93 lines
3.0 KiB
C
93 lines
3.0 KiB
C
/*
|
|
* 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]
|