitions.TMS470.Debug.1712794256" moduleId="org.eclipse.cdt.core.settings" name="Debug">
+				<externalSettings/>
+				<extensions>
+					<extension id="com.ti.ccstudio.binaryparser.CoffParser" point="org.eclipse.cdt.core.BinaryParser"/>
+					<extension id="org.eclipse.cdt.core.GmakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.CoffErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.AsmErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.LinkErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+				</extensions>
+			</storageModule>
+			<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+				<configuration artifactExtension="lib" artifactName="${ProjName}" buildProperties="" cleanCommand="${CG_CLEAN_CMD}" description="" id="com.ti.ccstudio.buildDefinitions.TMS470.Debug.1712794256" name="Debug" parent="com.ti.ccstudio.buildDefinitions.TMS470.Debug">
+					<folderInfo id="com.ti.ccstudio.buildDefinitions.TMS470.Debug.1712794256." name="/" resourcePath="">
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+								<listOptionValue builtIn="false" value="PRODUCTS="/>
+								<listOptionValue builtIn="false" value="PRODUCT_MACRO_IMPORTS={}"/>
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+							<option id="com.ti.ccstudio.buildDefinitions.core.OPT_CODEGEN_VERSION.1818576343" name="Compiler version" superClass="com.ti.ccstudio.buildDefinitions.core.OPT_CODEGEN_VERSION" value="16.3.0.STS" valueType="string"/>
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+							<builder buildPath="${BuildDirectory}" id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.library.builderDebug.1884472642" keepEnvironmentInBuildfile="false" name="GNU Make" parallelBuildOn="true" parallelizationNumber="optimal" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.library.builderDebug"/>
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+									<listOptionValue builtIn="false" value="&quot;${SW_ROOT}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${workspace_loc:/${ProjName}}&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;C:\ti\xdctools_3_32_00_06_core\packages&quot;"/>
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+									<listOptionValue builtIn="false" value="&quot;${SW_ROOT}/examples/boards/dk-tm4c129x&quot;"/>
+									<listOptionValue builtIn="false" value="&quot;${CG_TOOL_ROOT}/include&quot;"/>
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+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DEBUGGING_MODEL.701920381" name="Debugging model" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DEBUGGING_MODEL" value="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DEBUGGING_MODEL.SYMDEBUG__DWARF" valueType="enumerated"/>
+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DIAG_WARNING.18973611" name="Treat diagnostic &lt;id&gt; as warning (--diag_warning, -pdsw)" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DIAG_WARNING" valueType="stringList">
+									<listOptionValue builtIn="false" value="225"/>
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+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DIAG_WRAP.651875503" name="Wrap diagnostic messages (--diag_wrap)" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DIAG_WRAP" value="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DIAG_WRAP.off" valueType="enumerated"/>
+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DISPLAY_ERROR_NUMBER.2072182850" name="Emit diagnostic identifier numbers (--display_error_number, -pden)" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compilerID.DISPLAY_ERROR_NUMBER" value="true" valueType="boolean"/>
+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__C_SRCS.62354248" name="C Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__C_SRCS"/>
+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__CPP_SRCS.72641058" name="C++ Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__CPP_SRCS"/>
+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__ASM_SRCS.533685650" name="Assembly Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__ASM_SRCS"/>
+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__ASM2_SRCS.1840927405" name="Assembly Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.compiler.inputType__ASM2_SRCS"/>
+							</tool>
+							<tool id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.library.librarianDebug.933538578" name="ARM Archiver" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.library.librarianDebug">
+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.3.archiverID.OUTPUT_FILE.1915375055" name="Output file" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.3.archiverID.OUTPUT_FILE" value="&quot;${ProjName}.lib&quot;" valueType="string"/>
+							</tool>
+						</toolChain>
+					</folderInfo>
+					<sourceEntries>
+						<entry excluding="tm4c129xnczad.cmd" flags="VALUE_WORKSPACE_PATH|RESOLVED" kind="sourcePath" name=""/>
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+				</configuration>
+			</storageModule>
+			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
+		</cconfiguration>
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+				<externalSettings/>
+				<extensions>
+					<extension id="com.ti.ccstudio.binaryparser.CoffParser" point="org.eclipse.cdt.core.BinaryParser"/>
