204 lines
7.3 KiB
C
204 lines
7.3 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2020 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 "hpl_systick_config.h"
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#include "watch_extint.h"
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// this warning only appears when you `make BOARD=OSO-SWAT-A1-02`. it's annoying,
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// but i'd rather have it warn us at build-time than fail silently at run-time.
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// besides, no one but me really has any of these boards anyway.
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#if BTN_ALARM != GPIO(GPIO_PORTA, 2)
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#warning This board revision does not support external wake on BTN_ALARM, so watch_register_extwake_callback will not work with it. Use watch_register_interrupt_callback instead.
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#endif
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void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool level) {
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uint32_t pinmux;
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hri_rtc_tampctrl_reg_t config = RTC->MODE2.TAMPCTRL.reg;
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switch (pin) {
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case A4:
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a4_callback = callback;
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pinmux = PINMUX_PB00G_RTC_IN0;
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config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL0_Pos);
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config |= 1 << RTC_TAMPCTRL_IN0ACT_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL0_Pos;
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break;
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case A2:
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a2_callback = callback;
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pinmux = PINMUX_PB02G_RTC_IN1;
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config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL1_Pos);
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config |= 1 << RTC_TAMPCTRL_IN1ACT_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL1_Pos;
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break;
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case BTN_ALARM:
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gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
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btn_alarm_callback = callback;
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pinmux = PINMUX_PA02G_RTC_IN2;
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config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL2_Pos);
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config |= 1 << RTC_TAMPCTRL_IN2ACT_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL2_Pos;
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break;
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default:
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return;
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}
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gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
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gpio_set_pin_function(pin, pinmux);
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// disable the RTC
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RTC->MODE2.CTRLA.bit.ENABLE = 0;
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while (RTC->MODE2.SYNCBUSY.bit.ENABLE); // wait for RTC to be disabled
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// update the configuration
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RTC->MODE2.TAMPCTRL.reg = config;
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// re-enable the RTC
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RTC->MODE2.CTRLA.bit.ENABLE = 1;
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while (RTC->MODE2.SYNCBUSY.bit.ENABLE); // wait for RTC to be enabled
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NVIC_ClearPendingIRQ(RTC_IRQn);
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NVIC_EnableIRQ(RTC_IRQn);
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RTC->MODE2.INTENSET.reg = RTC_MODE2_INTENSET_TAMPER;
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}
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void watch_disable_extwake_interrupt(uint8_t pin) {
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hri_rtc_tampctrl_reg_t config = hri_rtc_get_TAMPCTRL_reg(RTC, 0xFFFFFFFF);
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switch (pin) {
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case A4:
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a4_callback = NULL;
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config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
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break;
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case A2:
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a2_callback = NULL;
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config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
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break;
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case BTN_ALARM:
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btn_alarm_callback = NULL;
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config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
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break;
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default:
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return;
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}
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if (hri_rtcmode0_get_CTRLA_ENABLE_bit(RTC)) {
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hri_rtcmode0_clear_CTRLA_ENABLE_bit(RTC);
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hri_rtcmode0_wait_for_sync(RTC, RTC_MODE0_SYNCBUSY_ENABLE);
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}
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hri_rtc_write_TAMPCTRL_reg(RTC, config);
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hri_rtcmode0_set_CTRLA_ENABLE_bit(RTC);
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}
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void watch_store_backup_data(uint32_t data, uint8_t reg) {
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if (reg < 8) {
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RTC->MODE0.BKUP[reg].reg = data;
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}
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}
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uint32_t watch_get_backup_data(uint8_t reg) {
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if (reg < 8) {
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return RTC->MODE0.BKUP[reg].reg;
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}
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return 0;
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}
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static void _watch_disable_all_pins_except_rtc(void) {
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uint32_t config = RTC->MODE0.TAMPCTRL.reg;
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uint32_t portb_pins_to_disable = 0xFFFFFFFF;
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// if there's an action set on RTC/IN[0], leave PB00 configured
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if (config & RTC_TAMPCTRL_IN0ACT_Msk) portb_pins_to_disable &= 0xFFFFFFFE;
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// same with RTC/IN[1] and PB02
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if (config & RTC_TAMPCTRL_IN1ACT_Msk) portb_pins_to_disable &= 0xFFFFFFFB;
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// port A: always keep PA02 configured as-is; that's our ALARM button.
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gpio_set_port_direction(0, 0xFFFFFFFB, GPIO_DIRECTION_OFF);
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// port B: disable all pins we didn't save above.
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gpio_set_port_direction(1, portb_pins_to_disable, GPIO_DIRECTION_OFF);
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}
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static void _watch_disable_all_peripherals_except_slcd(void) {
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_watch_disable_tcc();
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watch_disable_adc();
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watch_disable_external_interrupts();
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watch_disable_i2c();
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// TODO: replace this with a proper function when we remove the debug UART
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SERCOM3->USART.CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE;
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MCLK->APBCMASK.reg &= ~MCLK_APBCMASK_SERCOM3;
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}
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void watch_enter_sleep_mode(void) {
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// disable all other peripherals
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_watch_disable_all_peripherals_except_slcd();
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// disable tick interrupt
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watch_rtc_disable_all_periodic_callbacks();
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// disable brownout detector interrupt, which could inadvertently wake us up.
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SUPC->INTENCLR.bit.BOD33DET = 1;
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// per Microchip datasheet clarification DS80000782,
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// work around silicon erratum 1.8.4 by disabling the SysTick interrupt, which is
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// enabled as part of driver init, before going to sleep.
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SysTick->CTRL = SysTick->CTRL & ~(CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos);
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// disable all pins
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_watch_disable_all_pins_except_rtc();
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// enter standby (4); we basically hang out here until an interrupt wakes us.
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sleep(4);
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// and we awake! re-enable the brownout detector and SysTick interrupt
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SUPC->INTENSET.bit.BOD33DET = 1;
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SysTick->CTRL = SysTick->CTRL | (CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos);
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// call app_setup so the app can re-enable everything we disabled.
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app_setup();
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// and call app_wake_from_standby (since main won't have a chance to do it)
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app_wake_from_standby();
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}
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void watch_enter_deep_sleep_mode(void) {
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// identical to sleep mode except we disable the LCD first.
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slcd_sync_deinit(&SEGMENT_LCD_0);
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hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
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watch_enter_sleep_mode();
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}
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void watch_enter_backup_mode(void) {
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watch_rtc_disable_all_periodic_callbacks();
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_watch_disable_all_peripherals_except_slcd();
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slcd_sync_deinit(&SEGMENT_LCD_0);
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hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
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_watch_disable_all_pins_except_rtc();
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// go into backup sleep mode (5). when we exit, the reset controller will take over.
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sleep(5);
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}
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