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/**************************************************************************
*
* Copyright (C) 2012 Steve Karg <skarg@users.sourceforge.net>
* Copyright (C) 2017 Mario de Sousa <msousa@fe.up.pt>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
/* Multi-state Value Objects */
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "config_bacnet_for_beremiz_%(locstr)s.h" /* the custom configuration for beremiz pluginh */
#include "bacdef.h"
#include "bacdcode.h"
#include "bacenum.h"
#include "bacapp.h"
#include "rp.h"
#include "wp.h"
#include "msv_%(locstr)s.h"
#include "handlers.h"
/* we choose to have a NULL level in our system represented by */
/* a particular value. When the priorities are not in use, they */
/* will be relinquished (i.e. set to the NULL level). */
/* Since multi state value objects can never take the value 0, we
* use 0 as our NULL value.
* See ASHRAE 135-2016, section 12.20.4
*/
#define MSV_VALUE_NULL (0)
#define MSV_VALUE_IS_NULL(x) ((x) == MSV_VALUE_NULL)
/* When all the priorities are level null, the present value returns */
/* the Relinquish Default value */
#define MSV_VALUE_RELINQUISH_DEFAULT 1
/* The IEC 61131-3 located variables mapped onto the Multi-state Value objects of BACnet protocol */
%(MSV_lvars)s
/* The array where we keep all the state related to the Multi-state Value Objects */
#define MAX_MULTISTATE_VALUES %(MSV_count)s
static MULTISTATE_VALUE_DESCR MSV_Descr[MAX_MULTISTATE_VALUES] = {
%(MSV_param)s
};
/* These three arrays are used by the ReadPropertyMultiple handler,
* as well as to initialize the XXX_Property_List used by the
* Property List (PROP_PROPERTY_LIST) property.
*/
static const int Multistate_Value_Properties_Required[] = {
/* (1) Currently Supported */
/* (2) Required by standard ASHRAE 135-2016 */
/*(1)(2) */
PROP_OBJECT_IDENTIFIER, /* R R ( 75) */
PROP_OBJECT_NAME, /* R R ( 77) */
PROP_OBJECT_TYPE, /* R R ( 79) */
PROP_PRESENT_VALUE, /* W R ( 85) */
PROP_STATUS_FLAGS, /* R R (111) */
PROP_EVENT_STATE, /* R R ( 36) */
PROP_OUT_OF_SERVICE, /* W R ( 81) */
PROP_NUMBER_OF_STATES, /* R R ( 74) */
// PROP_PROPERTY_LIST, /* R R (371) */
-1
};
static const int Multistate_Value_Properties_Optional[] = {
PROP_DESCRIPTION, /* R O ( 28) */
PROP_STATE_TEXT, /* R O (110) */
/* required if Present_Value is writable (which is true in our case!) */
PROP_PRIORITY_ARRAY, /* R O ( 87) */
PROP_RELINQUISH_DEFAULT, /* R O (104) */
// PROP_CURRENT_COMMAND_PRIORITY,/* R O (431) */
-1
};
static const int Multistate_Value_Properties_Proprietary[] = {
-1
};
/* This array stores the PROPERTY_LIST which may be read by clients.
