source: trunk/fw_g473rct/SES/src/modbus.c@ 23

Last change on this file since 23 was 23, checked in by f.jahn, 4 months ago

modbus via DMA still BETA, aber bautratenumschaltung implementiert
File size: 19.8 KB
Line 
1/*
2 * modbus.c
3 *
4 * Created: 03.09.2012 08:39:20
5 * Author: Falko
6 */
7
8
9
10#if MODBUS_SUPPORT == TRUE
11
12 #include "modbus.h"
13 //#include "stm32g4xx_hal.h"
14 #include "main.h"
15 //#include "stm32g0xx_hal_tim.h"
16 //#include "stm32_hal_legacy.h"
17 #include <stdio.h>
18 // ---------------------------------------------------------
19 // -------------------- MODUL DEFINES ----------------------
20 // ---------------------------------------------------------
21
22
23
24
25 #define MODBUS_BROADCAST_ADDRESS 0x00
26 #define FC_READ_COILS 0x01
27 #define FC_READ_HOLDING_REGISTERS 0x03
28 #define FC_WRITE_SINGLE_REGISTER 0x06
29 #define FC_WRITE_MULTIPLE_REGISTER 0x10
30
31 /* Protocol exceptions */
32 #define ILLEGAL_FUNCTION 0x01
33 #define ILLEGAL_DATA_ADDRESS 0x02
34 #define ILLEGAL_DATA_VALUE 0x03
35 #define SLAVE_DEVICE_FAILURE 0x04
36 #define SERVER_FAILURE 0x04
37 #define ACKNOWLEDGE 0x05
38 #define SLAVE_DEVICE_BUSY 0x06
39 #define SERVER_BUSY 0x06
40 #define NEGATIVE_ACKNOWLEDGE 0x07
41 #define MEMORY_PARITY_ERROR 0x08
42 #define GATEWAY_PROBLEM_PATH 0x0A
43 #define GATEWAY_PROBLEM_TARGET 0x0B
44
45 /* Local Error codes */
46 #define INVALID_CRC -1
47
48 // Position der Daten im Rx String
49 #define OFFSET_SLAVE_ADRESS 0x00
50 #define OFFSET_FUNCTION_CODE 0x01
51 #define OFFSET_START_ADRESS_HI 0x02
52 #define OFFSET_START_ADRESS_LO 0x03
53 #define OFFSET_NO_OF_REGISTERS_HI 0x04
54 #define OFFSET_NO_OF_REGISTERS_LO 0x05
55
56 #define MIN_NUMBER_OF_REGISTERS_FC3 0x01
57 #define MAX_NUMBER_OF_REGISTERS_FC3 0x7D
58 #define MIN_NUMBER_OF_REGISTERS_FC16 0x01
59 #define MAX_NUMBER_OF_REGISTERS_FC16 0x7B
60
61 #ifdef DEBUG
62 #define RESPONSE_TIMEOUT 300 // * 1ms
63 #else
64 #define RESPONSE_TIMEOUT 1000 // * 1ms
65 #endif
66
67 #define FAST_BAUDRATE_INTERFRAME_DELAY_us (1750UL)
68 // --- Externe Variablen --------------------------------------------
69 extern modbus_t modbusData;
70 extern sys_data_t sys_data;
71
72
73 // --- Private Funktions Prototypen --------------------------------------------
74
75 void mbUartInit (modbus_t * mb_data,UART_HandleTypeDef * usart, uint32_t baudrate, uint32_t parityMode, uint32_t stopBits , uint32_t nrOfBitsPerChar);
76 uint16_t mbCrc16 (uint8_t *buf, uint32_t len);
77 void mbSend (modbus_t * mb_data );
78 uint32_t mbSlaveReadHoldingRegisters (uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint8_t deviceID);
79 uint32_t mbSlaveWriteMultipleRegisters (uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint32_t deviceID);
80 uint32_t mbSlaveWriteSingleRegister (uint8_t * response_string,uint8_t *msg,uint32_t tx_position, uint32_t deviceID);
81 uint32_t mbSlaveResponseException (uint8_t* response_string, uint32_t function_code, uint32_t exception_code,uint32_t tx_position) ;
82static HAL_StatusTypeDef RS485_ModbusEx_Init (UART_HandleTypeDef *huart, uint32_t Polarity, uint32_t AssertionTime, uint32_t DeassertionTime, uint32_t charReceiveTimeout);
83static void UART_TxISR_8BIT (UART_HandleTypeDef *huart);
84
85 // --- GEMEINSAME MODBUS FUNKTIONEN --------------------------------------------
86 // Diese Funktionen werden sowohl von Modbus Master als auch Modbus Slave verwendet
87
88 /*
89 *
90 * @brief Diese Funktion Initialisert die Modbus Datenstrukturen und die Hardware
91 *
92 * Das Modbus Modul bentigt einen UART und einen Timer pro Modbus Anschluss
93 * Die Funktion erfordert eine vorhandene Callback funktion namens HAL_UART_MspInit
94 * In dieser muss:
95 * - Der UART CLK eingeschaltet werden
