Revision 71:9cf0c68ac380, committed 2020-08-14

Comitter:

gabriel_delgado

Date:

Fri Aug 14 12:33:17 2020 +0000

Parent:

70:ff3afeaa31be

Commit message:

MTi-3 UART and FRDM-KL25Z

Changed in this revision

--- a/main.cpp	Thu May 03 10:35:39 2018 +0200
+++ b/main.cpp	Fri Aug 14 12:33:17 2020 +0000
@@ -1,79 +1,3 @@
-/*!
- * \file
- * \copyright Copyright (C) Xsens Technologies B.V., 2015.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy
- * of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- * \page Overview Firmware overview
- *
- * Example firmware for communicating with an Xsens MTi-1 series motion
- * tracker (MT).
- *
- * The firmware uses the mbed-rtos library to provide RTOS features such as
- * memory pools and queues. A single thread (main) is used with reception of
- * data from the motion tracker.
- *
- * \section Hardware setup
- * The firmware has been tested with a ST Nucleo F302R8 development board.
- * The Nucleo board should be connected to the MTi1 development board using the
- * Arduino compatible headers on the Nucleo board as follows:
- *
- * | Nucleo pin | MTi1 func.  | MTi1 dev. pin | Used for PSEL |
- * |------------|-------------|---------------|---------------|
- * | 5V         | VDD         | P300-1        | Any           |
- * | IORef      | VDDIO       | P300-2        | Any           |
- * | GND        | GND         | P300-3        | Any           |
- * | D2         | nRST        | P300-5        | Any           |
- * | SCL/D15    | UART_TX/SCL | P300-9        | UART / I2C    |
- * | SDA/D14    | UART_RX/SDA | P300-11       | UART / I2C    |
- * | D3         | DRDY        | P300-15       | SPI / I2C     |
- * | SCK/D13    | SCK/ADD0    | P300-17       | SPI / I2C     |
- * | MISO/D12   | MISO/ADD1   | P300-19       | SPI / I2C     |
- * | MOSI/D11   | MOSI/ADD2   | P300-21       | SPI / I2C     |
- * | CS/D10     | nCS         | P300-23       | SPI           |
- *
- * Communication with the host PC is achieved using the built-in USB serial
- * bridge of the Nucleo board. Communication with the MT is achieved through
- * either the UART, I2C or SPI interface. The active interface is chosen
- * on the MT's side by use of the PSEL0 and PSEL1 switch on the MTi1
- * development board. This example needs to be built with the matching
- * MTI_USES_xxxx_INTERFACE define set (see below)
- *
- * \subsection Porting
- * To port to a different mbed platform the following pin definitions need
- * to be updated.
- * In all cases: the reset line pin
- * For UART: the serial Rx/Tx lines UART_TX and UART_RX
- * For I2C: the SCL,SDA,DRDY and address lines
- * For SPI: The SCK,MISO,MOSI,nCS and DRDY lines
- *
- * \section Firmware Operation
- * The firmware starts by initializing the serial ports used to communicate
- * with the host PC and with the MT. During the initialization the MT is held
- * in reset using the nRST input.
- *
- * Once the firmware is ready to communicate with the MT the reset line is
- * released and the firmware waits for a wakeup message from the MT. If this is
- * not received within 1 second the firmware will try to restore communication
- * with the MT using a special restore communication procedure.
- *
- * When the MT is ready for communication the firmware requests the device ID
- * of the MT, and based on this determines which type of MTi is connected.
- * If the MT is an MTi-1 then it will be configured to send inertial and
- * magnetic measurement data. MTi-2 and MTi-3 devices have onboard orientation
- * estimation and will therefore be configured to provide quaternion output.
- */
-
 #include "mbed.h"
 #include "rtos.h"
 #include "xbusparser.h"
@@ -82,83 +6,19 @@
 #include "xbusdef.h"
 
 // Select communication interface to use for MTi
-#define MTI_USES_I2C_INTERFACE
+#define MTI_USES_UART_INTERFACE
 
 #if !(defined(MTI_USES_I2C_INTERFACE) || defined(MTI_USES_SPI_INTERFACE) || defined(MTI_USES_UART_INTERFACE))
 #error "Must select communication interface by defining one of: MTI_USES_I2C_INTERFACE, MTI_USES_SPI_INTERFACE or MTI_USES_UART_INTERFACE"
 #endif
 