+					<extension id="org.eclipse.cdt.core.GmakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.CoffErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.AsmErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="com.ti.ccstudio.errorparser.LinkErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+				</extensions>
+			</storageModule>
+			<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+				<configuration artifactExtension="lib" artifactName="${ProjName}" buildProperties="" cleanCommand="${CG_CLEAN_CMD}" description="" id="com.ti.ccstudio.buildDefinitions.TMS470.Release.935848617" name="Release" parent="com.ti.ccstudio.buildDefinitions.TMS470.Release">
+					<folderInfo id="com.ti.ccstudio.buildDefinitions.TMS470.Release.935848617." name="/" resourcePath="">
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+							<builder buildPath="${BuildDirectory}" id="com.ti.ccstudio.buildDefinitions.TMS470_16.9.library.builderRelease.595631804" keepEnvironmentInBuildfile="false" name="GNU Make" parallelBuildOn="true" parallelizationNumber="optimal" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.9.library.builderRelease"/>
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+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compilerID.INCLUDE_PATH.1916299080" name="Add dir to #include search path (--include_path, -I)" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compilerID.INCLUDE_PATH" valueType="includePath">
+									<listOptionValue builtIn="false" value="&quot;${PROJECT_ROOT}&quot;"/>
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+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compiler.inputType__C_SRCS.1325065408" name="C Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compiler.inputType__C_SRCS"/>
+								<inputType id="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compiler.inputType__CPP_SRCS.1367371847" name="C++ Sources" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.9.compiler.inputType__CPP_SRCS"/>
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+							</tool>
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+								<option id="com.ti.ccstudio.buildDefinitions.TMS470_16.9.archiverID.OUTPUT_FILE.668849754" name="Output file" superClass="com.ti.ccstudio.buildDefinitions.TMS470_16.9.archiverID.OUTPUT_FILE" useByScannerDiscovery="false" value="&quot;${ProjName}.lib&quot;" valueType="string"/>
+							</tool>
+						</toolChain>
+					</folderInfo>
+				</configuration>
+			</storageModule>
+			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
+		</cconfiguration>
+	</storageModule>
+	<storageModule moduleId="org.eclipse.cdt.core.LanguageSettingsProviders"/>
+	<storageModule moduleId="cdtBuildSystem" version="4.0.0">
+		<project id="twine_usblib.com.ti.ccstudio.buildDefinitions.TMS470.ProjectType.457322155" name="ARM" projectType="com.ti.ccstudio.buildDefinitions.TMS470.ProjectType"/>
+	</storageModule>
+	<storageModule moduleId="scannerConfiguration"/>
+	<storageModule moduleId="org.eclipse.cdt.core.language.mapping">
+		<project-mappings>
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+			<content-type-mapping configuration="" content-type="org.eclipse.cdt.core.cHeader" language="com.ti.ccstudio.core.TIGCCLanguage"/>
+			<content-type-mapping configuration="" content-type="org.eclipse.cdt.core.cSource" language="com.ti.ccstudio.core.TIGCCLanguage"/>
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+			<content-type-mapping configuration="" content-type="org.eclipse.cdt.core.cxxSource" language="com.ti.ccstudio.core.TIGPPLanguage"/>
+		</project-mappings>
+	</storageModule>
+</cproject>
diff --git a/Software/Code_Composer/twine_usblib/.project b/Software/Code_Composer/twine_usblib/.project
new file mode 100644
index 000000000..3d83dab3e
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/.project
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>twine_usblib</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder</name>
+			<triggers>full,incremental,</triggers>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>com.ti.ccstudio.core.ccsNature</nature>
+		<nature>org.eclipse.cdt.core.cnature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.managedBuildNature</nature>
+		<nature>org.eclipse.cdt.core.ccnature</nature>
+		<nature>org.eclipse.cdt.managedbuilder.core.ScannerConfigNature</nature>
+	</natures>
+	<linkedResources>
+		<link>
+			<name>utils/ustdlib.c</name>
+			<type>1</type>
+			<locationURI>SW_ROOT/utils/ustdlib.c</locationURI>
+		</link>
+	</linkedResources>
+	<variableList>
+		<variable>
+			<name>SW_ROOT</name>
+			<value>$%7BTI_PRODUCTS_DIR%7D/TivaWare_C_Series-2.1.4.178</value>
+		</variable>
+	</variableList>
+</projectDescription>
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_adapter.c b/Software/Code_Composer/twine_usblib/usb_serial_adapter.c
new file mode 100644
index 000000000..9cf3ef3b4
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_adapter.c
@@ -0,0 +1,479 @@
+//Twine USB Serial Communication Library
+
+//! Assuming you installed TivaWare in the default directory, a
+//! driver information (INF) file for use with Windows XP, Windows Vista and
+//! Windows7 can be found in C:/ti/TivaWare-for-C-Series/windows_drivers.
+//! For Windows 2000, the required INF file is in
+//! C:/ti/TivaWare-for-C-Series/windows_drivers/win2K.