96 * - Die Pins initialisert werden (Alternate Port Funktion)
97 * - Der NVIC Interrupt eingeschaltet werden
98 * @param mb_data : Datenstruktur zur Aufnahme aller Daten
99 * @param baudrate : Bautrate
100 * @param parityMode : Parity, mglich ist UART_PARITY_ODD, UART_PARITY_EVEN, UART_PARITY_NONE. Default ist lt. Modbus Standart EVEN
101 * @param usart : Timer Modul, z.B. USART1
102 * @retval None
103 */
104 void mbInit(modbus_t* mb_data, uint32_t baudrate, uint32_t parityMode, uint16_t stopBits, UART_HandleTypeDef* usart)
105 {
106 uint32_t numberOfBitsPerChar;
107 //uint32_t stopBits;
108
109 if (stopBits < 1U || stopBits > 2U) stopBits = 1U;
110
111
112 // Berechne Anzahl der Bits per Char
113 numberOfBitsPerChar = NUMBER_OF_STARTBITS + NUMBER_OF_DATABITS + stopBits;
114 if ((parityMode == MODBUS_UART_PARITY_EVEN) || (parityMode == MODBUS_UART_PARITY_ODD))
115 {
116 numberOfBitsPerChar +=1;
117 }
118
119 mbUartInit(mb_data,usart, baudrate, parityMode, stopBits, numberOfBitsPerChar);
120
121 // Datenstrukturen zurcksetzen
122 mb_data->last_query_function_code = 0;
123 mb_data->last_query_tcp_id.w = 0;
124 mb_data->last_query_number_of_register.w = 0;
125 mb_data->current_query = MB_QUERY_NOTHING;
126 mb_data->last_query_slave_adress = 0;
127 mb_data->last_query_start_adress.w = 0;
128 mb_data->last_query_timeout = false;
129 }
130
131 /*
132 *
133 * @brief Diese Funktion Initialisert die Modbus UART Hardware
134 *
135 * @param mb_data : Datenstruktur zur Aufnahme aller Daten
136 * @param usart : UART Modul, z.B. USART1
137 * @param baudrate : UART BAUD
138 * @param parityMmode : Parity, mglich ist:
139 UART_PARITY_ODD, UART_PARITY_EVEN, UART_PARITY_NONE.
140 Default ist lt. Modbus Standart EVEN
141 * @param stopBits : Anzahl der Stop Bits, lt Modbus Standart
142 * 2 Stop Bits bei Parity None, ansonsten 2 Stop Bits
143 * @retval None
144 */
145 void mbUartInit(modbus_t * mb_data,UART_HandleTypeDef * usart, uint32_t baudrate, uint32_t parityMode, uint32_t stopBits , uint32_t nrOfBitsPerChar)
146 {
147 //--- Uart Init ------------------------------------------------------------
148 mb_data->uart = usart;
149
150 // Baudrate
151 mb_data->uart->Init.BaudRate = baudrate;
152
153 // Parity Mode // Word length
154 if(parityMode == MODBUS_UART_PARITY_EVEN)
155 {
156 mb_data->uart->Init.Parity = UART_PARITY_EVEN;
157 mb_data->uart->Init.WordLength = UART_WORDLENGTH_9B;
158 }
159 else if(parityMode == MODBUS_UART_PARITY_ODD)
160 {
161 mb_data->uart->Init.Parity = UART_PARITY_ODD;
162 mb_data->uart->Init.WordLength = UART_WORDLENGTH_9B;
163 }
164 else
165 {
166 mb_data->uart->Init.Parity = UART_PARITY_NONE;
167 mb_data->uart->Init.WordLength = UART_WORDLENGTH_8B;
168 }
169
170 // Stopbits
171 if (stopBits == 1)
172 {
173 mb_data->uart->Init.StopBits = UART_STOPBITS_1;
174 }
175 else
176 {
177 mb_data->uart->Init.StopBits = UART_STOPBITS_2;
178 }
179
180 if (HAL_UART_Init(mb_data->uart) != HAL_OK)
181 {
182 Error_Handler();
183 }
184
185 uint32_t fixedDelayInBitDurations = (FAST_BAUDRATE_INTERFRAME_DELAY_us * baudrate) / 1000000UL + 1UL;
186// HAL_UART_EnableReceiverTimeout( usart);
187// HAL_UART_ReceiverTimeout_Config(usart, fixedDelayInBitDurations);
188
189 if(HAL_UARTEx_ReceiveToIdle_DMA(mb_data->uart, mb_data->rx_buffer, RXBUFFERSIZE) != HAL_OK)
190 {
191 printf("uart error \n\r");
192 while(1)
193 {
194 }
195 }
196 }
197
198
199
200void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
201{
202 modbusData.mb_rx_frame_complete = 1;
203 modbusData.setRxLed = false;
204 modbusData.rx_head= 0;
205
206
207 if (huart->ErrorCode == HAL_UART_ERROR_RTO)
208 {
209 printf("MB RTO Event! \n\r");
210 }
211 if (huart->ErrorCode == HAL_UART_ERROR_FE)
212 {
213 printf("MB FE Error! \n\r");
214 }
215
216 if (huart->ErrorCode == HAL_UART_ERROR_PE)
