220653f21c
Author: anchao <anchao@pinecone.net>
apps/, most main() function: Correct CONFIG_BUILD_LOADABLE usage
Loadable apps/: Correct loadable symbol table generate
apps/system/ubloxmodem: Fix build break
apps/examples/ostest: start restart/waitpid/user test from main loop
apps/nshlib: Expand reboot and poweroff commands to include a second, optional mode argument
Author: Gregory Nutt <gnutt@nuttx.org>
An attempt to fix build issues. Does not work.
apps/examples/ostest: Fix some inappropriate renaming of static functions introduced with recent patches.
apps/builtin/exec_builtin.c: Fix a error introduced by recent comments. Found in build testing.
Author: anchao <anchao@pinecone.net>
apps/builtin/exec_builtin.c: Try posix_spawn if builtin apps do not have have an entry point.
apps/Application.mk: introduce MODULE config to simplify tristate(m)
apps/nsh: Change the nuttx shell module type to tristate
apps: Add loadable application support
script/mksymtab: Generate symbol table name by default
apps/builtin: Allow loadable applications can register with apps/builtin.
120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/****************************************************************************
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* examples/rfid_readuid/rfid_readuid.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* 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
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <nuttx/contactless/mfrc522.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_CL_MFRC522
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# error "CONFIG_CL_MFRC522 is not defined in the configuration"
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#endif
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#ifndef CONFIG_EXAMPLES_RFID_READUID_DEVNAME
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# define CONFIG_EXAMPLES_RFID_READUID_DEVNAME "/dev/rfid0"
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* rfid_readuid_main
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****************************************************************************/
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#ifdef BUILD_MODULE
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int main(int argc, FAR char *argv[])
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#else
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int rfid_readuid_main(int argc, char *argv[])
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#endif
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{
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int fd;
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int ret;
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int count = 0;
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char buffer[10];
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fd = open(CONFIG_EXAMPLES_RFID_READUID_DEVNAME, O_RDONLY);
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if (fd < 0)
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{
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printf("Failed to open %s\n", CONFIG_EXAMPLES_RFID_READUID_DEVNAME);
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return -1;
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}
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/* Try to read a card up to 3 times */
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while (count < 3)
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{
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printf("Trying to READ: ");
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/* 11 bytes = 0x12345678\0 */
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ret = read(fd, buffer, 11);
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if (ret == 11)
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{
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printf("RFID CARD UID = %s\n", buffer);
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break;
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}
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if (ret == -EAGAIN || ret == -EPERM)
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{
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printf("Card is not present!\n");
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}
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else
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{
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printf("Unknown error!\n");
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}
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/* Wait 500ms before trying again */
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usleep(500000);
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count++;
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}
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return 0;
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}
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