HP Value Serial/USB Receipt Printer II User Manual download pdf (Page 112)

Chapter 3: Programming Commands112

Wheneachashdownloadcommandisreceived,theprinterreturnseitherACKorNAKtothehostcomputerwheneach

commandisreceived:

• ACK(hexadecimal06)

Sentwhentheprinterhasreceivedahosttransmissionandhascompletedtherequestsuccessfully.

• NAK(hexadecimal15)

Sentwhenarequestisunsuccessful.

Communicatestotheprinterinformationdownloadedfromapplications.Dataisdownloadedtoashmemorytoquerythe

stateofthermware,calculatethermwareCRCandotherfunctions.

Switch to ash download mode

ASCII ESC [ }

Hexadecimal 1B 5B 7D

Decimal 27 91 125

Putstheprinterinashdownloadmodeinpreparationtoreceivecommandscontrollingthedownloadingofobjectsinto

ashmemory.Whenthiscommandisreceived,theprinterleavesnormaloperationandcannolongerprinttransactions

untilthereboottheprintercommand(1DFF)isreceivedortheprinterisrebooted.

Thiscommanddoesnotaffectthecurrentcommunicationparameters.Oncetheprinterisinashdownloadmode,this

command is no longer available.

Related information

Seeenteringashdownloadmodeelsewhereinthisbooktoputtheprinterinashdownloadmodeusingtheconguration

menu.

Erase all ash contents except boot sector

ASCII GS SO

Hexadecimal 1D 0E

Decimal 29 14

Causestheentireashmemorytobeerased.

TheprinterreturnsACKifthecommandissuccessful;NAKifitisunsuccessful.

Exceptions

Availableonlyindownloadmode.

Return main program ash CRC

ASCII GS SI

Hexadecimal 1D 0F

Decimal 29 15

ReturnstheCRCcalculatedovertheashrmwarecodespace.

TheformatoftheresponseisACK<lowbyte><highbyte>.

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HP Value Serial/USB Receipt Printer II User Manual Page 112