Erase User Flash Sector, Reset Firmware | Epson A794-D100 guide

Chapter 6: Programming Information

A794 Owner’s Guide

Erase User Flash Sector

Erases a page of flash memory and sends a carriage return when the operation is complete.

ASCII	GS @ n
Hexadecimal	1D 40 n
Decimal	29 64 n
Value of n	49-50

n = 49 (ASCII n = 1)

This command erases the entire 64K page available for user-defined characters and multiple logos. The page should be erased in two situations: when the logo definition areas is full and an application is attempting to define new logos, and when an application wants to replace one user-defined character set with another. In both cases, all logos and character set definitions are erased and must be redefined.

Important While erasing flash memory, the printer disables all interrupts, including communications. To provide feedback to the application, the printer responds to the application when the erase is complete. After sending the Erase User Flash Sector (1D 40 n) command, an application should wait for the response from the printer before sending data. Otherwise, data will be lost. If an application is unable to receive data, it should wait a minimum of five seconds after sending the Erase User Flash Sector (1D 40 n) command before sending data.

Reset Firmware

Reboots the printer.

ASCII	GS (SPACE)
Hexadecimal	1D FF
Decimal	29 255

128	March 1999

Image 134

Epson A794-D100 manual Erase User Flash Sector, Reset Firmware

Contents

Owners Guide Page Legal Notices Disclaimer Power Supply Contents Communication Interface Programming Information Description of Printer Models Available InstallationsFeatures Options Description of Printer Communication Interfaces Models AvailableModel Identification Installations Setting up the printer Features On a Flat Surface Vertically see note Options Using the Printer Printer Controls Changing Paper Testing the Printer Paper Feed Button Reset ButtonPrinter Controls Tone Changing Paper A794 Owner’s Guide Paper jams Troubleshooting the Printer Testing the Printer Poorly printed test printout Troubleshooting the Printer Troubleshooting the Printer Printer Tone and Green LED Printing Problems Printer Does Not Work Ordering Thermal Paper Ordering Miscellaneous Supplies Ordering Thermal Paper Thermal Paper SpecificationsHow to Order Manufacturers Ordering Cash Drawers Ordering Power Supply and Power CordOrdering Miscellaneous Supplies Ordering Communication Cables Wall-Mount Kit Character Sets Paper Specifications Print ZonesCharacters Size CharactersPrint Modes Standard Print Zones for 80 mm Paper Paper SpecificationsPrint Zones Print Zones for 82.5 mm Paper Character Sets Code Code Code Code Code Code Code Code Communication Overview RS-232C Interface Using Basic to Send Commands Sending CommandsUsing DOS to Send Commands Communication Overview RS-232C Interface Print Speed and Timing XON/XOFF Protocol DTR/DSR Protocol Power Connector RS-232C Technical SpecificationsCommunication Connectors Pin DB-9 Connector Pin DB-25 Connector Cash Drawer Connector RS-232C Settings Ieee Bi-directional Parallel Connector Parallel Interface Communication Interface List of Commands Comparisons Command Descriptions Programming Information List of Commands Programming Information 26 s c1 c2 n1 d1...nn dn NL nH Comparisons 1D 2A n1 n2 d1...dn Command Descriptions Command Conventions Perform Full Knife Cut Printer Function CommandsClear Printer Hexadecimal Decimal Exceptions Hexadecimal Perform Partial Knife CutGenerate Tone Decimal Formulas Select Print Mode Value of n Initialize Printer Hexadecimal Decimal DefaultSelect Peripheral Device for Multi-Drop Range of n Select Paper Sensors to Output Paper End SignalsDefault of n Exceptions Enable or Disable Panel Button Select Sensors to Stop Printing Range of k Read from Non-Volatile MemoryGenerate Pulse to Open Cash Drawer Value of p1 Value of n1 Select Cut Mode and Cut PaperWrite to Non-Volatile Memory Nvram Value of n2 Activate Carriage Return Vertical Positioning and Print