From da4d936eeed708198494c3cc29c21d637023f472 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Thu, 15 Aug 2019 22:31:31 +0200
Subject: [PATCH] RTC: Add function to set time
This allows to set the current time in milliseconds.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
epicardium/epicardium.h | 6 ++++++
epicardium/modules/rtc.c | 15 +++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/epicardium/epicardium.h b/epicardium/epicardium.h
index 25c239ac..36ea64b8 100644
--- a/epicardium/epicardium.h
+++ b/epicardium/epicardium.h
@@ -66,6 +66,7 @@ typedef _Bool bool;
#define API_RTC_GET_SECONDS 0x50
#define API_RTC_SCHEDULE_ALARM 0x51
+#define API_RTC_SET_MILLISECONDS 0x52
#define API_LEDS_SET 0x60
#define API_LEDS_SET_HSV 0x61
@@ -964,6 +965,11 @@ API(API_FILE_UNLINK, int epic_file_unlink(const char* path));
*/
API(API_RTC_GET_SECONDS, uint32_t epic_rtc_get_seconds(void));
+/**
+ * Sets the current RTC time in milliseconds
+ */
+API(API_RTC_SET_MILLISECONDS, void epic_rtc_set_milliseconds(uint64_t milliseconds));
+
/**
* Schedule the RTC alarm for the given timestamp.
*
diff --git a/epicardium/modules/rtc.c b/epicardium/modules/rtc.c
index edfb0441..030de310 100644
--- a/epicardium/modules/rtc.c
+++ b/epicardium/modules/rtc.c
@@ -25,6 +25,21 @@ uint32_t epic_rtc_get_seconds(void)
return sec;
}
+void epic_rtc_set_milliseconds(uint64_t milliseconds)
+{
+ uint32_t sec, subsec;
+
+ sec = milliseconds / 1000;
+ subsec = (milliseconds % 1000);
+ subsec *= 256;
+ subsec /= 1000;
+
+ while (RTC_Init(MXC_RTC, sec, subsec, NULL) == E_BUSY)
+ ;
+ while (RTC_EnableRTCE(MXC_RTC) == E_BUSY)
+ ;
+}
+
void RTC_IRQHandler(void)
{
int flags = RTC_GetFlags();
--
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