uint32_t RTC_setNextAlarm(uint16_t freq) {
uint32_t unixTime = RTC_getUnixTime();
//can't be faster than once every 2 seconds
if (freq > 43200) freq = 43200;
//period in seconds
float period = 86400.0 / freq;
//current time, in seconds
uint32_t nowSeconds = unixTime % 86400;
//the 'number' of the next alarm
uint32_t alarmNumber = (int) (nowSeconds / period) + 1;
//time of the next alarm
uint32_t newSeconds;
if (alarmNumber == freq)
newSeconds = 0;
else
newSeconds = (alarmNumber * 86400) / freq;
unixTime = unixTime - nowSeconds + newSeconds;
if (newSeconds == 0) unixTime += 86400;
if (RTC_setAlarm(unixTime) == 1) return 0;
return unixTime;
}
/* This function is called for every incoming unicast packet. */
static void
recv_uc(struct unicast_conn *c, const rimeaddr_t *from)
{
struct RTC_time t_now;
struct unicast_message *msg, *tmp, sMsg;
rimeaddr_t *add;
/* The packetbuf_dataptr() returns a pointer to the first data byte
in the received packet. */
msg = (struct unicast_message *)packetbuf_dataptr();
if(msg->type==INIT_RESP)
{
rimeaddr_copy(&nmaddr, from);
id = msg->id;
t_now = msg->time;
RTC_setTime(&t_now);
q.month = t_now.month;
q.day = t_now.day;
q.hours = 18;
q.minutes = 30;
q.seconds = 0;
ioPins_init();
RTC_setAlarm(&q, alarmCallback, RPT_SECOND);
}
}
PROCESS_THREAD(test_RTC_process, ev, data)
{ PROCESS_BEGIN();
leds_off(LEDS_ALL);
// Set the RTC time to be 12:34:56 on 30/1/15
//
struct RTC_time t = {
0, // hundredths
0, // tenths
56, // seconds
34, // minutes
12, // hours
30, // day
01, // month
15 // year
};
struct RTC_alarm q = {
10, // seconds
35, // minutes
12, // hours
30, // day
01 // month
};
RTC_setTime(&t);
// Alarm can be set with a callback
// (or this can be NULL)
RTC_setAlarm(&q, alarmCallback, RPT_MINUTE);
int i = 0;
while(1) {
printf("GOING TO SLEEP\n");
clock_delay_msec(50);
/* ------------
* Go to sleep
* ------------
*/
*CRM_SLEEP_CNTL = 0x71; // hibernate, keep all RAM pages, retain state, don't power GPIO, approx. 2kHz = 16.1uA
while((*CRM_STATUS & 0x1) == 0) // wait for the sleep cycle to complete
{ continue; }
*CRM_STATUS = 1; // write 1 to sleep_sync --- this clears the bit (it's a r1wc bit) and powers down
/* ------------
* Wake up again
* ------------
*/
printf("AWAKE AGAIN\n");
for (i = 0; i < 2; i++)
FLASH_LED(LEDS_ALL);
PROCESS_YIELD();
RTC_getTime(&t);
printf("%02d/%02d/%02d %02d:%02d:%02d.%d%d\n", t.day, t.month, t.year, t.hours, t.minutes, t.seconds, t.tenths, t.hundredths);
}
PROCESS_END();
}
