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libmbus/mbus/mbus-protocol.h
Stefan Wahren 17a73287c2
Improve BCD decoding (#167) 
* Introduce mbus_data_bcd_decode_hex

The convert function mbus_data_bcd_decode (BCD to decimal) suffers from
information loss in case of hexacimal digits. So introduce a new function
mbus_data_bcd_decode_hex (BCD to hexadecimal), which isn't affected and
use this for default XML output. But keep mbus_data_bcd_decode for
normalized output.
2020-06-28 10:28:40 +02:00

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20 KiB
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//------------------------------------------------------------------------------
// Copyright (C) 2010-2011, Robert Johansson, Raditex AB
// All rights reserved.
//
// rSCADA
// http://www.rSCADA.se
// info@rscada.se
//
//------------------------------------------------------------------------------
/**
* @file mbus-protocol.h
*
* @brief Functions and data structures for M-Bus protocol parsing.
*
*/
#ifndef _MBUS_PROTOCOL_H_
#define _MBUS_PROTOCOL_H_
#include <stdlib.h>
#include <stdint.h>
#include <time.h>
#ifdef __cplusplus
extern "C" {
#endif
//
// Packet formats:
//
// ACK: size = 1 byte
//
// byte1: ack = 0xE5
//
// SHORT: size = 5 byte
//
// byte1: start = 0x10
// byte2: control = ...
// byte3: address = ...
// byte4: chksum = ...
// byte5: stop = 0x16
//
// CONTROL: size = 9 byte
//
// byte1: start1 = 0x68
// byte2: length1 = ...
// byte3: length2 = ...
// byte4: start2 = 0x68
// byte5: control = ...
// byte6: address = ...
// byte7: ctl.info= ...
// byte8: chksum = ...
// byte9: stop = 0x16
//
// LONG: size = N >= 9 byte
//
// byte1: start1 = 0x68
// byte2: length1 = ...
// byte3: length2 = ...
// byte4: start2 = 0x68
// byte5: control = ...
// byte6: address = ...
// byte7: ctl.info= ...
// byte8: data = ...
// ... = ...
// byteN-1: chksum = ...
// byteN: stop = 0x16
//
//
//
#define MBUS_FRAME_DATA_LENGTH 252
typedef struct _mbus_frame {
unsigned char start1;
unsigned char length1;
unsigned char length2;
unsigned char start2;
unsigned char control;
unsigned char address;
unsigned char control_information;
// variable data field
unsigned char checksum;
unsigned char stop;
unsigned char data[MBUS_FRAME_DATA_LENGTH];
size_t data_size;
int type;
time_t timestamp;
//mbus_frame_data frame_data;
void *next; // pointer to next mbus_frame for multi-telegram replies
} mbus_frame;
typedef struct _mbus_slave_data {
int state_fcb;
int state_acd;
} mbus_slave_data;
#define NITEMS(x) (sizeof(x)/sizeof(x[0]))
//
// Supported handle types
//
#define MBUS_HANDLE_TYPE_TCP 0
#define MBUS_HANDLE_TYPE_SERIAL 1
//
// Resultcodes for mbus_recv_frame
//
#define MBUS_RECV_RESULT_OK 0
#define MBUS_RECV_RESULT_ERROR -1
#define MBUS_RECV_RESULT_INVALID -2
#define MBUS_RECV_RESULT_TIMEOUT -3
#define MBUS_RECV_RESULT_RESET -4
//------------------------------------------------------------------------------
// MBUS FRAME DATA FORMATS
//
// DATA RECORDS
#define MBUS_DIB_DIF_WITHOUT_EXTENSION 0x7F
#define MBUS_DIB_DIF_EXTENSION_BIT 0x80
#define MBUS_DIB_VIF_WITHOUT_EXTENSION 0x7F
#define MBUS_DIB_VIF_EXTENSION_BIT 0x80
#define MBUS_DIB_DIF_MANUFACTURER_SPECIFIC 0x0F
