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/*
* Author: Jon Trulson <jtrulson@ics.com>
* 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 "stdio.h"
//! [Interesting]
#include "mraa.h"
int
main(int argc, char** argv)
{
mraa_uart_ow_context uart;
uart = mraa_uart_ow_init(0);
if (!uart) {
printf("mraa_uart_ow_init() failed\n");
return 1;
}
// Reset the ow bus and see if anything is present
mraa_result_t rv;
if ((rv = mraa_uart_ow_reset(uart)) == MRAA_SUCCESS) {
printf("Reset succeeded, device(s) detected!\n");
} else {
printf("Reset failed, returned %d. No devices on bus?\n", rv);
return 1;
}
printf("Looking for devices...\n");
uint8_t id[MRAA_UART_OW_ROMCODE_SIZE];
/* we are essentially doing a binary tree search through the 64
* bit address space. id is modified during this search, and will
* be set to the valid rom code for each device found.
*/
uint8_t count = 0;
// start the search from scratch
mraa_result_t result = mraa_uart_ow_rom_search(uart, 1, id);
if (result == MRAA_ERROR_UART_OW_NO_DEVICES) {
printf("No devices detected.\n");
return 1;
}
if (result == MRAA_ERROR_UART_OW_DATA_ERROR) {
printf("Bus/Data error.\n");
return 1;
}
while (result == MRAA_SUCCESS) {
/* The first byte (id[0]]) is the device type (family) code.
* The last byte (id[7]) is the rom code CRC value. The
* intervening bytes (id[1]-id[6]) are the unique 48 bit
* device ID.
*/
printf("Device %02d Type 0x%02x ID %02x%02x%02x%02x%02x%02x CRC 0x%02x\n", count, id[0],
id[6], id[5], id[4], id[3], id[2], id[1], id[7]);
count++;
// continue the search with start argument set to 0
result = mraa_uart_ow_rom_search(uart, 0, id);
}
printf("Exiting...\n");
mraa_uart_ow_stop(uart);
return 0;
}
//! [Interesting]
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