Denso BHT-7000 3.3 Communications Protocols

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Chapter 3. Communications Operations of BHT-7000

3.3 Communications Protocols

The BHT-7000 supports both the BHT-protocol and the BHT-Ir protocol for file trans-

mission.

3.3.1 BHT-protocol

[ 1 ] Overview

The BHT-protocol is the communications procedure used to transmit files between the

BHT-7000 and a host (or between the BHT-7000s). It adopts the response method

using ACK/NAK codes.

The BHT-protocol is composed of a defined set of the control character sequences

including the following three phases:

Phase 1: Establishment of data link

The sending station confirms that the receiving station is ready to

receive data.

Phase 2: Data transmission

The sending station transmits data to the target receiving station.

Phase 3: Release of data link

The sending station confirms whether or not all of the transmitted

data has been correctly received by the receiving station. If yes, the

sending station terminates the data transmission and releases the

data link.

For details about the transmission control sequences and horizontal parity checking,

refer to Appendix B, B.1, "BHT-protocol."

Contents

Main Page Page How this book is organized Page SAFETY PRECAUTIONS Be sure to observe all these safety precautions. WARNING CAUTION Meaning of Symbols Handling the battery cartridge Handling the BHT Handling the CU Basic handling tips Handling the battery cartridge Handling the BHT Page Handling the CU Proper Care of the BHT and CU Limited Warranty on Software Products FCC Regulations Labeling Canadian Interference-Causing Equipment Regulations Content Overviews Page Page Chapter 1 Quick Guide 1.1 Reading Bar Codes Page 4 1.3 Setting the Backlight 1.4 Using the Keypad Entering Numerical Data Selecting Tasks Entering Alphabetic Characters 1.5 Communicating via the Optical In- terface Optical Communications with the BHT-7000 Communicating with the CU-7000 Communicating with other IrDA-compliant equipment 7 Chapter 2 Getting Started the BHT-7000 and System Mode 2.1 BHT-7000 System Configuration System Configuration Host Computer CU-7000 and RS-232C Interface Cable (option) BHT-BASIC Compiler (option) Ir-Transfer Utility C (option) Ir-Transfer Utility E (option) Transfer Utility (option) Software Structure System Programs Drivers BHT-BASIC Interpreter JIS Level 1 and Level 2 Font Files User Programs 2.2 Infrared Communications Page 2.3 Components and Functions 16 The functions of the keys may be set by user programs. Shown below is a set of sample functions. 32-key pad 26-key pad 2.4 Preparation 2.4.1 Setting-up 1: Loading the Battery Cartridge CAUTION WARNING Checking the Battery Voltage Level Low Battery Indication CAUTION 2.4.2 Setting-up 2: Setting the Calendar Clock Page [ 1 ] Adjusting the LCD Contrast & Beeper Volume and Switching the Beeper & Vibrator Adjusting the LCD contrast Switching the beeper & vibrator Adjusting the beeper volume [ 2 ] Checking the Battery Voltage Level Battery voltage level 2.4.4 Battery Replacement Notes When is battery replacement needed? If you will use the BHT-7000 more than one time per month: If you will not be using the BHT-7000 for more than one month: Page 2.5 Initializing the BHT-7000 System You may delete font files by selecting the whole user area to be initialized. Page Page Page 2.6 Operating in System Mode 2.6.1 Starting System Mode Structure of System Mode Page 36 37 2.6.2 Operating in System Mode Some functions in System Mode require several screens to be shifted, as shown in the example below. [ 1 ] Calling up the desired set screen 38 [ 2 ] Selecting a desired setting 2.6.3 Detailed Description of the Functions in System Mode [ 1 ] Program Execution [ 2 ] Downloading Download screens If an error occurs during downloading Page [ 3 ] Uploading Upload screens Page [ 4 ] System Environment Setting [4.2] Setting the message version [4.1] Setting an execution program [4.3] Setting the calendar clock [4.4] Setting the special bar-code scanning parameters Black-and-white inverted label reading function (INVERT) Page [4.5] Setting the communications environments for the optical inter- face for the direct-con- nect interface. [4.5-1] Setting the communications parameters for the optical interface serial number and horizontal parity settings will be ignored. [4.5-2] Setting the communications parameters for the direct-connect interface parity bit, character length, and stop bit length settings will be ignored. serial number and horizontal parity settings will be ignored. [4.5-3] Setting the interface port [4.5-4] Setting the communications protocol type [4.6] Defining the functions of the shift key and magic keys Magic keys [4.7] Setting the resume function [ 5 ] Testing If an error occurs in any of the above tests, contact your nearest dealer. [5.1] Bar-code reading test [5.2] Memory test [5.3] Beeper scale test [5.4] Aging test [5.5] LCD and indicator LED tests Page [5.6] File test [5.7] Communications test Preparation for the optical interface test Preparation for the direct-connect interface test Testing the optical interface port Testing the direct-connect