mirror of
https://github.com/firewalkwithm3/Sensor-Watch.git
synced 2024-11-23 03:30:30 +08:00
54 lines
2.2 KiB
C
54 lines
2.2 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2021 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "watch.h"
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// receives interrupts from MCLK, OSC32KCTRL, OSCCTRL, PAC, PM, SUPC and TAL, whatever that is.
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void SYSTEM_Handler(void) {
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if (SUPC->INTFLAG.bit.BOD33DET) {
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// Our system voltage has dipped below 2.6V!
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// Set the voltage regulator to work at low system voltage before we hit 2.5 V
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// This voltage regulator can carry us down to 1.62 volts as the battery drains.
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SUPC->VREG.bit.LPEFF = 0;
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// clear the interrupt condition
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SUPC->INTENCLR.bit.BOD33DET = 1;
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// and disable the brownout detector (TODO: add a second, "power critical" brownout condition?)
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SUPC->INTFLAG.reg &= ~SUPC_INTFLAG_BOD33DET;
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}
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}
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bool watch_is_buzzer_or_led_enabled(void){
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return hri_mclk_get_APBCMASK_TCC0_bit(MCLK);
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}
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bool watch_is_usb_enabled(void) {
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return USB->DEVICE.CTRLA.bit.ENABLE;
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}
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void watch_reset_to_bootloader(void) {
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volatile uint32_t *dbl_tap_ptr = ((volatile uint32_t *)(HSRAM_ADDR + HSRAM_SIZE - 4));
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*dbl_tap_ptr = 0xf01669ef; // from the UF2 bootloaer: uf2.h line 255
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NVIC_SystemReset();
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}
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