-#if defined(TARGET_NUCLEO_F302R8)
-
-#define PC_TX 		PA_2
-#define PC_RX 		PA_3
-#define MT_TX 		PB_9
-#define MT_RX 		PB_8
-#define MT_SDA 		PB_9
-#define MT_SCL 		PB_8
-#define MT_ADD0 	PB_13
-#define MT_ADD1 	PB_14
-#define MT_ADD2 	PB_15
-#define MT_MOSI 	PB_15
-#define MT_MISO 	PB_14
-#define MT_SCLK 	PB_13
-#define MT_nCS 		PB_6
-#define MT_NRESET 	PA_10
-#define MT_DRDY 	PB_3
-
-#elif defined(TARGET_NUCLEO_F401RE)
-
-#define PC_TX		PA_2
-#define PC_RX		PA_3
-#define MT_TX 		PA_10
-#define MT_RX   	PA_9
-#define MT_SDA		PB_9
-#define MT_SCL		PB_8
-#define MT_ADD0		PB_13
-#define MT_ADD1		PB_14
-#define MT_ADD2		PB_15
-#define MT_MOSI		PB_15
-#define MT_MISO		PB_14
-#define MT_SCLK		PB_13
-#define MT_nCS		PB_6
-#define MT_NRESET	PC_9
-#define MT_DRDY		PB_3
-
-#elif defined(TARGET_KL46Z)
+#if defined(TARGET_KL25Z)
 
 #define PC_TX 		USBTX
 #define PC_RX 		USBRX
 #define MT_TX 		PTE0
 #define MT_RX 		PTE1
-#define MT_SDA 		PTE0
-#define MT_SCL 		PTE1
-#define MT_ADD0 	PTD5
-#define MT_ADD1 	PTD7
-#define MT_ADD2 	PTD6
-#define MT_MOSI 	PTD6
-#define MT_MISO 	PTD7
-#define MT_SCLK 	PTD5
-#define MT_nCS 		PTD4
-#define MT_NRESET 	PTD3
-#define MT_DRDY 	PTD2
 
-#elif defined(TARGET_LPC4088)
-
-#define PC_TX 		USBTX
-#define PC_RX 		USBRX
-#define MT_TX 		p9
-#define MT_RX 		p10
-#define MT_SDA 		p9
-#define MT_SCL 		p10
-#define MT_ADD0 	p13
-#define MT_ADD1 	p12
-#define MT_ADD2 	p11
-#define MT_MOSI 	p11
-#define MT_MISO 	p12
-#define MT_SCLK 	p13
-#define MT_nCS 		p14
-#define MT_NRESET 	p8
-#define MT_DRDY 	p15
 
 #else
 
@@ -166,268 +26,47 @@
 
 #endif
 
+#define PC_UART_BAUDRATE (115200)
 
-/*!
- * \brief Baudrate used to communicate with host PC.
- */
-#define PC_UART_BAUDRATE (921600)
-
-/*!
- * \brief The number of items to hold in the memory pools.
- */
 #define MEMORY_POOL_SIZE (4)
-/*!
- * \brief The size of the queue used for device responses.
- * This is set to one as in typical Xbus operation each command receives a
- * response before the next command is sent.
- */
+
 #define RESPONSE_QUEUE_SIZE (1)
-/*!
- * \brief The size of the queue used for data messages.
- * This is set to two to allow some overlap between printing received data to
- * the PC serial port and the reception of the subsequent data packet. In
- * more complex applications it might be necessary to increase this if
- * message processing might occasionally require more time than normal.
- */
+
 #define DATA_QUEUE_SIZE (2)
-/*!
- * \brief The maximum size of an xbus message supported by the application.
- * This is the size of the message buffers in the message data memory pool.
- */
+
 #define MAX_XBUS_DATA_SIZE (128)
 
-/*! \brief Serial port for communication with the host PC. */
 static Serial pc(PC_TX, PC_RX);
 
-#if defined(MTI_USES_I2C_INTERFACE)
-/*!
- * \brief I2C master used for communication with the MT.
- */
-static I2C mt(MT_SDA, MT_SCL);
-static DigitalOut add0(MT_ADD0);
-static DigitalOut add1(MT_ADD1);
-static DigitalOut add2(MT_ADD2);
 