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "inc/hw_ints.h"
+#include "inc/hw_memmap.h"
+#include "inc/hw_types.h"
+#include "inc/hw_uart.h"
+#include "driverlib/debug.h"
+#include "driverlib/gpio.h"
+#include "driverlib/interrupt.h"
+#include "driverlib/sysctl.h"
+#include "driverlib/systick.h"
+#include "driverlib/timer.h"
+#include "driverlib/uart.h"
+#include "driverlib/usb.h"
+#include "driverlib/rom.h"
+#include "driverlib/rom_map.h"
+#include "usblib/usblib.h"
+#include "usblib/usbcdc.h"
+#include "usblib/usb-ids.h"
+#include "usblib/device/usbdevice.h"
+#include "usblib/device/usbdcdc.h"
+#include <ti/sysbios/knl/Task.h>
+#include "utils/ustdlib.h"
+#include "usb_serial_structs.h"
+#include "usb_serial_buffer.h"
+#include "usb_serial_adapter.h"
+
+static SerialBuffer inBuffer;
+
+//*****************************************************************************
+//
+// This function is called whenever serial data is received from the UART.
+// It is passed the accumulated error flags from each character received in
+// this interrupt and determines from them whether or not an interrupt
+// notification to the host is required.
+//
+// If a notification is required and the control interrupt endpoint is idle,
+// we send the notification immediately.  If the endpoint is not idle, we
+// accumulate the errors in a global variable which will be checked on
+// completion of the previous notification and used to send a second one
+// if necessary.
+//
+//*****************************************************************************
+void CheckForSerialStateChange(const tUSBDCDCDevice *psDevice, uint32_t ui32Errors)
+{
+    uint16_t ui16SerialState;
+
+    //
+    // Clear our USB serial state.  Since we are faking the handshakes, always
+    // set the TXCARRIER (DSR) and RXCARRIER (DCD) bits.
+    //
+    ui16SerialState = USB_CDC_SERIAL_STATE_TXCARRIER |
+                      USB_CDC_SERIAL_STATE_RXCARRIER;
+
+    //
+    // Are any error bits set?
+    //
+    if(ui32Errors)
+    {
+        //
+        // At least one error is being notified so translate from our hardware
+        // error bits into the correct state markers for the USB notification.
+        //
+        if(ui32Errors & UART_DR_OE)
+        {
+            ui16SerialState |= USB_CDC_SERIAL_STATE_OVERRUN;
+        }
+
+        if(ui32Errors & UART_DR_PE)
+        {
+            ui16SerialState |= USB_CDC_SERIAL_STATE_PARITY;
+        }
+
+        if(ui32Errors & UART_DR_FE)
+        {
+            ui16SerialState |= USB_CDC_SERIAL_STATE_FRAMING;
+        }
+
+        if(ui32Errors & UART_DR_BE)
+        {
+            ui16SerialState |= USB_CDC_SERIAL_STATE_BREAK;
+        }
+
+        //
+        // Call the CDC driver to notify the state change.
+        //
+        USBDCDCSerialStateChange((void *)psDevice, ui16SerialState);
+    }
+}
+
+//*****************************************************************************
+//
+// Set the state of the RS232 RTS and DTR signals.
+//
+//*****************************************************************************
+void SetControlLineState(uint16_t ui16State)
+{
+    //
+    // TODO: If configured with GPIOs controlling the handshake lines,
+    // set them appropriately depending upon the flags passed in the wValue
+    // field of the request structure passed.
+    //
+}
+
+//*****************************************************************************
+//
+// Get the communication parameters in use on the UART.
+//
+//*****************************************************************************
+void GetLineCoding(tLineCoding *psLineCoding)
+{
+    psLineCoding->ui32Rate = 9600;
+    psLineCoding->ui8Databits = 8;
+    psLineCoding->ui8Parity = USB_CDC_PARITY_NONE;
+    psLineCoding->ui8Stop = USB_CDC_STOP_BITS_1;
+}
+
+//*****************************************************************************
+//
+// Handles CDC driver notifications related to control and setup of the device.
+//
+// \param pvCBData is the client-supplied callback pointer for this channel.
+// \param ulEvent identifies the event we are being notified about.
+// \param ulMsgValue is an event-specific value.
+// \param pvMsgData is an event-specific pointer.
+//
+// This function is called by the CDC driver to perform control-related
+// operations on behalf of the USB host.  These functions include setting
+// and querying the serial communication parameters, setting handshake line
+// states and sending break conditions.
+//
+// \return The return value is event-specific.
+//
+//*****************************************************************************
+uint32_t ControlHandler(void *pvCBData, uint32_t ui32Event, uint32_t ui32MsgValue, void *pvMsgData)
+{
+    //
+    // Which event are we being asked to process?