217 {
218 printf("MB PE Error! \n\r");
219 }
220
221 if (huart->ErrorCode == HAL_UART_ERROR_NE)
222 {
223 printf("MB NE Error! \n\r");
224 }
225
226 if (huart->ErrorCode == HAL_UART_ERROR_DMA)
227 {
228 printf("MB DMA Error! \n\r");
229 }
230
231 if (huart->ErrorCode == HAL_UART_ERROR_DMA)
232 {
233 printf("MB DMA Error! \n\r");
234 }
235
236 if (huart->ErrorCode == HAL_UART_ERROR_ORE)
237 {
238 printf("MB ORE Error! \n\r");
239 }
240
241
242 if(HAL_UARTEx_ReceiveToIdle_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK)
243 {
244 printf("Uart Error bei neustart nach Fehler \n\r");
245 // while(1)
246 // {
247 // }
248 }
249
250}
251
252void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
253{
254 //printf("MB rxEvent!RX=%d \n\r",Size);
255 modbusData.setRxLed = true;
256
257 modbusData.mb_rx_frame_complete = 1;
258 modbusData.rx_head= Size +1;
259
260 if(HAL_UARTEx_ReceiveToIdle_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK)
261 {
262 printf("uart error \n\r");
263 // while(1)
264 // {
265 // }
266 }
267
268
269}
270
271void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
272{
273 //printf("uart complete \n\r");
274 modbusData.current_query = MB_QUERY_NOTHING;
275
276}
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298 void mbSend(modbus_t * mb_data )
299 {
300 mb_data->current_query = MB_QUERY_SEND_DATA;
301 HAL_UART_Transmit_DMA(mb_data->uart, mb_data->tx_buffer, mb_data->tx_head);
302 }
303
304 void mbClearTxBuffer(modbus_t * mb_data)
305 {
306 mb_data->tx_head = 0;
307 }
308
309
310
311 // Compute the MODBUS RTU CRC
312 uint16_t mbCrc16 ( uint8_t *buf, uint32_t len)
313 {
314 uint16_t crc = 0xFFFF;
315
316 for (uint32_t pos = 0; pos < len; pos++)
317 {
318 crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc
319
320 for (int i = 8; i != 0; i--)
321 { // Loop over each bit
322 if ((crc & 0x0001) != 0)
323 { // If the LSB is set
324 crc >>= 1; // Shift right and XOR 0xA001
325 crc ^= 0xA001;
326 }
327 else // Else LSB is not set
328 {
329 crc >>= 1; // Just shift right
330 }
331 }
332 }
333
334 // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes)
335 return crc;
336 }
337
338 /* If CRC is correct returns msg_length else returns INVALID_CRC */
339 int mbCheckCrc16( uint8_t *msg, const int msg_length)
340 {
341 int ret;
342 uint16_t crc_calc;
343 uint16_t crc_received;
344
345 crc_calc = mbCrc16(msg, msg_length - 2);
346 crc_received = (msg[msg_length - 1] << 8) | msg[msg_length - 2];
347
348 // Check CRC of msg
349 if (crc_calc == crc_received) {
350 ret = msg_length;
351 } else {
352 ret = INVALID_CRC;
353 }
354 return ret;
355 }
356
357 uint32_t mbAppendCrc16(uint8_t * buffer, uint32_t tx_position)
358 {
359 uint16_t crc = mbCrc16( buffer , tx_position);
360
361 uint8_t l_crc = (uint8_t) (crc & 0x00FF) ;
362 uint8_t h_crc = (uint8_t) (crc >> 8);
363 buffer[tx_position] = l_crc;
364 tx_position++;
365 buffer[tx_position] = h_crc;
366 tx_position++;
367 return tx_position;
368 }
369
370 /************************************************************************************************************
371 Function: mb_get_frame_complete
372 Purpose: Rckabe ob Frame komplett empfangen wurde
373 *************************************************************************************************************/
374 bool mbGetFrameComplete(modbus_t * mb_data)
375 {
376 return mb_data->mb_rx_frame_complete;
377 }
378
379 void mbClearRxFrame(modbus_t * mb_data)
380 {
381 // Wieder bei 0 im buffer anfangen
382 mb_data->rx_head = 0;
383
384 // keine Daten mehr vorhanden
385 mb_data->mb_rx_frame_complete=false;
386 }
387
388
389 // --------------------- SLAVE FUNCTIONS ---------------------------------------
390
391#define SEND_TO_SLAVES_BUFFER_COUNT 1000
