[rtems commit] bsp/atsam: Improve RTC power driver

Sebastian Huber sebh at rtems.org
Thu Jun 13 06:49:21 UTC 2019


Module:    rtems
Branch:    master
Commit:    ee366168042de61057a89e3e7aee49c39678c5a3
Changeset: http://git.rtems.org/rtems/commit/?id=ee366168042de61057a89e3e7aee49c39678c5a3

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Wed Jun 12 12:53:22 2019 +0200

bsp/atsam: Improve RTC power driver

Accept a time interval up to 24h.

---

 bsps/arm/atsam/include/bsp/power.h |  4 +++-
 bsps/arm/atsam/start/power-rtc.c   | 31 ++++++++++++++++++++++---------
 2 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/bsps/arm/atsam/include/bsp/power.h b/bsps/arm/atsam/include/bsp/power.h
index a352386..dd9946a 100644
--- a/bsps/arm/atsam/include/bsp/power.h
+++ b/bsps/arm/atsam/include/bsp/power.h
@@ -221,8 +221,10 @@ void atsam_power_handler_sleep_mode(
 typedef struct {
   /**
    * @brief Interval in seconds for which the power off mode should be active.
+   *
+   * An interval up to 24h is supported.
    */
-  uint8_t interval;
+  uint32_t interval;
 } atsam_power_data_rtc_driver;
 
 /**
diff --git a/bsps/arm/atsam/start/power-rtc.c b/bsps/arm/atsam/start/power-rtc.c
index b60235a..313efff 100644
--- a/bsps/arm/atsam/start/power-rtc.c
+++ b/bsps/arm/atsam/start/power-rtc.c
@@ -18,23 +18,36 @@
 
 #include <libchip/chip.h>
 
-#define ATSAM_ENABLE_ALARM_INTERRUPT (1u << 1)
+#define ATSAM_ENABLE_ALARM_INTERRUPT RTC_IER_ALREN
 
-static void set_rtc_alarm_interrupt(uint8_t interval)
+static void set_rtc_alarm_interrupt(uint32_t interval)
 {
 	Rtc *rtc = RTC;
-	rtems_time_of_day tod;
+	uint8_t hour;
+	uint8_t minute;
+	uint8_t second;
+	uint32_t time;
 
 	/* Clear current status register */
 	RTC_ClearSCCR(rtc, 0x3F);
 
-	atsam_rtc_get_time(&tod);
-	tod.second = (tod.second + interval) % 60;
-	tod.second = (((tod.second / 10) << 4) | (tod.second % 10));
+	RTC_GetTime(rtc, &hour, &minute, &second);
+
+	time = UINT32_C(3600) * hour + UINT32_C(60) * minute + second;
+	time = (time + interval) % (UINT32_C(24) * 3600);
+
+	second = (uint8_t) (time % 60);
+	minute = (uint8_t) ((time / 60) % 60);
+	hour = (uint8_t) (time / 3600);
+
+	if (interval < 60) {
+		RTC_SetTimeAlarm(rtc, NULL, NULL, &second);
+	} else if (interval < 3600) {
+		RTC_SetTimeAlarm(rtc, NULL, &minute, &second);
+	} else {
+		RTC_SetTimeAlarm(rtc, &hour, &minute, &second);
+	}
 
-	rtc->RTC_TIMALR &= ~RTC_TIMALR_SECEN;
-	rtc->RTC_TIMALR = tod.second;
-	rtc->RTC_TIMALR |= RTC_TIMALR_SECEN;
 	RTC_EnableIt(rtc, ATSAM_ENABLE_ALARM_INTERRUPT);
 }
 



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