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/*
* MIT License
*
* Copyright (c) 2021 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 <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include "saml22.h"
#include "hal_init.h"
#include "pins.h"
#include "watch.h"
#include "tusb.h"
int main(void) {
// ASF code. Initialize the MCU with configuration options from Atmel Studio.
init_mcu();
// check if we are plugged into USB power.
watch_enable_digital_input(VBUS_DET);
watch_enable_pull_down(VBUS_DET);
if (watch_get_pin_level(VBUS_DET)) {
// if so, enable USB functionality.
_watch_enable_usb();
}
watch_disable_digital_input(VBUS_DET);
// initialize the delay driver before any user code is called.
delay_driver_init();
// User code. Give the app a chance to initialize its data structures and state.
app_init();
// If the RTC is already enabled, we're either waking from BACKUP mode or a reset.
// Ideally we should check if the TAMPER or CMP0 (alarm) flags are set.
if (_watch_rtc_is_enabled()) {
// User code. Give the application a chance to restore state from backup registers.
app_wake_from_backup();
// disable the tamper interrupt and clear the tamper bit
hri_rtcmode0_clear_INTEN_TAMPER_bit(RTC);
hri_rtcmode0_clear_interrupt_TAMPER_bit(RTC);
}
// Watch library code. Set initial parameters for the device and enable the RTC.
_watch_init();
// User code. Give the app a chance to enable and set up peripherals.
app_setup();
while (1) {
bool usb_enabled = hri_usbdevice_get_CTRLA_ENABLE_bit(USB);
bool can_sleep = app_loop();
if (can_sleep && !usb_enabled) {
app_prepare_for_standby();
sleep(4);
app_wake_from_standby();
}
}
return 0;
}
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