Remote Processing RPC-52 - Manual (Page 14)

SERIAL PORTS CHAPTER 4
Page 12
COMMANDS
The following is a list of RPBASIC-52 commands used
for serial I/O. Variations for many comm ands are not
listed here. These commands and functions are
explained in the BASIC-52 Programm ing Manual and
RPBASIC-52 Software Supplement in this manua l.
Comm and Function
C L E AR C O M $ Clears serial input buffer
C O M $
Returns string from buffer
COM Returns number of characters
in buffer
C O N F I G BA U D Sets serial port parameters
GET
Returns a character fr om the
serial buffer
I N P U T Receives string from port
LIST Outputs program listing
P R I N T Outputs data in various
form ats
SPC Print out n number of spaces
TAB Tabs to predetermined
positions
UI0 Reroute inputs to COM0
UI1 Route inputs to COM1
UO0 Rerou te PRIN T statem ent to
C O M 0
UO1 Route P RINT statement to
C O M 1
U S I N G PRINT formatting statement
SERIAL PORT PIN OUT
Pin outs for J2 and J3 are shown below. COM 0 (J3)
only has TXD and RX D active. U nused pins are open.
C O M 0 C O M 1 N a m e Direction
J3 J2 from card
3 3 Tx Out
4 RTS In
5 5 RXD In
6 * 6 CTS Out
9 9 Ground
10 10 + 5
* COM0 pin 6 has a 4.7K resistor to + 5V.