wn/libmbus
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added program to switch baudrate of M-Bus slave (untested)

Browse Source
This commit is contained in:
Stefan Wahren 2012-04-08 18:43:13 +02:00
parent ef87360669
commit 96fb4a9335
4 changed files with 171 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
bin/Makefile.am
View File

@ -16,7 +16,8 @@ noinst_HEADERS =
bin_PROGRAMS = mbus-tcp-scan mbus-tcp-request-data \
mbus-tcp-select-secondary mbus-tcp-scan-secondary \
mbus-serial-scan mbus-serial-request-data \
mbus-serial-select-secondary mbus-serial-scan-secondary
mbus-serial-select-secondary mbus-serial-scan-secondary \
mbus-serial-switch-baudrate
# tcp
mbus_tcp_scan_LDFLAGS = -L$(top_builddir)/mbus
@ -52,3 +53,7 @@ mbus_serial_scan_secondary_LDFLAGS = -L$(top_builddir)/mbus
mbus_serial_scan_secondary_LDADD = -lmbus
mbus_serial_scan_secondary_SOURCES = mbus-serial-scan-secondary.c
mbus_serial_switch_baudrate_LDFLAGS = -L$(top_builddir)/mbus
mbus_serial_switch_baudrate_LDADD = -lmbus
mbus_serial_switch_baudrate_SOURCES = mbus-serial-switch-baudrate.c

90
bin/mbus-serial-switch-baudrate.c Normal file
View File

@ -0,0 +1,90 @@
//------------------------------------------------------------------------------
// Copyright (C) 2010-2012, Robert Johansson and contributors, Raditex AB
// All rights reserved.
//
// FreeSCADA
// http://www.FreeSCADA.com
// freescada@freescada.com
//
// Contributors:
// Large parts of this file was contributed by Stefan Wahren.
//
//------------------------------------------------------------------------------
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <mbus/mbus.h>
//------------------------------------------------------------------------------
// Execution starts here:
//------------------------------------------------------------------------------
int
main(int argc, char **argv)
{
mbus_handle *handle;
mbus_frame reply;
char *device;
int address, ret;
int source_baudrate = 9600, target_baudrate;
if (argc == 4)
{
device = argv[1];
address = atoi(argv[2]);
target_baudrate = atoi(argv[3]);
}
else if (argc == 6 && strcmp(argv[1], "-b") == 0)
{
source_baudrate = atoi(argv[2]);
device = argv[3];
address = atoi(argv[4]);
target_baudrate = atoi(argv[5]);
}
else
{
fprintf(stderr, "usage: %s device address target-baudrate\n", argv[0]);
return 0;
}
if ((handle = mbus_connect_serial(device)) == NULL)
{
printf("Failed to setup connection to M-bus device: %s\n", mbus_error_str());
return -1;
}
if (mbus_serial_set_baudrate(handle->m_serial_handle, source_baudrate) == -1)
{
printf("Failed to set baud rate.\n");
return -1;
}
if (mbus_send_switch_baudrate_frame(handle, address, target_baudrate) == -1)
{
printf("Failed to send switch baudrate frame: %s\n", mbus_error_str());
return -1;
}
ret = mbus_recv_frame(handle, &reply);
if (ret == -1)
{
printf("No reply from device\n");
return -1;
}
if (mbus_frame_type(&reply) != MBUS_FRAME_TYPE_ACK)
{
printf("Unknown reply:\n");
mbus_frame_print(&reply);
}
mbus_disconnect(handle);
return 0;
}

64
mbus/mbus-protocol-aux.c
View File

@ -1253,6 +1253,70 @@ mbus_send_select_frame(mbus_handle * handle, const char *secondary_addr_str)
return 0;
}
//------------------------------------------------------------------------------
// send a user data packet from master to slave: the packet let the
// adressed slave(s) switch to the given baudrate
//------------------------------------------------------------------------------
int
mbus_send_switch_baudrate_frame(mbus_handle * handle, int address, int baudrate)
{
int retval = 0;
int control_information = 0;
mbus_frame *frame;
switch (baudrate)
{
case 300:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_300;
break;
case 600:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_600;
break;
case 1200:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_1200;
break;
case 2400:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_2400;
break;
case 4800:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_4800;
break;
case 9600:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_9600;
break;
case 19200:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_19200;
break;
case 38400:
control_information = MBUS_CONTROL_INFO_SET_BAUDRATE_38400;
break;
default:
MBUS_ERROR("%s: invalid baudrate %d\n", __PRETTY_FUNCTION__, baudrate);
return -1;
}
frame = mbus_frame_new(MBUS_FRAME_TYPE_CONTROL);
if (frame == NULL)
{
MBUS_ERROR("%s: failed to allocate mbus frame.\n", __PRETTY_FUNCTION__);
return -1;
}
frame->control = MBUS_CONTROL_MASK_SND_UD | MBUS_CONTROL_MASK_DIR_M2S;
frame->address = address;
frame->control_information = control_information;
if (mbus_send_frame(handle, frame) == -1)
{
MBUS_ERROR("%s: failed to send mbus frame.\n", __PRETTY_FUNCTION__);
retval = -1;
}
mbus_frame_free(frame);
return retval;
}
//------------------------------------------------------------------------------
// send a request packet to from master to slave
//------------------------------------------------------------------------------

11
mbus/mbus-protocol-aux.h
View File

@ -186,6 +186,17 @@ int mbus_send_frame(mbus_handle * handle, mbus_frame *frame);
*/
int mbus_send_select_frame(mbus_handle * handle, const char *secondary_addr_str);
/**
* Sends switch baudrate frame using "unified" handle
*
* @param handle Initialized handle
* @param address Address (0-255)
* @param baudrate Baudrate (300,600,1200,2400,4800,9600,19200,38400)
*
* @return Zero when successful.
*/
int mbus_send_switch_baudrate_frame(mbus_handle * handle, int address, int baudrate);
/**
* Sends data request frame to given slave using "unified" handle
*