Hi !
I am working on the AM335x processor and the 1 sec events generated out of RTC.
I modified the code of the rtc-omap.c in the kernel to generate the events out of the chip. My application threads run every second based on the 1sec interrupts. I am measuring a delay from the time the event is generated to the time its read back. Its the same case with the 1sec interrupts from the kernel.
Please find below the time stamps after the 1sec events are generated from the kernel timers..(https://www.kernel.org/doc/Documentation/rtc.txt).. i observe the same delays in the interrupts from the chip.
I read the TRM and it explains that the event is generated at every second change. I would like to know if there is any delay involved in it?? or is it really precise??
psec=54
csec=55
1394192515.686130880
1394192516.686069360
1394192517.686051120
1394192518.686042600
1394192519.686071520
1394192520.686049480
1394192521.686045960
1394192522.686158000
1394192523.685998160
1394192524.686058720
1394192525.686045760
1394192526.686043560
Thanks and Regards,
Harsha Kiran