Z-World eDisplay OP7200, Руководство пользователя

Страница: 54 / 152

48 eDisplay (OP7200)
4.4.4 Serial Communication
Library files included with Dynamic C provide a full range of serial communications sup-
port. The
RS232.LIB
library provides a set of circular-buffer-based serial functions. The
PACKET.LIB
library provides packet-based serial functions where packets can be delim-
ited by the 9th bit, by transmission gaps, or with user-defined special characters. Both
libraries provide blocking functions, which do not return until they are finished transmit-
ting or receiving, and nonblocking functions, which must be called repeatedly until they
are finished. For more information, see the Dynamic C Premier Function Reference
Manual and Technical Note 213, Rabbit 2000 Serial Port Software.
Use the following function calls with the OP7200.
User interface to set up OP7200 serial communication lines. Call this function after serXOpen() .
Whether you are opening one or multiple serial ports, this function must be executed after executing the last
serXOpen function AND before you start using any of the serial ports. This function is non-reentrant.
If Mode 1 is selected, CTS/RTS flow control is exercised using the serCflowcontrolOn and
serCflowcontrolOff functions from the RS232.LIB library.
PARAMETER
mode
is the defined serial port configuration.
RETURN VALUE
0 if valid mode, 1 if not.
SEE ALSO
ser485Tx, ser485Rx
int serMode(int mode);
Mode
Serial Port
B C D
0 RS-485 RS-232, 3-wire RS-232, 3-wire
1 RS-485 RS-232, 5-wire CTS/RTS