Simulink supports serial devices including RS-232 using Instrument Control Toolbox. Electronic parts catalog opel epc 2017. This basic Simulink example shows you how to configure and acquire data from an RS-232 serial device. An oscilloscope was used as the serial device in this model, but the model can be adapted for other devices.

Introduction In this example, the Simulink models and are used to explain how to decode raw National Marine Electronics Association (NMEA) data from a GPS shield on an Arduino hardware. NMEA Data From GPS Receiver on GPS Shield National Marine Electronics Association (NMEA) format is a specification that defines how data is transmitted between various marine electronic devices. GPS receiver, a marine electronic device, also transmits data in NMEA format. The data is transmitted in a sequence called a sentence. Each sentence contains information, such as latitude, longitude, speed, and time, as ASCII characters. A sentence can have a maximum of 80 characters. Each sentence is independent of other sentences from the receiver.

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NMEA Sentence Format. Connect the GPS antenna to the GPS shield. Connect the Arduino board to your computer using a USB cable. Wait for the GPS Fix LED on the GPS shield to start glowing. A glowing LED indicates that the GPS shield is acquiring satellite signals. Signals are acquired easily in locations that have a clear view of the sky.

If you are using the shield for the first time, the shield might take a few minutes to acquire signals. Step 2: Configure the Serial Receive Block This section explains how to configure the block to receive raw serial NMEA sentences from the GPS shield. Open the model. This model is configured to run in External mode. In this model, the GPS Shield sends data to the Serial port 1 of the Arduino hardware. The received data is stored in MATLAB® Workspace variables.

Parameter Value Description _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Port number 1 The serial port on Arduino that is connected to the GPS shield. Data type uint8 The data type of data in NMEA sentence from the GPS shield. Set this value to uint8 because the data in NMEA sentences are in ASCII characters. Data length 32 The number of bytes received in each time step. Sample time 0.03 The serial data from the GPS shield follows 9600 8N1 format. This format corresponds to 9600 baud rate, 8 data bits (one byte), no parity, and one stop bit. The time required to send one byte of serial data is 10/9600 seconds (~1 millisecond). So, the time required to send 32 bytes of data is ~32 milliseconds. Hence, specify Sample time as. Step 4: Configure the Model for Arduino Hardware Note: If the UBlox Neo-6M GPS shield is connected to your Arduino Mega 2560 board using Serial port 1, you can skip this section.

To configure the model, click the Model Configuration Parameters button on the Simulink toolbar. In the Configurations Parameters dialog box, select Hardware Implementation.

From the Hardware board list, select the type of Arduino board that you are using. From the Groups list under Target hardware resources, select Serial port properties. Set a baud rate of the serial port to which the GPS shield is connected. In this example, the Serial 1 baud rate parameter is set because the TX1 and RX1 pins connected to the GPS shield correspond to Serial port 1 of Arduino Mega 2650. Select a baud rate that is same as the baud rate of the GPS shield.

The baud rate of the GPS shield used in this example is 9600. Click OK to close the dialog box. Step 5: Run the Model in External Mode 1. On the model toolbar, set Simulation mode to External. The Simulation stop time is specified as 10.0 seconds. To run the model for an indefinite period, enter inf. Click the Run button.

The lower left corner of the model window displays status while Simulink prepares, downloads, and runs the model on the hardware. The TX pin of the GPS shield transmits raw NMEA sentences to the RX1 pin of the Arduino hardware. The algorithm decodes the data and stores the data in MATLAB Workspace variables data_rdy, time, latitude, longitude, num_satellite, and speed.