source: trunk/fw_g473rct/SES/src/modbus.c@ 24

Last change on this file since 24 was 24, checked in by f.jahn, 4 months ago

Shunt Temperatursensor aktiviert
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
186 HAL_UART_EnableReceiverTimeout( usart);
187 HAL_UART_ReceiverTimeout_Config(usart, 3.5 * nrOfBitsPerChar);
188 SET_BIT(usart->Instance->CR1, USART_CR1_RTOIE);
189
190
191 if(HAL_UART_Receive_DMA(mb_data->uart, mb_data->rx_buffer, RXBUFFERSIZE) != HAL_OK)
192 {
193 printf("uart error \n\r");
194 while(1)
195 {
196 }
197 }
198 }
199
200
201
202void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
203{
204 modbusData.mb_rx_frame_complete = 1;
205 modbusData.setRxLed = false;
206 modbusData.rx_head = huart->RxXferSize - __HAL_DMA_GET_COUNTER(huart->hdmarx);
207
208
209 if (huart->ErrorCode == HAL_UART_ERROR_RTO)
210 {
211
212 // printf("MB RTO Event! \n\r");
213 // Kein Fehler, normale Funktion
214 }
215 if (huart->ErrorCode == HAL_UART_ERROR_FE)
216 {
217 printf("MB FE Error! \n\r");
218 }
219
220 if (huart->ErrorCode == HAL_UART_ERROR_PE)
221 {
222 printf("MB PE Error! \n\r");
223 }
224
225 if (huart->ErrorCode == HAL_UART_ERROR_NE)
226 {
227 printf("MB NE Error! \n\r");
228 }
229
230 if (huart->ErrorCode == HAL_UART_ERROR_DMA)
231 {
232 printf("MB DMA Error! \n\r");
233 }
234
235 if (huart->ErrorCode == HAL_UART_ERROR_DMA)
236 {
237 printf("MB DMA Error! \n\r");
238 }
239
240 if (huart->ErrorCode == HAL_UART_ERROR_ORE)
241 {
242 printf("MB ORE Error! \n\r");
243 }
244
245
246
247 if(HAL_UART_Receive_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK)
248 {
249 printf("Uart Error bei neustart nach Fehler \n\r");
250 // while(1)
251 // {
252 // }
253 }
254
255}
256
257//void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
258//{
259// //printf("MB rxEvent!RX=%d \n\r",Size);
260// modbusData.setRxLed = true;
261
262// modbusData.mb_rx_frame_complete = 1;
263// modbusData.rx_head= Size +1;
264
265// if(HAL_UART_Receive_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK)
266// {
267// printf("uart error \n\r");
268// // while(1)
269// // {
270// // }
271// }
272
273
274//}
275
276void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
277{
278 //printf("uart complete \n\r");
279 modbusData.current_query = MB_QUERY_NOTHING;
280
281}
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303 void mbSend(modbus_t * mb_data )
304 {
305 mb_data->current_query = MB_QUERY_SEND_DATA;
306 HAL_UART_Transmit_DMA(mb_data->uart, mb_data->tx_buffer, mb_data->tx_head);
307 }
308
309 void mbClearTxBuffer(modbus_t * mb_data)
310 {
311 mb_data->tx_head = 0;
312 }
313
314
315
316 // Compute the MODBUS RTU CRC
317 uint16_t mbCrc16 ( uint8_t *buf, uint32_t len)
318 {
319 uint16_t crc = 0xFFFF;
320
321 for (uint32_t pos = 0; pos < len; pos++)
322 {
323 crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc
324
325 for (int i = 8; i != 0; i--)
326 { // Loop over each bit
327 if ((crc & 0x0001) != 0)
328 { // If the LSB is set
329 crc >>= 1; // Shift right and XOR 0xA001
330 crc ^= 0xA001;
331 }
332 else // Else LSB is not set
333 {
334 crc >>= 1; // Just shift right
335 }
336 }
337 }
338
339 // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes)
340 return crc;
341 }
342
343 /* If CRC is correct returns msg_length else returns INVALID_CRC */
344 int mbCheckCrc16( uint8_t *msg, const int msg_length)
345 {
346 int ret;
347 uint16_t crc_calc;
348 uint16_t crc_received;
349
350 crc_calc = mbCrc16(msg, msg_length - 2);
351 crc_received = (msg[msg_length - 1] << 8) | msg[msg_length - 2];
352
353 // Check CRC of msg
354 if (crc_calc == crc_received) {
355 ret = msg_length;
356 } else {
357 ret = INVALID_CRC;
358 }
359 return ret;
360 }
361
362 uint32_t mbAppendCrc16(uint8_t * buffer, uint32_t tx_position)
363 {
364 uint16_t crc = mbCrc16( buffer , tx_position);
365
366 uint8_t l_crc = (uint8_t) (crc & 0x00FF) ;
367 uint8_t h_crc = (uint8_t) (crc >> 8);
368 buffer[tx_position] = l_crc;
369 tx_position++;
370 buffer[tx_position] = h_crc;
371 tx_position++;
372 return tx_position;
373 }
374
375 /************************************************************************************************************
