Appendices
527
*1
The indicator LED is controllable only when the bar code device file is closed. If the file
is opened, the OUT statement will be ignored.
If you have set the indicator LED to OFF in the OPEN "BAR:" statement, then a user
program can control the indicator LED although the bar code device file is opened.
*2
Lower three bits (bit 2 to bit 0) in this byte control the contrast level of the LCD in 000
to 111 in binary notation or in 0 to 7 in decimal notation. 0 means the lowest contrast; 7
means the highest.
OUT 3,7 'Contrast is highest
OUT 3,&h07 'Contrast is highest
*3
The sleep timer feature automatically interrupts program execution if no event takes
place within the specified length of time preset by bit 7 to 0. Shown below are
examples of OUT statements. Setting 0 to this byte disables the sleep timer feature.
(Refer to Chapter 10.)
OUT 6,30 '3 seconds
OUT 6,0 ' No sleep operation
*4
To activate the wakeup function, set 1 to this bit; to deactivate it, set 0.
*5
To make the TIME$ function return or set the system time, set 0 to this bit; to make the
TIME$ function return or set the wakeup time, set 1.
Execution of the TIME$ function after selection of the wakeup time will automatically
reset this bit to zero.
*6
This byte sets the re-read prevention enabled time length in units of 100 ms.
Specification of zero (0) permanently enables the re-read prevention so that the BHT
does not read same bar codes in succession. The default is 10 (1 second).
*7
An 8-bit binary pattern (bits 7 to 0) on the output ports (which are stored in the VRAM)
10h to 1DBFh represents a basic dot pattern column of the LCD. Bit value 1 means a
black dot.
The port number gives the dot column address.
*8
Refer to Appendix H, "Program file named APLINT.PD3."
*9
If the backlight function is activated with the OUT statement, the specification by the KEY
statement will be ignored. For details, refer to Chapter 13.
If you set 0 to the ON-duration (6021h), the backlight will not come on; if you set 255, it
will be kept on.
*10
You can set the held-down time of the power key required for powering off the BHT.
The setting range is from 0.1 to 25.5 seconds in increments of 0.1 second. The default
is 5 (0.5 second).
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