-#elif defined(MTI_USES_SPI_INTERFACE)
-/*! \brief SPI master used for communication with the MT. */
-static SPI mt(MT_MOSI, MT_MISO, MT_SCLK);
-
-/*! \brief Chip select line for the MT. */
-static DigitalOut cs(MT_nCS, 1);
-
-#elif defined(MTI_USES_UART_INTERFACE)
-/*!
- * \brief Serial port for communication with the MT.
- *
- * We use a RawSerial port as the Stream inteface used by the regular
- * Serial class can have problems with the RTOS when using interrupts.
- */
+#if defined(MTI_USES_UART_INTERFACE)
 static RawSerial mt(MT_TX, MT_RX);
 #endif
 
-#if defined(MTI_USES_I2C_INTERFACE) || defined(MTI_USES_SPI_INTERFACE)
-/*!
- * \brief Interrput line used by MT to signal that data is available.
- */
-static InterruptIn drdy(MT_DRDY);
-#endif
 
-/*!
- * \brief MT reset line.
- *
- * MT is held in reset on startup.
- */
-static DigitalOut mtReset(MT_NRESET, 0);
-/*! \brief XbusParser used to parse incoming Xbus messages from the MT. */
 static XbusParser* xbusParser;
 
-/*!
- * \brief Memory pool used for storing Xbus messages when passing them
- * to the main thread.
- */
 MemoryPool<XbusMessage, MEMORY_POOL_SIZE> g_messagePool;
-/*!
- * \brief Memory pool used for storing the payload of Xbus messages.
- */
+
 MemoryPool<uint8_t[MAX_XBUS_DATA_SIZE], MEMORY_POOL_SIZE> g_messageDataPool;
-/*!
- * \brief Queue used to pass data messages to the main thread for processing.
- */
+
 Queue<XbusMessage, DATA_QUEUE_SIZE> g_dataQueue;
-/*!
- * \brief Queue used for passing all other messages to the main thread for processing.
- */
+
 Queue<XbusMessage, RESPONSE_QUEUE_SIZE> g_responseQueue;
 
-/*!
- * \brief Allocate message data buffer from the message data pool.
- */
 static void* allocateMessageData(size_t bufSize)
 {
 	return bufSize < MAX_XBUS_DATA_SIZE ? g_messageDataPool.alloc() : NULL;
 }
 
-/*!
- * \brief Deallocate message data previously allocated from the message
- * data pool.
- */
 static void deallocateMessageData(void const* buffer)
 {
 	g_messageDataPool.free((uint8_t(*)[MAX_XBUS_DATA_SIZE])buffer);
 }
 
-#if defined(MTI_USES_I2C_INTERFACE)
-#define MTI_I2C_ADDRESS (0x1D << 1)
-static void readData(uint8_t pipe, uint16_t dataLength)
-{
-	const int preambleLength = 2;
-	uint8_t* buf = (uint8_t*)allocateMessageData(dataLength+preambleLength);
-	if (buf)
-	{
-		buf[0] = XBUS_PREAMBLE;
-		buf[1] = XBUS_MASTERDEVICE;
-		mt.write(MTI_I2C_ADDRESS, (char*)&pipe, sizeof(pipe), true);
-		mt.read(MTI_I2C_ADDRESS, (char*)buf+preambleLength, dataLength);
-		XbusParser_parseBuffer(xbusParser, buf, dataLength+preambleLength);
-		deallocateMessageData(buf);
-	}
-}
-static void mtInterruptHandler(void)
-{
-	while (true)
-	{
-		uint8_t opcode = XBUS_PIPE_STATUS;
-		uint8_t status[4];
-		mt.write(MTI_I2C_ADDRESS, (char*)&opcode, sizeof(opcode), true);
-		mt.read(MTI_I2C_ADDRESS, (char*)status, sizeof(status));
-
-		uint16_t notificationSize = status[0] | (status[1] << 8);
-		uint16_t measurementSize = status[2] | (status[3] << 8);
-
-		if (notificationSize)
-		{
-			readData(XBUS_NOTIFICATION_PIPE, notificationSize);
-		}
-		else if (measurementSize)
-		{
-			readData(XBUS_MEASUREMENT_PIPE, measurementSize);
-		}
-		else
-			break; // No more data available to read.
-	}
-}
-
-static void configureMtCommunicationInterface(void)
-{
-	mt.frequency(400000);
-	//Use the addX pins to configure I2C address 0x1D
-	add0.write(0);
-	add1.write(0);
-	add2.write(0);
-	drdy.rise(&mtInterruptHandler);
-}
-
-/*!
- * \brief Send a message to the MT
- *
- * This function formats the message data and writes this to the MT I2C
- * interface. It does not wait for any response.
- */
-static void sendMessage(XbusMessage const* m)
-{
-	uint8_t buf[64];
-	size_t rawLength = XbusMessage_format(buf, m, XLLF_I2c);
-	mt.write(MTI_I2C_ADDRESS, (char*)buf, rawLength);
-}
-#elif defined(MTI_USES_SPI_INTERFACE)
-static void sendOpcode(uint8_t opcode)
-{
-	mt.write(opcode);
-	for (int filler = 0; filler < 3; ++filler)
-	{
-		mt.write(filler);
-	}
-}
 