#define MBUS_DIB_DIF_MORE_RECORDS_FOLLOW 0x1F
#define MBUS_DIB_DIF_IDLE_FILLER 0x2F
typedef struct _mbus_data_information_block {
unsigned char dif;
unsigned char dife[10];
size_t ndife;
} mbus_data_information_block;
typedef struct _mbus_value_information_block {
unsigned char vif;
unsigned char vife[10];
size_t nvife;
unsigned char custom_vif[128];
} mbus_value_information_block;
typedef struct _mbus_data_record_header {
mbus_data_information_block dib;
mbus_value_information_block vib;
} mbus_data_record_header;
typedef struct _mbus_data_record {
mbus_data_record_header drh;
unsigned char data[234];
size_t data_len;
time_t timestamp;
void *next;
} mbus_data_record;
//
// HEADER FOR VARIABLE LENGTH DATA FORMAT
//
typedef struct _mbus_data_variable_header {
//Ident.Nr. Manufr. Version Medium Access No. Status Signature
//4 Byte 2 Byte 1 Byte 1 Byte 1 Byte 1 Byte 2 Byte
// ex
// 88 63 80 09 82 4D 02 04 15 00 00 00
unsigned char id_bcd[4]; // 88 63 80 09
unsigned char manufacturer[2]; // 82 4D
unsigned char version; // 02
unsigned char medium; // 04
unsigned char access_no; // 15
unsigned char status; // 00
unsigned char signature[2]; // 00 00
} mbus_data_variable_header;
#define MBUS_DATA_VARIABLE_HEADER_LENGTH 12
//
// VARIABLE LENGTH DATA FORMAT
//
typedef struct _mbus_data_variable {
mbus_data_variable_header header;
mbus_data_record *record;
size_t nrecords;
unsigned char *data;
size_t data_len;
unsigned char more_records_follow;
// are these needed/used?
unsigned char mdh;
unsigned char *mfg_data;
size_t mfg_data_len;
} mbus_data_variable;
//
// FIXED LENGTH DATA FORMAT
//
typedef struct _mbus_data_fixed {
// ex
// 35 01 00 00 counter 2 = 135 l (historic value)
//
// e.g.
//
// 78 56 34 12 identification number = 12345678
// 0A transmission counter = 0Ah = 10d
// 00 status 00h: counters coded BCD, actual values, no errors
// E9 7E Type&Unit: medium water, unit1 = 1l, unit2 = 1l (same, but historic)
// 01 00 00 00 counter 1 = 1l (actual value)
// 35 01 00 00 counter 2 = 135 l (historic value)
unsigned char id_bcd[4];
unsigned char tx_cnt;
unsigned char status;
unsigned char cnt1_type;
unsigned char cnt2_type;
unsigned char cnt1_val[4];
unsigned char cnt2_val[4];
} mbus_data_fixed;
#define MBUS_DATA_FIXED_LENGTH 16
//
// ABSTRACT DATA FORMAT (error, fixed or variable length)
//
#define MBUS_DATA_TYPE_FIXED 1
#define MBUS_DATA_TYPE_VARIABLE 2
#define MBUS_DATA_TYPE_ERROR 3
typedef struct _mbus_frame_data {
mbus_data_variable data_var;
mbus_data_fixed data_fix;
int type;
int error;
} mbus_frame_data;
//
// HEADER FOR SECONDARY ADDRESSING
//
typedef struct _mbus_data_secondary_address {
//Ident.Nr. Manufr. Version Medium
//4 Byte 2 Byte 1 Byte 1 Byte
// ex
// 14 49 10 01 10 57 01 06
unsigned char id_bcd[4]; // 14 49 10 01
unsigned char manufacturer[2]; // 10 57
unsigned char version; // 01
unsigned char medium; // 06
} mbus_data_secondary_address;
//
// for compatibility with non-gcc compilers:
//
//#ifndef __PRETTY_FUNCTION__
//#define __PRETTY_FUNCTION__ "libmbus"
//#endif
//------------------------------------------------------------------------------
// FRAME types
//
#define MBUS_FRAME_TYPE_ANY 0x00
#define MBUS_FRAME_TYPE_ACK 0x01
