Remote-processing RPC-2350 Manual de usuario Pagina 51
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KEYPAD PORT CHAPTER 9
9-2
The following example sets up CAMBASIC to scan a 16
position keypad. P orts A and B are set fo r outputs
(presumably to drive the LCD display and high current
port) The results are echo' ed to the display.
10 CONFIG PIO 1,0,0,1,0,64
20 'Optionally change keypad char 'B'
30 ' to the letter 'M'
40 POKE SYS(8)+7,77
60 ON KEYPAD$ 16 GOSUB 500
70 PRINT " Enter a number";
100 'loop for this example
110 GOTO 100
500 A$ = KEYPAD$(0)
510 IF A$ = "C" THEN ..clear_beep
520 IF A$ = CHR$(13) THEN ..enter
530 PRINT A$;
540 B$ = B$+A$
560 RETURN
600 ..clear_beep
610 B$=""
630 DELAY .4
650 PRINT CHR$(12); “ ” CAR$(12);
660 RETURN
700 ..enter
710 FL = 1
730 RETURN
Program Explanation
Lines 10-80 set up the parameters for the keypad.
Lines 500 to 730 process the key press. If a "C " or "#"
is pressed, it is an exception and is handled that way.
Otherwise, the character is displayed and stored.
Lines 700 to 730 process the "enter" key. The enter
flag, FL , is set to a 1 to indicate to another part of the
program that B$ has complete data.
The KEYPAD$(0) function returns a single character
string that has been assigned to a particular key.
Characters ar e assigned usin g the SYS(8 ) statemen t.
Keypad Commands
There are several keypad commands. See the table at
the end of this chapter.
KEYPAD PORT PI N OUT - J5
The keypad port uses port C from an 82C55. Lower
port C is configured as an input. Upper port C are
outputs.
The table below lists J5' s pin out, 82C55 port and bit,
and its intended function.
Pin 82C55
Port/bit @ U19
Function
1 C/0 Row 1
2 C/6 Column 3
3 C/5 Column 2
4 C/1 Row 2
5 C/2 Row 3
6 C/4 Column 1
7 C/7 Column 4
8 C/3 Row 4
9 B/0 Column 5
10 B/1 Column 6
Ground is not used.
COMMANDS
The following is a list of CAMBASIC commands for the
keypad.
Command Function
CONFIG PIO Configures digital I/O port
INPUT KEYPAD$ Input data from a keypad
KEYPA D$(n) Returns last key from keypad
port.
ON KEYPAD $ 16
ON KEYPAD $ 24
Causes a program branch
when a key is pressed
SYS(8) Returns keypad string address
to modify characters.
- RPC-2350 USER'S MANUAL 1
- TABLE OF CONTENTS 2
- CHAPTER 1 OVERVIEW 5
- OVERVIEW CHAPTER 1 6
- SETUP AND OPERATION CHAPTER 2 10
- CHAPTER 2 SETUP AND OPERATION 11
- CHAPTER SYNOPSIS 16
- DESCRIPTION 16
- SAVING A PROGRAM 16
- AUTORUNNING 17
- PREVENTING AUTORUN 17
- LOADING PROGRAMS 17
- SAVING DATA TO FLASH EPROM 18
- INSTALLING 128K OR 512K FLASH 18
- LINKING PROGRAMS 18
- COMMANDS 19
- CHAPTER 4 SERIAL PORTS 20
- SERIAL PORTS CHAPTER 4 21
- CHAPTER 5 DATA MEMORY 27
- DATA MEMORY CHAPTER 5 28
- CHAPTER 6 DIGITAL LINES 34
- DIGITAL LINES CHAPTER 6 35
- CALENDAR/CLOCK CHAPTER 7 41
- CHAPTER 7 CALENDAR/CLOCK 42
- CHAPTER 8 ANALOG I/O 43
- ANALOG I/O CHAPTER 8 44
- CHAPTER 9 KEYPAD PORT 50
- KEYPAD PORT CHAPTER 9 51
- CHAPTER 10 DISPLAY PORT 52
- DISPLAY PORTS CHAPTER 10 53
- CHAPTER 11 SOUND/TIMER OUTPUT 54
- CHAPTER 12 WATCHDOG TIMER 55
- CHAPTER 13 INTERRUPTS 56
- INTERRUPTS CHAPTER 13 57
- CHAPTER 14 MULTI-MODE COUNTER 58
- MULTI-MODE COUNTER CHAPTER 14 59
- DISPLAY INFORMATION 62
- CONNECTING A DISPLAY 63
- DISPLAY LAYERS 63
- CONTRAST ADJUSTMENT 64
- PRINTING TEXT 64
- CHANGING AND LOADING FONTS 66
- DRAWING POINTS AND LINES 66
- CLEAR, FILL, AND XOR AREAS 66
- LOAD AND SAVE SCREENS 67
- ADDITIONAL SCREEN CONTROLS 68
- PRINT AND DISPLAY TIMES 70
- EL DISPLAY 70
- CABLE PIN OUTS 71
- POWER INPUT 74
- POWER OUTPUT 75
- WARNING: 75
- EXPANSION PORT P1 75
- CHAPTER 17 RESOURCES 77
- RESOURCES CHAPTER 17 78
- TECHNICAL INFORMATION 79
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