Unitech PA960 Manuel d'utilisateur télécharger pdf (Page 28)

3 Control command for decoder chip (Hamser: 1D only)

Important: This chapter describes low level command for scanner control function. If you already USI

to do scanner programming, you don’t need to care about this chapter. In general, it is not suggested to

use level command to control scanner, because there are timing issue on serial communication

programming , and it is always need communication expert to do that and it is hard to explain it on

document.

When Host prepare to send a command to hamster, it must first check CTS, if CTS is high, then Host

must set the RTS to high then clear RTS to low to wake up the Hamster.

Special Command for control

command

Format

Comment

Control

Esc,80H+SOH(01H)

Let Hamster enter slaving status. At this

status Hamster just receives commands and

executes it until it receives Release command

or timeout (about 10s). Otherwise, the timeout

is about 1s as the interval of commands.

Release

Esc,80H+EOT(04H)

Let Hamster exit from slaving status.

Execute/

Enquiry

Esc,80H+ENQ(05H)

Let Hamster execute the previous saved command

and check hamster if there is a result of

previous executed command to send to Host. If

previous saved command have already executed

and no result to send, hamster do not reply

until there is a result. If Host receive a

result but the BCC is wrong, it can re-send

ENQ to re-send result again.

ACK

Esc,80H+ACK(06H)

It is from Hamster to Host. If Hamster receive

a command and this command do not need send

message back, Hamster reply the ACK.

NAK

Esc,80H+NAK(15H)

It is from Hamster to Host. Hamster require

the Host to re-send command again, normally

when received a wrong BCC, it can send the

NAK. The Hamster sends back NAK whenever it

receives a no sense command.

COMMAND FROM HOST TO HMASTER

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 97 98

Commentaires sur ces manuels

Pas de commentaire

Unitech PA960 Manuel d'utilisateur Page 28

Commentaires sur ces manuels

Produits connexes et manuels pour Téléphones mobiles Unitech PA960