#define MBUS_FRAME_TYPE_SHORT 0x02
#define MBUS_FRAME_TYPE_CONTROL 0x03
#define MBUS_FRAME_TYPE_LONG 0x04
#define MBUS_FRAME_ACK_BASE_SIZE 1
#define MBUS_FRAME_SHORT_BASE_SIZE 5
#define MBUS_FRAME_CONTROL_BASE_SIZE 9
#define MBUS_FRAME_LONG_BASE_SIZE 9
#define MBUS_FRAME_BASE_SIZE_ACK 1
#define MBUS_FRAME_BASE_SIZE_SHORT 5
#define MBUS_FRAME_BASE_SIZE_CONTROL 9
#define MBUS_FRAME_BASE_SIZE_LONG 9
#define MBUS_FRAME_FIXED_SIZE_ACK 1
#define MBUS_FRAME_FIXED_SIZE_SHORT 5
#define MBUS_FRAME_FIXED_SIZE_CONTROL 6
#define MBUS_FRAME_FIXED_SIZE_LONG 6
//
// Frame start/stop bits
//
#define MBUS_FRAME_ACK_START 0xE5
#define MBUS_FRAME_SHORT_START 0x10
#define MBUS_FRAME_CONTROL_START 0x68
#define MBUS_FRAME_LONG_START 0x68
#define MBUS_FRAME_STOP 0x16
//
//
//
#define MBUS_MAX_PRIMARY_SLAVES 250
//
// Control field
//
#define MBUS_CONTROL_FIELD_DIRECTION 0x07
#define MBUS_CONTROL_FIELD_FCB 0x06
#define MBUS_CONTROL_FIELD_ACD 0x06
#define MBUS_CONTROL_FIELD_FCV 0x05
#define MBUS_CONTROL_FIELD_DFC 0x05
#define MBUS_CONTROL_FIELD_F3 0x04
#define MBUS_CONTROL_FIELD_F2 0x03
#define MBUS_CONTROL_FIELD_F1 0x02
#define MBUS_CONTROL_FIELD_F0 0x01
#define MBUS_CONTROL_MASK_SND_NKE 0x40
#define MBUS_CONTROL_MASK_SND_UD 0x53
#define MBUS_CONTROL_MASK_REQ_UD2 0x5B
#define MBUS_CONTROL_MASK_REQ_UD1 0x5A
#define MBUS_CONTROL_MASK_RSP_UD 0x08
#define MBUS_CONTROL_MASK_FCB 0x20
#define MBUS_CONTROL_MASK_FCV 0x10
#define MBUS_CONTROL_MASK_ACD 0x20
#define MBUS_CONTROL_MASK_DFC 0x10
#define MBUS_CONTROL_MASK_DIR 0x40
#define MBUS_CONTROL_MASK_DIR_M2S 0x40
#define MBUS_CONTROL_MASK_DIR_S2M 0x00
//
// Address field
//
#define MBUS_ADDRESS_BROADCAST_REPLY 0xFE
#define MBUS_ADDRESS_BROADCAST_NOREPLY 0xFF
#define MBUS_ADDRESS_NETWORK_LAYER 0xFD
//
// Control Information field
//
//Mode 1 Mode 2 Application Definition in
// 51h 55h data send EN1434-3
// 52h 56h selection of slaves Usergroup July ́93
// 50h application reset Usergroup March ́94
// 54h synronize action suggestion
// B8h set baudrate to 300 baud Usergroup July ́93
// B9h set baudrate to 600 baud Usergroup July ́93
// BAh set baudrate to 1200 baud Usergroup July ́93
// BBh set baudrate to 2400 baud Usergroup July ́93
// BCh set baudrate to 4800 baud Usergroup July ́93
// BDh set baudrate to 9600 baud Usergroup July ́93
// BEh set baudrate to 19200 baud suggestion
// BFh set baudrate to 38400 baud suggestion
// B1h request readout of complete RAM content Techem suggestion
// B2h send user data (not standardized RAM write) Techem suggestion
// B3h initialize test calibration mode Usergroup July ́93
// B4h EEPROM read Techem suggestion
// B6h start software test Techem suggestion
// 90h to 97h codes used for hashing longer recommended
#define MBUS_CONTROL_INFO_DATA_SEND 0x51
#define MBUS_CONTROL_INFO_DATA_SEND_MSB 0x55
#define MBUS_CONTROL_INFO_SELECT_SLAVE 0x52
#define MBUS_CONTROL_INFO_SELECT_SLAVE_MSB 0x56
#define MBUS_CONTROL_INFO_APPLICATION_RESET 0x50
#define MBUS_CONTROL_INFO_SYNC_ACTION 0x54
#define MBUS_CONTROL_INFO_SET_BAUDRATE_300 0xB8
#define MBUS_CONTROL_INFO_SET_BAUDRATE_600 0xB9
#define MBUS_CONTROL_INFO_SET_BAUDRATE_1200 0xBA
#define MBUS_CONTROL_INFO_SET_BAUDRATE_2400 0xBB
#define MBUS_CONTROL_INFO_SET_BAUDRATE_4800 0xBC
