Analog Read¶
About¶
Read the value of an analog pin periodically once every second and print the read value to standard output.
Source code¶
/**
* @section License
*
* The MIT License (MIT)
*
* Copyright (c) 2014-2016, 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. */
analog_input_pin_init(&pin, &pin_a0_dev);
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