tinylor.h

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#ifndef TINYLOR_H
#define TINYLOR_H
 
#include <stddef.h>
 
typedef unsigned short lor_channel;
 
typedef unsigned char lor_intensity;
 
typedef unsigned char lor_unit;
 
typedef unsigned short lor_decisec;
 
typedef struct lor_channel_set {
  unsigned char offset;
  unsigned short cbits;
} lor_channel_set;
 
typedef enum lor_effect {
  LOR_SET_LIGHTS = 0x01,       
  LOR_SET_OFF = 0x02,          
  LOR_SET_INTENSITY = 0x03,    
  LOR_FADE = 0x04,             
  LOR_PULSE = 0x05,            
  LOR_TWINKLE = 0x06,          
  LOR_SHIMMER = 0x07,          
  LOR_SET_DMX_INTENSITY = 0x08,
} lor_effect;
 
typedef enum lor_channel_format {
  LOR_FMT_SINGLE = 0x00,   
  LOR_FMT_16 = 0x10,       
  LOR_FMT_8L = 0x20,       
  LOR_FMT_8H = 0x30,       
  LOR_FMT_UNIT = 0x40,     
  LOR_FMT_MULTIPART = 0x50,
} lor_channel_format;
 
typedef union lor_effect_data {
  struct {
    lor_intensity intensity;
  } set_intensity;
  struct {
    lor_intensity start_intensity;
    lor_intensity end_intensity;
    lor_decisec deciseconds;
  } fade;
  struct {
    lor_decisec deciseconds;
  } pulse;
  struct {
    unsigned char output;
  } set_dmx_intensity;
} lor_effect_args_u;
 
#define LOR_HEARTBEAT_BYTES ((unsigned char[]){0, 0xFF, 0x81, 0x56, 0})
 
#define LOR_HEARTBEAT_SIZE 5
 
#define LOR_HEARTBEAT_DELAY_MS 500
 
#define LOR_HEARTBEAT_DELAY_NS 500000000
 
typedef struct lor_req {
  lor_effect effect;
  lor_effect_args_u args;
  lor_channel_set cset;
  lor_unit unit;
} lor_req_s;
 
void lor_set_channel(lor_req_s* req, lor_channel c);
 
void lor_set_channels(lor_req_s* req, lor_channel first, unsigned short cbits);
 
void lor_set_unit(lor_req_s* req, lor_unit u);
 
int lor_set_effect(lor_req_s* req, lor_effect e, const lor_effect_args_u* args);
 
void lor_set_intensity(lor_req_s* req, lor_intensity i);
 
void lor_set_fade(lor_req_s* req, lor_intensity start, lor_intensity end,
                  lor_decisec ds);
 
size_t lor_write(unsigned char* b, size_t bs, const lor_req_s* r, size_t rs);
 
typedef lor_intensity (*lor_intensity_fn)(unsigned char b);
 
lor_intensity lor_get_intensity(unsigned char b);
 
#endif// TINYLOR_H