2016-11-10 11:55:48 -07:00
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/*
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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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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <unistd.h>
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#include <stdio.h>
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#include "mcp2515.h"
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int main(int argc, char **argv)
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{
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//! [Interesting]
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2017-03-30 17:34:05 -06:00
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#if defined(CONFIG_BOARD_ARDUINO_101)
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// ARDUINO_101 (Quark core) where you must use SPI
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// Instantiate a MCP2515 instance using default SPI bus and pin 10 as CS
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mcp2515_context sensor = mcp2515_init(0, 10);
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#else
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2016-11-10 11:55:48 -07:00
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// Instantiate a MCP2515 on SPI bus 0 using a hw CS pin (-1).
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mcp2515_context sensor = mcp2515_init(0, -1);
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2017-03-30 17:34:05 -06:00
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#endif
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2016-11-10 11:55:48 -07:00
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if (!sensor)
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{
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printf("mcp2515_init() failed\n");
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return 1;
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}
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printf("Setting loopback mode...\n");
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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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if (mcp2515_set_opmode(sensor, MCP2515_OPMODE_LOOPBACK))
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{
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printf("mcp2515_set_opmode(loopback) failed.\n");
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return 1;
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}
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// lets build up a packet and try loading it.
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uint8_t myPayload[8] = {0, 1, 2, 3, 4, 5, 6, 7};
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printf("Loading a packet of 8 numbers (0-7) into a TX buffer...\n");
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if (mcp2515_load_tx_buffer(sensor, MCP2515_TX_BUFFER0, 0, false, false,
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myPayload, 8))
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{
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printf("mcp2515_load_tx_buffer() failed\n");
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return 1;
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}
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// now lets try to transmit it
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printf("Transmitting packet...\n");
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upm_result_t rv = 0;
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if ((rv = mcp2515_transmit_buffer(sensor, MCP2515_TX_BUFFER0, true)))
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{
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printf("mcp2515_transmit_buffer() failed with code %d\n", rv);
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return 1;
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}
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printf("Transmit successful\n");
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// There should now be a packet waiting for us in RXB0
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if (mcp2515_rx_status_msgs(sensor) == MCP2515_RXMSG_RXB0)
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{
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printf("Packet received in RXB0, decoding...\n");
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// now lets retrieve it
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MCP2515_MSG_T msg;
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if (mcp2515_get_rx_msg(sensor, MCP2515_RX_BUFFER0, &msg))
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{
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printf("mcp2515_get_rx_msg() failed\n");
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return 1;
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}
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mcp2515_print_msg(sensor, &msg);
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}
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else
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{
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printf("No packet found, how strange.\n");
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}
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printf("Exiting...\n");
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mcp2515_close(sensor);
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//! [Interesting]
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return 0;
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}
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