-static void readData(uint8_t pipe, uint16_t dataLength)
-{
-	const int preambleLength = 2;
-	uint8_t* buf = (uint8_t*)allocateMessageData(dataLength+preambleLength);
-	if (buf)
-	{
-		uint8_t* dptr = buf;
-		*dptr++ = XBUS_PREAMBLE;
-		*dptr++ = XBUS_MASTERDEVICE;
-		cs = 0;
-		sendOpcode(pipe);
-		for (int i = 0; i < dataLength; ++i)
-		{
-			*dptr++ = mt.write(0);
-		}
-		cs = 1;
-		XbusParser_parseBuffer(xbusParser, buf, dptr - buf);
-		deallocateMessageData(buf);
-	}
-}
-static void mtInterruptHandler(void)
-{
-	while (true)
-	{
-		cs = 0;
-		sendOpcode(XBUS_PIPE_STATUS);
-		uint8_t status[4];
-		for (int i = 0; i < sizeof(status); ++i)
-		{
-			status[i] = mt.write(0);
-		}
-		cs = 1;
-
-		uint16_t notificationSize = status[0] | (status[1] << 8);
-		uint16_t measurementSize = status[2] | (status[3] <<8);
+#if defined(MTI_USES_UART_INTERFACE)
 
-		if (notificationSize)
-		{
-			readData(XBUS_NOTIFICATION_PIPE, notificationSize);
-		}
-		else if (measurementSize)
-		{
-			readData(XBUS_MEASUREMENT_PIPE, measurementSize);
-		}
-		else
-			break; // No more data available to read.
-	}
-}
-
-static void configureMtCommunicationInterface(void)
-{
-	mt.frequency(1000000);
-	mt.format(8, 3);
-	drdy.rise(&mtInterruptHandler);
-}
-
-/*!
- * \brief Send a message to the MT
- *
- * This function formats the message data and writes this to the MT SPI
- * interface. It does not wait for any response.
- */
-static void sendMessage(XbusMessage const* m)
-{
-	uint8_t buf[64];
-	size_t rawLength = XbusMessage_format(buf, m, XLLF_Spi);
-	cs = 0;
-	for (int i = 0; i < rawLength; ++i)
-	{
-		mt.write(buf[i]);
-	}
-	cs = 1;
-}
-#elif defined(MTI_USES_UART_INTERFACE)
-/*!
- * \brief RX Interrupt handler for the MT serial port.
- *
- * Passes received data to an XbusParser to extract messages.
- */
 static void mtLowLevelHandler(void)
 {
 	while (mt.readable())
@@ -436,10 +75,8 @@
 	}
 }
 
-/*!
- * \brief Configure the serial port used for communication with the
- * motion tracker.
- */
+
+
 static void configureMtCommunicationInterface(void)
 {
 	mt.baud(115200);
@@ -447,46 +84,9 @@
 	mt.attach(mtLowLevelHandler, Serial::RxIrq);
 }
 
-/*!
- * \brief Send a message to the MT
- *
- * This function formats the message data and writes this to the MT serial
- * port. It does not wait for any response.
- */
-static void sendMessage(XbusMessage const* m)
-{
-	uint8_t buf[64];
-	size_t rawLength = XbusMessage_format(buf, m, XLLF_Uart);
-	for (size_t i = 0; i < rawLength; ++i)
-	{
-		mt.putc(buf[i]);
-	}
-}
 #endif
 
