patch from Stefan Kratochwil <entwicklung@inovel.de> : canfestival-3-fm3_698.patch
Bug:
If an object dictionary entry was requested whose size exceeds
SDO_MAX_LENGTH_TRANSFERT, the memcpy() call at line 139 of objacces.c overwrites
the memory after *pDestData which causes stack corruption.
-> Bugfix:
The bug was corrected by size checking the requested data. An 'Out of
memory' error message will be generated if the requested data exceeds
SDO_MAX_LENGTH_TRANSFERT.
Additional changes:
Added dynamic buffer allocation for the SDO transfer. This feature can be used
if SDO_DYNAMIC_BUFFER_ALLOCATION is defined in config.h. The size of the
dynamically allocated buffer is controlled with
SDO_DYNAMIC_BUFFER_ALLOCATION_SIZE.
-> Note:
This change removes the detection of OD_LENGTH_DATA_INVALID errors!
/*
This file is part of CanFestival, a library implementing CanOpen Stack.
Copyright (C): Edouard TISSERANT and Francis DUPIN
AT91 Port: Peter CHRISTEN
See COPYING file for copyrights details.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __CAN_AT91__
#define __CAN_AT91__
#include "config.h"
// Canfestivals includes
#include "can.h"
// Number of receive MB
#define NB_MB 8
#define NB_RX_MB 4
// Number of transmit MB
#define NB_TX_MB (NB_MB - NB_RX_MB)
#if (NB_TX_MB < 1)
#error define less RX MBs, you must have at least 1 TX MB!
#elif (NB_RX_MB < 1)
#error define at least 1 RX MBs!
#endif
#define START_TX_MB NB_RX_MB
#define TX_INT_MSK ((0xFF << (NB_MB - NB_TX_MB)) & 0xFF)
#define RX_INT_MSK (0xFF >> (NB_MB - NB_RX_MB))
/************************* To be called by user app ***************************/
unsigned char canInit(unsigned int bitrate);
unsigned char canSend(CAN_PORT notused, Message *m);
unsigned char canReceive(Message *m);
#endif