/* * Author: Jon Trulson * Copyright (c) 2015 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 #include int shouldRun = true; void sig_handler(int signo) { if (signo == SIGINT) shouldRun = false; } volatile unsigned int counter = 0; // Our interrupt handler void rpr220_isr(void *arg) { counter++; } int main() { signal(SIGINT, sig_handler); //! [Interesting] // This example uses an interrupt handler to increment a counter // Instantiate an RPR220 digital pin D2 // This was tested on the Grove IR Reflective Sensor rpr220_context sensor = rpr220_init(2); if (!sensor) { printf("rpr220_init() failed\n"); return 1; } // Here, we setup our Interupt Service Routine (ISR) to count // 'black' pulses detected. We do not pass an argument to the // interrupt handler (NULL). rpr220_install_isr(sensor, rpr220_isr, NULL); while (shouldRun) { printf("Counter: %d\n", counter); upm_delay(1); } printf("Exiting...\n"); rpr220_close(sensor); //! [Interesting] return 0; }