This article will discuss the design and interface of a Low-power MEMS gyroscope with an Actel IGLOO FPGA. We will also look at two MEMS sensors: the Gyro CORTEX and InvenSense MPU-6050. Hopefully, these examples will help you in your design and implementation process. Let’s get started!
Low-power MEMS gyroscope
A low-power MEMS gyroometer interface to an FPGA has several advantages. The gyroscope’s input port applies an amplified adjustable feedback AC or constant DC voltage to the proof mass. The gyroscope includes signal conditioning circuits and a high-performance core FPGA chip. The algorithm in drive mode realizes an automatic gain control loop and a software phase-locked loop.
Low-power MEMS syringoscopes have lower power consumption than analog gyros and can operate at a lower supply voltage. As a result, a low-power MEMS gyroscope interface with an FPGA can be helpful in battery-powered applications.
The sensor node gets power through a USB connection or four AA batteries. A switch-mode buck regulator regulates the input voltage. As a result, the input voltage is 3.3 V. A voltage regulator connects to the USB input and controls the FPGA. A USB-to-I2C converter helps to power the sensor node. The FPGA can then be connected to the sensor node using two wires.
The MPU-60X0 low-power MEMS gyro is a three-axis accelerometer with independent vibratory MEMS rate gonioscopes. The three gyros detect rotation about the X, Y, and Z axes.
The MPU6050 supports the fpga I2C protocol. Its FIFO register supports burst reads and writes. During reads, the DMP uses some registers for setting configuration while others use others for sampling rate and Acc & Gyro parameters. This protocol is widely used and enables a low-power MEMS gyroscope interface with FPGA.
The FPGA also can manage multiple kinds of sensor interfaces. By integrating the FPGA as a sensor node, engineers can write logic to deal with a range of sensing parameters and reconfigure hardware. For example, we test FlexiS with SPI and FPGA I2C temperature sensors during the evaluation phase. As a result, its temperature sensing module, PmodTMP3, also supports the FPGA I2C protocol.
Actel IGLOO FPGA
The Actel IGLOO family is suitable for low-power applications among its FPGA products. It uses FLASH memory instead of SRAM and features fewer transistors. As a result, the company’s proprietary Flash*Freeze technology keeps the FPGAs in ultra-low-power mode. The IGLOO platform can fit into sensor node architectures.
The PowWow sensor node uses a 3-V power supply and consumes about 60 mW while in standby mode. The device consumes about two hundred milliwatts during reconfiguration and transmission. It only supports one type of reconfiguration: difference-based partial reconfiguration. This type of reconfiguration compares columns and depends on a Dijkstra-based algorithm.
An FPGA computer vision module helps to process image information and can work with the SNRP protocol. Industrial robots can also implement visual servoing algorithms using this module. In addition, these techniques help to improve robot navigation and localization. When combined with IGLOO FPGA technology, the technology can help to create robots in various applications.
The FPGAs that can interface a MEMS motion sensor with an I2C protocol can be helpful in various applications, including medical devices, automotive systems, and consumer electronics. FPGAs are highly versatile and are an excellent choice for any sensor-based application. This is a powerful combination of performance and low-power consumption. In addition, this technology offers a high degree of flexibility and we can customize it to meet a user’s specifications.
The Actel IGLOO FPGA can interface a MEMS motion sensor with the I2C protocol, making it easy for Rayming PCB & Assembly to create various applications. The Open Hardware Design (OHD) FPGA is compatible with the FPGA I2C protocol and has many projects and code examples. A user LED, seven buttons, and ESP32 for WiFI connectivity are just some available options. The device also features USB-serial and USB-to-FPGA interfaces.
InvenSense MPU-6050 sensor
InvenSense MPU-6050 accelerometer and gyro meter sensors are programmable hardware modules that interface with FPGA using the I2C protocol. Additionally. these sensors have a full-scale range of 2g and can measure gravitational acceleration to within +1g. This chip has 16-bit analog to digital converters and a Digital Motion Processor unit, which combines the raw sensor data and performs calculations to remove errors in each sensor. In addition, the breakout board contains a voltage regulator and an accelerometer.
The InvenSense MPU-6050 sensor board consists of an accelerometer, magnetometer, gyroscope, and 16bit analog-to-digital conversion hardware. The FPGA I2C protocol allows you to daisy chain multiple modules on the same I2C bus and avoid soldering. Each NCD master device includes a pull-up resistor, and each MPU-6050 has on-board 4.7K jumper-selectable pull-up resistors.
The MPU6050 contains a FIFO register for storing sensor data. The FIFO configuration register lets you determine what type of data you want to store in the FIFO. For example, the gyroscope and accelerometer sensors have a 1025-byte FIFO buffer. The microcontroller can read these, used in conjunction with an interrupt signal.
The I2Cdevlib library supports the InvenSense MPU-6050 sensor interface. The I2Cdevlib library focuses on the I2C serial bus and contains sub-libraries for various I2C-enabled devices. The MPU6050 sub-library is part of this library. Its source code is available on the Invensense website.
The FPGA and the InvenSense MPU-6050 connect via an I2C bus. This communication allows the processor to control motor speed and direction. A DC motor is necessary for stabilization, as the MPU-6050 does not have enough processing power. If the FPGA is not available, the sensors can be programmed using the Micro-B USB port.
Gyro CORTEX sensor
The TQM Gyro to NMEA converter converts gyro signals to NMEA format in aerospace applications. NMEA is a standard for measuring three-axis rotation, commonly referred to as pitch, roll, and yaw. TQM has implemented this interface in its FPGA for a smoother integration process.
The IEC 61162 series defines a digital interface between a compass and a radar. The sensor is 2. 5 mm in size and accesses ten independent measurements with an FPGA I2C protocol. The sensor can calculate altitude and angular momentum using the data it provides. In addition to allowing an FPGA to control the sensor, a Gyro CORTEX sensor can connect to an Arduino through I2C pins.
The bmi08x function declarations provide a secure chain of custody for data, while the firmware is suitable for easy integration and faster boot-up time. The F-series gyroscopes are available from leading manufacturers such as Autel, Logical Gyro, and SPI. In addition, several companies offer the I2C-based Gyro SPRINT-IQ, but the FXAS21002C is the preferred option for a DIY project.
The Gyro CORTEX sensor interface is easily configured with an FPGA board, unlike many other low-level sensors. The MPU-6050 gyroscope is a single chip that incorporates a high-level and low-level MEMS gyro. Its resonance frequency is 550 Hz. Aside from its excellent performance, the Gyro CORTEX sensor offers a complete monitoring and control environment.
A new generation of gyro sensors, known as iGyro SRS, is available. The PowerBox iGyro SRS uses MEMS technology and the Coriolis Effect for measuring and is designed using the latest software algorithms. In addition, the FPGA I2C protocol is the preferred communication protocol for gyro CORTEX sensors.