e562c774cf
Following changes are done as a part of cleanup: 1. Moved the platform specific `C` examples from top level examples/ directory to platform/ subdirectory and renamed helloedison.c to gpio_edison.c 2. C specific examples are moved to a new c/ subdirectory. As a part of this process, examples are modified to follow same standards and few new examples are also added. 3. Include the newly added C examples to relevant API documentation 4. Ran clang-format for all source files in c/, c++/, platform/ subdirectories Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
/*
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* Author: Jon Trulson <jtrulson@ics.com>
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Example usage: Search and print the found OW device ID recursively.
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*
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*/
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/* standard headers */
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#include "stdio.h"
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/* mraa header */
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#include "mraa.h"
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int
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main(void)
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{
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mraa_uart_ow_context uart_ow;
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mraa_result_t status;
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uint8_t id[MRAA_UART_OW_ROMCODE_SIZE];
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uint8_t count = 0;
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//! [Interesting]
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uart_ow = mraa_uart_ow_init(0);
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if (uart_ow == NULL) {
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fprintf(stderr, "Failed to initialize UART OW\n");
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mraa_deinit();
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return EXIT_FAILURE;
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}
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// Reset the ow bus and see if anything is present
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status = mraa_uart_ow_reset(uart_ow);
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if (status == MRAA_SUCCESS) {
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fprintf(stdout, "Reset succeeded, device(s) detected!\n");
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} else {
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goto err_exit;
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}
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fprintf(stdout, "Looking for devices...\n");
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/*
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* we are essentially doing a binary tree search through the 64
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* bit address space. id is modified during this search, and will
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* be set to the valid rom code for each device found.
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*
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* start the search from scratch
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*/
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status = mraa_uart_ow_rom_search(uart_ow, 1, id);
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if (status != MRAA_SUCCESS) {
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goto err_exit;
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}
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while (status == MRAA_SUCCESS) {
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/* The first byte (id[0]]) is the device type (family) code.
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* The last byte (id[7]) is the rom code CRC value. The
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* intervening bytes (id[1]-id[6]) are the unique 48 bit
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* device ID.
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*/
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fprintf(stdout, "Device %02d Type 0x%02x ID %02x%02x%02x%02x%02x%02x CRC 0x%02x\n", count,
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id[0], id[6], id[5], id[4], id[3], id[2], id[1], id[7]);
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count++;
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// continue the search with start argument set to 0
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status = mraa_uart_ow_rom_search(uart_ow, 0, id);
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}
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/* stop uart_ow */
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mraa_uart_ow_stop(uart_ow);
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//! [Interesting]
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/* deinitialize mraa for the platform (not needed most of the time) */
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mraa_deinit();
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return EXIT_SUCCESS;
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err_exit:
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mraa_result_print(status);
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/* stop uart_ow */
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mraa_uart_ow_stop(uart_ow);
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/* deinitialize mraa for the platform (not needed most of the times) */
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mraa_deinit();
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return EXIT_FAILURE;
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}
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