 
-/*!
- * \brief Send a message to the MT and wait for a response.
- * \returns Response message from the MT, or NULL is no response received
- * within 500ms.
- *
- * Blocking behaviour is implemented by waiting for a response to be written
- * to the response queue by the XbusParser.
- */
-static XbusMessage const* doTransaction(XbusMessage const* m)
-{
-	sendMessage(m);
-
-	osEvent ev = g_responseQueue.get(500);
-	return ev.status == osEventMessage ? (XbusMessage*)ev.value.p : NULL;
-}
-
-/*!
- * \brief RAII object to manage message memory deallocation.
- *
- * Will automatically free the memory used by an XbusMessage when going out
- * of scope.
- */
 class XbusMessageMemoryManager
 {
 	public:
@@ -509,79 +109,8 @@
 		XbusMessage const* m_message;
 };
 
-/*!
- * \brief Dump information from a message to the PC serial port.
- */
-static void dumpResponse(XbusMessage const* response)
-{
-	switch (response->mid)
-	{
-		case XMID_GotoConfigAck:
-			pc.printf("Device went to config mode.\r\n");
-			break;
-
-		case XMID_Error:
-			pc.printf("Device error!");
-			break;
-
-		default:
-			pc.printf("Received response MID=%X, length=%d\r\n", response->mid, response->length);
-			break;
-	}
-}
-
-/*!
- * \brief Send a command to the MT and wait for a response.
- * \param cmdId The XsMessageId of the command to send.
- *
- * Commands are simple messages without and payload data.
- */
-static void sendCommand(XsMessageId cmdId)
-{
-	XbusMessage m = {cmdId};
-	XbusMessage const* response = doTransaction(&m);
-	XbusMessageMemoryManager janitor(response);
 
-	if (response)
-	{
-		dumpResponse(response);
-	}
-	else
-	{
-		pc.printf("Timeout waiting for response.\r\n");
-	}
-}
 
-/*!
- * \brief Handle a command from the PC
- *
- * The example application supports single character commands from the host
- * PC to switch between configuration and measurement modes.
- */
-static void handlePcCommand(char cmd)
-{
-	switch (cmd)
-	{
-		case 'c':
-			sendCommand(XMID_GotoConfig);
-			break;
-
-		case 'm':
-			sendCommand(XMID_GotoMeasurement);
-			break;
-	}
-}
-
-/*!
- * \brief XbusParser callback function to handle received messages.
- * \param message Pointer to the last received message.
- *
- * In this example received messages are copied into one of two message
- * queues for later handling by the main thread. Data messages are put
- * in one queue, while all other responses are placed in the second queue.
- * This is done so that data and other messages can be handled separately
- * by the application code.
- */
 static void mtMessageHandler(struct XbusMessage const* message)
 {
 	XbusMessage* m = g_messagePool.alloc();
@@ -603,268 +132,24 @@
 	}
 }
 
-/*!
- * \brief Configure the serial port used to communicate with the host PC.
- */
+
 static void configurePcInterface(void)
 {
 	pc.baud(PC_UART_BAUDRATE);
 	pc.format(8, Serial::None, 1);
 }
 
