1 files changed, 72 insertions, 0 deletions
diff --git a/apps/main_clock.c b/apps/main_clock.c
new file mode 100644
index 0000000..ec95585
--- /dev/null
+++ b/apps/main_clock.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "hardware/rtc.h"
+#include "pico/util/datetime.h"
+#include "../oled/ss_oled.h"
+
+#include "main_clock.h"
+
+// Time as string
+// Adapted from pico-sdk/scr/common/pico_util/datetime.c
+void time_as_str(char *buf, uint buf_size, const datetime_t *t) {
+    snprintf(buf,
+             buf_size,
+             "%d:%02d:%02d",
+             t->hour,
+             t->min,
+             t->sec);
+};
+void date_as_str(char *buf, uint buf_size, const datetime_t *t) {
+    static const char *DATETIME_DOWS[7] = {
+        "Sun",
+        "Mon",
+        "Tue",
+        "Wed",
+        "Thu",
+        "Fri",
+        "Sat",
+    };
+    snprintf(buf,
+             buf_size,
+             "%02d-%02d-%02d %s",
+             t->year,
+             t->month,
+             t->day,
+             DATETIME_DOWS[t->dotw - 1]);
+};
+
+void show_datetime(SSOLED *oled) {
+    char datetime_buf[256];
+    char *datetime_str = &datetime_buf[0];
+    datetime_t t;
+    rtc_get_datetime(&t);
+
+    // time
+    time_as_str(datetime_str, sizeof(datetime_buf), &t);
+    oledWriteString(oled, 0,10,3, datetime_str, FONT_12x16, 0, 1);
+
+    // date
+    date_as_str(datetime_str, sizeof(datetime_buf), &t);
+    oledWriteString(oled, 0,0,7, datetime_str, FONT_8x8, 0, 1);
+}
+
+int main_clock_render(SSOLED *oled, char *data, uint data_size) {
+    show_datetime(oled);
+//    data[1] += 1; // testing
+//    oledWriteString(oled, 0,0,2, &data[0], FONT_6x8, 0, 1);
+    return 0;
+}
+
+int main_clock_init(SSOLED *oled, char *data, uint data_size) {
+//    data[0] = 'a'; // testing, to showcase the use of data
+//    data[1] = 'b';
+    return 1; // return 1 when function not implemented
+}
+
+int main_clock_bgrefresh(SSOLED *oled, char *data, uint data_size) {
+    return 1;
+}
+
+int main_clock_destroy(SSOLED *oled, char *data, uint data_size) {
+    return 1;
+}