Analog Read

About

Read the value of an analog pin periodically once every second and print the read value to standard output.

See the Analog input pin Library Reference for more details.

Source code

/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2018, Erik Moqvist
 *
 * 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.
 *
 * This file is part of the Simba project.
 */

#include "simba.h"

int main()
{
    int value;
    struct analog_input_pin_t pin;

    sys_start();
    analog_input_pin_module_init();

    /* Initialize the analog input pin. */
    if (analog_input_pin_init(&pin, &pin_a0_dev) != 0) {
        std_printf(FSTR("Failed to initialize the analog input pin.\r\n"));
        return (-1);
    }

    while (1) {
        /* Read the analog pin value and print it. */
        value = analog_input_pin_read(&pin);
        std_printf(FSTR("value = %d\r\n"), value);

        /* Wait 100 ms. */
        thrd_sleep_ms(100);
    }

    return (0);
}

The source code can also be found on Github in the examples/analog_read folder.

Build and run

Build and run the application.

$ cd examples/analog_read
$ make -s BOARD=<board> run
value = 234
value = 249
value = 230