54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* Quasi-realtime-clock with servo sundial. */
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// ------- Includes -------- //
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include <avr/power.h>
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#include "pinDefines.h"
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#include "USART.h"
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// Global variables that take care of clock
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extern volatile uint16_t ticks;
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extern volatile uint8_t hours; /* arbitrary default time */
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extern volatile uint8_t minutes;
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extern volatile uint8_t seconds;
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// ------- Defines -------- //
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#define PULSE_MIN 1000 /* experiment with these values */
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#define PULSE_MAX 2000 /* to match your own servo */
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#define PULSE_RANGE (PULSE_MAX - PULSE_MIN)
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#define PULSE_OVER 3000 /* Must be larger than PULSE_MAX */
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#define START_TIME 10 /* 10 am */
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#define STOP_TIME 22 /* 10 pm */
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#define HOURS_RANGE (STOP_TIME - START_TIME - 1)
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#define LASER PB2
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#define LASER_PORT PORTB
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#define LASER_DDR DDRB
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#define SERVO PB1
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#define SERVO_PORT PORTB
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#define SERVO_DDR DDRB
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#define OVERFLOWS_PER_SECOND 31250 /* nominal, should calibrate */
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// Serial input and output functions
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void pollSerial(void);
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void printTime(uint8_t hours, uint8_t minutes, uint8_t seconds);
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// Servo setup and utility functions
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void initTimer1_Servo(void);
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void enableServo(void);
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void disableServo(void);
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void setServoPosition(void);
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// Realtime-clock handling functions
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// Use the globals ticks, hours, minutes, seconds
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void initTimer0_Clock(void);
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void everyHour(void);
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void everyMinute(void);
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void everySecond(void);
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