#define MBUS_CONTROL_INFO_SET_BAUDRATE_9600 0xBD
#define MBUS_CONTROL_INFO_SET_BAUDRATE_19200 0xBE
#define MBUS_CONTROL_INFO_SET_BAUDRATE_38400 0xBF
#define MBUS_CONTROL_INFO_REQUEST_RAM_READ 0xB1
#define MBUS_CONTROL_INFO_SEND_USER_DATA 0xB2
#define MBUS_CONTROL_INFO_INIT_TEST_CALIB 0xB3
#define MBUS_CONTROL_INFO_EEPROM_READ 0xB4
#define MBUS_CONTROL_INFO_SW_TEST_START 0xB6
//Mode 1 Mode 2 Application Definition in
// 70h report of general application errors Usergroup March 94
// 71h report of alarm status Usergroup March 94
// 72h 76h variable data respond EN1434-3
// 73h 77h fixed data respond EN1434-3
#define MBUS_CONTROL_INFO_ERROR_GENERAL 0x70
#define MBUS_CONTROL_INFO_STATUS_ALARM 0x71
#define MBUS_CONTROL_INFO_RESP_FIXED 0x73
#define MBUS_CONTROL_INFO_RESP_FIXED_MSB 0x77
#define MBUS_CONTROL_INFO_RESP_VARIABLE 0x72
#define MBUS_CONTROL_INFO_RESP_VARIABLE_MSB 0x76
//
// DATA BITS
//
#define MBUS_DATA_FIXED_STATUS_FORMAT_MASK 0x80
#define MBUS_DATA_FIXED_STATUS_FORMAT_BCD 0x00
#define MBUS_DATA_FIXED_STATUS_FORMAT_INT 0x80
#define MBUS_DATA_FIXED_STATUS_DATE_MASK 0x40
#define MBUS_DATA_FIXED_STATUS_DATE_STORED 0x40
#define MBUS_DATA_FIXED_STATUS_DATE_CURRENT 0x00
//
// data record fields
//
#define MBUS_DATA_RECORD_DIF_MASK_INST 0x00
#define MBUS_DATA_RECORD_DIF_MASK_MIN 0x10
#define MBUS_DATA_RECORD_DIF_MASK_TYPE_INT32 0x04
#define MBUS_DATA_RECORD_DIF_MASK_DATA 0x0F
#define MBUS_DATA_RECORD_DIF_MASK_FUNCTION 0x30
#define MBUS_DATA_RECORD_DIF_MASK_STORAGE_NO 0x40
#define MBUS_DATA_RECORD_DIF_MASK_EXTENTION 0x80
#define MBUS_DATA_RECORD_DIF_MASK_NON_DATA 0xF0
#define MBUS_DATA_RECORD_DIFE_MASK_STORAGE_NO 0x0F
#define MBUS_DATA_RECORD_DIFE_MASK_TARIFF 0x30
#define MBUS_DATA_RECORD_DIFE_MASK_DEVICE 0x40
#define MBUS_DATA_RECORD_DIFE_MASK_EXTENSION 0x80
//
// GENERAL APPLICATION ERRORS
//
#define MBUS_ERROR_DATA_UNSPECIFIED 0x00
#define MBUS_ERROR_DATA_UNIMPLEMENTED_CI 0x01
#define MBUS_ERROR_DATA_BUFFER_TOO_LONG 0x02
#define MBUS_ERROR_DATA_TOO_MANY_RECORDS 0x03
#define MBUS_ERROR_DATA_PREMATURE_END 0x04
#define MBUS_ERROR_DATA_TOO_MANY_DIFES 0x05
#define MBUS_ERROR_DATA_TOO_MANY_VIFES 0x06
#define MBUS_ERROR_DATA_RESERVED 0x07
#define MBUS_ERROR_DATA_APPLICATION_BUSY 0x08
#define MBUS_ERROR_DATA_TOO_MANY_READOUTS 0x09
//
// FIXED DATA FLAGS
//
//
// VARIABLE DATA FLAGS
//
#define MBUS_VARIABLE_DATA_MEDIUM_OTHER 0x00
#define MBUS_VARIABLE_DATA_MEDIUM_OIL 0x01
#define MBUS_VARIABLE_DATA_MEDIUM_ELECTRICITY 0x02
#define MBUS_VARIABLE_DATA_MEDIUM_GAS 0x03
#define MBUS_VARIABLE_DATA_MEDIUM_HEAT_OUT 0x04
#define MBUS_VARIABLE_DATA_MEDIUM_STEAM 0x05
#define MBUS_VARIABLE_DATA_MEDIUM_HOT_WATER 0x06
#define MBUS_VARIABLE_DATA_MEDIUM_WATER 0x07
#define MBUS_VARIABLE_DATA_MEDIUM_HEAT_COST 0x08
#define MBUS_VARIABLE_DATA_MEDIUM_COMPR_AIR 0x09
#define MBUS_VARIABLE_DATA_MEDIUM_COOL_OUT 0x0A
#define MBUS_VARIABLE_DATA_MEDIUM_COOL_IN 0x0B
#define MBUS_VARIABLE_DATA_MEDIUM_HEAT_IN 0x0C
#define MBUS_VARIABLE_DATA_MEDIUM_HEAT_COOL 0x0D
#define MBUS_VARIABLE_DATA_MEDIUM_BUS 0x0E
#define MBUS_VARIABLE_DATA_MEDIUM_UNKNOWN 0x0F
#define MBUS_VARIABLE_DATA_MEDIUM_IRRIGATION 0x10
#define MBUS_VARIABLE_DATA_MEDIUM_WATER_LOGGER 0x11
#define MBUS_VARIABLE_DATA_MEDIUM_GAS_LOGGER 0x12
