DS1302 RTC driver (#258)

examples/ds1302_test/Makefile

@@ -0,0 +1,4 @@
+PROGRAM = ds1302_test
+EXTRA_COMPONENTS = extras/ds1302
+#ESPBAUD = 460800
+include ../../common.mk

examples/ds1302_test/main.c

@@ -0,0 +1,48 @@
+/*
+ * Example of using DS1302 RTC driver
+ *
+ * Part of esp-open-rtos
+ * Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
+ *                    Pavel Merzlyakov <merzlyakovpavel@gmail.com>
+ * BSD Licensed as described in the file LICENSE
+ */
+#include <esp/uart.h>
+#include <espressif/esp_common.h>
+#include <ds1302/ds1302.h>
+#include <stdio.h>
+
+#define CE_PIN   5
+#define IO_PIN   4
+#define SCLK_PIN 0
+
+void user_init(void)
+{
+    uart_set_baud(0, 115200);
+    printf("SDK version:%s\n", sdk_system_get_sdk_version());
+
+    struct tm time = {
+        .tm_year = 2016,
+        .tm_mon  = 9,
+        .tm_mday = 31,
+        .tm_hour = 21,
+        .tm_min  = 54,
+        .tm_sec  = 10
+    };
+
+    ds1302_init(CE_PIN, IO_PIN, SCLK_PIN);
+    ds1302_set_write_protect(false);
+
+    ds1302_set_time(&time);
+    ds1302_start(true);
+
+    while (true)
+    {
+        ds1302_get_time(&time);
+
+        printf("%04d-%02d-%02d %02d:%02d:%02d\n", time.tm_year, time.tm_mon + 1,
+            time.tm_mday, time.tm_hour, time.tm_min, time.tm_sec);
+
+        for (uint32_t i = 0; i < 1000; i++)
+            sdk_os_delay_us(500);
+    }
+}