* End of list is marked by following the last element with the value '-1'
*
* It is initialized by Multistate_Value_Init() based off the values
* stored in Multistate_Value_Properties_Required
* Multistate_Value_Properties_Optional
* Multistate_Value_Properties_Proprietary
*/
/* TODO: Allocate memory for this array with malloc() at startup */
static int Multistate_Value_Properties_List[64];
/********************************************************/
/** Callback functions. **/
/** Functions required by BACnet devie implementation. **/
/********************************************************/
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
void Multistate_Value_Property_Lists(
const int **pRequired,
const int **pOptional,
const int **pProprietary)
{
if (pRequired)
*pRequired = Multistate_Value_Properties_Required;
if (pOptional)
*pOptional = Multistate_Value_Properties_Optional;
if (pProprietary)
*pProprietary = Multistate_Value_Properties_Proprietary;
return;
}
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
void Multistate_Value_Init(
void)
{
unsigned int i, j;
/* initialize the Multistate_Value_Properties_List array */
int len = 0;
len += BACnet_Init_Properties_List(Multistate_Value_Properties_List + len,
Multistate_Value_Properties_Required);
len += BACnet_Init_Properties_List(Multistate_Value_Properties_List + len,
Multistate_Value_Properties_Optional);
len += BACnet_Init_Properties_List(Multistate_Value_Properties_List + len,
Multistate_Value_Properties_Proprietary);
/* initialize all the analog output priority arrays to NULL */
for (i = 0; i < MAX_MULTISTATE_VALUES; i++) {
for (j = 0; j < BACNET_MAX_PRIORITY; j++) {
MSV_Descr[i].Present_Value[j] = MSV_VALUE_NULL;
}
for (j = 0; j < MSV_Descr[i].Number_Of_States; j++) {
sprintf(MSV_Descr[i].State_Text[j], "State %%d", j+1);
}
}
return;
}
/* validate that the given instance exists */
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
bool Multistate_Value_Valid_Instance(
uint32_t object_instance)
{
// fprintf(stderr, "BACnet plugin: Multistate_Value_Valid_Instance(obj_ID=%%u) called!\n", object _instance);
return (Multistate_Value_Instance_To_Index(object_instance) < MAX_MULTISTATE_VALUES);
}
/* the number of Multistate Value Objects */
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
unsigned Multistate_Value_Count(void) {return MAX_MULTISTATE_VALUES;}
/* returns the instance (i.e. Object Identifier) that correlates to the correct index */
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
uint32_t Multistate_Value_Index_To_Instance(unsigned index) {return MSV_Descr[index].Object_Identifier;}
/* returns the index that correlates to the correct instance number (Object Identifier) */
unsigned Multistate_Value_Instance_To_Index(
uint32_t object_instance)
{
unsigned index = 0;
for (index = 0; index < MAX_MULTISTATE_VALUES; index++)
if (object_instance == MSV_Descr[index].Object_Identifier)
return index;
/* error, this object ID is not in our list! */
return MAX_MULTISTATE_VALUES;
}
uint32_t Multistate_Value_Present_Value(
uint32_t object_instance)
{
uint32_t value = MSV_VALUE_RELINQUISH_DEFAULT;
unsigned index = 0; /* offset from instance lookup */
unsigned i = 0;
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
for (i = 0; i < BACNET_MAX_PRIORITY; i++) {
if (!MSV_VALUE_IS_NULL(MSV_Descr[index].Present_Value[i])) {
value = MSV_Descr[index].Present_Value[i];
break;
}
}
}
return value;
}
bool Multistate_Value_Present_Value_Set(
uint32_t object_instance,
uint32_t value,
uint8_t priority)
{
unsigned index = 0; /* offset from instance lookup */
index = Multistate_Value_Instance_To_Index(object_instance);
if (index >= MAX_MULTISTATE_VALUES)
return false;
if ((priority == 0) || (priority > BACNET_MAX_PRIORITY) ||
