#include <stdint.h>
#include <util/delay.h>
#include "tm1638.h"

int
main(void)
{
	uint8_t j, i = 0;

	/* setup */
	TM1638_init(1/*enable*/, 7/*brighness*/);

	/* loop */
	while (1) {
		for (j = 0; j < 8; ++j) {
			TM1638_display_digit(j/*position*/,
				(i + j) % 0x10/*digit*/,
				!!(i % 0x02)/*dot*/);
		}
		_delay_ms(100);
		i++;
	}
}

/**
 * Initialize TM1638 LED controller.
 * Clock pin (TM1638_CLK_PIN), strobe pin (TM1638_STB_PIN)
 * and data pin (TM1638_DIO_PIN) are defined at the top of this file.
 */
void TM1638_init(const uint8_t enable, const uint8_t brightness);

/**
 * Set display brightness.
 * Min brightness: 0
 * Max brightness: 7
 */
void TM1638_set_brightness(const uint8_t brightness);

/**
 * Turn display on/off.
 * value: 1 - on, 0 - off
 */
void TM1638_enable(const uint8_t value);

/**
 * Display raw segments at position (0x00..0x07)
 * 
 *      bits:
 *        -- 0 -- 
 *       |       |
 *       5       1
 *       |       |
 *        -- 6 -- 
 *       |       |
 *       4       2
 *       |       |
 *        -- 3 -- *7
 *
 * Example segment configurations:
 * - for character 'H', segments=0b01110110
 * - for character '-', segments=0b01000000
 * - etc.
 */
void TM1638_display_segments(const uint8_t position, const uint8_t segments);

/**
 * Clear all display segments (including dots).
 */
void TM1638_clear_segments(void);

/**
 * Display digit ('0'..'9') with optional dot at position (0x00..0x07)
 */ 
void TM1638_display_digit(const uint8_t position, const uint8_t digit, const uint8_t dot);

/**
 * Light LED at position (0x00..0x07)
 * value: 1 - on, 0 - off
 */ 
void TM1638_set_led(const uint8_t position, const uint8_t value);

/**
 * Clear all leds.
 */
void TM1638_clear_leds(void);

/**
 * Scan keys.
 */
uint8_t TM1638_scan_keys(void);