#define MBUS_VARIABLE_DATA_MEDIUM_GAS_CONV 0x13
#define MBUS_VARIABLE_DATA_MEDIUM_COLORIFIC 0x14
#define MBUS_VARIABLE_DATA_MEDIUM_BOIL_WATER 0x15
#define MBUS_VARIABLE_DATA_MEDIUM_COLD_WATER 0x16
#define MBUS_VARIABLE_DATA_MEDIUM_DUAL_WATER 0x17
#define MBUS_VARIABLE_DATA_MEDIUM_PRESSURE 0x18
#define MBUS_VARIABLE_DATA_MEDIUM_ADC 0x19
#define MBUS_VARIABLE_DATA_MEDIUM_SMOKE 0x1A
#define MBUS_VARIABLE_DATA_MEDIUM_ROOM_SENSOR 0x1B
#define MBUS_VARIABLE_DATA_MEDIUM_GAS_DETECTOR 0x1C
#define MBUS_VARIABLE_DATA_MEDIUM_BREAKER_E 0x20
#define MBUS_VARIABLE_DATA_MEDIUM_VALVE 0x21
#define MBUS_VARIABLE_DATA_MEDIUM_CUSTOMER_UNIT 0x25
#define MBUS_VARIABLE_DATA_MEDIUM_WASTE_WATER 0x28
#define MBUS_VARIABLE_DATA_MEDIUM_GARBAGE 0x29
#define MBUS_VARIABLE_DATA_MEDIUM_SERVICE_UNIT 0x30
#define MBUS_VARIABLE_DATA_MEDIUM_RC_SYSTEM 0x36
#define MBUS_VARIABLE_DATA_MEDIUM_RC_METER 0x37
//
// Returns the manufacturer ID or zero if the given
// string could not be converted into an ID
//
unsigned int mbus_manufacturer_id(char *manufacturer);
// Since libmbus writes some special characters (ASCII > 0x7F) into the XML output (e.g. <20>C for centigrade == ASCII 0xB0)
// it is useful to attach the appropriate code page for postprocessing.
#define MBUS_XML_PROCESSING_INSTRUCTION "<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>\n"
//
// Event callback functions
//
void mbus_dump_recv_event(unsigned char src_type, const char *buff, size_t len);
void mbus_dump_send_event(unsigned char src_type, const char *buff, size_t len);
//
// variable length records
//
mbus_data_record *mbus_data_record_new();
void mbus_data_record_free(mbus_data_record *record);
void mbus_data_record_append(mbus_data_variable *data, mbus_data_record *record);
// XXX: Add application reset subcodes
mbus_frame *mbus_frame_new(int frame_type);
int mbus_frame_free(mbus_frame *frame);
mbus_frame_data *mbus_frame_data_new();
void mbus_frame_data_free(mbus_frame_data *data);
//
//
//
int mbus_frame_calc_checksum(mbus_frame *frame);
int mbus_frame_calc_length (mbus_frame *frame);
//
// Parse/Pack to bin
//
int mbus_parse(mbus_frame *frame, unsigned char *data, size_t data_size);
int mbus_data_fixed_parse (mbus_frame *frame, mbus_data_fixed *data);
int mbus_data_variable_parse(mbus_frame *frame, mbus_data_variable *data);
int mbus_frame_data_parse (mbus_frame *frame, mbus_frame_data *data);
int mbus_frame_pack(mbus_frame *frame, unsigned char *data, size_t data_size);
int mbus_frame_verify(mbus_frame *frame);
int mbus_frame_internal_pack(mbus_frame *frame, mbus_frame_data *frame_data);
//
// data parsing
//
const char *mbus_data_record_function(mbus_data_record *record);
const char *mbus_data_fixed_function(int status);
long mbus_data_record_storage_number(mbus_data_record *record);
long mbus_data_record_tariff(mbus_data_record *record);
int mbus_data_record_device(mbus_data_record *record);
const char *mbus_data_record_unit(mbus_data_record *record);
const char *mbus_data_record_value(mbus_data_record *record);
//
// M-Bus frame data struct access/write functions
//
int mbus_frame_type(mbus_frame *frame);
int mbus_frame_direction(mbus_frame *frame);
//
// Slave status data register.