CommandsPrint and Feed One Line Feed n Print Lines Add n Extra Dot Rows Range of n DefaultFeed n Dot Rows Set Line Spacing to 1/6 Inch PrintSet Column Set Line Spacing Print and Feed Paper Print and Feed n Lines Set Right-Side Character Spacing Horizontal Positioning CommandsHorizontal Tab Set Absolute Starting Position Value of k Default Set Horizontal Tab Positions Set Relative Print Position Select Justification Compatibility Information A794 receipt vs. A793 receipt Range of nH Set Left MarginRange of nL Set Horizontal and Vertical Minimum Motion Units GS P x y Set Printing Area Width Select Single-Wide Characters Print Characteristics CommandsSelect Double-Wide Characters Hexadecimal Decimal Related Information Select 90 Degree Counter-Clockwise Rotated PrintSelect Pitch Column Width Select Character Set Define User-Defined Character Set Values and Ranges Select or Cancel Underline Mode ESC 0 0 Cancel User-Defined CharacterCopy Character Set from ROM to RAM Select or Cancel Emphasized Mode Select or Cancel Double Strike Select or Cancel Italic Print Select Character Code Table Select International Character Set Select or Cancel 90 Degree Clockwise Rotated PrintSelect or Cancel Upside-Down Print Mode Select Or Cancel White/Black Reverse Print Mode Select or Cancel Smoothing Mode Select Superscript or Subscript Modes Summary of Rotated Printing Download BMP Logo Graphics CommandsPrint Raster Graphics Hexadecimal Decimal Value = Number of dots to be moved from the beginning of the line Select Bit Image Mode Select Single-Density Graphics Select Double-Density Graphics Select the Current Logo Define Downloaded Bit Image Ranges Hexadecimal 1D 2F m Decimal Print Downloaded Bit ImageConvert 6 Dots/mm Bitmap to 8 Dots/mm Bitmap Value and Range of m Printer Status Commands Request Alternate Status parallel printers only Transmit Peripheral Device Status RS-232C printers only Transmit Paper Sensor Status Hexadecimal Decimal Values Transmit Printer ID Hexadecimal 1D 49 n Decimal Transmit Printer ID, Remote Diagnostics Extension Values of n Programming Information A794 Owner’s Guide Select or Cancel Automatic Status Back ASB Default ASB disabled Exceptions Undefined Off Not used. Fixed to off Transmit Status When n is out of the specified range, the command is ignored AX t Send Printer Software VersionPrint Test Form Real Time Commands Rules for Using Real Time Commands Busy Line and Fault Conditions Moving Data through the Buffer Recognizing Data from the Printer Real Time Request to Printer Real Time Status Transmission Related Information = Transmit Printer Status = Transmit Error Status = Transmit RS-232C Busy Status = Transmit Receipt Paper Status Real Time Printer Status Transmission Hexadecimal Decimal Value of Byte Select Pitch of HRI Characters Bar Code CommandsSelect Printing Position of HRI Characters Select Bar Code Height Print Bar Code UPC-A Default Formulas Select Bar Code Width Cancel Print Data in Page Mode Mode CommandsPrint and Return to Standard Mode Hexadecimal 0C Decimal Exceptions Hexadecimal 1B 0C Decimal Exceptions Print Data in Page ModeSelect Page Mode Hexadecimal 1B 4C Decimal Exceptions Select Standard Mode Ascii ESC S Select Print Direction in Page Mode Default Exceptions Set Print Area in Page Mode Select Character Size Set Absolute Vertical Print Position in Page Mode Set Relative Vertical Print Position in Page Mode Hexadecimal 1D 3A Decimal Formulas Macro CommandsSelect or Cancel Macro Definition Value of t Execute MacroValue of r Flash Download Commands Printer operation Return Segment Number Status of Flash Memory Switch to Flash Download ModeReturn Boot Sector Firmware Part Number ESC Get Firmware CRC Return Boot Sector CRCSelect Flash Memory Sector to Download Range of n Exceptions Erase Selected Flash Sector Erase All Flash Contents Except Boot SectorReturn Main Program Flash CRC Download to Active Flash Sector Ch * 256 + cl Ffff hexadecimal March 127 Reset Firmware Erase User Flash Sector Index Basic 130 March March 131 132 March