Kramer-electronics VP-790 Instrukcja Użytkownika Pobierz pdf (Strona 8)

4 VP-790 Protocol - Communication

1.5 UART Connector and UART Configuration

The board UART connector is PL9 or SK18.

PL9 Connector Type: 3-way 0.1” male, mating type 3-way 0.1” female

PL9 Pin SK18 Pin Signal name Function

1 3 RXDA232 RS232 levels, Rx (from the HOST)

2 2 TXDA232 RS232 levels, Tx (to the HOST)

3 5 DGND Ground

Connect the PC’s serial port to the Scaler RS-232 connector using a

9-pin serial extension cable, that is one wired pin-pin with a male connector on one

end and a female on the other. A null-modem or crossover cable should never be

used.

The board UART is configured to the following parameters: Baudrate: 9600; Stop

Bits: 1; Number of Bits in the Byte transmitted and received: 8; Parity: No Parity;

Flow Control: Off

1.6 TCP/IP Communication

The TCP/IP communication protocol is as the RS232 protocol but with all logical

headers omitted. Port 30000 is used. The foregoing brightness example is as

follows:

API Call:

54 50 01 00 00 00 00 00 00 00 00 10 00 00 00 00

50 46 00 68 00 00 00 00 00 00 00 04 7F FF FF FF

Handshake (from Scaler Board): No explicit handshake

API Return:

74 50 01 00 00 00 00 00 00 00 00 0D 00 00 00 00

70 46 00 68 00 00 00 00 00 00 00 01 00

Handshake (from PC): No explicit handshake

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 125 126

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Kramer-electronics VP-790 Instrukcja Użytkownika Strona 8