utime method for milliseconds since epoche

epicardium/epicardium.h

@@ -78,6 +78,7 @@ typedef _Bool bool;
 #define API_RTC_GET_SECONDS        0x50
 #define API_RTC_SCHEDULE_ALARM     0x51
 #define API_RTC_SET_MILLISECONDS   0x52
+#define API_RTC_GET_MILLISECONDS   0x53
 
 #define API_LEDS_SET               0x60
 #define API_LEDS_SET_HSV           0x61
@@ -1565,6 +1566,13 @@ API(API_FILE_MKDIR, int epic_file_mkdir(const char *dirname));
  */
 API(API_RTC_GET_SECONDS, uint32_t epic_rtc_get_seconds(void));
 
+/**
+ * Read the current RTC value.
+ *
+ * :return: Unix time in milliseconds
+ */
+API(API_RTC_GET_MILLISECONDS, uint64_t epic_rtc_get_milliseconds(void));
+
 /**
  * Sets the current RTC time in milliseconds
  */

epicardium/modules/rtc.c

@@ -25,6 +25,16 @@ uint32_t epic_rtc_get_seconds(void)
 	return sec;
 }
 
+uint64_t epic_rtc_get_milliseconds(void)
+{
+	uint32_t sec, subsec;
+
+	while (RTC_GetTime(&sec, &subsec) == E_BUSY) {
+		vTaskDelay(pdMS_TO_TICKS(4));
+	}
+	return subsec * 1000ULL / 4096 + sec * 1000ULL;
+}
+
 void epic_rtc_set_milliseconds(uint64_t milliseconds)
 {
 	uint32_t sec, subsec;

pycardium/modules/qstrdefs.h

@@ -47,6 +47,7 @@ Q(ticks_diff)
 Q(localtime)
 Q(mktime)
 Q(time)
+Q(time_ms)
 Q(set_time)
 Q(set_unix_time)
 

pycardium/modules/utime.c

@@ -42,6 +42,16 @@ static mp_obj_t time_time(void)
 }
 MP_DEFINE_CONST_FUN_OBJ_0(time_time_obj, time_time);
 
+
+static mp_obj_t time_time_ms(void)
+{
+	uint64_t milliseconds;
+	milliseconds = epic_rtc_get_milliseconds() - (EPOCH_OFFSET + TZONE_OFFSET) * 1000ULL;
+	return mp_obj_new_int_from_ull(milliseconds);
+}
+MP_DEFINE_CONST_FUN_OBJ_0(time_time_ms_obj, time_time_ms);
+
+
 static mp_obj_t time_localtime(size_t n_args, const mp_obj_t *args)
 {
 	mp_int_t seconds;
@@ -120,6 +130,7 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(time_alarm_obj, 1, 2, time_alarm);
 static const mp_rom_map_elem_t time_module_globals_table[] = {
 	{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_utime) },
 	{ MP_ROM_QSTR(MP_QSTR_time), MP_ROM_PTR(&time_time_obj) },
+	{ MP_ROM_QSTR(MP_QSTR_time_ms), MP_ROM_PTR(&time_time_ms_obj) },
 	{ MP_ROM_QSTR(MP_QSTR_set_time), MP_ROM_PTR(&time_set_time_obj) },
 	{ MP_ROM_QSTR(MP_QSTR_set_unix_time),
 	  MP_ROM_PTR(&time_set_unix_time_obj) },