+    //
+    switch(ui32Event)
+    {
+        //
+        // We are connected to a host and communication is now possible.
+        //
+        case USB_EVENT_CONNECTED:
+        {
+            //
+            // Now connected and ready for normal operation.
+            //
+            HWREGBITW(&g_ui32Flags, FLAG_USB_CONFIGURED) = 1;
+
+            //
+            // Flush our buffers.
+            //
+            USBBufferFlush(&g_sTxBuffer);
+            USBBufferFlush(&g_sRxBuffer);
+
+            //TODO: Notify connection!
+
+            //
+            // Set the command status update flag.
+            //
+            HWREGBITW(&g_ui32Flags, FLAG_STATUS_UPDATE) = 1;
+
+            break;
+        }
+
+        //
+        // The host has disconnected.
+        //
+        case USB_EVENT_DISCONNECTED:
+        {
+            //
+            // No longer connected.
+            //
+            HWREGBITW(&g_ui32Flags, FLAG_USB_CONFIGURED) = 0;
+
+            //TODO: Notify disconnection!
+
+            //
+            // Set the command status update flag.
+            //
+            HWREGBITW(&g_ui32Flags, FLAG_STATUS_UPDATE) = 1;
+
+            break;
+        }
+
+        //
+        // Return the current serial communication parameters.
+        //
+        case USBD_CDC_EVENT_GET_LINE_CODING:
+        {
+            GetLineCoding(pvMsgData);
+            break;
+        }
+
+        //
+        // Set the current serial communication parameters.
+        //
+        case USBD_CDC_EVENT_SET_LINE_CODING:
+        {
+            GetLineCoding(pvMsgData);
+            break;
+        }
+
+        //
+        // Set the current serial communication parameters.
+        //
+        case USBD_CDC_EVENT_SET_CONTROL_LINE_STATE:
+        {
+            SetControlLineState((uint16_t)ui32MsgValue);
+            break;
+        }
+
+        //
+        // Send a break condition on the serial line.
+        //
+        case USBD_CDC_EVENT_SEND_BREAK:
+        {
+            break;
+        }
+
+        //
+        // Clear the break condition on the serial line.
+        //
+        case USBD_CDC_EVENT_CLEAR_BREAK:
+        {
+            break;
+        }
+
+        //
+        // Ignore SUSPEND and RESUME for now.
+        //
+        case USB_EVENT_SUSPEND:
+        case USB_EVENT_RESUME:
+        {
+            break;
+        }
+
+        //
+        // We don't expect to receive any other events.  Ignore any that show
+        // up in a release build or hang in a debug build.
+        //
+        default:
+        {
+#ifdef DEBUG
+            while(1);
+#else
+            break;
+#endif
+        }
+
+    }
+
+    return(0);
+}
+
+//*****************************************************************************
+//
+// Handles CDC driver notifications related to the transmit channel (data to
+// the USB host).
+//
+// \param pvCBData is the client-supplied callback pointer for this channel.
+// \param ui32Event identifies the event we are being notified about.
+// \param ui32MsgValue is an event-specific value.
+// \param pvMsgData is an event-specific pointer.
+//
+// This function is called by the CDC driver to notify us of any events
+// related to operation of the transmit data channel (the IN channel carrying
+// data to the USB host).
+//
+// \return The return value is event-specific.
+//
+//*****************************************************************************
+uint32_t TxHandler(void *pvCBData, uint32_t ui32Event, uint32_t ui32MsgValue, void *pvMsgData)
+{
+    //
+    // Which event have we been sent?
+    //
+    switch(ui32Event)
+    {
+        case USB_EVENT_TX_COMPLETE:
+        {
+            //
+            // Since we are using the USBBuffer, we don't need to do anything
+            // here.
+            //
+            break;
+        }
+
+        //
+        // We don't expect to receive any other events.  Ignore any that show
+        // up in a release build or hang in a debug build.
+        //
+        default:
+        {
+#ifdef DEBUG
+            while(1);
+#else
+            break;
+#endif
+        }
+    }
+    return(0);
+}
+
+//*****************************************************************************
+//
+// Handles CDC driver notifications related to the receive channel (data from
+// the USB host).
+//
+// \param pvCBData is the client-supplied callback data value for this channel.
+// \param ui32Event identifies the event we are being notified about.
+// \param ui32MsgValue is an event-specific value.
+// \param pvMsgData is an event-specific pointer.
+//
+// This function is called by the CDC driver to notify us of any events
+// related to operation of the receive data channel (the OUT channel carrying
+// data from the USB host).
+//
+// \return The return value is event-specific.
