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64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <iostream>
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#include <string>
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#include "mcp2515.hpp"
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#include "mcp2515_regs.h"
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using namespace std;
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int
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main(int argc, char** argv)
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{
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//! [Interesting]
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// Instantiate a MCP2515 on SPI bus 0 using a hw CS pin (-1).
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upm::MCP2515 sensor(0, -1);
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cout << "Setting loopback mode..." << endl;
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// set the mode to loopback mode. In loopback mode, transmitted
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// packets are sent directly to an appropriate receive buffer
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// without actually going out onto the CAN bus.
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sensor.setOpmode(MCP2515_OPMODE_LOOPBACK);
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// lets build up a packet and try loading it (8 bytes max).
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string myPayload = "01234567";
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cout << "Loading a packet of 8 numbers (0-7) into a TX buffer..." << endl;
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sensor.loadTXBuffer(MCP2515_TX_BUFFER0, 0, false, false, myPayload);
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// now lets try to transmit it
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cout << "Transmitting packet..." << endl;
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sensor.transmitBuffer(MCP2515_TX_BUFFER0, true);
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cout << "Transmit successful" << endl;
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// There should now be a packet waiting for us in RXB0
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if (sensor.rxStatusMsgs() == MCP2515_RXMSG_RXB0) {
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cout << "Packet received in RXB0, decoding..." << endl;
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// now lets retrieve and print it
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sensor.getRXMsg(MCP2515_RX_BUFFER0);
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sensor.printMsg();
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} else {
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cout << "No packet found, how strange." << endl;
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}
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cout << "Exiting..." << endl;
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//! [Interesting]
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return 0;
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}
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