#ifndef _IC74HC595_H_
#define _IC74HC595_H_

// We save 4 pins by updating all 3 shift registers at once
// with one clock and one update signal. Each shift register
// only needs its own data line.
#define PIN_74HC595_SCOREBOARD_CLOCK          11
#define PIN_74HC595_MATRIX_CLOCK          12

#define PIN_74HC595_MATRIX_UPDATE 8
#define PIN_74HC595_SCOREBOARD_UPDATE 17

#define PIN_74HC595_MATRIX_DATA              18
#define PIN_74HC595_SCOREBOARD_DATA           14

typedef struct IC74HC595 {
    uint8_t updatepin;
    uint8_t datapin;
    uint8_t clockpin;
} IC74HC595;

extern IC74HC595 matrixcols;
extern IC74HC595 scoreboard;

int init74HC595(IC74HC595 *sr);
int writeIC74HC595Char(IC74HC595 *sr, uint8_t value, uint8_t order);

#endif // _IC74HC595_H_