-/*!
- * \brief Read the device ID of the motion tracker.
- */
-static uint32_t readDeviceId(void)
-{
-	XbusMessage reqDid = {XMID_ReqDid};
-	XbusMessage const* didRsp = doTransaction(&reqDid);
-	XbusMessageMemoryManager janitor(didRsp);
-	uint32_t deviceId = 0;
-	if (didRsp)
-	{
-		if (didRsp->mid == XMID_DeviceId)
-		{
-			deviceId = *(uint32_t*)didRsp->data;
-		}
-	}
-	return deviceId;
-}
-
-/*!
- * \brief Sets MT output configuration.
- * \param conf Pointer to an array of OutputConfiguration elements.
- * \param elements The number of elements in the configuration array.
- *
- * The response from the device indicates the actual values that will
- * be used by the motion tracker. These may differ from the requested
- * parameters as the motion tracker validates the requested parameters
- * before applying them.
- */
-static bool setOutputConfiguration(OutputConfiguration const* conf, uint8_t elements)
-{
-	XbusMessage outputConfMsg = {XMID_SetOutputConfig, elements, (void*)conf};
-	XbusMessage const* outputConfRsp = doTransaction(&outputConfMsg);
-	XbusMessageMemoryManager janitor(outputConfRsp);
-	if (outputConfRsp)
-	{
-		if (outputConfRsp->mid == XMID_OutputConfig)
-		{
-			pc.printf("Output configuration set to:\r\n");
-			OutputConfiguration* conf = (OutputConfiguration*)outputConfRsp->data;
-			for (int i = 0; i < outputConfRsp->length; ++i)
-			{
-				pc.printf("\t%s: %d Hz\r\n", XbusMessage_dataDescription(conf->dtype), conf->freq);
-				++conf;
-			}
-			return true;
-		}
-		else
-		{
-			dumpResponse(outputConfRsp);
-		}
-	}
-	else
-	{
-		pc.printf("Failed to set output configuration.\r\n");
-	}
-	return false;
-}
-
-/*!
- * \brief Sets the motion tracker output configuration based on the function
- * of the attached device.
- *
- * The output configuration depends on the type of MTi-1 device connected.
- * An MTI-1 (IMU) device does not have an onboard orientation filter so
- * cannot output quaternion data, only inertial and magnetic measurement
- * data.
- * MTi-2 and MTi-3 devices have an onboard filter so can send quaternions.
- */
-static bool configureMotionTracker(void)
-{
-	uint32_t deviceId = readDeviceId();
-
-	if (deviceId)
-	{
-		pc.printf("Found device with ID: %08X.\r\n", deviceId);
-		if (!XsDeviceId_isMtMk4_X(deviceId))
-		{
-			pc.printf("Device is not an MTi-1 series.\r\n");
-			return false;
-		}
-
-		DeviceFunction function = XsDeviceId_getFunction(deviceId);
-		pc.printf("Device is an MTi-%d: %s.\r\n", function, XsDeviceId_functionDescription(function));
 
-		if (function == DF_IMU)
-		{
-			OutputConfiguration conf[] = {
-				{XDI_PacketCounter, 65535},
-				{XDI_SampleTimeFine, 65535},
-				{XDI_Acceleration, 100},
-				{XDI_RateOfTurn, 100},
-				{XDI_MagneticField, 100}
-			};
-			return setOutputConfiguration(conf,
-					sizeof(conf) / sizeof(OutputConfiguration));
-		}
-		else
-		{
-			OutputConfiguration conf[] = {
-				{XDI_PacketCounter, 65535},
-				{XDI_SampleTimeFine, 65535},
-				{XDI_Quaternion, 100},
-				{XDI_StatusWord, 65535}
-			};
-			return setOutputConfiguration(conf,
-					sizeof(conf) / sizeof(OutputConfiguration));
-		}
-	}
 
