mirror of
https://github.com/eclipse/upm.git
synced 2025-03-15 04:57:30 +03:00

The mcp2515 is a CAN bus controller. It was developed using the Seeed CAN bus shield. Signed-off-by: Jon Trulson <jtrulson@ics.com>
67 lines
2.3 KiB
JavaScript
67 lines
2.3 KiB
JavaScript
/*
|
|
* Author: Jon Trulson <jtrulson@ics.com>
|
|
* Copyright (c) 2016 Intel Corporation.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
var sensorObj = require('jsupm_mcp2515');
|
|
|
|
// Instantiate a MCP2515 on SPI bus 0 using a hw CS pin (-1).
|
|
var sensor = new sensorObj.MCP2515(0, -1);
|
|
|
|
// set the mode to loopback mode. In loopback mode, transmitted
|
|
// packets are sent directly to an appropriate receive buffer
|
|
// without actually going out onto the CAN bus.
|
|
sensor.setOpmode(sensorObj.MCP2515_OPMODE_LOOPBACK);
|
|
|
|
// lets build up a packet and try loading it (8 bytes max).
|
|
var myPayload = "01234567";
|
|
console.log("Loading a packet of 8 numbers (0-7) into a TX buffer...");
|
|
sensor.loadTXBuffer(sensorObj.MCP2515_TX_BUFFER0, 0, false, false, myPayload);
|
|
|
|
// now lets try to transmit it
|
|
console.log("Transmitting packet...");
|
|
sensor.transmitBuffer(sensorObj.MCP2515_TX_BUFFER0, true);
|
|
|
|
console.log("Transmit successful");
|
|
|
|
// There should now be a packet waiting for us in RXB0
|
|
if (sensor.rxStatusMsgs() == sensorObj.MCP2515_RXMSG_RXB0)
|
|
{
|
|
console.log("Packet received in RXB0, decoding...");
|
|
|
|
// now lets retrieve and print it
|
|
sensor.getRXMsg(sensorObj.MCP2515_RX_BUFFER0);
|
|
|
|
sensor.printMsg();
|
|
}
|
|
else
|
|
{
|
|
console.log("No packet found, how strange.");
|
|
}
|
|
|
|
console.log("Exiting...");
|
|
|
|
sensor = null;
|
|
sensorObj.cleanUp();
|
|
sensorObj = null;
|
|
process.exit(0);
|