I would like to have the DS1337 SQW/INTB (7) output ticking at 1Hz. Mine presently runs with a 35 us period i.e. 28 KHz or the RS1/2=1 setting but with the wrong crystal!
Is there any way of telling hwclock.sh, hwclock or rtc-ds1307 that .type=ds1337?
Is there then anyway of setting the Control Register bits INTCN, RS2 & RS1?
I originally used Gordon's WiringPi drivers for this so maybe I could use again before hwclock takes over the I2C!
For interest I am using a 0.2F capacitor in-place of battery backup and tentatively it looks like it might supply power for up to 3 days. Apart from the Ice-storm this would cover our typical outages.