esp-idf/components/freemodbus/port/port.c
Alex Lisitsyn d0b9829eef examples: freemodbus add tcp support for common master/slave iface
Add TCP port files to provide Modbus TCP interface for communication
Add freemodbus add tcp support for common master/slave iface and tcp example based on socket API
The communication between master and slave checked for each example serial_master, serial_slave (use ModbusPoll TCP)
update tcp example according netif changes, fix ci issues
update TCP slave implementation
update example_test.py to to set IP through stdin
update API documentation
event bit instead of semahore to lock communication resource
update default options and master/slave port files

Closes https://github.com/espressif/esp-idf/issues/858
Closes IDF-452
2020-07-22 00:34:04 +08:00

147 lines
4.3 KiB
C

/* Copyright 2018 Espressif Systems (Shanghai) PTE LTD
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* FreeModbus Libary: RT-Thread Port
* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
*/
/* ----------------------- System includes --------------------------------*/
/* ----------------------- Modbus includes ----------------------------------*/
#include "freertos/FreeRTOS.h"
#include "sys/lock.h"
#include "port.h"
/* ----------------------- Variables ----------------------------------------*/
static _lock_t s_port_lock;
static UCHAR ucPortMode = 0;
/* ----------------------- Start implementation -----------------------------*/
inline void
vMBPortEnterCritical(void)
{
_lock_acquire(&s_port_lock);
}
inline void
vMBPortExitCritical(void)
{
_lock_release(&s_port_lock);
}
UCHAR
ucMBPortGetMode( void )
{
return ucPortMode;
}
void
vMBPortSetMode( UCHAR ucMode )
{
ENTER_CRITICAL_SECTION();
ucPortMode = ucMode;
EXIT_CRITICAL_SECTION();
}
#if MB_TCP_DEBUG
// This function is kept to realize legacy freemodbus frame logging functionality
void
prvvMBTCPLogFrame( const CHAR * pucMsg, UCHAR * pucFrame, USHORT usFrameLen )
{
int i;
int res = 0;
int iBufPos = 0;
size_t iBufLeft = MB_TCP_FRAME_LOG_BUFSIZE;
static CHAR arcBuffer[MB_TCP_FRAME_LOG_BUFSIZE];
assert( pucFrame != NULL );
for ( i = 0; i < usFrameLen; i++ ) {
// Print some additional frame information.
switch ( i )
{
case 0:
// TID = Transaction Identifier.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, "| TID = " );
break;
case 2:
// PID = Protocol Identifier.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " | PID = " );
break;
case 4:
// Length
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " | LEN = " );
break;
case 6:
// UID = Unit Identifier.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " | UID = " );
break;
case 7:
// MB Function Code.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " | FUNC = " );
break;
case 8:
// MB PDU rest.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " | DATA = " );
break;
default:
res = 0;
break;
}
if( res == -1 ) {
break;
}
else {
iBufPos += res;
iBufLeft -= res;
}
// Print the data.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, "%02X", pucFrame[i] );
if( res == -1 ) {
break;
} else {
iBufPos += res;
iBufLeft -= res;
}
}
if( res != -1 ) {
// Append an end of frame string.
res = snprintf( &arcBuffer[iBufPos], iBufLeft, " |" );
if( res != -1 ) {
ESP_LOGD(pucMsg, "%s", arcBuffer);
}
}
}
#endif