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/*
* 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;
// }
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