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bacnet-stack/ports/atmega168/device.c

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/**************************************************************************
*
* Copyright (C) 2007 Steve Karg <skarg@users.sourceforge.net>
*
* 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.
*
*********************************************************************/
#include <stdbool.h>
#include <stdint.h>
#include "bacdef.h"
#include "bacdcode.h"
#include "bacstr.h"
#include "bacenum.h"
#include "apdu.h"
#include "dcc.h"
#include "dlmstp.h"
#include "rs485.h"
#include "version.h"
#include "stack.h"
/* objects */
#include "device.h"
#include "av.h"
#include "bv.h"
#include "wp.h"
/* note: you really only need to define variables for
properties that are writable or that may change.
The properties that are constant can be hard coded
into the read-property encoding. */
static uint32_t Object_Instance_Number = 260001;
static char Object_Name[20] = "My Device";
static BACNET_DEVICE_STATUS System_Status = STATUS_OPERATIONAL;
void Device_Init(
void)
{
/* Reinitialize_State = BACNET_REINIT_IDLE; */
/* dcc_set_status_duration(COMMUNICATION_ENABLE, 0); */
/* FIXME: Get the data from the eeprom */
/* I2C_Read_Block(EEPROM_DEVICE_ADDRESS,
(char *)&Object_Instance_Number,
sizeof(Object_Instance_Number),
EEPROM_BACNET_ID_ADDR); */
}
/* methods to manipulate the data */
uint32_t Device_Object_Instance_Number(
void)
{
return Object_Instance_Number;
}
bool Device_Set_Object_Instance_Number(
uint32_t object_id)
{
bool status = true; /* return value */
if (object_id <= BACNET_MAX_INSTANCE) {
Object_Instance_Number = object_id;
/* FIXME: Write the data to the eeprom */
/* I2C_Write_Block(
EEPROM_DEVICE_ADDRESS,
(char *)&Object_Instance_Number,
sizeof(Object_Instance_Number),
EEPROM_BACNET_ID_ADDR); */
} else
status = false;
return status;
}
bool Device_Valid_Object_Instance_Number(
uint32_t object_id)
{
/* BACnet allows for a wildcard instance number */
return (Object_Instance_Number == object_id);
}
uint16_t Device_Vendor_Identifier(
void)
{
return BACNET_VENDOR_ID;
}
unsigned Device_Object_List_Count(
void)
{
unsigned count = 1; /* at least 1 for device object */
/* FIXME: add objects as needed */
count += Analog_Value_Count();
count += Binary_Value_Count();
return count;
}
bool Device_Object_List_Identifier(
uint32_t array_index,
int *object_type,
uint32_t * instance)
{
bool status = false;
uint32_t object_index = 0;
uint32_t object_count = 0;
/* device object */
if (array_index == 1) {
*object_type = OBJECT_DEVICE;
*instance = Object_Instance_Number;
status = true;
}
/* normalize the index since
we know it is not the previous objects */
/* array index starts at 1 */
object_index = array_index - 1;
/* 1 for the device object */
object_count = 1;
/* FIXME: add objects as needed */
/* analog value objects */
if (!status) {
/* array index starts at 1, and 1 for the device object */
object_index -= object_count;
object_count = Analog_Value_Count();
if (object_index < object_count) {
*object_type = OBJECT_ANALOG_VALUE;
*instance = Analog_Value_Index_To_Instance(object_index);
status = true;
}
}
/* binary value objects */
if (!status) {
object_index -= object_count;
object_count = Binary_Value_Count();
/* is it a valid index for this object? */
if (object_index < object_count) {
*object_type = OBJECT_BINARY_VALUE;
*instance = Binary_Value_Index_To_Instance(object_index);
status = true;
}
}
return status;
}
/* return the length of the apdu encoded or -1 for error */
int Device_Encode_Property_APDU(
uint8_t * apdu,
uint32_t object_instance,
BACNET_PROPERTY_ID property,
uint32_t array_index,
BACNET_ERROR_CLASS * error_class,
BACNET_ERROR_CODE * error_code)
{
int apdu_len = 0; /* return value */
int len = 0; /* apdu len intermediate value */
BACNET_BIT_STRING bit_string;
BACNET_CHARACTER_STRING char_string;
uint32_t i = 0;
int object_type = 0;
uint32_t instance = 0;
uint32_t count = 0;
object_instance = object_instance;
/* FIXME: change the hardcoded names to suit your application */
switch (property) {
case PROP_OBJECT_IDENTIFIER:
apdu_len =
encode_application_object_id(&apdu[0], OBJECT_DEVICE,
