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authorBertrik Sikken <bertrik@sikken.nl>2012-03-08 21:21:31 +0100
committerRafaël Carré <rafael.carre@gmail.com>2012-03-11 22:10:54 +0100
commit727e8aa6817be8816bc32184f2e2eb36b90b4a9e (patch)
treea5e8f7c50ba68bdd4a6ca60c2bdfdbde6a6d6bfd /firmware/drivers/rtc/rtc_as3514.c
parent3448f5b6ad25f59e01ece347cb06e09652915e30 (diff)
downloadrockbox-727e8aa6817be8816bc32184f2e2eb36b90b4a9e.tar.gz
rockbox-727e8aa6817be8816bc32184f2e2eb36b90b4a9e.zip
Introduce gmtime.c and use it in the AS3514 RTC driver
Change-Id: I00a09ae28a68f8153fb8fa854fea741ddfb0bf09 Reviewed-on: http://gerrit.rockbox.org/175 Tested-by: Bertrik Sikken <bertrik@sikken.nl> Reviewed-by: Michael Sevakis <jethead71@rockbox.org> Reviewed-by: Rafaël Carré <rafael.carre@gmail.com>
Diffstat (limited to 'firmware/drivers/rtc/rtc_as3514.c')
-rw-r--r--firmware/drivers/rtc/rtc_as3514.c127
1 files changed, 16 insertions, 111 deletions
diff --git a/firmware/drivers/rtc/rtc_as3514.c b/firmware/drivers/rtc/rtc_as3514.c
index 868fa9753b..a4d2eb13f7 100644
--- a/firmware/drivers/rtc/rtc_as3514.c
+++ b/firmware/drivers/rtc/rtc_as3514.c
@@ -23,34 +23,17 @@
#include "rtc.h"
#include "as3514.h"
#include "ascodec.h"
+#include "time.h"
/* AMS Sansas start counting from Jan 1st 1970 instead of 1980 (not as3525v2) */
#if (CONFIG_CPU==AS3525)
-#define SECS_ADJUST 315532800 /* seconds between 1970-1-1 and 1980-1-1 */
+#define SECS_ADJUST 0
#elif (CONFIG_CPU==AS3525v2)
-#define SECS_ADJUST 315532800 - (2*365*24*3600) - 26*(24*3600) + 7*3600 + 25*60
+#define SECS_ADJUST ((2*365*24*3600) + 26*(24*3600) - 7*3600 - 25*60)
#else
-#define SECS_ADJUST 0
+#define SECS_ADJUST 315532800 /* 1980/1/1 */
#endif
-#define MINUTE_SECONDS 60
-#define HOUR_SECONDS 3600
-#define DAY_SECONDS 86400
-#define WEEK_SECONDS 604800
-#define YEAR_SECONDS 31536000
-#define LEAP_YEAR_SECONDS 31622400
-
-/* Days in each month */
-static unsigned int days_in_month[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-
-static inline bool is_leapyear(int year)
-{
- if( ((year%4)==0) && (((year%100)!=0) || ((year%400)==0)) )
- return true;
- else
- return false;
-}
-
#ifdef HAVE_RTC_ALARM /* as3543 */
static struct {
unsigned int seconds; /* total seconds to wakeup */
@@ -197,109 +180,31 @@ void rtc_init(void)
int rtc_read_datetime(struct tm *tm)
{
char tmp[4];
- int i, year, mday, hour, min;
unsigned int seconds;
+ int i;
- /* RTC_AS3514's slave address is 0x46*/
+ /* Get seconds time stamp from RTC */
for (i = 0; i < 4; i++){
tmp[i] = ascodec_read(AS3514_RTC_0 + i);
}
seconds = tmp[0] + (tmp[1]<<8) + (tmp[2]<<16) + (tmp[3]<<24);
- seconds -= SECS_ADJUST;
- /* Convert seconds since Jan-1-1980 to format compatible with
- * get_time() from firmware/common/timefuncs.c */
+ /* convert to struct tm */
+ time_t time = seconds + SECS_ADJUST;
+ gmtime_r(&time, tm);
- /* weekday */
- tm->tm_wday = ((seconds % WEEK_SECONDS) / DAY_SECONDS + 2) % 7;
-
- /* Year */
- year = 1980;
- while (seconds >= LEAP_YEAR_SECONDS)
- {
- if (is_leapyear(year)){
- seconds -= LEAP_YEAR_SECONDS;
- } else {
- seconds -= YEAR_SECONDS;
- }
-
- year++;
- }
-
- if (is_leapyear(year)) {
- days_in_month[1] = 29;
- } else {
- days_in_month[1] = 28;
- if(seconds>YEAR_SECONDS){
- year++;
- seconds -= YEAR_SECONDS;
- }
- }
- tm->tm_year = year%100 + 100;
-
- /* Month */
- for (i = 0; i < 12; i++)
- {
- if (seconds < days_in_month[i]*DAY_SECONDS){
- tm->tm_mon = i;
- break;
- }
-
- seconds -= days_in_month[i]*DAY_SECONDS;
- }
-
- /* Month Day */
- mday = seconds/DAY_SECONDS;
- seconds -= mday*DAY_SECONDS;
- tm->tm_mday = mday + 1; /* 1 ... 31 */
-
- /* Hour */
- hour = seconds/HOUR_SECONDS;
- seconds -= hour*HOUR_SECONDS;
- tm->tm_hour = hour;
-
- /* Minute */
- min = seconds/MINUTE_SECONDS;
- seconds -= min*MINUTE_SECONDS;
- tm->tm_min = min;
-
- /* Second */
- tm->tm_sec = seconds;
-
- return 7;
+ return 1;
}
int rtc_write_datetime(const struct tm *tm)
{
- int i, year;
- unsigned int year_days = 0;
- unsigned int month_days = 0;
- unsigned int seconds = 0;
-
- year = 2000 + tm->tm_year - 100;
-
- if(is_leapyear(year)) {
- days_in_month[1] = 29;
- } else {
- days_in_month[1] = 28;
- }
-
- /* Number of days in months gone by this year*/
- for(i = 0; i < tm->tm_mon; i++){
- month_days += days_in_month[i];
- }
+ time_t time;
+ unsigned int seconds;
+ int i;
- /* Number of days in years gone by since 1-Jan-1980 */
- year_days = 365*(tm->tm_year-100+20) + (tm->tm_year-100-1)/4 + 6;
-
- /* Convert to seconds since 1-Jan-1980 */
- seconds = tm->tm_sec
- + tm->tm_min*MINUTE_SECONDS
- + tm->tm_hour*HOUR_SECONDS
- + (tm->tm_mday-1)*DAY_SECONDS
- + month_days*DAY_SECONDS
- + year_days*DAY_SECONDS;
- seconds += SECS_ADJUST;
+ /* convert struct tm to time stamp */
+ time = mktime((struct tm *)tm);
+ seconds = time - SECS_ADJUST;
/* Send data to RTC */
for (i=0; i<4; i++){