1 files changed, 42 insertions, 0 deletions
diff --git a/keyboards/keychron/bluetooth/rtc_timer.c b/keyboards/keychron/bluetooth/rtc_timer.c
new file mode 100644
index 0000000000..eb8ca6fc28
--- /dev/null
+++ b/keyboards/keychron/bluetooth/rtc_timer.c
@@ -0,0 +1,42 @@
+/* Copyright 2023 @ lokher (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "hal.h"
+
+#if (HAL_USE_RTC)
+
+#    include "rtc_timer.h"
+
+void rtc_timer_init(void) {
+    rtc_timer_clear();
+}
+
+void rtc_timer_clear(void) {
+    RTCDateTime tm = {0, 0, 0, 0, 0, 0};
+    rtcSetTime(&RTCD1, &tm);
+}
+
+uint32_t rtc_timer_read_ms(void) {
+    RTCDateTime tm;
+    rtcGetTime(&RTCD1, &tm);
+
+    return tm.millisecond;
+}
+
+uint32_t rtc_timer_elapsed_ms(uint32_t last) {
+    return TIMER_DIFF_32(rtc_timer_read_ms(), last);
+}
+
+#endif