upm/examples/c++/tca9548a.cxx

/*
 * Author: Gerard Vidal <gerard.vidal@ens-lyon.fr>
 * 2017 IFE ENS de Lyon
 *
 *
 * 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.
 */

#include <unistd.h>
#include <iostream>
#include <sstream>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include "tca9548a.hpp"

using namespace std;
using namespace upm;

/*
 * This examble is built to multiplex channel 2 and Channel 4
 *
 */

void
showAllPorts(upm::TCA9548A *multiplex) {
    int i;
    char  ports [80];
    std::string convert;
    for (i = 0; i<8; i++) {
        if (multiplex->getPort(i))
            strcat (ports, "1." );
        else
            strcat (ports,"0.");
    }
    cout << "Ports: " << ports;
}

int main(int argc, char **argv)
{

    // Instantiate a TCA9548A instance of i2c multiplexer
    upm::TCA9548A *multiplex = new upm::TCA9548A(0);

    //Clean
    multiplex->disableAllPorts();
    cout << "All ports disabled.";

    // Open i2c bus on multiplexer channel 4
    multiplex->setPort(4,multiplex->ENABLED,multiplex->EXCLUSIVE);
    cout << "Port 4 enabled with exclusive access.";
    showAllPorts(multiplex);

    // Close com with channel 4
    multiplex->disableAllPorts();

    // Open i2c bus on multiplexer channel 2
    multiplex->setPort(2,multiplex->ENABLED,multiplex->EXCLUSIVE);
    cout << "Port 2 enabled with exclusive access.";
    showAllPorts(multiplex);

    //close com with channel 2
    multiplex->disableAllPorts();

    // Open 2 i2c bus on multiplexer channel 4 and channel2
    multiplex->setPort(4,multiplex->ENABLED,multiplex->EXCLUSIVE);
    multiplex->setPort(2,multiplex->ENABLED,multiplex->INCLUSIVE);
    cout << "Port 4 enabled with exclusive access.";
    cout << "Port 2 enabled with exclusive access.";
    showAllPorts(multiplex);

    //close com with all channels
    multiplex->disableAllPorts();

    // Open i2c bus on all multiplexer channels
    multiplex->enableAllPorts();
    cout << "All ports enabled.";
    showAllPorts(multiplex);

    //close com with all channels
    multiplex->disableAllPorts();

    delete multiplex;

    return 0;
}