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

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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
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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
*