Matching time conditions

[mackrackit]

I was thinking not to worry about comparing to a DEC. Convert the BCD and compare to the conversion.

If you can not get a solution I will work something up when I get back to the shop tonight.

[malc-c]

Dave, something like

HEXRTCHour = RTCHour & $70
if alarm & $70 = HEXRTCHour then
     alarmled=1
    endif

If so then how do I set the value for the variable alarm ?

Thanks for the offer of some assistance. If you prefer to drop me a pm with e-mail addy, it might save space on the forum server ? - there is also no rush...

[Darrel Taylor]

Here's an idea from a previous thread ...

Calculating Time for clock's preset
http://www.picbasic.co.uk/forum/show...8913#post58913
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[mackrackit]

How about something like this?

alarm = %1001  ' The ninth hour...
RTCHour_BIN = ((RTCHour >> 4) * 10) + (RTCHour & $0f) ' Converts BCD to Binary

[BobK]

Hi Malc-c,

I think I have a grip on what you want to do.

Have you given any thought to using a DS1337 RTC? It has 2 alarms. You can set the alarm times any time you need to change the times. I use it for a clock project and work the entire program including sending time/date information out to a serial display all in HEX. I operate the clock in the 24 hour mode. I even have a test routine that changes the alarm times from the programmed alarm times to 1 minute + current time and put that time in the alarm A register and 2 minutes + current time in the alarm B register then lets me test the actual operation of my project in just a few minutes then restores the normal alarm times. I have had 75 of these clocks out in the field since April of 2007.

Let me know if this is of any interest to you.

BobK

[malc-c]

Hi Bob,

The reason I'm using the 1307 is that it's fitted to the module used with the EasyPIC 5 board, however I could always breadboard a 1337, so your offer of assistance would be very welcome.

I'll drop you a pm as from what you are saying, the two alarms are ideal for my project

Thanks

[Acetronics2]

Hi, Malc

The other RTC Module from MKE ( W/a PCF8583 ) has an Alarm function ...

no comment needed ???

Alain