| /**************************************************************************** |
| * apps/modbus/nuttx/portevent.c |
| * |
| * FreeModbus Library: NuttX Port |
| * Copyright (c) 2006 Christian Walter <wolti@sil.at> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include "modbus/mb.h" |
| #include "modbus/mbport.h" |
| |
| #include "port.h" |
| |
| /**************************************************************************** |
| * Private Data |
| ****************************************************************************/ |
| |
| static eMBEventType eQueuedEvent; |
| static bool xEventInQueue; |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| bool xMBPortEventInit(void) |
| { |
| xEventInQueue = false; |
| return true; |
| } |
| |
| bool xMBPortEventPost(eMBEventType eEvent) |
| { |
| xEventInQueue = true; |
| eQueuedEvent = eEvent; |
| return true; |
| } |
| |
| bool xMBPortEventGet(eMBEventType * eEvent) |
| { |
| bool xEventHappened = false; |
| |
| if (xEventInQueue) |
| { |
| *eEvent = eQueuedEvent; |
| xEventInQueue = false; |
| xEventHappened = true; |
| } |
| else |
| { |
| /* Poll the serial device. The serial device timeouts if no |
| * characters have been received within for t3.5 during an |
| * active transmission or if nothing happens within a specified |
| * amount of time. Both timeouts are configured from the timer |
| * init functions. |
| */ |
| |
| xMBPortSerialPoll(); |
| |
| /* Check if any of the timers have expired. */ |
| |
| vMBPortTimerPoll(); |
| } |
| |
| return xEventHappened; |
| } |