Remote-processing RPC-52 Bedienungsanleitung PDF herunterladen (Seite 24)

CALENDAR/CLOCK CHAPTER 7

Page 22

DESCRIPTION

The RPC-52 has a built in battery backed

Calendar/clock. When used in conjunction with the

DATE and TIME commands, the current date and time

can be set and read. Additionally, the clock can be

programm ed to interr upt the CP U at specific intervals

with a 1 second resolution.

Battery life depends upon the power consumption of

RAM in U3 and the time the board is on. Generally,

you can expect a battery life of 5 to 10 years.

The clock chip, U14, contains a built in cr ystal.

Accuracy is about 1 minute/month and is not adjustable.

Hours are expressed in 24-hour fo rma t.

Refer to the RPBASIC-52 Software Supplement for

more command information.

SETTING DATE AND TIME

The date and time can be set while running a program or

in the immediate mode. Date and time are treated as

numbers and not strings. To set the date and time:

DATE 5,22,93

TIME 13,23,43

The time is set to 1:23:43 PM.

To retrieve date and time as part of a program:

100 PRINT "Time: ",

110 FOR N=0 TO 2

120 PRINT TIME(N),

130 NEXT

140 PRINT "Date: ",

150 FOR N=0 TO 2

160 PRINT DATE(N),

170 NEXT

180 PRINT CR,

190 GOTO 100

run

Time: 13 24 12 Date: 5 22 93

GENERATING INTERRUPTS

The clock chip generates an interrupt every second,

minute, or hour . T hese interrupts m ay be used in

conjunction with the ONTICK construct. Clock

interrupts are captured using ONTIME construct. Refer

to the RPBASIC-52 Software Supplement in this manual

for more information about ONTIME.

COMMANDS

The following is a list of RPBASIC-52 commands for

the calendar/clock.

Command Function

DATE Sets date

DATE(n) Returns date

TIME Sets time

TIME(n) Returns time

ONTIME Interrupt handler

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 35 36

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