376 Function: mb_get_frame_complete
377 Purpose: Rckabe ob Frame komplett empfangen wurde
378 *************************************************************************************************************/
379 bool mbGetFrameComplete(modbus_t * mb_data)
380 {
381 return mb_data->mb_rx_frame_complete;
382 }
383
384 void mbClearRxFrame(modbus_t * mb_data)
385 {
386 // Wieder bei 0 im buffer anfangen
387 mb_data->rx_head = 0;
388
389 // keine Daten mehr vorhanden
390 mb_data->mb_rx_frame_complete=false;
391 }
392
393
394 // --------------------- SLAVE FUNCTIONS ---------------------------------------
395
396#define SEND_TO_SLAVES_BUFFER_COUNT 1000
397//static TASK_MODBUS_MASTER_Message_t xMessage[255];
398//static TASK_MODBUS_MASTER_Message_t *pxMessage;
399static bword_t values[SEND_TO_SLAVES_BUFFER_COUNT];
400static uint32_t y;
401static uint32_t z;
402
403 uint32_t mbSlaveCheckModbusRtuQuery(modbus_t * mb_data)
404 {
405 uint32_t message_lengh;
406 uint8_t *modbus_rx_message;
407 modbus_rx_message = mb_data->rx_buffer;
408 message_lengh= mb_data->rx_head;
409 uint32_t slave_adress;
410 slave_adress = modbus_rx_message[0];
411
412 if (message_lengh < 5) //Mindestens 5 Zeichen (Slave Adress + Function Code + 2x CRC
413 {
414 mbClearRxFrame(mb_data);
415 return 0;
416 }
417
418 // Prfe CRC
419 if (mbCheckCrc16(modbus_rx_message,message_lengh) == INVALID_CRC)
420 {
421 mbClearRxFrame(mb_data);
422 return 0;
423 }
424
425 if (slave_adress == MODBUS_BROADCAST_ADDRESS)
426 {
427
428 return RESPOND_TO_QUERY;
429 }
430 /* auf richtige Slave Adresse checken ansonsten nicht antworten*/
431 else if (slave_adress == sys_data.s.parameter.slave_address)
432 {
433 return RESPOND_TO_QUERY;
434 }
435
436 mbClearRxFrame(mb_data);
437 return 0;
438 }
439
440 void mbSlaveProcessRtuQuery(modbus_t * mb_data)
441 {
442 uint32_t tx_position=0; //die _Nchste_ Position in der Zeichen eingefgt werden mssen
443 uint8_t *modbus_rx_message;
444 modbus_rx_message = &mb_data->rx_buffer[0];
445
446 //Vorbereiten auf neues senden
447 mbClearTxBuffer(mb_data);
448
449 //mb_data->tx_buffer[0] = sys_data.s.vmGreenview.s.lb_slave_adress;
450 mb_data->tx_buffer[0] = *modbus_rx_message;
451 tx_position++;
452 tx_position = mbSlaveProcessPdu(mb_data->tx_buffer , modbus_rx_message,tx_position, *modbus_rx_message);
453
454 tx_position = mbAppendCrc16(mb_data->tx_buffer ,tx_position);
455 mb_data->tx_head=tx_position;
456 mbSend(mb_data);
457 mbClearRxFrame(mb_data);
458 }
459
460 uint32_t mbSlaveProcessPdu (uint8_t* response_string, uint8_t * msg, uint32_t tx_position, uint8_t deviceID)
461 {
462 uint32_t function_code;
463 uint32_t ret;
464
465 function_code = msg[OFFSET_FUNCTION_CODE];
466
467 switch (function_code)
468 {
469 case FC_READ_HOLDING_REGISTERS:
470 ret= mbSlaveReadHoldingRegisters(response_string, msg,tx_position, deviceID);
471 break;
472
473 case FC_WRITE_SINGLE_REGISTER:
474 ret = mbSlaveWriteSingleRegister(response_string, msg,tx_position, deviceID);
475 break;
476
477 case FC_WRITE_MULTIPLE_REGISTER:
478 ret=mbSlaveWriteMultipleRegisters(response_string, msg,tx_position, deviceID);
479 break;
480
481 default:
482 ret=mbSlaveResponseException(response_string,function_code,ILLEGAL_FUNCTION,tx_position);
483 break;
484 }
485
486 return ret;
487 }
488
489
490 uint32_t mbSlaveReadHoldingRegisters( uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint8_t deviceID)
491 {
492 uint32_t start_adress;
493 uint32_t adress;
494 uint32_t number_of_registers;
495
496 /*stimmt die device ID mit der eigenen berein*/
497 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
498 {
499 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
500 }
501
502 start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO];
503 number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO];
504
505 if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC3) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC3) )
506 {
507 return mbSlaveResponseException(response_string,FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_VALUE,tx_position);
508 }