(priority == 6 /* reserved, ASHRAE 135-2016, section 19.2.2 */))
return false;
if ((value == 0) || (value > MSV_Descr[index].Number_Of_States))
return false;
priority--;
MSV_Descr[index].Present_Value[priority] = (uint8_t) value;
return true;
}
/* returns command priority (1..16), or 0 if all priority values are at NULL */
int Multistate_Value_Current_Command_Priority(
uint32_t object_instance)
{
unsigned index = 0;
unsigned i = 0;
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
for (i = 0; i < BACNET_MAX_PRIORITY; i++) {
if (!MSV_VALUE_IS_NULL(MSV_Descr[index].Present_Value[i])) {
return i+1; // +1 since priority is 1..16, and not 0..15
}
}
}
// command values in all priorities are set to NULL
return 0;
}
bool Multistate_Value_Present_Value_Relinquish(
uint32_t object_instance,
uint8_t priority)
{
unsigned index = 0; /* offset from instance lookup */
index = Multistate_Value_Instance_To_Index(object_instance);
if (index >= MAX_MULTISTATE_VALUES)
return false;
if ((priority == 0) || (priority > BACNET_MAX_PRIORITY) ||
(priority == 6 /* reserved, ASHRAE 135-2016, section 19.2.2 */))
return false;
priority--;
MSV_Descr[index].Present_Value[priority] = MSV_VALUE_NULL;
return true;
}
bool Multistate_Value_Out_Of_Service(
uint32_t object_instance)
{
bool value = false;
unsigned index = 0;
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
value = MSV_Descr[index].Out_Of_Service;
}
return value;
}
void Multistate_Value_Out_Of_Service_Set(
uint32_t object_instance,
bool value)
{
unsigned index = 0;
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
MSV_Descr[index].Out_Of_Service = value;
}
return;
}
static char *Multistate_Value_Description(
uint32_t object_instance)
{
unsigned index = 0; /* offset from instance lookup */
char *pName = NULL; /* return value */
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
pName = MSV_Descr[index].Description;
}
return pName;
}
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
bool Multistate_Value_Object_Name(
uint32_t object_instance,
BACNET_CHARACTER_STRING * object_name)
{
unsigned index = 0; /* offset from instance lookup */
bool status = false;
index = Multistate_Value_Instance_To_Index(object_instance);
if (index < MAX_MULTISTATE_VALUES) {
status = characterstring_init_ansi(object_name, MSV_Descr[index].Object_Name);
}
return status;
}
/* return apdu len, or BACNET_STATUS_ERROR on error */
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
int Multistate_Value_Read_Property(
BACNET_READ_PROPERTY_DATA * rpdata)
{
int len = 0;
int apdu_len = 0; /* return value */
BACNET_BIT_STRING bit_string;
BACNET_CHARACTER_STRING char_string;
uint32_t present_value = 0;
unsigned object_index = 0;
unsigned i = 0;
bool state = false;
uint8_t *apdu = NULL;
if ((rpdata == NULL) || (rpdata->application_data == NULL) ||
(rpdata->application_data_len == 0)) {
return 0;
}
object_index = Multistate_Value_Instance_To_Index(rpdata->object_instance);
if (object_index >= MAX_MULTISTATE_VALUES) {
rpdata->error_class = ERROR_CLASS_OBJECT;
rpdata->error_code = ERROR_CODE_UNKNOWN_OBJECT;
return BACNET_STATUS_ERROR;
}
apdu = rpdata->application_data;
switch (rpdata->object_property) {
case PROP_OBJECT_IDENTIFIER:
apdu_len =
encode_application_object_id(&apdu[0],
OBJECT_MULTI_STATE_VALUE, rpdata->object_instance);
break;
case PROP_OBJECT_NAME:
Multistate_Value_Object_Name(rpdata->object_instance,
&char_string);
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_DESCRIPTION:
characterstring_init_ansi(&char_string,
Multistate_Value_Description(rpdata->object_instance));
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_OBJECT_TYPE:
apdu_len =
encode_application_enumerated(&apdu[0],
OBJECT_MULTI_STATE_VALUE);
