Remote Processing RPC-210 - Manual (Page 51)

DISPLAY & KEYPAD PORTS BASIC SECTION 11
Page 11-3
DISPLAY CONNECTOR PIN OUT
The display port uses port A of the 82C55 for data and
control. The table b elow lists a pin nu mber and its
intended function. A display may not use all lines even
though they are available. This is true for the E2 line.
J4 Pin Port A bit Function to display
1 2 Data 6
2 3 Data 7
3 0 Data 4
4 1 Data 5
5 N C No connect
6 N C No connect
7 N C No connect
8 N C No connect
9 5 Read/Write (0 = write)
10 6 Enable signal strobe 1
11 none Angle/c ontrast adjust
12 4 Register/data select
13 none + 5V power
14 none Ground
15 N C No connect
16 7 Enable signal strobe 2
LC d isplays oper ate in 4 bit data tr ansfer m ode. Data
lines 0 - 3 on the display are not used.
COMMANDS
The following RPBASIC-52 com mands are used for the
display and keypad.
Command Function
CLEAR DISPLAY Clears entire display
C L E A R D IS P L A Y LI N E Clears line of display
CONFIG DISPLAY Specifies display type
DISPLAY Prints string at
row/column specified
KEYPA D(n) Reads keypad character
or status.
ON KEYPAD Dire ct subrou tine line to
execute on key pr ess.
DEMONSTRATION PROGRAMS
The following programs may be used to verify proper
operation of a keypad or display. Programs are located
in the BASIC-52 directory.
P r og r am N a m e Description
KEYPAD1.BAS Read & process keypad
presses in polled mode.
KEYPAD2.BAS Process keypad presses
in interrupt mode.
DISP-1.BAS Display demo for 4 x 20
LC display. Prints tick
time.
DISP-2.BAS Display demo for 4 x 40
LC d isplay. Prints da te
and time.
DISP-3.BAS Demo for 4 x 40 LC
display. For mats and
prints analog inputs 0 and
1.