1 files changed, 78 insertions, 0 deletions
diff --git a/watch-library/simulator/watch/watch_private.c b/watch-library/simulator/watch/watch_private.c
new file mode 100644
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--- /dev/null
+++ b/watch-library/simulator/watch/watch_private.c
@@ -0,0 +1,78 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020 Joey Castillo
+ *
+ * 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 "watch_private.h"
+#include "watch_utility.h"
+#include <sys/time.h>
+
+void _watch_init(void) {
+    // External wake depends on RTC; calendar is a required module.
+    _watch_rtc_init();
+}
+
+// this function is called by arc4random to get entropy for random number generation.
+// let's use the SAM L22's true random number generator to seed the PRNG!
+int getentropy(void *buf, size_t buflen);
+int getentropy(void *buf, size_t buflen) {
+    // TODO: (a2) hook to RNG
+    return 0;
+}
+
+int _gettimeofday(struct timeval *tv, void *tzvp);
+int _gettimeofday(struct timeval *tv, void *tzvp) {
+    (void)tzvp;
+    watch_date_time date_time = watch_rtc_get_date_time();
+
+    // FIXME: this assumes the system time is UTC! Will break for any other time zone.
+    tv->tv_sec = watch_utility_date_time_to_unix_time(date_time, 0);
+    tv->tv_usec = 0;
+
+    return 0;
+}
+
+void _watch_enable_tcc(void) {}
+
+void _watch_disable_tcc(void) {}
+
+void _watch_enable_usb(void) {}
+
+// this function ends up getting called by printf to log stuff to the USB console.
+int _write(int file, char *ptr, int len) {
+    // TODO: (a2) hook to UI
+    return 0;
+}
+
+// this method could be overridden to read stuff from the USB console? but no need rn.
+int _read(void) {
+    return 0;
+}
+
+// Alternate function that outputs to the debug UART. useful for debugging USB issues.
+// int _write(int file, char *ptr, int len) {
+//     (void)file;
+//     int pos = 0;
+//     while(pos < len) watch_debug_putc(ptr[pos++]);
+
+//     return 0;
+// }