/* * Author: Noel Eck * Copyright (c) 2016 Intel Corporation. * * 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 #include #include "ldt0028.h" #include "upm_utilities.h" bool shouldRun = true; void sig_handler(int signo) { if (signo == SIGINT) shouldRun = false; } int main() { signal(SIGINT, sig_handler); //! [Interesting] // Instantiate a ldt0028 sensor on analog pin A0 ldt0028_context sensor = ldt0028_init(0); if (!sensor) { printf("ldt0028_init() failed.\n"); return -1; } // Set the aref, scale, and offset ldt0028_set_aref(sensor, 5.0); ldt0028_set_scale(sensor, 1.0); ldt0028_set_offset(sensor, -.1); printf("aRef: %0.03f scale: %0.03f offset: %0.03f\n\n", ldt0028_get_aref(sensor), ldt0028_get_scale(sensor), ldt0028_get_offset(sensor)); float normalized = 0.0; float raw_volts = 0.0; float volts = 0.0; float norm_base = 0.1; printf("Using normalized sensor output average == %f\n", norm_base); // Every half a second, sample the sensor output while (shouldRun) { ldt0028_get_normalized(sensor, &normalized); ldt0028_get_raw_volts(sensor, &raw_volts); ldt0028_get_volts(sensor, &volts); if (normalized > norm_base) { printf("Detected vibration!\n"); printf("Normalized output: %0.03f, raw ldt0028 sensor output: %0.03f v " "adjusted output: %0.03f v\n\n", normalized, raw_volts, volts); } upm_delay_ms(500); } //! [Interesting] printf("Exiting\n"); ldt0028_close(sensor); return 0; }