+//
+//*****************************************************************************
+uint32_t RxHandler(void *pvCBData, uint32_t ui32Event, uint32_t ui32MsgValue,void *pvMsgData)
+{
+    //
+    // Which event are we being sent?
+    //
+    switch(ui32Event)
+    {
+        //
+        // A new packet has been received.
+        //
+        case USB_EVENT_RX_AVAILABLE:
+        {
+            //
+            // Feed some characters into the UART TX FIFO and enable the
+            // interrupt so we are told when there is more space.
+            //
+            handleRx();
+            break;
+        }
+
+        //
+        // We are being asked how much unprocessed data we have still to
+        // process. We return 0 if the UART is currently idle or 1 if it is
+        // in the process of transmitting something. The actual number of
+        // bytes in the UART FIFO is not important here, merely whether or
+        // not everything previously sent to us has been transmitted.
+        //
+        case USB_EVENT_DATA_REMAINING:
+        {
+            //
+            // Get the number of bytes in the buffer and add 1 if some data
+            // still has to clear the transmitter.
+            return(0);
+        }
+
+        //
+        // We are being asked to provide a buffer into which the next packet
+        // can be read. We do not support this mode of receiving data so let
+        // the driver know by returning 0. The CDC driver should not be sending
+        // this message but this is included just for illustration and
+        // completeness.
+        //
+        case USB_EVENT_REQUEST_BUFFER:
+        {
+            return(0);
+        }
+
+        //
+        // We don't expect to receive any other events.  Ignore any that show
+        // up in a release build or hang in a debug build.
+        //
+        default:
+#ifdef DEBUG
+            while(1);
+#else
+            break;
+#endif
+    }
+
+    return(0);
+}
+
+void handleRx(void)
+{
+    uint32_t ui32Read;
+    uint8_t ui8Char;
+
+    do
+    {
+        ui32Read = USBBufferRead((tUSBBuffer *)&g_sRxBuffer, &ui8Char, 1);
+
+        // Did we get a character?
+        if(ui32Read)
+        {
+            insertArray(&inBuffer, ui8Char);
+            g_RxCount++;
+        }
+
+    } while(ui32Read);
+}
+
+//Execute this function on UART0 Interrupt;
+void InitUSB(void)
+{
+    CheckForSerialStateChange(&g_sCDCDevice, 0);
+}
+
+//Initialize USB.
+void StartUSB(uint32_t ui32SysClock)
+{
+    uint32_t ui32PLLRate, ui32RxCount;
+
+    ui32RxCount = 0;
+    g_RxCount = 0;
+
+    initArray(&inBuffer, 1);
+
+    // Save the PLL rate used by this application.
+    SysCtlVCOGet(SYSCTL_XTAL_25MHZ, &ui32PLLRate);
+
+    // Not configured initially.
+    g_ui32Flags = 0;
+
+    // Initialize the transmit and receive buffers.
+    USBBufferInit(&g_sTxBuffer);
+    USBBufferInit(&g_sRxBuffer);
+
+    // Set the USB stack mode to Device mode with VBUS monitoring.
+    USBStackModeSet(0, eUSBModeDevice, 0);
+
+    // Tell the USB library the CPU clock and the PLL frequency.  This is a
+    // new requirement for TM4C129 devices.
+    USBDCDFeatureSet(0, USBLIB_FEATURE_CPUCLK, &ui32SysClock);
+    USBDCDFeatureSet(0, USBLIB_FEATURE_USBPLL, &ui32PLLRate);
+
+    // Pass our device information to the USB library and place the device
+    // on the bus.
+    USBDCDCInit(0, (tUSBDCDCDevice *)&g_sCDCDevice);
+
+    while (1)
+    {
+        if(ui32RxCount != g_RxCount)
+        {
+            ui32RxCount = g_RxCount;
+
+            if (callback != NULL)
+            {
+                callback(inBuffer.buffer,inBuffer.used);
+            }
+
+            freeArray(&inBuffer);
+            initArray(&inBuffer, 1);
+        }
+    }
+}
+
+//Send a sequence of chars to PC.
+uint32_t SendChars(char* buffer,size_t length)
+{
+    return USBBufferWrite((tUSBBuffer *)&g_sTxBuffer, (uint8_t*)buffer, length);
+}
+
+//Register for serial data receive callback.