392//static TASK_MODBUS_MASTER_Message_t xMessage[255];
393//static TASK_MODBUS_MASTER_Message_t *pxMessage;
394static bword_t values[SEND_TO_SLAVES_BUFFER_COUNT];
395static uint32_t y;
396static uint32_t z;
397
398 uint32_t mbSlaveCheckModbusRtuQuery(modbus_t * mb_data)
399 {
400 uint32_t message_lengh;
401 uint8_t *modbus_rx_message;
402 modbus_rx_message = mb_data->rx_buffer;
403 message_lengh= mb_data->rx_head;
404 uint32_t slave_adress;
405 slave_adress = modbus_rx_message[0];
406
407 if (message_lengh < 5) //Mindestens 5 Zeichen (Slave Adress + Function Code + 2x CRC
408 {
409 mbClearRxFrame(mb_data);
410 return 0;
411 }
412
413 // Prfe CRC
414 if (mbCheckCrc16(modbus_rx_message,message_lengh) == INVALID_CRC)
415 {
416 mbClearRxFrame(mb_data);
417 return 0;
418 }
419
420 if (slave_adress == MODBUS_BROADCAST_ADDRESS)
421 {
422
423 return RESPOND_TO_QUERY;
424 }
425 /* auf richtige Slave Adresse checken ansonsten nicht antworten*/
426 else if (slave_adress == sys_data.s.parameter.slave_address)
427 {
428 return RESPOND_TO_QUERY;
429 }
430
431 mbClearRxFrame(mb_data);
432 return 0;
433 }
434
435 void mbSlaveProcessRtuQuery(modbus_t * mb_data)
436 {
437 uint32_t tx_position=0; //die _Nchste_ Position in der Zeichen eingefgt werden mssen
438 uint8_t *modbus_rx_message;
439 modbus_rx_message = &mb_data->rx_buffer[0];
440
441 //Vorbereiten auf neues senden
442 mbClearTxBuffer(mb_data);
443
444 //mb_data->tx_buffer[0] = sys_data.s.vmGreenview.s.lb_slave_adress;
445 mb_data->tx_buffer[0] = *modbus_rx_message;
446 tx_position++;
447 tx_position = mbSlaveProcessPdu(mb_data->tx_buffer , modbus_rx_message,tx_position, *modbus_rx_message);
448
449 tx_position = mbAppendCrc16(mb_data->tx_buffer ,tx_position);
450 mb_data->tx_head=tx_position;
451 mbSend(mb_data);
452 mbClearRxFrame(mb_data);
453 }
454
455 uint32_t mbSlaveProcessPdu (uint8_t* response_string, uint8_t * msg, uint32_t tx_position, uint8_t deviceID)
456 {
457 uint32_t function_code;
458 uint32_t ret;
459
460 function_code = msg[OFFSET_FUNCTION_CODE];
461
462 switch (function_code)
463 {
464 case FC_READ_HOLDING_REGISTERS:
465 ret= mbSlaveReadHoldingRegisters(response_string, msg,tx_position, deviceID);
466 break;
467
468 case FC_WRITE_SINGLE_REGISTER:
469 ret = mbSlaveWriteSingleRegister(response_string, msg,tx_position, deviceID);
470 break;
471
472 case FC_WRITE_MULTIPLE_REGISTER:
473 ret=mbSlaveWriteMultipleRegisters(response_string, msg,tx_position, deviceID);
474 break;
475
476 default:
477 ret=mbSlaveResponseException(response_string,function_code,ILLEGAL_FUNCTION,tx_position);
478 break;
479 }
480
481 return ret;
482 }
483
484
485 uint32_t mbSlaveReadHoldingRegisters( uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint8_t deviceID)
486 {
487 uint32_t start_adress;
488 uint32_t adress;
489 uint32_t number_of_registers;
490
491 /*stimmt die device ID mit der eigenen berein*/
492 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
493 {
494 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
495 }
496
497 start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO];
498 number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO];
499
500 if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC3) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC3) )
501 {
502 return mbSlaveResponseException(response_string,FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_VALUE,tx_position);
503 }
504
505 if (start_adress+number_of_registers-1 > MAX_ADRESS)
506 {
507 return mbSlaveResponseException(response_string, FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_ADDRESS,tx_position);
508 }
509
510 response_string[tx_position] = FC_READ_HOLDING_REGISTERS; // FUNCTION CODE
511 tx_position++;
512 response_string[tx_position] = number_of_registers * 2; // Bytes
