Network Discovery using C-Bus Module

[Valery R.]

I want to scan the network and find units, their addresses etc, using the cbus_discovery_ functions.

I've set the discovery parameters (cbus_discovery_vf_set_parameters(CBUS_DISCOVERY_U NIT_TYPE|CBUS_DISCOVERY_GROUPS)), registered a handler (discovery_handler(int8u network, int8u unit_address, int16u parameter, int8u *parameter_data, int8u byte_count)) and initiated discovery (cbus_discovery_vf_initiate(0)).

But when I read the parameter_data (in registered handler) I get only one first byte. So, for example for DIMDM8, I get: UNIT_TYPE - 68 (ASCII "D"), GROUPS - 4 (the first one in the list).
And I don't know how to get the other 7 bytes.

Valery R.

[ashleigh]

Here is some example code for a discovery handler:


/************************************************** **************************
* Append formatted text to a string. Something sprintf cannot do.
************************************************** **************************/
static int asprintf(char *cp_buffer,
const char *cp_format,
...)
{
va_list p_args;
int i_count;

va_start(p_args, cp_format);
i_count = vsprintf(&cp_buffer[strlen(cp_buffer)],
cp_format,
p_args);
va_end(p_args);
return i_count;
}


/************************************************** **************************
* The discovery handler
************************************************** **************************/
static void discovery_parameter_handler(int8u network,
int8u unit_address,
int16u parameter,
int8u * parameter_data,
int8u i_count)
{
char s[100];
int i;

sprintf(s, "Discovery : Unit %X",
unit_address);

switch (parameter)
{
case CBUS_DISCOVERY_NONE :
break;
case CBUS_DISCOVERY_UNIT_TYPE :
print_message("Discovery : ------------");
asprintf(s, ", type %.8s",
(char *) parameter_data);
break;
case CBUS_DISCOVERY_MANUFACTURER :
asprintf(s, ", manufacturer %.8s",
(char *) parameter_data);
break;
case CBUS_DISCOVERY_VERSION :
asprintf(s, ", version %.8s",
(char *) parameter_data);
break;
case CBUS_DISCOVERY_GROUPS :
asprintf(s, ", groups ");
for (i=0; i<i_count; i++)
{
asprintf(s, "%02X ",
parameter_data[i]);
}
break;
case CBUS_DISCOVERY_LEVELS :
asprintf(s, ", levels ");
for (i=0; i<i_count; i++)
{
asprintf(s, "%02X ",
parameter_data[i]);
}
break;
case CBUS_DISCOVERY_APPLICATIONS :
asprintf(s, ", apps ");
for (i=0; i<2; i++)
{
asprintf(s, "%02X ", parameter_data[i]);
}
break;
case CBUS_DISCOVERY_SERIAL_NUMBER :
asprintf(s, ", serial no ");
for (i=0; i<4; i++)
{
asprintf(s, "%02X", parameter_data[i]);
}
break;
case CBUS_DISCOVERY_STATUS :
if (parameter_data[0] & 0x01)
strcat(s, ", output unit");
else
strcat(s, ", input unit");
break;
case CBUS_DISCOVERY_AREA :
asprintf(s, ", area address %02X",
parameter_data[0]);
break;
case CBUS_DISCOVERY_CONFLICT :
strcat(s, ", unit address conflict");
break;
}
print_message(s);
}


/************************************************** **************************
* The discovery complete handler
************************************************** **************************/
static void discovery_complete_handler()
{
print_message("Discovery Complete");
}