interface port [5.8] Key entry & beeper test Page [ 6 ] System Information [ 7 ] Deleting Files [ 8 ] Downloading/Uploading the BHT System Parameter File [8.1] Downloading the BHT system parameter file If an error occurs during downloading [8.2] Uploading the BHT system parameter file Page [ 9 ] Setting the Remote Wakeup [ 10 ] Downloading/Uploading the System Message File [10.1] Downloading the system message file Page [10.2] Uploading the system message file Page Chapter 3 Communications Operations of BHT-7000 3.1 RS-232C Interface Specifications [ 1 ] Interface Connector and Pin Assignment 87 [ 2 ] Interface Cable Connection busy(RD) SD FG SG RD busy SG 3.2 Basic Communications Specifica- tions and Parameters 3.2.1 Basic Communications Specifications Synchronization Transmission Speed Optical Interface Communications Range Transmission Code and Bit Order Vertical Parity b0 b1 b2 b3 b4 b5 b6 LSB MSB LSB MSB b7 3.2.2 Communications Parameters 3.3 Communications Protocols 3.3.1 BHT-protocol [ 1 ] Overview Phase 1: Establishment of data link Phase 2: Data transmission [ 2 ] Control Characters (1) Transmission control characters Transparency (2) Text control characters [ 3 ] Basic Format of Transmission Messages 95 1234 0D0A00000 0 1172 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PROG1. PD3 00 523 [ 4 ] Text Format Program Text Format 1 2 3 4 5 6 7 8 9 101112131415161718192021 MASTER DAT 00592 n06 10 . T10091S123 9202141325 Data Text Format 3.3.2 BHT-Ir Protocol [ 1 ] Overview Phase 1: Establishment of data link Phase 2: Data transmission Phase 3: Release of data link [ 2 ] Control Characters (1) Transmission control characters Transparency (2) Text control characters 100 [ 3 ] Basic Format of Transmission Messages You can use the control characters for expressing IDs, serial numbers, or text data. 101 1234 0D0A00000 0 1172 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PROG1. PD3 00 523 [ 4 ] Text Format Program Text Format 1 2 3 4 5 6 7 8 9101112131415161718192021 MASTE R . DAT 00592 n 00 5462 T10091S123 9202141325 22 Data Text Format Page 4.1 System Errors Low battery indicationLevel 1 System Program error Low battery indicationLevel 2 Calendar clock stopped System Program malfunction Execution program not selected Resume data saving error Error in System Mode settings System down error System administrator to be called 4.2 Errors in System Mode When selecting a program file or data file Page Page During uploading of a program file, data file, BHT system parameter file, or sys- tem message file Page Chapter 5 Handling the CU-7000 (Option) 5.1 Functions of the CU-7000 5.2 Components and Functions 117 Chapter 5. Handling the CU-7000 (Option) 5.3 Applying Power to the CU-7000 5.4 Communicating with the Host Computer 5.4.1 Setting the Transmission Speed of the CU-7000 Do not set the DIP switch to any configurations other than one of the five shown above. 5.4.2 Interface Cable Connection 5.4.3 Interfacing with the Host Computer 5.5 Charging the Lithium-ion Battery Cartridge (using the CU-7001) Charging Operation and LED Indication 5.6 RS-232C Interface Specifications [ 1 ] Interface Connector and Pin Assignment [ 2 ] Interface Cable Connection DTE and DCE Page Appendices Appendix A. Specifications A.1 BHT-7000 [ 1 ] Product Specifications Page 128 (2) Optical Properties Required for Bar Code Labels [ 2 ] Bar Code Specifications (1) Available Bar Code Types 129 (3) Bar Code Label Size Recommended width: 10 mm min. (0.39 inch min.) Length: (4) Thickness of Bars and Depth of Field [ 3 ] Interface Specifications SD RD GND A.2 CU-7000 [ 1 ] Product Specifications [ 2 ] Charging Requirements (CU-7001) [ 3 ] Interface Specifications NOTE Shown below is a diagram of the internal connection in the CU-7000. Appendix B. Communications Protocol Details B.1 BHT-protocol [ 1 ] Transmission Control Sequences Page Page Phase 2: Data Transmission Normal phase 2 Phase 2 with NAK EOT Phase 2 with EOT Phase 2 with iterated ENQ transmission due to no response or invalid Abnormal termination of phase 2 (Abort of phase 2) Phase 3: Release of Data Link Normal phase 3 ACK Phase 3 with iterated EOT transmission due to no response or invalid Abnormal termination of phase 3 Page [ 3 ] BCC for Horizontal Parity Checking 143 B.2 BHT-Ir protocol [ 1 ] Transmission Control Sequences Phase 1: Establishment of Data Link Normal phase 1 Phase 1 with iterated transmission of DLE ENQ and IDm due to no re- sponse or invalid response Page Phase 2: Data Transmission Normal phase 2 Phase 2 with suspension of data reception for erasure of the flash memory Phase 2 with a sequence of DLE NAK and IDs Phase 2 with a sequence of DLE EOT and IDs Phase 2 with iterated transmission of DLE ENQ and IDs due to no response or invalid response Abnormal termination of phase 2 (Abort of phase 2) Phase 3: Release of Data Link Normal phase 3 Phase 3 with iterated transmission of DLE EOT and IDs due to no re- sponse or invalid response Abnormal termination of phase 3 Phase 3 with timeout at the receiving station [ 2 ] Aborting Data Transmission [ 3 ] CRC [ 4 ] ID Appendix C. A Typical Basic Operation Index Symbols A B C E F H I J N O P R S