1 files changed, 85 insertions, 0 deletions
diff --git a/watch-library/hardware/main.c b/watch-library/hardware/main.c
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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;
+}