Argox PA-20 Basic Programming Manual Manual do Utilizador Página 90
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READ_COM$
Purpose：
To read data from a specified COM port.
Syntax：
A$ = READ_COM$(N%)
Example：
ON COM(1) GOSUB READ1
CLS
PRINT "==COM TEST=="
LOCATE 0,1
PRINT "ENT TO WRITE"
SET_COM(1,1,1,2,1)
OPEN_COM(1)
CLEAR_COM(1)
SET_RTS(1,1)
LOOP2:
IF INKEY$="" THEN
GOTO LOOP2
END IF
CLOSE_COM(1)
END
READ1:
A$=READ_COM$(1)
PRINT A$
RETURN
Description：
A$ is a string variable to be assigned to the data.
N% is an integer variable indicating which COM port the
data is to be read (now we only can choose 1).
If the receiver buffer is empty, an empty string will be
returned.
- PA-20/PA-2010 1
- PA-21/PA-2110 Basic 1
- Programming Manual 1
- Preface 2
- Table of Contents 3
- 3/143 4
- 4/143 5
- 1 How to run BASIC program 6
- 6/143 7
- Information 8
- 2 Program Structure 9
- Array Variables 10
- Assignment Operator 11
- Arithmetic Operator 11
- Relational Operator 11
- Logical Operator 11
- 2.4 Operator Precedence 12
- 2.5 Labels 12
- 2.6 Subroutines 13
- 2.7 Exit program 14
- 2.8 Special notes 14
- 3 Command Sets 15
- 15/143 16
- SET_PRECISION 17
- 17/143 18
- 18/143 19
- ON … GOSUB … 20
- ON … GOTO … 21
- FOR … NEXT 22
- WHILE … WEND 23
- 23/143 24
- 24/143 25
- TRIM_LEFT$ 26
- TRIM_RIGHT$ 26
- 26/143 27
- 27/143 28
- STRING$ 29
- OFF ALL 30
- OFF ESC 30
- OFF COM 30
- OFF HOUR 31
- OFF KEY 31
- OFF MINUTE 32
- OFF READER 32
- OFF TIMER 33
- ON COM GOSUB 33
- ON ESC GOSUB 34
- ON HOUR GOSUB 34
- ON KEY GOSUB 35
- ON MINUTE GOSUB 35
- ON READER GOSUB 36
- ON TIMER GOSUB 37
- 37/143 38
- 38/143 39
- 3.6 System commands 40
- 40/143 41
- POWER_ON 42
- RESTART 42
- SYSTEM_INFORMATION 42
- SYS_SUSPEND 43
- CHECK_AID 43
- 3.7 Reader commands 44
- SLEEP_READER 45
- GET_READER_DATA$ 45
- GET_READER_DATALEN 46
- READER_CONFIG_START 46
- READER_CONFIG_END 46
- READER_SENDCMD 47
- READER_SENDCMD_LASER 47
- READER_QUERY$ 48
- READER_QUERY_LASER$ 48
- 48/143 49
- SIM_SCANKEY_PRESS 50
- READER_SETFROMFILE 50
- 3.8 Beeper commands 51
- SET_BUZZER_VOL 52
- DAY_OF_WEEK 53
- 53/143 54
- 3.10 LED Command 55
- 3.11 Keypad commands 56
- INPUT_S 57
- INPUT_S_ CARRYENT 58
- INPUT_S_VIBRATE 58
- INPUT_S_SLEEP 59
- INPUT_MODE 59
- KEY_CLICK 59
- ALPHA_LOCK 60
- GET_ALPHA_LOCK 60
- GET_KEY_CLICK 60
- KEYPAD_BL_TIMER 61
- KEYPAD_BL 61
- DEF_PKEY 62
- SCANKEYPWON 63
- GET_SCANKEYPWON 63
- 3.12 LCD Commands 64
- CURSOR_Y 65
- FILL_RECT 65
- ICON_ZONE_PRINT 66
- CLR_RECT 66
- SHOW_IMAGE 67
- CLR_EOL 67
- 3.13 Font 68
- DISPFONT_INFO_WIDTH 69
- 3.14 TextBlock 70
- 3.14.1 TextBlock commands 71
- DEFINETEXTBLOCK_COLOR 71
- DEFINETEXTBLOCK_IMAGE 72
- SETTEXTBLOCK 73
- RESETTEXTBLOCK 73
- PRINTTEXTBLOCK 73
- GETTEXTBLOCKCUR_X 73
- GETTEXTBLOCKCUR_Y 74
- SETTEXTBLOCKCUR 74
- SHOWTEXTBLOCKCURSOR 74
- TEXTBLOCK_SETBGCOLOR 74
- TEXTBLOCK_SETBGIMAGE 75
- TEXTBLOCK_MODE 75
- SWITCHTEXTBLOCK 75
- Standard Commands 76
- OPENOUT 77
- 77/143 78
- BGETEXT 79
- 79/143 80
- 80/143 81
- GET_FILE_ERROR 82
- DBMS Commands 83
- DBMS_INIT_SEARCH 83
- DBMS_INIT_SEARCHADV 84
- DBMS_CLOSE_SEARCH 85
- DBMS_APPEND_DATA 85
- DBMS_DEL_DATA 86
- DBMS_EMPTY 86
- DBMS_FIND_RECORD 86
- DBMS_FIND_RECORD_B 86
- DBMS_GET_COUNT 87
- DBMS_GET_DATA$ 87
- DBMS_UPDATE_DATA 87
- 3.16 Vibrator commands 88
- CLOSE_COM 89
- OPEN_COM 89
- SET_COM 89
- READ_COM$ 90
- WRITE_COM 91
- GET_CTS 91
- SET_RTS 92
- CLEAR_COM 92
- COM_DELIMITER 92
- FILE_TRANS 93
- FILE_TRANS_REALTIME 93
- FILE_TRANS_BAUD 94
- FILE_TRANS_INTERFACE 94
- 3.18 Memory commands 95
- BT_START 96
- BT_STOP 96
- BT_OPEN 97
- BT_CLOSE 97
- BT_WRITE 97
- 97/143 98
- BT_READ$ 99
- BT_GETLOCALINFO$ 99
- 99/143 100
- BT_SETLOCALSET 101
- BT_INQUIRY 101
- BT_GETDEVICEINFO 102
- BT_DISCONNECTALERT 102
- GET_BT_ERROR 103
- 3.20 USB commands 104
- COPYFILETOPDT 105
- BACKUPDATAFILETOPC 105
- SIM_SETSCANNERTYPE 105
- 4 Appendices 106
- 106/143 107
- 107/143 108
- Commands for event trapping 109
- System commands 109
- Reader commands 110
- Buzzer commands 110
- Calendar and timer commands 110
- LED command 111
- Keypad commands 111
- LCD Commands 112
- User font commands 112
- TextBlock commands 113
- File manipulation commands 114
- Vibrator commands 115
- Communication port commands 115
- Memory commands 115
- Bluetooth commands 116
- USB commands 116
- Appendix B 117
- 117/143 118
- 118/143 119
- 119/143 120
- 120/143 121
- 121/143 122
- 122/143 123
- 123/143 124
- 124/143 125
- 125/143 126
- 126/143 127
- 127/143 128
- 128/143 129
- 129/143 130
- 130/143 131
- 131/143 132
- Appendix C 133
- 133/143 134
- 134/143 135
- 135/143 136
- 136/143 137
- 137/143 138
- 138/143 139
- 139/143 140
- Note1: 141
- 141/143 142
- Appendix D 143
- Parameter for Color 143
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