Remote-processing RPC-210 Uživatelský manuál stáhnout pdf (Strana 37)

REAL TIME CLOCK BASIC SECTION 7

Page 7-3

Other software type interrupts that require CPU

processing such as ONTICK, ON LINE, ON COUNT,

or ON KEYPAD are NOT active.

IDLE 1 will work with interrupt 0 only if a CONF IG

BAUD 1,. .. or ON ITR 0 statement w as previously

executed.

SQUARE WAVE OUTPUT

The real time clock can generate square waves in the

frequency range of 2Hz to 8192 Hz. Output is at J7-4.

Application progr am RT C-3. BAS gener ates outputs

based on a user selecte d input.

READING CLOCK SERIAL NUMBER

The real time clock has a unique serial num ber. This

serial number may be used in conjunction with a

program to protect against unauthorized copying.

The ser ial numbe r is rea d using RT C-4. BAS. This

example shows how the serial number may be read and

compared to determine if the software matches the

board. When used in conjunction with the HIDE

comm and, copying your product becom es virtually

impossible.

PROGRAMMABLE INTERRUPTS

The real time clock may be programmed to generate an

interrupt at a preset time. This time may be every

minute, hour, or day. Interrupts are similar to power

down modes described above except in this mode power

is always on.

Program RTC-5. BAS requests the hour, m inute, and

second the interrupt will occur. The hour , m inute, or

second may be “ignored” if desired.

NOTE: When real time clock interrupts use INT0 (J7-

3), COM 1 is not available.

The interrupt line can be brought to one of the lines on

J3. RPBASIC-52's ON LINE or ON COUNT

comm ands can be used to detect the interru pt.

APPLICATION PROGRAMS

The following programs are in the BASIC52 directory.

RTC-5.BAS has a routine for formatting time that may

be useful when using the DISPLAY command.

Name Function

RTC-1.BAS Initialize real time clock

RTC-2.BAS Set wake up time.

RTC-3.BAS Output square wave at J7-4

RTC-4.BAS Reads serial number and compares it

to number in program.

RTC-5.BAS Enables periodic interrupt based on

time.

Tadiran is in Port Washington, NY. Ph: 516 621

4980

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