1 files changed, 167 insertions, 0 deletions
diff --git a/esp8266/modpybrtc.c b/esp8266/modpybrtc.c
new file mode 100644
index 0000000000..c0331760c6
--- /dev/null
+++ b/esp8266/modpybrtc.c
@@ -0,0 +1,167 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Josef Gajdusek
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "py/nlr.h"
+#include "py/obj.h"
+#include "py/runtime.h"
+#include MICROPY_HAL_H
+#include "timeutils.h"
+#include "user_interface.h"
+
+typedef struct _pyb_rtc_obj_t {
+    mp_obj_base_t base;
+} pyb_rtc_obj_t;
+
+#define MEM_MAGIC           0x75507921
+#define MEM_DELTA_ADDR      64
+#define MEM_CAL_ADDR        (MEM_DELTA_ADDR + 2)
+#define MEM_USER_MAGIC_ADDR (MEM_CAL_ADDR + 1)
+#define MEM_USER_LEN_ADDR   (MEM_USER_MAGIC_ADDR + 1)
+#define MEM_USER_DATA_ADDR  (MEM_USER_LEN_ADDR + 1)
+#define MEM_USER_MAXLEN     (512 - (MEM_USER_DATA_ADDR - MEM_DELTA_ADDR) * 4)
+
+STATIC uint64_t pyb_rtc_raw_us(uint64_t cal) {
+    return system_get_rtc_time() * ((cal >> 12) * 1000 + (cal & 0x0) / 4) / 1000;
+};
+
+void pyb_rtc_set_us_since_2000(uint64_t nowus) {
+    uint32_t cal = system_rtc_clock_cali_proc();
+    int64_t delta = nowus - pyb_rtc_raw_us(cal);
+
+    // As the calibration value jitters quite a bit, to make the
+    // clock at least somewhat practially usable, we need to store it
+    system_rtc_mem_write(MEM_CAL_ADDR, &cal, sizeof(cal));
+    system_rtc_mem_write(MEM_DELTA_ADDR, &delta, sizeof(delta));
+};
+
+uint64_t pyb_rtc_get_us_since_2000() {
+    uint32_t cal;
+    int64_t delta;
+
+    system_rtc_mem_read(MEM_CAL_ADDR, &cal, sizeof(cal));
+    system_rtc_mem_read(MEM_DELTA_ADDR, &delta, sizeof(delta));
+
+    return pyb_rtc_raw_us(cal) + delta;
+};
+
+STATIC mp_obj_t pyb_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
+    if (n_args == 1) {
+        // Get time
+        uint64_t msecs = pyb_rtc_get_us_since_2000() / 1000;
+
+        timeutils_struct_time_t tm;
+        timeutils_seconds_since_2000_to_struct_time(msecs / 1000, &tm);
+
+        mp_obj_t tuple[8] = {
+            mp_obj_new_int(tm.tm_year),
+            mp_obj_new_int(tm.tm_mon),
+            mp_obj_new_int(tm.tm_mday),
+            mp_obj_new_int(tm.tm_wday),
+            mp_obj_new_int(tm.tm_hour),
+            mp_obj_new_int(tm.tm_min),
+            mp_obj_new_int(tm.tm_sec),
+            mp_obj_new_int(msecs % 1000)
+        };
+
+        return mp_obj_new_tuple(8, tuple);
+    } else {
+        // Set time
+        mp_obj_t *items;
+        mp_obj_get_array_fixed_n(args[1], 8, &items);
+
+        pyb_rtc_set_us_since_2000(
+            ((uint64_t)timeutils_seconds_since_2000(
+                mp_obj_get_int(items[0]),
+                mp_obj_get_int(items[1]),
+                mp_obj_get_int(items[2]),
+                mp_obj_get_int(items[4]),
+                mp_obj_get_int(items[5]),
+                mp_obj_get_int(items[6])) * 1000 + mp_obj_get_int(items[7])) * 1000);
+
+        return mp_const_none;
+    }
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_rtc_datetime_obj, 1, 2, pyb_rtc_datetime);
+
+STATIC mp_obj_t pyb_rtc_memory(mp_uint_t n_args, const mp_obj_t *args) {
+    uint8_t rtcram[MEM_USER_MAXLEN];
+    uint32_t len;
+    uint32_t magic;
+
+    if (n_args == 1) {
+
+        system_rtc_mem_read(MEM_USER_MAGIC_ADDR, &magic, sizeof(magic));
+        if (magic != MEM_MAGIC) {
+            return mp_const_none;
+        }
+
+        system_rtc_mem_read(MEM_USER_LEN_ADDR, &len, sizeof(len));
+        system_rtc_mem_read(MEM_USER_DATA_ADDR, rtcram, len + (4 - len % 4));
+
+        return mp_obj_new_bytes(rtcram, len);
+    } else {
+        mp_buffer_info_t bufinfo;
+        mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_READ);
+
+        if (bufinfo.len > MEM_USER_MAXLEN) {
+            nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError,
+                "buffer too long"));
+        }
+
+        magic = MEM_MAGIC;
+        system_rtc_mem_write(MEM_USER_MAGIC_ADDR, &magic, sizeof(len));
+        len = bufinfo.len;
+        system_rtc_mem_write(MEM_USER_LEN_ADDR, &len, sizeof(len));
+
+        int i = 0;
+        for (; i < bufinfo.len; i++) {
+            rtcram[i] = ((uint8_t *)bufinfo.buf)[i];
+        }
+
+        system_rtc_mem_write(MEM_USER_DATA_ADDR, rtcram, len + (4 - len % 4));
+
+        return mp_const_none;
+    }
+
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_rtc_memory_obj, 1, 2, pyb_rtc_memory);
+
+STATIC const mp_map_elem_t pyb_rtc_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_datetime), (mp_obj_t)&pyb_rtc_datetime_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_memory), (mp_obj_t)&pyb_rtc_memory_obj },
+};
+STATIC MP_DEFINE_CONST_DICT(pyb_rtc_locals_dict, pyb_rtc_locals_dict_table);
+
+STATIC const mp_obj_type_t pyb_rtc_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_RTC,
+    .locals_dict = (mp_obj_t)&pyb_rtc_locals_dict,
+};
+
+const mp_obj_base_t pyb_rtc_obj = {&pyb_rtc_type};