C5505 RTC ms interrupt problem

Jiří Babka

Hello,

I have problem to set up the interrupt system to be my RTC interrupt routine called every millisecond. When I write value 0x0002 to RTCINTREG register my RTC interrupt routine is called every second. Super! But if I write value 0x0003 or 0x0001 to RTCINTREG register my RTC interrupt routine is never called. I have checked that RTC interrupt is enabled - there is value 0x0001 in RTCINTEN register, bit 2 in IER1 is set, interrupt is globally enabled. Although RTCINTFL register indicates, that second and millisecond event interrupt has occured (value 0x0003), bit 2 in IFR1 remains 0. Do you have an idea why?

Jirka

over 14 years ago

0 DaveB123 over 14 years ago

TI__Expert 4745 points

What values have you placed or initialized in RTCMILA? or RTCSEC?

0 Jiří Babka over 14 years ago in reply to DaveB123

Intellectual 465 points

RTCMILA is milliseconds alarm register. I don't initialize it because I don't use alarms. Is it important to initialize it? I only want to use periodic interrupt which is fired up every millisecond.

RTCSEC? Do you mean RTCSECA? I place a second of actual time from external RTC circuit to RTCSEC. I don't initialize RTCSECA.

Jirka