rtcc on timer 1 ... is possible ?

[Flavio58]

In my project I use two crystal quartz.
The first is a 4 MHZ quartz connected to OSC1 and OSC2 and is used as pic clock.
The second quartz is a 32 KHZ quartz connected to RC0/T1OSO/T1CKL and RC1/T1OSI/CCP2 and is used to maintain the date/time as number of seconds since a start date (as PC bios).
I saw some CCS examples where to count the seconds number is used the rtcc interrupt.
The set_rtcc() is the same of set_timer0() and in these examples the rtcc is connected to timer0.
Is possible to use the rtcc interrupt on timer1() ?
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This message was ported from CCS's old forum
Original Post ID: 144516642

[Mark]

No, the rtcc int is for timer0 the timer1 int is for timer1. To answer your question, yes you can use timer1 with an external clock to count your seconds. I would use one of the CCP ints (compare mode with special event trigger). This allows the CCP value to be a 16 bit period for timer1. It also allows you some adjustablity if you find you time to be slightly off.


:=In my project I use two crystal quartz.
:=The first is a 4 MHZ quartz connected to OSC1 and OSC2 and is used as pic clock.
:=The second quartz is a 32 KHZ quartz connected to RC0/T1OSO/T1CKL and RC1/T1OSI/CCP2 and is used to maintain the date/time as number of seconds since a start date (as PC bios).
:=I saw some CCS examples where to count the seconds number is used the rtcc interrupt.
:=The set_rtcc() is the same of set_timer0() and in these examples the rtcc is connected to timer0.
:=Is possible to use the rtcc interrupt on timer1() ?
___________________________
This message was ported from CCS's old forum
Original Post ID: 144516653