www.gusucode.com > vnt 源码程序 matlab案例代码 > vnt/demoVNTSL_J1939CANCommunicationExample.m
%% Basic J1939 Communication over CAN % This example shows you how to use J1939 blocks to directly send and % receive Parameter Group (PG) messages in Simulink(R). % % Vehicle Network Toolbox(TM) provides J1939 Simulink blocks for receiving and % transmitting Parameter Groups via Simulink models over Controller Area Networks % (CAN). This example performs data transfer over a CAN bus using the J1939 % Network Configuration, J1939 Node Configuration, J1939 CAN Transport Layer, % J1939 Receive and J1939 Transmit blocks. It also uses Vector % Virtual CAN channels connected in a loopback configuration. %% % Copyright 2015 The MathWorks, Inc. %% % % <<../demoVNTSL_J1939CANCommunication_Model.png>> % %% Set Up J1939 Block Parameters % Create a model to set up J1939 receive and transmit over the network. The % model is configured to perform single frame transmission between two nodes % defined in the J1939 database file. % % * Use a J1939 Network Configuration block and select the CAN Database, % J1939.dbc. This J1939 database file consists of two nodes and a couple of % single-frame and multiframe messages. % * Use a J1939 CAN Transport Layer block and set the Device to Vector % Virtual Channel 1. The transport layer is configured to transfer J1939 % messages over CAN via the specified virtual channel. % * Use basic Simulink source blocks to connect to a J1939 Transmit block. % The J1939 Transmit block is set to queue data for transmit at each timestep % when the Trigger port is enabled. For this example, a periodic trigger % subsystem sends a high pulse every 50 milliseconds. % * Use the J1939 Receive block to receive the messages transmitted over % the network. %% Visualize Signals Received on the Network % Plot the results to see the vehicle signal values received over the network. % The X-axis corresponds to the simulation timestep. % % <<../demoVNTSL_J1939CANCommunication_Scope.png>> %