Xon/Xoff | Star Micronics 150 guide

Programmer's Guide	PcOS Series 150	Communications
		Serial Port

Serial Port Flow Control

Communications

XON/XOFF

Printer

control

Serial

port

software

data in

Data

High

ENQ

Print

Data

speed

Data

Proc.

Data

Serial

Inquire

FIFO

buffer

commands

data out

Send

ENQ response

XOFF

Buffer filling up

256 - 6K

DTR

Send

Buffer emptying

XON

Select key

RTS

Send

(Not used for

XON or XOFF

flow control)

RTS -> Request to send

DTR -> Data terminal ready

Figure 21 Serial port flow control XON/XOFF

12/14/99

Rev G

Page 119

Image 129

Star Micronics 150 manual Xon/Xoff

Contents

Programmers Guide Page Programmer’s Guide PcOS Series Change History Disclaimer CopyrightDisclaimer PcOS Series Table of Contents Table of Contents PcOS Series Programmers Guide PcOS Series Table of Figures Table of Figures Page Warranty Information What is in this book?Chapter Overview of the Series 150 Printer Where can you find more information? Overview PcOS SeriesContacting Ithaca Peripherals Standard Features Chapter General DescriptionSeries 150 Models Model 152 Receipt/Journal Printer Model 151 Receipt PrinterModel 153 Receipt/Journal/Validation Printer Model 154 Receipt/Validation Printer Chapter General Specifications Printing SpecificationsProgrammers Guide PcOS Series 150 General Specifications Character Generation General Specifications General Specifications Electrical Characteristics Physical Specifications Interface Specifications Media SpecificationsRibbon Receipt Paper Receipt/Journal Paper Printable AreaReceipt Printing Validation Forms Printing Validation Left-side Insertion Validation Top Insertion Chapter Control Codes Overview NomenclatureControl Codes Overview PcOS Series Standard Emulation Programmers Guide PcOS Series 150 Control Codes OverviewIpcl Codes Epos Emulation Application Development Tables and ChartsNCR2567 Emulation Telpar Emulation Print/Paper Motion Chaper Printer Control CodesProgrammers Guide PcOS Series Control Codes Low-level Paper Motion Control Horizontal Motion Control Control Codes PcOS Series Horizontal Motion Increments Vertical Motion Control Control Codes Function Vertical tab Function Set form length in lines Character Font Function Begin 90 rotated font International Character Sets and Code Pages Language Country Code Epson Language SetAscii Function Select character code Character Code Function Character font image download IBM Euro Character Substitution Matrix NLQ HSD Character Print Control Examples of character print Character Pitch Pitch Spacing Character Pitch Performs an auto print Character Attribute Commands Character Attributes PcOS Series Control Codes Function Begin underline Ascii ESC F Function Select superscript Function End italics Number lines per inch Print Rotation Commands Rotated Print Function Begin 270 rotated print Function End rotated print Function Set rotated print line spacing Standard APA Graphics Graphic Mode Graphic Mode Function Begin unidirectional print Bar codes EAN-8 Function Bar code height Receipt Paper Out Sensor Validation Operation Validation Operation Control Function Set left/right print margin Miscellaneous Control Miscellaneous Control Function Print suppress and data pass through Function Enable Dynamic Response Printer Status Set/Inquire Parallel, Non-IEEE 1284 Mode Inquire Serial Mode Inquire Parallel, Ieee 1284 Mode InquireDynamic Response Mode Programmers Guide PcOS Series Control Codes Inquire Commands Function Inquire form position sensor status Function Request printer reset Function Inquire printer state Function Inquire all printer status Function Inquire printer ID ACK Extended Diagnostic Commands Command Comment Description Epos Command SummaryEpos Codes Real-time Status ESC Epos Codes Epos Deviations Command Descriptions Epos Deviations Function Enable/disable panel buttons Function Set bar code Command Description Microline Command SummaryMicroline Codes Bell Communication Echo Mode Serial interface only Command Description Control codes used in character setting Star Command SummaryStar Codes Control codes used in line spacing ESC a Control codes used for graphic printingControl codes used for peripheral units Other control codes NCR2567 Codes NCR Command SummaryDLE ETB Telpar Codes Telpar Command Summary Control Codes Summary by Code Normal Second Hex Code Ipcl equivalent DescriptionCode Field ESC 1BH,3CH ESC 1BH,3AH1BH,3DH ESC 1BH,3EH ESC 1BH,5DH ESC 1BH,5AHESC 1BH,5EH ESC 1BH,5FH 1BH,7EH Programmers Guide Control Codes Summary by FunctionCode Field Print/paper motion Vertical motion Custom characters International Character SetsCharacter pitch Character attributes Graphics Rotated print Bar codes Diagnostics4AH Validation control Indicators Push Buttons Momentary SwitchesGreen Red Indicator Chapter Operator Panel Controls Operator Panel Controls PcOS Series Fault Indicators Extended Diagnostics Level 0 DiagnosticsChapter Product Self-tests Self test Hex-dump Mode PcOS Series Chapter Hex-dump Mode Initial Power on Chapter Configuration ModeManual Configuration13 Enable Remote Configuration Configuration Mode PcOS Series Feature ConfigurationGeneral Recommendation Epos Microline Programmers Guide PcOS Series Configuration Mode Rev G 12/14/99 Character Vertical Control Configuration Mode PcOS Series USA Configuration Mode PcOS Series Programmers Guide XON/XOFF DTR/RTS Options General Control Configuration Mode PcOS Series Vertical Control CharacterInterface Save Changes Options Overview Chapter Communications Protocol and Print Buffers Overview Communications PcOS Series Programmers Guide PcOS Series Parallel Port Protocol Parallel Port Parallel Port Inquire Ieee Printer Buffer Size Communications PcOS Series Time-out PE to ENQ request timing Parallel Port Inquire Non-IEEE Parallel Port Plug and Play Signal Levels Parallel Port Connector Serial Port Features Serial PortSerial Port Pin-out Serial Port Protocol Serial Port Flow Control Using DTR XON/XOFF Serial buffer operation Print Buffer Flow Programmers Guide PcOS Series Print controller using data Printer Buffer Size Inquire flow Serial Port Inquire Power-cycle Recovery Remote Printer ResetReset in Serial Mode Reset in Parallel Mode Programmer’s Notes Chapter Cash Drawer Interface Interface ConnectorsInterface Description Function Drawer Chapter Printing Graphics Character GraphicsPrinting Graphics PcOS Series Printing Graphics Receipt with APA graphics APA Graphics 0100 Programmer’s Guide Programmers Guide PcOS Series 150Appendix a Appendix a Language TablesCode Country Code Decimal Hex Epson ID ECMA-94 Appendix a PcOS Series3H,0FAH 3H,0FCH Programmer’s Guide PcOS Series Appendix B Appendix B Ascii Code Chart Appendix C Ordering Cables General InformationAppendix C PcOS Series Programmers Guide PcOS Series Index Index Index PcOS Series APA graphic file 124 Ascii Chart 129 PcOS Series Insert PN Rev G 12/14/99