Object_Instance_Number);
break;
case PROP_OBJECT_NAME:
characterstring_init_ansi(&char_string, Object_Name);
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_OBJECT_TYPE:
apdu_len = encode_application_enumerated(&apdu[0], OBJECT_DEVICE);
break;
case PROP_SYSTEM_STATUS:
apdu_len = encode_application_enumerated(&apdu[0], System_Status);
break;
case PROP_VENDOR_NAME:
characterstring_init_ansi(&char_string, BACNET_VENDOR_NAME);
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_VENDOR_IDENTIFIER:
apdu_len =
encode_application_unsigned(&apdu[0],
Device_Vendor_Identifier());
break;
case PROP_MODEL_NAME:
characterstring_init_ansi(&char_string, "GNU Demo");
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_FIRMWARE_REVISION:
characterstring_init_ansi(&char_string, BACNET_VERSION_TEXT);
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_APPLICATION_SOFTWARE_VERSION:
characterstring_init_ansi(&char_string, "1.0");
apdu_len =
encode_application_character_string(&apdu[0], &char_string);
break;
case PROP_PROTOCOL_VERSION:
apdu_len =
encode_application_unsigned(&apdu[0], BACNET_PROTOCOL_VERSION);
break;
case PROP_PROTOCOL_REVISION:
apdu_len =
encode_application_unsigned(&apdu[0],
BACNET_PROTOCOL_REVISION);
break;
case PROP_PROTOCOL_SERVICES_SUPPORTED:
/* Note: list of services that are executed, not initiated. */
bitstring_init(&bit_string);
for (i = 0; i < MAX_BACNET_SERVICES_SUPPORTED; i++) {
/* automatic lookup based on handlers set */
bitstring_set_bit(&bit_string, (uint8_t) i,
apdu_service_supported((BACNET_SERVICES_SUPPORTED) i));
}
apdu_len = encode_application_bitstring(&apdu[0], &bit_string);
break;
case PROP_PROTOCOL_OBJECT_TYPES_SUPPORTED:
/* Note: this is the list of objects that can be in this device,
not a list of objects that this device can access */
bitstring_init(&bit_string);
/* must have the bit string as big as it can be */
for (i = 0; i < MAX_ASHRAE_OBJECT_TYPE; i++) {
/* initialize all the object types to not-supported */
bitstring_set_bit(&bit_string, (uint8_t) i, false);
}
/* FIXME: indicate the objects that YOU support */
bitstring_set_bit(&bit_string, OBJECT_DEVICE, true);
bitstring_set_bit(&bit_string, OBJECT_ANALOG_VALUE, true);
bitstring_set_bit(&bit_string, OBJECT_BINARY_VALUE, true);
apdu_len = encode_application_bitstring(&apdu[0], &bit_string);
break;
case PROP_OBJECT_LIST:
count = Device_Object_List_Count();
/* Array element zero is the number of objects in the list */
if (array_index == 0)
apdu_len = encode_application_unsigned(&apdu[0], count);
/* if no index was specified, then try to encode the entire list */
/* into one packet. Note that more than likely you will have */
/* to return an error if the number of encoded objects exceeds */
/* your maximum APDU size. */
else if (array_index == BACNET_ARRAY_ALL) {
for (i = 1; i <= count; i++) {
Device_Object_List_Identifier(i, &object_type, &instance);
len =
encode_application_object_id(&apdu[apdu_len],
object_type, instance);
apdu_len += len;
/* assume next one is the same size as this one */
/* can we all fit into the APDU? */
if ((apdu_len + len) >= MAX_APDU) {
/* Abort response */
*error_code =
ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
apdu_len = BACNET_STATUS_ABORT;
break;
}
}
} else {
if (Device_Object_List_Identifier(array_index, &object_type,
&instance))
apdu_len =
encode_application_object_id(&apdu[0], object_type,
instance);
else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_ARRAY_INDEX;
apdu_len = BACNET_STATUS_ERROR;
}
}
break;
case PROP_MAX_APDU_LENGTH_ACCEPTED:
apdu_len = encode_application_unsigned(&apdu[0], MAX_APDU);
break;
case PROP_SEGMENTATION_SUPPORTED:
apdu_len =
encode_application_enumerated(&apdu[0], SEGMENTATION_NONE);
break;
case PROP_APDU_TIMEOUT:
apdu_len = encode_application_unsigned(&apdu[0], 60000);
break;
case PROP_NUMBER_OF_APDU_RETRIES:
apdu_len = encode_application_unsigned(&apdu[0], 0);
break;
case PROP_DEVICE_ADDRESS_BINDING:
/* FIXME: encode the list here, if it exists */
break;
case PROP_DATABASE_REVISION:
apdu_len = encode_application_unsigned(&apdu[0], 0);
break;
case PROP_MAX_INFO_FRAMES:
apdu_len =
encode_application_unsigned(&apdu[0],
dlmstp_max_info_frames());
break;
