Real Time Clock (Rtca) - Epson S1C31D01 Software Manual

3.13 Real Time Clock (RTCA)

RTCA module is a real-time clock with a perpetual calendar function.
This example shows how to program and read the various functions of the real-time clock such as the time/date,
stopwatch, alarm, and trimming.
Operations
1. Initializes RTCA.
2. Starts RTCA.
3. Calculates TRM.
4. Sets time and date, and reads it back.
5. Sets an alarm and CPU goes to sleep. Expects interrupt while sleeping.
6. Starts 1 second timer to perform trimming.
7. Checks stop watch operations.
Example of Output
-CPU clock- seCLG_IOSC (20000000)
RTCA TRM bits 0x43
RTCA Set hour 4 (PM), minute 17, second 0
RTCA Get hour 4 (PM), minute 17, second 0
RTCA Set year 15, month 2, day 5, Thursday
RTCA Get year, month, day. 2015, 2, 5, Thursday
RTCA Set Alarm hour 4 (PM), minute 17, second 5
RTCA waiting for alarm....
RTCA Alarm occurred : hour 4(PM), minute 17, second 5
RTCA Start Trimming
RTCA waiting for timer....
RTCA Trimming performed : hour 4(PM), minute 17, second 11
RTCA StopWatch (start) : hour 4(PM), minute 17, second 11
RTCA sleep 5 seconds waiting for Stop....
RTCA interrupts disabled for count reading
SysTick 5000
StopWatchHW: 5.14
Exit
48 Seiko Epson Corporation
S1C31D01 Peripheral Circuit Sample
Software Manual (Rev.3.00)