97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/*
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* Copyright (c) 2016, Benoît Thébaudeau <benoit@wsystem.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \file
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* Example demonstrating how to use the FAT file system.
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include "contiki.h"
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#include "ff.h"
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/*---------------------------------------------------------------------------*/
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PROCESS(example_fat_process, "FAT example");
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AUTOSTART_PROCESSES(&example_fat_process);
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/*---------------------------------------------------------------------------*/
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#define TEST_FILENAME "test.txt"
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#define TEST_LINE "Hello world!"
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(example_fat_process, ev, data)
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{
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static FATFS FatFs; /* Work area (file system object) for logical drive */
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FIL fil; /* File object */
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char line[82]; /* Line buffer */
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FRESULT fr; /* FatFs return code */
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PROCESS_BEGIN();
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printf("FAT example\n");
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/* Register work area to the default drive */
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f_mount(&FatFs, "", 0);
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printf("Writing \"%s\" to \"%s\"\n", TEST_LINE, TEST_FILENAME);
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/* Create the test file */
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fr = f_open(&fil, TEST_FILENAME, FA_WRITE | FA_CREATE_ALWAYS);
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if(fr) {
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printf("f_open() error: %d\n", fr);
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PROCESS_EXIT();
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}
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/* Write the test line */
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f_printf(&fil, "%s\n", TEST_LINE);
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/* Close the file */
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f_close(&fil);
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printf("Reading back \"%s\":\n\n", TEST_FILENAME);
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/* Open the test file */
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fr = f_open(&fil, TEST_FILENAME, FA_READ);
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if(fr) {
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printf("f_open() error: %d\n", fr);
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PROCESS_EXIT();
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}
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/* Read all the lines and display them */
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while(f_gets(line, sizeof(line), &fil)) {
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printf(line);
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}
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/* Close the file */
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f_close(&fil);
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printf("\nDone\n");
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PROCESS_END();
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}
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