43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
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#ifndef LCD_CLOCK_H
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#define LCD_CLOCK_H 1
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/* Global variable used to control the LCD display. Making changes to
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this variable will change the clock time */
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extern int LCD_DISPLAY_PORT;
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/* Time of day in seconds; set by the hardward, read only */
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extern int TIME_OF_DAY_SEC;
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/* Convenience struct for representing the LCD clock as characters */
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typedef struct {
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char chars[5][32];
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} lcd_display;
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/* Use the global LCD_DISPLAY_PORT to print the time */
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void print_lcd_clock();
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/* Print the most signficant (right-most) to least signficant bit in
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the integer passed in */
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void showbits(int x);
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// Breaks time down into 12-hour format
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typedef struct{
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int hours;
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int minutes;
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int seconds;
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int ispm;
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} tod_t;
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// Breaks down the give time of day in seconds into a tod_t struct
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tod_t time_breakdown(int time_of_day);
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// Produce an integer which are the bits representing how the LCD
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// should display based on the given time of day
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int display_bits_from_tod(tod_t tod);
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// Update the global variable LCD_DISPLAY_PORT to match the current
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// time of day
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void lcd_update();
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#endif
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