how to set the database in PIC?

[IsaacChuah90]

I'm doing an alarm clock system and I want to set the time for my alarm clock to ring every morning.So how can I set the database in my PIC?I'm using PIC16F877A.Seeking for helps.Thanks.

[Brian Griffin]

I'm doing an alarm clock system and I want to set the time for my alarm clock to ring every morning.So how can I set the database in my PIC?I'm using PIC16F877A.Seeking for helps.Thanks.

As a starter, try the pseudocode:

CODE: SELECT_ALL_CODE

if ( current time == alarm time )
    RingAlarm();


[IsaacChuah90]

Ya.I got it.But if I want to make the clock as a smart system?just like what the cell phone can do.the phone can save the time for the alarm clock to ring every morning from monday until sunday.This is the database I want to set in my PIC.Anything programmer or coding can do this?thanks.

[shahrul]

Ya.I got it.But if I want to make the clock as a smart system?just like what the cell phone can do.the phone can save the time for the alarm clock to ring every morning from monday until sunday.This is the database I want to set in my PIC.Anything programmer or coding can do this?thanks.

Yes, all the data you can save in variable or you can use in EEPROM.

[IsaacChuah90]

Oh.So what programmer to use?C programming or Visual Basic?The database is link with the real time clock that is connected to the PIC.

[temporary40]

Isaac,

I think the word "database" is inappropriate. Database usually refers to a large data storage system for example, Item, Stock, People, like "Employee's Database" or "Stock Database".

What you want is just an alarm clock, I presume. Like in previous post, you will just need EEPROM to store the memory or you no need at all if you do not turn off your alarm clock. (You can use the sleep feature in the PIC).

My advice, you need to tackle the hardware and software. Hardware, you need to have a proper circuitry. Just grab a cytron MBXX and you will do fine.

About the software, you will need simple software engineering skills. Design your requirement and implement a proper algorithm. I would recommend finite state machine because it is easier.

You can use MPLAB IDE as your software development tool with MPLAB C Compiler (it is free from Microchip Technology) and use any programmer from Cytron to boot your program in the chip and you are done.

[Brian Griffin]

There is no database involved.

If stuff permits, use an I2C EEPROM alongside with the DS1307 Real Time Clock to store desired alarm values. If you don't like the values, you can simply delete it in the EEPROM.

A 1~2 kilobits EEPROM will do.

[IsaacChuah90]

Oh..thanks a lot guys.I2C EEPROM alongside with RTC DS1320?other than that can?for example DS1304 or DS1307?thanks.

[Brian Griffin]

Oh..thanks a lot guys.I2C EEPROM alongside with RTC DS1320?other than that can?for example DS1304 or DS1307?thanks.

Sorry, it should be DS1307, not DS1320. It's easily available in Cytron.

If you do not want to use the EEPROM, you can use the microcontroller to store the alarm times.

[IsaacChuah90]

microcontroller to store the alarm times?compare with EEPROM,which 1 is better?Because I need to store many alarm time in my alarm clock from monday to sunday.