case PROP_MAX_MASTER:
apdu_len =
encode_application_unsigned(&apdu[0], dlmstp_max_master());
break;
case 9600:
apdu_len =
encode_application_unsigned(&apdu[0], RS485_Get_Baud_Rate());
break;
case 512:
apdu_len = encode_application_unsigned(&apdu[0], stack_size());
break;
case 513:
apdu_len = encode_application_unsigned(&apdu[0], stack_unused());
break;
default:
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_UNKNOWN_PROPERTY;
apdu_len = -1;
break;
}
/* only array properties can have array options */
if ((apdu_len >= 0) && (property != PROP_OBJECT_LIST) &&
(array_index != BACNET_ARRAY_ALL)) {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
apdu_len = BACNET_STATUS_ERROR;
}
return apdu_len;
}
bool Device_Write_Property(
BACNET_WRITE_PROPERTY_DATA * wp_data,
BACNET_ERROR_CLASS * error_class,
BACNET_ERROR_CODE * error_code)
{
bool status = false; /* return value */
int len = 0;
BACNET_APPLICATION_DATA_VALUE value;
if (!Device_Valid_Object_Instance_Number(wp_data->object_instance)) {
*error_class = ERROR_CLASS_OBJECT;
*error_code = ERROR_CODE_UNKNOWN_OBJECT;
return false;
}
/* 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 */
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
return false;
}
if ((wp_data->object_property != PROP_OBJECT_LIST) &&
(wp_data->array_index != BACNET_ARRAY_ALL)) {
/* only array properties can have array options */
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_PROPERTY_IS_NOT_AN_ARRAY;
return false;
}
switch (wp_data->object_property) {
case PROP_OBJECT_IDENTIFIER:
if (value.tag == BACNET_APPLICATION_TAG_OBJECT_ID) {
if ((value.type.Object_Id.type == OBJECT_DEVICE) &&
(Device_Set_Object_Instance_Number(value.type.
Object_Id.instance))) {
/* we could send an I-Am broadcast to let the world know */
status = true;
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
break;
case PROP_MAX_INFO_FRAMES:
if (value.tag == BACNET_APPLICATION_TAG_UNSIGNED_INT) {
if (value.type.Unsigned_Int <= 255) {
dlmstp_set_max_info_frames(value.type.Unsigned_Int);
status = true;
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
break;
case PROP_MAX_MASTER:
if (value.tag == BACNET_APPLICATION_TAG_UNSIGNED_INT) {
if ((value.type.Unsigned_Int > 0) &&
(value.type.Unsigned_Int <= 127)) {
dlmstp_set_max_master(value.type.Unsigned_Int);
status = true;
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
break;
case PROP_OBJECT_NAME:
if (value.tag == BACNET_APPLICATION_TAG_CHARACTER_STRING) {
uint8_t encoding;
encoding =
characterstring_encoding(&value.type.Character_String);
if (encoding == CHARACTER_ANSI_X34) {
if (characterstring_ansi_copy(&Object_Name[0],
sizeof(Object_Name),
&value.type.Character_String)) {
status = true;
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_NO_SPACE_TO_WRITE_PROPERTY;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_CHARACTER_SET_NOT_SUPPORTED;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
break;
case 9600:
if (value.tag == BACNET_APPLICATION_TAG_UNSIGNED_INT) {
if (value.type.Unsigned_Int > 115200) {
RS485_Set_Baud_Rate(value.type.Unsigned_Int);
status = true;
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_VALUE_OUT_OF_RANGE;
}
} else {
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_INVALID_DATA_TYPE;
}
break;
case PROP_NUMBER_OF_APDU_RETRIES:
case PROP_APDU_TIMEOUT:
case PROP_VENDOR_IDENTIFIER:
case PROP_SYSTEM_STATUS:
case PROP_LOCATION:
case PROP_DESCRIPTION:
case PROP_MODEL_NAME:
case PROP_VENDOR_NAME:
case PROP_FIRMWARE_REVISION:
case PROP_APPLICATION_SOFTWARE_VERSION:
case PROP_LOCAL_TIME:
case PROP_UTC_OFFSET:
case PROP_LOCAL_DATE:
case PROP_DAYLIGHT_SAVINGS_STATUS:
case PROP_PROTOCOL_VERSION:
case PROP_PROTOCOL_REVISION:
case PROP_PROTOCOL_SERVICES_SUPPORTED:
case PROP_PROTOCOL_OBJECT_TYPES_SUPPORTED:
case PROP_OBJECT_LIST:
case PROP_MAX_APDU_LENGTH_ACCEPTED:
case PROP_SEGMENTATION_SUPPORTED:
case PROP_DEVICE_ADDRESS_BINDING:
case PROP_DATABASE_REVISION:
case PROP_ACTIVE_COV_SUBSCRIPTIONS:
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_WRITE_ACCESS_DENIED;
break;
default:
*error_class = ERROR_CLASS_PROPERTY;
*error_code = ERROR_CODE_UNKNOWN_PROPERTY;
break;
}
return status;
}
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