-	return false;
-}
-
-/*!
- * \brief Wait for a wakeup message from the MTi.
- * \param timeout Time to wait to receive the wakeup message.
- * \return true if wakeup received within timeout, else false.
- *
- * The MTi sends an XMID_Wakeup message once it has completed its bootup
- * procedure. If this is acknowledged by an XMID_WakeupAck message then the MTi
- * will stay in configuration mode. Otherwise it will automatically enter
- * measurement mode with the stored output configuration.
- */
-bool waitForWakeup(uint32_t timeout)
-{
-	osEvent ev = g_responseQueue.get(timeout);
-	if (ev.status == osEventMessage)
-	{
-		XbusMessage const* m = (XbusMessage const*)ev.value.p;
-		XbusMessageMemoryManager janitor(m);
-		return m->mid == XMID_Wakeup;
-	}
-	return false;
-}
-
-/*!
- * \brief Send wakeup acknowledge message to MTi.
- *
- * Sending a wakeup acknowledge will cause the device to stay in configuration
- * mode instead of automatically transitioning to measurement mode with the
- * stored output configuration.
- */
-void sendWakeupAck(void)
-{
-	XbusMessage ack = {XMID_WakeupAck};
-	sendMessage(&ack);
-	pc.printf("Device ready for operation.\r\n");
-}
-
-#ifdef MTI_USES_UART_INTERFACE
-/*!
- * \brief Restore communication with the MTi.
- *
- * On bootup the MTi will listen for a magic byte to signal that it should
- * return to default baudrate and output configuration. This can be used to
- * recover from a bad or unknown configuration.
- */
-void restoreCommunication(void)
-{
-	pc.printf("Restoring communication with device... ");
-	mtReset = 0;
-	Thread::wait(1);
-	mtReset = 1;
-
-	do
-	{
-		mt.putc(0xDE);
-	}
-	while (!waitForWakeup(1));
-	pc.printf("done\r\n");
-
-	sendWakeupAck();
-}
-#endif
-
-/*!
- * \brief Releases the MTi reset line and waits for a wakeup message.
- *
- * If no wakeup message is received within 1 second the restore communications
- * procedure is done to reset the MTi to default baudrate and output configuration.
- */
-static bool wakeupMotionTracker(void)
-{
-	mtReset.write(1); // Release MT from reset.
-	if (waitForWakeup(1000))
-	{
-		sendWakeupAck();
-	}
-	else
-	{
-#ifdef MTI_USES_UART_INTERFACE
-		restoreCommunication();
-#else
-		pc.printf("Failed to communicate with MTi device\r\n");
-		return true;
-#endif
-	}
-	return true;
-}
-
-static void printIntroMessage(void)
-{
-	pc.printf("\r\n\r\n\r\n\r\n\r\n");
-	pc.printf("MTi-1 series embedded example firmware.\r\n");
-}
-
-/*!	\brief Prints usage instructions
-*/
-static void printUsageInstructions(void)
-{
-	pc.printf("\r\n");
-	pc.printf("Press 'm' to start measuring and 'c' to return to config mode.\r\n");
-}
-
-/*!
- * \brief Output the contents of a data message to the PC serial port.
- */
 static void printMessageData(struct XbusMessage const* message)
 {
 	if (!message)
 		return;
 
-	pc.printf("MTData2:");
-	uint16_t counter;
-	if (XbusMessage_getDataItem(&counter, XDI_PacketCounter, message))
-	{
-		pc.printf(" Packet counter: %5d", counter);
-	}
 	float ori[4];
 	if (XbusMessage_getDataItem(ori, XDI_Quaternion, message))
 	{
-		pc.printf(" Orientation: (% .3f, % .3f, % .3f, % .3f)", ori[0], ori[1],
-				ori[2], ori[3]);
-	}
-	float acc[3];
-	if (XbusMessage_getDataItem(acc, XDI_Acceleration, message))
-	{
-		pc.printf(" Acceleration: (% .3f, % .3f, % .3f)", acc[0], acc[1], acc[2]);
-	}
-	float gyr[3];
-	if (XbusMessage_getDataItem(gyr, XDI_RateOfTurn, message))
-	{
-		pc.printf(" Rate Of Turn: (% .3f, % .3f, % .3f)", gyr[0], gyr[1], gyr[2]);
-	}
-	float mag[3];
-	if (XbusMessage_getDataItem(mag, XDI_MagneticField, message))
-	{
-		pc.printf(" Magnetic Field: (% .3f, % .3f, % .3f)", mag[0], mag[1], mag[2]);
-	}
-	uint32_t status;
-	if (XbusMessage_getDataItem(&status, XDI_StatusWord, message))
-	{
-		pc.printf(" Status:%X", status);
+		pc.printf("% .3f, % .3f, % .3f, % .3f", ori[0], ori[1], ori[2], ori[3]);
 	}
 	pc.printf("\r\n");
 }
@@ -879,20 +164,9 @@
 	xbusParser = XbusParser_create(&xbusCallback);
 	configurePcInterface();
 	configureMtCommunicationInterface();
-		
-	printIntroMessage();
-	if (wakeupMotionTracker())
-	{
-		if (configureMotionTracker())
-		{
-			printUsageInstructions();
+
 			for (;;)
 			{
-				while (pc.readable())
-				{
-					handlePcCommand(pc.getc());
-				}
-
 				osEvent ev = g_dataQueue.get(10);
 				if (ev.status == osEventMessage)
 				{
@@ -901,11 +175,5 @@
 					printMessageData(data);
 				}
 			}
-		}
-		else
-		{
-			pc.printf("Failed to configure motion tracker.\r\n");
-			return -1;
-		}
-	}
+
 }