Kimaldi FingerVein Online, Инструкция по установке и программированию

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FingerVein Online
Installation and Programming Manual
www.kimaldi.com Page 17 of 69
7. Communication with RS-232 devices
FingerVein Online electronics has two RS-232 ports that can be used for different
purposes.
As explained in
Appendix A.2
, the UART1-DB maintains the possibility of connection to
the Host so that total compatibility between BioMax, FingerVein Online electronics and
FingerVein Online is ensured.
Therefore, the UART2-UI port is normally used to connect additional RS-232 devices.
To date, these devices will be of the following types:
7.1. RS-232 Reader
7.1.1. “Read-only” readers
A reader that transmits the user identification code through the serial port can normally
be connected to the UART2-UI. This would be, for example, a proximity reader,
magnetic band or bar code, etc. In these cases, the data received will be processed the
same as if it were to arrive via Clock&Data ports. This means that the green and red
LEDs can be used to provide information on the success or error of the reading process,
that multiread filtering can be applied and that in any case a
Card Reading
event will be
generated.
Subsection 8.1.4.
shows that the data is processed in the same way, whether it
is from a Clock&Data port or from a suitably configured UART ( CFG-UI_AuxSerial-
Port parameters to value
$40
or
$41
, see
Table 3
).
7.1.2. Autonomous readers
Nevertheless, more sophisticated readers do exist. These are those that can generate an
event with the identification code but that, at the same time, allow for two-way
communications with the Host to be programmed.
Within this type are the Kimaldi readers KRD13M and S42 , which have programmable
automatic modes capable of extracting a data sequence from a Mifare or SLE4442 card,
respectively. In this case, the host may issue instructions to manage reader configuration:
• The data frames are sent via the
Send to UART
instruction.
• The responses are received via the
Reception from UART
event.
• The events are received via
Card Reading
.
• The data format is binary, doing without
<STX>, <ETX>.
• Connection via UART2-UI is established after configuring the CFG-UI_AuxSerial-
Port parameter to the value
$40
or
$41
, according to the baud rate. The
maximum length of the frame is 48 bytes .