1 /* 2 * Author: Thomas Ingleby <thomas.c.ingleby (at) 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 "mraa.h" 26 #include <unistd.h> 27 #include <stdint.h> 28 29 int 30 main(int argc, char** argv) 31 { 32 mraa_init(); 33 //! [Interesting] 34 mraa_spi_context spi; 35 spi = mraa_spi_init(0); 36 unsigned int response = 0; 37 printf("Hello, SPI initialised\n"); 38 uint8_t data[] = { 0x00, 100 }; 39 uint8_t* recv; 40 while (1) { 41 int i; 42 for (i = 90; i < 130; i++) { 43 data[1] = i; 44 recv = mraa_spi_write_buf(spi, data, 2); 45 printf("Writing -%i", i); 46 printf("RECIVED-%i-%i\n", recv[0], recv[1]); 47 usleep(100000); 48 } 49 for (i = 130; i > 90; i--) { 50 data[1] = i; 51 recv = mraa_spi_write_buf(spi, data, 2); 52 printf("Writing -%i", i); 53 printf("RECIVED-%i-%i\n", recv[0], recv[1]); 54 usleep(100000); 55 } 56 } 57 //! [Interesting] 58 } 59