+void RegisterReceiveCallback(void (*callback_ptr)(char* buffer, size_t length))
+{
+    callback = callback_ptr;
+}
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_adapter.h b/Software/Code_Composer/twine_usblib/usb_serial_adapter.h
new file mode 100644
index 000000000..0e630f627
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_adapter.h
@@ -0,0 +1,70 @@
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "inc/hw_ints.h"
+#include "inc/hw_memmap.h"
+#include "inc/hw_types.h"
+#include "inc/hw_uart.h"
+#include "driverlib/debug.h"
+#include "driverlib/gpio.h"
+#include "driverlib/interrupt.h"
+#include "driverlib/sysctl.h"
+#include "driverlib/systick.h"
+#include "driverlib/timer.h"
+#include "driverlib/uart.h"
+#include "driverlib/usb.h"
+#include "driverlib/rom.h"
+#include "driverlib/rom_map.h"
+#include "usblib/usblib.h"
+#include "usblib/usbcdc.h"
+#include "usblib/usb-ids.h"
+#include "usblib/device/usbdevice.h"
+#include "usblib/device/usbdcdc.h"
+//#include <ti/sysbios/knl/Task.h>
+#include "utils/ustdlib.h"
+#include "usb_serial_structs.h"
+
+//*****************************************************************************
+//
+// The system tick rate expressed both as ticks per second and a millisecond
+// period.
+//
+//*****************************************************************************
+#define TICKS_PER_SECOND        100
+
+//*****************************************************************************
+//
+// Variables tracking transmit and receive counts.
+//
+//*****************************************************************************
+static volatile uint32_t g_RxCount;
+
+#ifdef DEBUG
+uint32_t g_ui32UARTRxErrors;
+#endif
+
+//*****************************************************************************
+//
+// Flags used to pass commands from interrupt context to the main loop.
+//
+//*****************************************************************************
+#define FLAG_STATUS_UPDATE      0
+#define FLAG_USB_CONFIGURED     1
+#define FLAG_SENDING_BREAK      2
+static volatile uint32_t g_ui32Flags;
+
+static void (*callback)(char* buffer, size_t length);
+
+//*****************************************************************************
+//
+// Internal function prototypes.
+//
+//*****************************************************************************
+static void CheckForSerialStateChange(const tUSBDCDCDevice *psDevice, uint32_t ui32Errors);
+static void SetControlLineState(uint16_t ui16State);
+static void GetLineCoding(tLineCoding *psLineCoding);
+static void handleRx(void);
+void StartUSB(uint32_t ui32SysClock);
+void InitUSB(void);
+uint32_t SendChars(char* buffer,size_t length);
+void RegisterReceiveCallback(void (*callback_ptr)(char* buffer, size_t length));
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_buffer.c b/Software/Code_Composer/twine_usblib/usb_serial_buffer.c
new file mode 100644
index 000000000..5025bb772
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_buffer.c
@@ -0,0 +1,32 @@
+/*
+ * usb_serial_buffer.c
+ *
+ *  Created on: Sep 24, 2017
+ *      Author: Roy
+ */
+
+#include <stdlib.h>
+#include "usb_serial_buffer.h"
+
+void initArray(SerialBuffer *a, size_t initialSize) {
+  a->buffer = (char *)malloc(initialSize);
+  a->used = 0;
+  a->size = initialSize;
+}
+
+void insertArray(SerialBuffer *a, char element) {
+  // a->used is the number of used entries, because a->array[a->used++] updates a->used only *after* the array has been accessed.
+  // Therefore a->used can go up to a->size
+  if (a->used == a->size) {
+    a->size += 1;
+    a->buffer = (char *)realloc(a->buffer, a->size * sizeof(char));
+  }
+  a->buffer[a->used++] = element;
+}
+
+void freeArray(SerialBuffer *a) {
+  free(a->buffer);
+  a->buffer = NULL;
+  a->used = a->size = 0;
+}
+
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_buffer.h b/Software/Code_Composer/twine_usblib/usb_serial_buffer.h
new file mode 100644
index 000000000..561f84b29
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_buffer.h
@@ -0,0 +1,20 @@
+/*
+ * usb_serial_buffer.h
+ *
+ *  Created on: Sep 24, 2017
+ *      Author: Roy
+ */
+#include <stdlib.h>
+
+struct serialBuffer {
+  char *buffer;
+  size_t used;
+  size_t size;
+} typedef SerialBuffer;
+
+void initArray(SerialBuffer *a, size_t initialSize);
+
+void insertArray(SerialBuffer *a, char element);
+
+void freeArray(SerialBuffer *a);
+
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_structs.c b/Software/Code_Composer/twine_usblib/usb_serial_structs.c
new file mode 100644
index 000000000..eaf5eebf4
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_structs.c
@@ -0,0 +1,211 @@
+//*****************************************************************************
+//
+// usb_serial_structs.c - Data structures defining this CDC USB device.
+//
+// Copyright (c) 2013-2017 Texas Instruments Incorporated.  All rights reserved.
