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alarm system

vead11

Hello

  I need help I have psoc 4200 device. if you look zip file  there is only one LED Pin. and LCD. I am getting current date and time on LCD. now I want to set alarm for LED

  task

.1. get current time and date from RTC

2.print current time and date on LCD

.3 activate alarm date time

4.If alarm is activate turn on LED for 30 second

 

when alarm set blink  LED ? I don't understand how to set alarms. please look my project and tell me what I have to do in program ?

Attachments:
raj.zip
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         Concept is simple. The processor has an internal timer called a watchdog timer. You need to read how to setup the registers since each MCU varies. Usually they are based on ticks that vary in size. Watch for how many it counts since an overflow would be bad for your alarm. They may give a register that scales the ticks by a multiple of say 32 based on a register you set. For example a 1 MHz timer with a 32 multiple would actually be 1,000,000/32 = 31.250 Khz. So 31,250 ticks in a second mean you need 16 bits to count the ticks. Now the watchdog time can interrupt you every second where you can increment your current time by one second. When your time hits 60 seconds, you increment the minutes and reset seconds to 0. When the minutes hit 60, you increment the hours by 1 and reset the minutes to 0. When the hours hit 24(military time), you now have a day and reset hours to zero. Once that is done, have you hit the alarm time you stored somewhere?

    C

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  • 0

         Concept is simple. The processor has an internal timer called a watchdog timer. You need to read how to setup the registers since each MCU varies. Usually they are based on ticks that vary in size. Watch for how many it counts since an overflow would be bad for your alarm. They may give a register that scales the ticks by a multiple of say 32 based on a register you set. For example a 1 MHz timer with a 32 multiple would actually be 1,000,000/32 = 31.250 Khz. So 31,250 ticks in a second mean you need 16 bits to count the ticks. Now the watchdog time can interrupt you every second where you can increment your current time by one second. When your time hits 60 seconds, you increment the minutes and reset seconds to 0. When the minutes hit 60, you increment the hours by 1 and reset the minutes to 0. When the hours hit 24(military time), you now have a day and reset hours to zero. Once that is done, have you hit the alarm time you stored somewhere?

    C

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