1/* 2 * Author: Thomas Ingleby <thomas.c.ingleby@intel.com> 3 * Copyright (c) 2014 Intel Corporation. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25#include <unistd.h> 26#include <signal.h> 27#include <stdint.h> 28 29#include "mraa.hpp" 30 31int running = 0; 32 33void 34sig_handler(int signo) 35{ 36 if (signo == SIGINT) { 37 printf("closing spi nicely\n"); 38 running = -1; 39 } 40} 41 42int 43main() 44{ 45 signal(SIGINT, sig_handler); 46 47 //! [Interesting] 48 mraa::Spi* spi; 49 50 spi = new mraa::Spi(0); 51 52 uint8_t data[] = { 0x00, 100 }; 53 uint8_t rxBuf[2]; 54 uint8_t* recv; 55 while (running == 0) { 56 int i; 57 for (i = 90; i < 130; i++) { 58 data[1] = i; 59 recv = spi->write(data, 2); 60 printf("Writing -%i", i); 61 if (recv) { 62 printf("RECIVED-%i-%i\n", recv[0], recv[1]); 63 free(recv); 64 } 65 usleep(100000); 66 } 67 for (i = 130; i > 90; i--) { 68 data[1] = i; 69 if (spi->transfer(data, rxBuf, 2) == mraa::SUCCESS) { 70 printf("Writing -%i", i); 71 printf("RECIVED-%i-%i\n", rxBuf[0], rxBuf[1]); 72 } 73 usleep(100000); 74 } 75 } 76 delete spi; 77 //! [Interesting] 78 79 return mraa::SUCCESS; 80} 81