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70 lines
1.4 KiB
70 lines
1.4 KiB
#include "sevenseg.h"
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#include <avr/interrupt.h>
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#include <util/atomic.h>
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#include <util/delay.h>
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#include <avr/sleep.h>
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#include "time_base.h"
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#include "high_voltage.h"
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#include "radiation.h"
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#include "user_interface.h"
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/* globals */
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volatile bool req_update_display = false;
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volatile bool is_weak_battery = false;
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static void shutdown_due_to_weak_battery();
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void __attribute__((noreturn)) main()
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{
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init_user_interface();
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show_loading_screen(0, true);
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init_timebase();
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init_radiation();
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// --- let's go ---
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sei();
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// this needs interrupts enabled
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init_high_voltage();
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for (;;) {
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_delay_ms(100);
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// check if redraw is needed
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bool update_display = false;
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ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
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update_display = req_update_display;
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req_update_display = false;
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}
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if (update_display) {
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show_current_radiation();
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}
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if (is_weak_battery) {
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shutdown_due_to_weak_battery();
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}
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}
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}
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void __attribute__((noreturn)) shutdown_due_to_weak_battery()
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{
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cli();
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hv_disable();
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show_empty_battery();
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// try to preserve power; but the display will still drain the battery.
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// we should probably shut it off too.
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_delay_ms(2000);
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turn_off_display();
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for (;;) {
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sleep_enable();
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sleep_cpu();
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}
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}
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