Renesas Electronics America Inc. © 2012 Renesas Electronics America Inc. All rights reserved. Sensors Fundamentals © 2012 Renesas Electronics America Inc. All rights reserved.2 Renesas Technology & Solution Portfolio © 2012 Renesas Electronics America Inc. All rights reserved.3 Introduction Sensors fundamentals ADI sensors Sensors data acquisition ADI support for sensors applications Hands on lab Summary Agenda © 2012 Renesas Electronics America Inc. All rights reserved.4 Introduction The Sensor Fundamentals lab provides an introduction to some of the ADI sensors and to the evaluation boards for these sensors compatible with Renesas MCU platforms We will show the process of exchanging data with ADI digital sensors We will show the steps required to read data from ADI analog sensors using the A/D converter incorporated in a Renesas MCU © 2012 Renesas Electronics America Inc. All rights reserved.5 Sensors Fundamentals © 2012 Renesas Electronics America Inc. All rights reserved.6 What is a Sensor? A sensor is a device that receives a signal or a stimulus and responds with an electrical signal Sensors are used to measure various physical properties: Temperature Tilt, inertial forces, shock and vibration - accelerometers Angular rate (how quickly an object turns) - gyroscopes Sound intensity - microphones © 2012 Renesas Electronics America Inc. All rights reserved.7 Sensors Classification Sensors can be classified according to the physical property the sensor is designed to measure From a signal-conditioning viewpoint, sensors can be classified as: Active sensors – require an external source of excitation. Passive sensors – generate their own electric output signal without requiring external voltages or currents From the output electrical signal viewpoint, sensors can be grouped in two categories: Analog sensors – produce analog output Digital sensors – provide digital output © 2012 Renesas Electronics America Inc. All rights reserved.8 ADI Sensors © 2012 Renesas Electronics America Inc. All rights reserved.9 Analog Devices Sensors Product Range Analog Devices sensor portfolio focuses on: Motion Temperature Sound ADI offers the broadest MEMS (MicroElectroMechanical Systems) inertial sensor portfolios in the industry, including: High performance low-g accelerometers High-g accelerometers Gyroscopes Fully integrated Inertial Measurement Units (IMUs) High performance MEMS microphones © 2012 Renesas Electronics America Inc. All rights reserved.10 ADI Sensors Evaluation ADI offers for most of its products at least one type of evaluation board. Some boards can be connected directly to PCs using USB or Serial ports, others to FPGA or MCU development boards using special connectors The ADI evaluation boards compatible and directly connectable to the Renesas MCU platforms are the Pmods Connections between a Renesas MCU other ADI evaluation boards can be made using wires [...]... America Inc All rights reserved Digital or Analog? Digital Sensors Can be connected directly to MCU Many sensors can be connected to the same bus More expensive than analog sensors Bigger than analog sensors Are built to meet the requirements of most customers 23 © 2012 Renesas Electronics America Inc All rights reserved Analog Sensors Usually, the analog signal has to be conditioned to... serial interface Sensors Data Acquisition 17 © 2012 Renesas Electronics America Inc All rights reserved Sensors Interfacing With MCUs When a sensor has to be interfaced with a microcontroller, the classification from the output electrical signal viewpoint is important Usually, digital sensors can be connected directly to a microcontroller through the integrated data peripherals Many sensors can be... the analog signal has to be conditioned to meet the input requirements of the ADC Each sensor needs an ADC Cheaper than digital sensors Smaller than digital sensors ADC can be chosen to satisfy your specific sample rate and resolution requirements ADI Support for Sensors Applications 24 © 2012 Renesas Electronics America Inc All rights reserved EZ.Analog.com EngineerZone (ez.analog.com) is... where possible 29 © 2012 Renesas Electronics America Inc All rights reserved Summary The lab provided an introduction to some of the ADI sensors and to the evaluation boards for these sensors compatible with Renesas MCU platforms The ADI support websites for sensors applications were presented: wiki.analog.com - reference projects documentation and source code ez.analog.com - technical support... steps required to create a new project for the selected Renesas MCU, establish communication through SPI and I2C with different ADI digital sensors, read data from an ADI analog sensor through the A/D converter found on the Renesas MCU The data read from the ADI sensors is displayed on the LCD found on the Renesas RDK thus providing direct feedback without the need of additional hardware resources... (wiki.analog.com) is a collaborative space allowing the sharing of knowledge and content between ADI engineers and the design engineering community 26 © 2012 Renesas Electronics America Inc All rights reserved Sensors Drivers The drivers for a wide list of ADI products can be downloaded from the Wiki page The drivers may be used without modifications, with any microcontroller, but the specific communication... Electronics America Inc All rights reserved PmodRS232 – Serial converter & interface Analog Devices ADM3232E Translates voltage from the logic levels used by system boards to the RS232 voltage ADI Pmods – Sensors PmodACL – 3-axis accelerometer Analog Devices ADP5589 PmodACL2 – 3-axis MEMS accelerometer Analog Devices ADXL362 Low power, 3-axis accelerometer with high resolution (13-bit) Measurement at up... peripheral If an analog sensor has to be interfaced, the analog sensor data has to be digitized This process can be done with an A/D converter 18 © 2012 Renesas Electronics America Inc All rights reserved Sensors Interfacing With MCUs 19 © 2012 Renesas Electronics America Inc All rights reserved I2C Communication ADT7420 – Reading back data from the ID register 20 © 2012 Renesas Electronics America Inc... documentation and source code ez.analog.com - technical support forum During the lab the attendees learnt how to create a new project for a Renesas MCU and how to exchange data with ADI digital and analog sensors 30 © 2012 Renesas Electronics America Inc All rights reserved Questions? 31 © 2012 Renesas Electronics America Inc All rights reserved Renesas Electronics America Inc © 2012 Renesas Electronics . Electronics America Inc. All rights reserved.3 Introduction Sensors fundamentals ADI sensors Sensors data acquisition ADI support for sensors applications Hands on lab Summary Agenda © 2012. rights reserved.4 Introduction The Sensor Fundamentals lab provides an introduction to some of the ADI sensors and to the evaluation boards for these sensors compatible with Renesas MCU platforms . rights reserved.7 Sensors Classification Sensors can be classified according to the physical property the sensor is designed to measure From a signal-conditioning viewpoint, sensors can be