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UC-8100-LX Software Manual Programmer's Guide
6-7
55B
RTC (Real Time Clock)
The device node is located at /dev/rtc0 . UC-8100-LX series supports Linux standard simple RTC control. You
must
include <linux/rtc.h
> in your program to use the following functions.
Function RTC_RD_TIME
Description Read time information from RTC. It will return the value on argument 3.
Usage struct rtc_time rtc_tm;
ioctl(fd, RTC_RD_TIME, &rtc_tm);
Function RTC_SET_TIME
Description Set RTC time. Argument 3 will be passed to RTC.
Usage struct rtc_time rtc_tm;
ioctl(fd, RTC_SET_TIME, &rtc_tm);
Function RTC_ALM_SET
Description Set alarm time.
Usage struct rtc_time rtc_tm;
ioctl(fd, RTC_ALM_SET, &rtc_tm);
Function RTC_ALM_READ
Description Read alarm time.
Usage struct rtc_time rtc_tm;
ioctl(fd, RTC_ALM_READ, &rtc_tm);
Function RTC_IRQP_SET
Description Set IRQ rate
Usage unsigned long tmp = 2;
int ioctl(fd, RTC_IRQP_SET, tmp);
value : {2, 4, 8, 16, 32,64}Hz
Function RTC_IRQP_READ
Description Read IRQ rate.
Usage unsigned long tmp;
int ioctl(fd, RTC_IRQP_READ, &tmp);
Function RTC_ALM_SET
Description Set alarm time.
Usage struct rtc_time rtc_tm;
ioctl(fd, RTC_ALM_SET, &rtc_tm);
Function RTC_PIE_ON
Description Periodic int. enable on
Usage int ioctl(fd, RTC_PIE_ON, 0);
Function RTC_PIE_OFF
Description Periodic int. enable off.
Usage int ioctl(fd, RTC_PIE_OFF, 0);
Function RTC_UIE_ON
Description Update int. enable on.
Usage int ioctl(fd, RTC_UIE_ON, 0);
Function RTC_UIE_OFF
Description Update int. enable off
Usage int ioctl(fd, RTC_UIE_OFF, 0);
Function RTC_AIE_ON
Description Periodic int. enable on
Usage int ioctl (fd, RTC_AIE_ON, 0);
Function RTC_AIE_OFF
Description Alarm int. enable off
Usage int ioctl (fd, RTC_AIE_OFF, 0);
Refer to the example in example package on how to use these functions