+// Software License Agreement
+// 
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+// 
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+// 
+// This is part of revision 2.1.4.178 of the DK-TM4C129X Firmware Package.
+//
+//*****************************************************************************
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "inc/hw_types.h"
+#include "driverlib/usb.h"
+#include "usblib/usblib.h"
+#include "usblib/usbcdc.h"
+#include "usblib/usb-ids.h"
+#include "usblib/device/usbdevice.h"
+#include "usblib/device/usbdcdc.h"
+#include "usb_serial_structs.h"
+
+#define USB_BUFFER_SIZE  1024
+
+//*****************************************************************************
+//
+// The languages supported by this device.
+//
+//*****************************************************************************
+const uint8_t g_pui8LangDescriptor[] =
+{
+    4,
+    USB_DTYPE_STRING,
+    USBShort(USB_LANG_EN_US)
+};
+
+//*****************************************************************************
+//
+// The manufacturer string.
+//
+//*****************************************************************************
+const uint8_t g_pui8ManufacturerString[] =
+{
+    (17 + 1) * 2,
+    USB_DTYPE_STRING,
+    'T', 0, 'e', 0, 'x', 0, 'a', 0, 's', 0, ' ', 0, 'I', 0, 'n', 0, 's', 0,
+    't', 0, 'r', 0, 'u', 0, 'm', 0, 'e', 0, 'n', 0, 't', 0, 's', 0,
+};
+
+//*****************************************************************************
+//
+// The product string.
+//
+//*****************************************************************************
+const uint8_t g_pui8ProductString[] =
+{
+    2 + (16 * 2),
+    USB_DTYPE_STRING,
+    'V', 0, 'i', 0, 'r', 0, 't', 0, 'u', 0, 'a', 0, 'l', 0, ' ', 0,
+    'C', 0, 'O', 0, 'M', 0, ' ', 0, 'P', 0, 'o', 0, 'r', 0, 't', 0
+};
+
+//*****************************************************************************
+//
+// The serial number string.
+//
+//*****************************************************************************
+const uint8_t g_pui8SerialNumberString[] =
+{
+    2 + (8 * 2),
+    USB_DTYPE_STRING,
+    '1', 0, '2', 0, '3', 0, '4', 0, '5', 0, '6', 0, '7', 0, '8', 0
+};
+
+//*****************************************************************************
+//
+// The control interface description string.
+//
+//*****************************************************************************
+const uint8_t g_pui8ControlInterfaceString[] =
+{
+    2 + (21 * 2),
+    USB_DTYPE_STRING,
+    'A', 0, 'C', 0, 'M', 0, ' ', 0, 'C', 0, 'o', 0, 'n', 0, 't', 0,
+    'r', 0, 'o', 0, 'l', 0, ' ', 0, 'I', 0, 'n', 0, 't', 0, 'e', 0,
+    'r', 0, 'f', 0, 'a', 0, 'c', 0, 'e', 0
+};
+
+//*****************************************************************************
+//
+// The configuration description string.
+//
+//*****************************************************************************
+const uint8_t g_pui8ConfigString[] =
+{
+    2 + (26 * 2),
+    USB_DTYPE_STRING,
+    'S', 0, 'e', 0, 'l', 0, 'f', 0, ' ', 0, 'P', 0, 'o', 0, 'w', 0,
+    'e', 0, 'r', 0, 'e', 0, 'd', 0, ' ', 0, 'C', 0, 'o', 0, 'n', 0,
+    'f', 0, 'i', 0, 'g', 0, 'u', 0, 'r', 0, 'a', 0, 't', 0, 'i', 0,
+    'o', 0, 'n', 0
+};
+
+//*****************************************************************************
+//
+// The descriptor string table.
+//
+//*****************************************************************************
+const uint8_t * const g_pui8StringDescriptors[] =
+{
+    g_pui8LangDescriptor,
+    g_pui8ManufacturerString,
+    g_pui8ProductString,
+    g_pui8SerialNumberString,
+    g_pui8ControlInterfaceString,
+    g_pui8ConfigString
+};
+
+#define NUM_STRING_DESCRIPTORS (sizeof(g_pui8StringDescriptors) /             \
+                                sizeof(uint8_t *))
+
+//*****************************************************************************
+//
+// CDC device callback function prototypes.