509
510 if (start_adress+number_of_registers-1 > MAX_ADRESS)
511 {
512 return mbSlaveResponseException(response_string, FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_ADDRESS,tx_position);
513 }
514
515 response_string[tx_position] = FC_READ_HOLDING_REGISTERS; // FUNCTION CODE
516 tx_position++;
517 response_string[tx_position] = number_of_registers * 2; // Bytes
518 tx_position++;
519
520 for(adress=start_adress;adress < (start_adress + number_of_registers);adress++)
521 {
522 /*Daten aus dem Speicher senden*/
523 response_string[tx_position] = sys_data.mb[adress].b[1];
524 tx_position++;
525 response_string[tx_position] = sys_data.mb[adress].b[0];
526 tx_position++;
527 }
528
529 return tx_position;
530 }
531
532
533 uint32_t mbSlaveWriteMultipleRegisters(uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint32_t deviceID)
534 {
535
536 uint32_t start_adress;
537 uint32_t number_of_registers;
538 uint32_t adress;
539 uint32_t offset;
540
541 /*stimmt die device ID mit der eigenen berein*/
542 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
543 {
544 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
545 }
546
547 start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO];
548 number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO];
549 offset=7;
550
551 if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC16) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC16) )
552 {
553 return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_VALUE,tx_position);
554 }
555
556 if (start_adress+number_of_registers-1 > MAX_ADRESS)
557 {
558 return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position);
559 }
560
561 /*Daten in Gertespeicher schreiben*/
562 for(adress=start_adress;adress < (start_adress + number_of_registers);adress++)
563 {
564 sys_data.mb[adress].b[1] = msg[offset];
565 sys_data.mb[adress].b[0] = msg[offset+1];
566 offset+=2;
567 }
568
569 response_string[tx_position] = FC_WRITE_MULTIPLE_REGISTER; // FUNCTION CODE - 1 byte
570 tx_position++;
571 response_string[tx_position] = start_adress >> 8;
572 tx_position++;
573 response_string[tx_position] = (uint8_t ) ( start_adress & 0x00FF); // start adresse 2 byte
574 tx_position++;
575 response_string[tx_position] = number_of_registers >> 8;
576 tx_position++;
577 response_string[tx_position] = (uint8_t ) ( number_of_registers & 0x00FF); // Anzahl Register 2 byte
578 tx_position++;
579 return tx_position;
580 }
581
582
583 uint32_t mbSlaveWriteSingleRegister(uint8_t * response_string,uint8_t *msg,uint32_t tx_position, uint32_t deviceID)
584 {
585
586 uint32_t adress;
587
588 /*stimmt die device ID mit der eigenen berein*/
589 if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0))
590 {
591 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position);
592 }
593
594 adress = (msg[2] << 8) + msg[3];
595
596 if (adress > MAX_ADRESS)
597 {
598 return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position);
599 }
600
601 /*schreibe Daten in eigenen Speicher*/
602 sys_data.mb[adress].b[1] = msg[4];
603 sys_data.mb[adress].b[0] = msg[5];
604
605 response_string[tx_position]= FC_WRITE_SINGLE_REGISTER; // FUNCTION CODE
606 tx_position++;
607 response_string[tx_position]= adress >> 8;
608 tx_position++;
609 response_string[tx_position]= (uint8_t ) ( adress & 0x00FF);
610
611 tx_position++;
612 response_string[tx_position]= msg[4];
613 tx_position++;
614 response_string[tx_position]= msg[5];
615 tx_position++;
616
617 return tx_position;
618 }
619
620
621 uint32_t mbSlaveResponseException(uint8_t* response_string, uint32_t function_code, uint32_t exception_code,uint32_t tx_position )
622 {
623 function_code += 0x80;
624 response_string[tx_position] = function_code; // FUNCTION CODE
625 tx_position++;
626 response_string[tx_position] = exception_code; //
627 tx_position++;
628 return tx_position;
629 }
630
631
632 //---------------------------- UNKNOWN -----------------------------------------
633 //- -
634 //------------------------------------------------------------------------------
635
636#endif
637
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