kopia lustrzana https://github.com/raspberrypi/pico-playground
57 wiersze
1.5 KiB
C
Executable File
57 wiersze
1.5 KiB
C
Executable File
/**
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "pico/sleep.h"
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static bool awake;
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static void alarm_sleep_callback(uint alarm_id) {
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printf("alarm woke us up\n");
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uart_default_tx_wait_blocking();
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awake = true;
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hardware_alarm_set_callback(alarm_id, NULL);
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hardware_alarm_unclaim(alarm_id);
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}
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int main() {
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stdio_init_all();
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printf("Hello Alarm Sleep!\n");
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do {
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printf("Awake for 10 seconds\n");
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sleep_ms(1000 * 10);
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printf("Switching to XOSC\n");
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// Wait for the fifo to be drained so we get reliable output
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uart_default_tx_wait_blocking();
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// Set the crystal oscillator as the dormant clock source, UART will be reconfigured from here
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// This is only really necessary before sending the pico dormant but running from xosc while asleep saves power
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sleep_run_from_xosc();
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awake = false;
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// Go to sleep until the alarm interrupt is generated after 10 seconds
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printf("Sleeping for 10 seconds\n");
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uart_default_tx_wait_blocking();
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if (sleep_goto_sleep_for(10000, &alarm_sleep_callback)) {
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// Make sure we don't wake
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while (!awake) {
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printf("Should be sleeping\n");
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}
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}
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// Re-enabling clock sources and generators.
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sleep_power_up();
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} while(true);
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return 0;
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}
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