+//
+//*****************************************************************************
+uint32_t RxHandler(void *pvCBData, uint32_t ui32Event, uint32_t ui32MsgValue,
+                   void *pvMsgData);
+uint32_t TxHandler(void *pvCBData, uint32_t ui32Event, uint32_t ui32MsgValue,
+                   void *pvMsgData);
+uint32_t ControlHandler(void *pvCBData, uint32_t ui32Event,
+                        uint32_t ui32MsgValue, void *pvMsgData);
+
+//*****************************************************************************
+//
+// The CDC device initialization and customization structures. In this case,
+// we are using USBBuffers between the CDC device class driver and the
+// application code. The function pointers and callback data values are set
+// to insert a buffer in each of the data channels, transmit and receive.
+//
+// With the buffer in place, the CDC channel callback is set to the relevant
+// channel function and the callback data is set to point to the channel
+// instance data. The buffer, in turn, has its callback set to the application
+// function and the callback data set to our CDC instance structure.
+//
+//*****************************************************************************
+tCDCSerInstance g_sCDCInstance;
+tUSBDCDCDevice g_sCDCDevice =
+{
+    USB_VID_TI_1CBE,
+    USB_PID_SERIAL,
+    0,
+    USB_CONF_ATTR_SELF_PWR,
+    ControlHandler,
+    (void *)&g_sCDCDevice,
+    USBBufferEventCallback,
+    (void *)&g_sRxBuffer,
+    USBBufferEventCallback,
+    (void *)&g_sTxBuffer,
+    g_pui8StringDescriptors,
+    NUM_STRING_DESCRIPTORS,
+};
+
+//*****************************************************************************
+//
+// Receive buffer (from the USB perspective).
+//
+//*****************************************************************************
+uint8_t g_pui8USBRxBuffer[USB_BUFFER_SIZE];
+tUSBBuffer g_sRxBuffer =
+{
+    false,                          // This is a receive buffer.
+    RxHandler,                      // pfnCallback
+    (void *)&g_sCDCDevice,          // Callback data is our device pointer.
+    USBDCDCPacketRead,              // pfnTransfer
+    USBDCDCRxPacketAvailable,       // pfnAvailable
+    (void *)&g_sCDCDevice,          // pvHandle
+    g_pui8USBRxBuffer,              // pui8Buffer
+    USB_BUFFER_SIZE,               // ui32BufferSize
+};
+
+//*****************************************************************************
+//
+// Transmit buffer (from the USB perspective).
+//
+//*****************************************************************************
+uint8_t g_pui8USBTxBuffer[USB_BUFFER_SIZE];
+tUSBBuffer g_sTxBuffer =
+{
+    true,                           // This is a transmit buffer.
+    TxHandler,                      // pfnCallback
+    (void *)&g_sCDCDevice,          // Callback data is our device pointer.
+    USBDCDCPacketWrite,             // pfnTransfer
+    USBDCDCTxPacketAvailable,       // pfnAvailable
+    (void *)&g_sCDCDevice,          // pvHandle
+    g_pui8USBTxBuffer,              // pcBuffer
+    USB_BUFFER_SIZE,               // ulBufferSize
+};
diff --git a/Software/Code_Composer/twine_usblib/usb_serial_structs.h b/Software/Code_Composer/twine_usblib/usb_serial_structs.h
new file mode 100644
index 000000000..a02ac1c75
--- /dev/null
+++ b/Software/Code_Composer/twine_usblib/usb_serial_structs.h
@@ -0,0 +1,49 @@
+//*****************************************************************************
+//
+// usb_serial_structs.h - Data structures defining this USB CDC device.
+//
+// Copyright (c) 2013-2017 Texas Instruments Incorporated.  All rights reserved.
+// Software License Agreement
+// 
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+// 
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+// 
+// This is part of revision 2.1.4.178 of the DK-TM4C129X Firmware Package.
+//
+//*****************************************************************************
+
+#ifndef _USB_SERIAL_STRUCTS_H_
+#define _USB_SERIAL_STRUCTS_H_
+
+//*****************************************************************************
+//
+// The size of the transmit and receive buffers used for the redirected UART.
+// This number should be a power of 2 for best performance.  256 is chosen
+// pretty much at random though the buffer should be at least twice the size of
+// a maximum-sized USB packet.
+//
+//*****************************************************************************
+#define UART_BUFFER_SIZE 256
+
+extern uint32_t RxHandler(void *pvCBData, uint32_t ui32Event,
+                          uint32_t ui32MsgValue, void *pvMsgData);
+extern uint32_t TxHandler(void *pvlCBData, uint32_t ui32Event,
+                          uint32_t ui32MsgValue, void *pvMsgData);
+
+extern tUSBBuffer g_sTxBuffer;
+extern tUSBBuffer g_sRxBuffer;
+extern tUSBDCDCDevice g_sCDCDevice;
+extern uint8_t g_pui8USBTxBuffer[];
+extern uint8_t g_pui8USBRxBuffer[];
+
+#endif