break;
case PROP_PRESENT_VALUE:
present_value =
Multistate_Value_Present_Value(rpdata->object_instance);
apdu_len = encode_application_unsigned(&apdu[0], present_value);
break;
case PROP_STATUS_FLAGS:
/* note: see the details in the standard on how to use these */
bitstring_init(&bit_string);
bitstring_set_bit(&bit_string, STATUS_FLAG_IN_ALARM, false);
bitstring_set_bit(&bit_string, STATUS_FLAG_FAULT, false);
bitstring_set_bit(&bit_string, STATUS_FLAG_OVERRIDDEN, false);
if (Multistate_Value_Out_Of_Service(rpdata->object_instance)) {
bitstring_set_bit(&bit_string, STATUS_FLAG_OUT_OF_SERVICE,
true);
} else {
bitstring_set_bit(&bit_string, STATUS_FLAG_OUT_OF_SERVICE,
false);
}
apdu_len = encode_application_bitstring(&apdu[0], &bit_string);
break;
case PROP_EVENT_STATE:
/* note: see the details in the standard on how to use this */
apdu_len =
encode_application_enumerated(&apdu[0], EVENT_STATE_NORMAL);
break;
case PROP_OUT_OF_SERVICE:
state = MSV_Descr[object_index].Out_Of_Service;
apdu_len = encode_application_boolean(&apdu[0], state);
break;
case PROP_PRIORITY_ARRAY:
BACnet_encode_array(MSV_Descr[object_index].Present_Value,
BACNET_MAX_PRIORITY,
MSV_VALUE_IS_NULL,
encode_application_unsigned);
break;
// case PROP_CURRENT_COMMAND_PRIORITY: {
// unsigned i = Multistate_Value_Current_Command_Priority(rpdata->object_instance);
// if (i == 0) apdu_len = encode_application_null (&apdu[0]);
// else apdu_len = encode_application_unsigned(&apdu[0], i);
// break;
// }
case PROP_RELINQUISH_DEFAULT:
present_value = MSV_VALUE_RELINQUISH_DEFAULT;
apdu_len = encode_application_unsigned(&apdu[0], present_value);
break;
case PROP_NUMBER_OF_STATES:
apdu_len =
encode_application_unsigned(&apdu[apdu_len],
MSV_Descr[object_index].Number_Of_States);
break;
case PROP_STATE_TEXT:
BACnet_encode_array(MSV_Descr[object_index].State_Text,
MSV_Descr[object_index].Number_Of_States,
retfalse, BACnet_encode_character_string);
break;
// case PROP_PROPERTY_LIST:
// BACnet_encode_array(Multistate_Value_Properties_List,
// property_list_count(Multistate_Value_Properties_List),
// retfalse, encode_application_enumerated);
// break;
default:
rpdata->error_class = ERROR_CLASS_PROPERTY;
rpdata->error_code = ERROR_CODE_UNKNOWN_PROPERTY;
apdu_len = BACNET_STATUS_ERROR;
break;
}
/* only array properties can have array options */
if ((apdu_len >= 0) && (rpdata->object_property != PROP_STATE_TEXT) &&
(rpdata->object_property != PROP_PRIORITY_ARRAY) &&
// (rpdata->object_property != PROP_PROPERTY_LIST) &&
(rpdata->array_index != BACNET_ARRAY_ALL)) {
rpdata->error_class = ERROR_CLASS_PROPERTY;
rpdata->error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
apdu_len = BACNET_STATUS_ERROR;
}
return apdu_len;
}
/* returns true if successful */
/* This is a callback function. Callback set in My_Object_Table[] array declared in device.c, */
bool Multistate_Value_Write_Property(
BACNET_WRITE_PROPERTY_DATA * wp_data)
{
bool status = false; /* return value */
int len = 0;
unsigned object_index = 0;
BACNET_APPLICATION_DATA_VALUE value;
/* decode the some of the request */
len =
bacapp_decode_application_data(wp_data->application_data,
wp_data->application_data_len, &value);
/* FIXME: len < application_data_len: more data? */
if (len < 0) {
/* error while decoding - a value larger than we can handle */
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
return false;
}
if ((wp_data->object_property != PROP_STATE_TEXT) &&
(wp_data->object_property != PROP_PRIORITY_ARRAY) &&
(wp_data->array_index != BACNET_ARRAY_ALL)) {
/* only array properties can have array options */
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
return false;
}
/* No need to check whether object_index is within bounds.