//
mbus_slave_data *mbus_slave_data_get(size_t i);
//
// XML generating functions
//
int mbus_str_xml_encode(unsigned char *dst, const unsigned char *src, size_t max_len);
char *mbus_data_xml(mbus_frame_data *data);
char *mbus_data_variable_xml(mbus_data_variable *data);
char *mbus_data_fixed_xml(mbus_data_fixed *data);
char *mbus_data_error_xml(int error);
char *mbus_frame_data_xml(mbus_frame_data *data);
char *mbus_data_variable_header_xml(mbus_data_variable_header *header);
char *mbus_frame_xml(mbus_frame *frame);
//
// Debug/dump
//
int mbus_frame_print(mbus_frame *frame);
int mbus_frame_data_print(mbus_frame_data *data);
int mbus_data_fixed_print(mbus_data_fixed *data);
int mbus_data_error_print(int error);
int mbus_data_variable_header_print(mbus_data_variable_header *header);
int mbus_data_variable_print(mbus_data_variable *data);
char *mbus_error_str();
void mbus_error_str_set(char *message);
void mbus_error_reset();
void mbus_parse_set_debug(int debug);
void mbus_hex_dump(const char *label, const char *buff, size_t len);
//
// data encode/decode functions
//
int mbus_data_manufacturer_encode(unsigned char *m_data, unsigned char *m_code);
const char *mbus_decode_manufacturer(unsigned char byte1, unsigned char byte2);
const char *mbus_data_product_name(mbus_data_variable_header *header);
int mbus_data_bcd_encode(unsigned char *bcd_data, size_t bcd_data_size, int value);
int mbus_data_int_encode(unsigned char *int_data, size_t int_data_size, int value);
long long mbus_data_bcd_decode(unsigned char *bcd_data, size_t bcd_data_size);
long long mbus_data_bcd_decode_hex(unsigned char *bcd_data, size_t bcd_data_size);
int mbus_data_int_decode(unsigned char *int_data, size_t int_data_size, int *value);
int mbus_data_long_decode(unsigned char *int_data, size_t int_data_size, long *value);
int mbus_data_long_long_decode(unsigned char *int_data, size_t int_data_size, long long *value);
float mbus_data_float_decode(unsigned char *float_data);
void mbus_data_tm_decode(struct tm *t, unsigned char *t_data, size_t t_data_size);
void mbus_data_str_decode(unsigned char *dst, const unsigned char *src, size_t len);
void mbus_data_bin_decode(unsigned char *dst, const unsigned char *src, size_t len, size_t max_len);
const char *mbus_data_fixed_medium(mbus_data_fixed *data);
const char *mbus_data_fixed_unit(int medium_unit_byte);
const char *mbus_data_variable_medium_lookup(unsigned char medium);
const char *mbus_unit_prefix(int exp);
const char *mbus_data_error_lookup(int error);
const char *mbus_vib_unit_lookup(mbus_value_information_block *vib);
const char *mbus_vif_unit_lookup(unsigned char vif);
unsigned char mbus_dif_datalength_lookup(unsigned char dif);
char *mbus_frame_get_secondary_address(mbus_frame *frame);
int mbus_frame_select_secondary_pack(mbus_frame *frame, char *address);
int mbus_is_primary_address(int value);
int mbus_is_secondary_address(const char * value);
#ifdef __cplusplus
}
#endif
#endif /* _MBUS_PROTOCOL_H_ */
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