513 tx_position++;
514
515 for(adress=start_adress;adress < (start_adress + number_of_registers);adress++)
516 {
517 /*Daten aus dem Speicher senden*/
518 response_string[tx_position] = sys_data.mb[adress].b[1];
519 tx_position++;
520 response_string[tx_position] = sys_data.mb[adress].b[0];
521 tx_position++;
522 }
523
524 return tx_position;
525 }
526
527
528 uint32_t mbSlaveWriteMultipleRegisters(uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint32_t deviceID)
529 {
530
531 uint32_t start_adress;
532 uint32_t number_of_registers;
533 uint32_t adress;
534 uint32_t offset;
535
536 /*stimmt die device ID mit der eigenen berein*/
537 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
538 {
539 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
540 }
541
542 start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO];
543 number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO];
544 offset=7;
545
546 if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC16) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC16) )
547 {
548 return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_VALUE,tx_position);
549 }
550
551 if (start_adress+number_of_registers-1 > MAX_ADRESS)
552 {
553 return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position);
554 }
555
556 /*Daten in Gertespeicher schreiben*/
557 for(adress=start_adress;adress < (start_adress + number_of_registers);adress++)
558 {
559 sys_data.mb[adress].b[1] = msg[offset];
560 sys_data.mb[adress].b[0] = msg[offset+1];
561 offset+=2;
562 }
563
564 response_string[tx_position] = FC_WRITE_MULTIPLE_REGISTER; // FUNCTION CODE - 1 byte
565 tx_position++;
566 response_string[tx_position] = start_adress >> 8;
567 tx_position++;
568 response_string[tx_position] = (uint8_t ) ( start_adress & 0x00FF); // start adresse 2 byte
569 tx_position++;
570 response_string[tx_position] = number_of_registers >> 8;
571 tx_position++;
572 response_string[tx_position] = (uint8_t ) ( number_of_registers & 0x00FF); // Anzahl Register 2 byte
573 tx_position++;
574 return tx_position;
575 }
576
577
578 uint32_t mbSlaveWriteSingleRegister(uint8_t * response_string,uint8_t *msg,uint32_t tx_position, uint32_t deviceID)
579 {
580
581 uint32_t adress;
582
583 /*stimmt die device ID mit der eigenen berein*/
584 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
585 {
586 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
587 }
588
589 adress = (msg[2] << 8) + msg[3];
590
591 if (adress > MAX_ADRESS)
592 {
593 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position);
594 }
595
596 /*schreibe Daten in eigenen Speicher*/
597 sys_data.mb[adress].b[1] = msg[4];
598 sys_data.mb[adress].b[0] = msg[5];
599
600 response_string[tx_position]= FC_WRITE_SINGLE_REGISTER; // FUNCTION CODE
601 tx_position++;
602 response_string[tx_position]= adress >> 8;
603 tx_position++;
604 response_string[tx_position]= (uint8_t ) ( adress & 0x00FF);
605
606 tx_position++;
607 response_string[tx_position]= msg[4];
608 tx_position++;
609 response_string[tx_position]= msg[5];
610 tx_position++;
611
612 return tx_position;
613 }
614
615
616 uint32_t mbSlaveResponseException(uint8_t* response_string, uint32_t function_code, uint32_t exception_code,uint32_t tx_position )
617 {
618 function_code += 0x80;
619 response_string[tx_position] = function_code; // FUNCTION CODE
620 tx_position++;
621 response_string[tx_position] = exception_code; //
622 tx_position++;
623 return tx_position;
624 }
625
626
627 //---------------------------- UNKNOWN -----------------------------------------
628 //- -
629 //------------------------------------------------------------------------------
630
631#endif
632
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