* Has already been checked before Multistate_Output_Write_Property() is called
*/
object_index = Multistate_Value_Instance_To_Index(wp_data->object_instance);
switch (wp_data->object_property) {
case PROP_PRESENT_VALUE:
status =
WPValidateArgType(&value, BACNET_APPLICATION_TAG_UNSIGNED_INT,
&wp_data->error_class, &wp_data->error_code);
if (status) {
status =
Multistate_Value_Present_Value_Set
(wp_data->object_instance, value.type.Unsigned_Int, wp_data->priority);
if (!status) {
if (wp_data->priority == 6) {
/* Command priority 6 is reserved for use by Minimum On/Off
algorithm and may not be used for other purposes in any
object. */
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
} else {
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
}
}
} else {
status =
WPValidateArgType(&value, BACNET_APPLICATION_TAG_NULL,
&wp_data->error_class, &wp_data->error_code);
if (status) {
status =
Multistate_Value_Present_Value_Relinquish
(wp_data->object_instance, wp_data->priority);
}
if (!status) {
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
}
break;
case PROP_OUT_OF_SERVICE:
{
bool Previous_Out_Of_Service = MSV_Descr[object_index].Out_Of_Service;
status =
WPValidateArgType(&value, BACNET_APPLICATION_TAG_BOOLEAN,
&wp_data->error_class, &wp_data->error_code);
if (status) {
MSV_Descr[object_index].Out_Of_Service = value.type.Boolean;
if (Previous_Out_Of_Service && !MSV_Descr[object_index].Out_Of_Service)
/* We have just changed from Out_of_Service -> In Service */
/* We need to update the Present_Value to the value
* currently in the PLC...
*/
MSV_Descr[object_index].Present_Value[BACNET_MAX_PRIORITY-1] =
*(MSV_Descr[object_index].Located_Var_ptr);
}
break;
}
case PROP_OBJECT_IDENTIFIER:
case PROP_OBJECT_NAME:
case PROP_OBJECT_TYPE:
case PROP_STATUS_FLAGS:
case PROP_EVENT_STATE:
case PROP_NUMBER_OF_STATES:
case PROP_PRIORITY_ARRAY:
// case PROP_CURRENT_COMMAND_PRIORITY:
case PROP_RELINQUISH_DEFAULT:
case PROP_DESCRIPTION:
case PROP_STATE_TEXT:
// case PROP_PROPERTY_LIST:
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
break;
default:
wp_data->error_class = ERROR_CLASS_PROPERTY;
wp_data->error_code = ERROR_CODE_UNKNOWN_PROPERTY;
break;
}
return status;
}
/********************************************/
/** Functions required for Beremiz plugin **/
/********************************************/
void Multistate_Value_Copy_Present_Value_to_Located_Var(void) {
unsigned i;
for (i = 0; i < MAX_MULTISTATE_VALUES; i++) {
// decouple PLC's Located Variable from Bacnet Object's Present Value if Out_Of_Service is true
if (MSV_Descr[i].Out_Of_Service)
continue;
// copy the value
*(MSV_Descr[i].Located_Var_ptr) = Multistate_Value_Present_Value(MSV_Descr[i].Object_Identifier);
}
}
void Multistate_Value_Copy_Located_Var_to_Present_Value(void) {
unsigned i;
for (i = 0; i < MAX_MULTISTATE_VALUES; i++) {
// decouple PLC's Located Variable from Bacnet Object's Present Value if Out_Of_Service is true
if (MSV_Descr[i].Out_Of_Service)
continue;
// copy the value
// Make sure local device does not set Present_Value to a value higher than Number_Of_States
/* NOTE: The following comparison (Present_Value > Number_Of_States) is OK as the
* MSV_VALUE_NULL is currently set to 0. This means that the local controller
* can safely relinquish control by setting the Present_Value to 0.
* The comparison would not be safe if for some reason we later change
* MSV_VALUE_NULL to a value that may be higher than Number_Of_States.
*/
#if MSV_VALUE_NULL != 0
#error Implementation assumes that MSV_VALUE_NULL is set to 0, which is currently not the case.
#endif
if (*(MSV_Descr[i].Located_Var_ptr) > MSV_Descr[i].Number_Of_States)
continue;
// Everything seems to be OK. Copy the value
MSV_Descr[i].Present_Value[BACNET_MAX_PRIORITY-1] = *(MSV_Descr[i].Located_Var_ptr);
}
}