led.h

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#ifndef LED_H_
#define LED_H_
 
    #ifndef F_CPU
        #define F_CPU 20000000UL
    #endif
 
    #ifndef LED_NUMBER_OF_LEDS
        #define LED_NUMBER_OF_LEDS 2
    #endif
 
    #ifndef LED_FRAME_SIZE
        #define LED_FRAME_SIZE 4
    #endif
 
    #ifndef LED_START_VALUE
        #define LED_START_VALUE 0x00
    #endif
 
    #ifndef LED_STOP_VALUE
        #define LED_STOP_VALUE 0xFF
    #endif
    
    #ifndef LED_ENABLE_FLAG
        #define LED_ENABLE_FLAG 0xE0
    #endif
    
    #ifndef LED_SLEEP_FLAG
        #define LED_SLEEP_FLAG 0xA0
    #endif
    
    #ifndef LED_MIN_INTENSITY
        #define LED_MIN_INTENSITY 0x01
    #endif
 
    #ifndef LED_MAX_INTENSITY
        #define LED_MAX_INTENSITY 0x0F
    #endif
 
    #include <avr/io.h>
    #include <util/delay.h>
 
    #include "../hal/avr0/spi/spi.h"

    enum LED_Status_t
    {
        LED_Status_None=0,
        LED_Status_Ready,
        LED_Status_Warning,
        LED_Status_Error
    };

    typedef enum LED_Status_t LED_Status;

    enum LED_Delay_t
    {
        LED_Delay_None=0,
        LED_Delay_MS_100,
        LED_Delay_MS_200,
        LED_Delay_MS_300,
        LED_Delay_MS_400,
        LED_Delay_MS_500
    };

    typedef enum LED_Delay_t LED_Delay;

    enum LED_Position_t
    {
        LED_Position_None=0x00,
        LED_Position_Left=0x01,
        LED_Position_Right=0x02,
        LED_Position_Left_Alternating=0x04,
        LED_Position_Right_Alternating=0x08,
    };

    typedef enum LED_Position_t LED_Position;

    struct LED_Data_t
    {
        unsigned char intensity;
        unsigned char red;
        unsigned char green;
        unsigned char blue;
    };

    typedef struct LED_Data_t LED_Data;

    #define LED_SOF() { led_xof(LED_START_VALUE); _delay_us(10); }

    #define LED_EOF() { led_xof(LED_STOP_VALUE); _delay_us(10); }
 
    void led_init(void);
    void led_disable(void);
    void led_xof(unsigned char value);
    void led_data(LED_Data data);
    void leds_off(void);
 
    LED_Data led_status_color(LED_Status status, unsigned char intensity);
    void led_color(LED_Position position, LED_Data color);
    void led_blink(LED_Position position, LED_Data color, LED_Delay delay, unsigned char repeat);
 
#endif /* LED_H_ */