Analog Read¶
About¶
Read the value of an analog pin periodically once every second and print the read value to standard output.
Source code¶
/**
* @file main.c
*
* @section License
* Copyright (C) 2015-2016, Erik Moqvist
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* 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. */
analog_input_pin_init(&pin, &pin_a0_dev);
while (1) {
/* Wait one second. */
thrd_sleep_ms(1000);
/* Read the analog pin value and print it. */
value = analog_input_pin_read(&pin);
std_printf(FSTR("value = %d\r\n"), value);
}
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