Symbol SE 923, Integration Manual

Page: 204 / 238

A-8
SE-923 Scan Engine Integration Guide
Sample Code for Host Receive Procedure
void host_receive()
IF (a character has been received) THEN
set up intercharacter time out
WHILE (not timed out AND not the last character) DO
IF (host can receive right now) THEN
deassert host RTS /* in case host was holding off decoder */
IF (a character was received) THEN
reset intercharacter time out
END
ELSE
IF (host wants to send to decoder) THEN
RETURN /* so host can transmit */
ELSE
request to send /* to hold off the decoder */
set up new intercharacter time-out
END
END
END
process received message and prepare response
RETURN
END
RETURN