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rds95/src/rds.h

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#ifndef RDS_H
#define RDS_H
/* The RDS error-detection code generator polynomial is
* x^10 + x^8 + x^7 + x^5 + x^4 + x^3 + x^0
*/
#define POLY 0x1B9
#define POLY_DEG 10
#define BLOCK_SIZE 16
#define GROUP_LENGTH 4
#define BITS_PER_GROUP (GROUP_LENGTH * (BLOCK_SIZE + POLY_DEG))
#define RDS_SAMPLE_RATE 9500
#define SAMPLES_PER_BIT 8
#define FILTER_SIZE 24
#define SAMPLE_BUFFER_SIZE (SAMPLES_PER_BIT + FILTER_SIZE)
/* Text items
*
*/
#define RT_LENGTH 64
#define PS_LENGTH 8
#define PTYN_LENGTH 8
#define LPS_LENGTH 32
/* AF list size
*
*/
#define MAX_AFS 25
typedef struct rds_af_t {
uint8_t num_entries;
uint8_t num_afs;
uint8_t afs[MAX_AFS];
} rds_af_t;
/* AF codes */
#define AF_CODE_FILLER 205
#define AF_CODE_NO_AF 224
#define AF_CODE_NUM_AFS_BASE AF_CODE_NO_AF
#define AF_CODE_LFMF_FOLLOWS 250
typedef struct rds_params_t {
uint16_t pi; /*Program Identification*/
uint16_t lic; /* Language Identification code. lic should have 12 bits, 16 is the closest */
uint8_t ecc; /* Extended Country Code*/
uint8_t ta; /* Traffic Annoucement*/
uint8_t pty; /* Program Type */
uint8_t tp; /* Traffic Program */
uint8_t ms; /* Music/Speech */
uint8_t di; /* Decoder ID */
/* Program Service */
unsigned char ps[PS_LENGTH];
/* Traffic PS */
uint8_t traffic_ps_on;
unsigned char tps[PS_LENGTH];
/* Radio Text */
unsigned char rt1[RT_LENGTH];
/* Program Type Name */
unsigned char ptyn[PTYN_LENGTH];
/* Alternative Frequencies */
struct rds_af_t af;
/* Clock-time */
uint8_t ct;
/* Long PS */
unsigned char lps[LPS_LENGTH];
/* Program Item Number */
uint8_t pin_day;
uint8_t pin_hour;
uint8_t pin_minute;
} rds_params_t;
/* Here, the first member of the struct must be a scalar to avoid a
warning on -Wmissing-braces with GCC < 4.8.3
(bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119)
*/
/* Group type
*
* 0-15
*/
#define GROUP_TYPE_0 ( 0 << 4)
#define GROUP_TYPE_1 ( 1 << 4)
#define GROUP_TYPE_2 ( 2 << 4)
#define GROUP_TYPE_3 ( 3 << 4)
#define GROUP_TYPE_4 ( 4 << 4)
#define GROUP_TYPE_5 ( 5 << 4)
#define GROUP_TYPE_6 ( 6 << 4)
#define GROUP_TYPE_7 ( 7 << 4)
#define GROUP_TYPE_8 ( 8 << 4)
#define GROUP_TYPE_9 ( 9 << 4)
#define GROUP_TYPE_10 (10 << 4)
#define GROUP_TYPE_11 (11 << 4)
#define GROUP_TYPE_12 (12 << 4)
#define GROUP_TYPE_13 (13 << 4)
#define GROUP_TYPE_14 (14 << 4)
#define GROUP_TYPE_15 (15 << 4)
/* Group versions
*
* The first 4 bits are the group number and the remaining 4 are
* the group version
*/
#define GROUP_VER_A 0
#define GROUP_VER_B 1
/* Version A groups */
#define GROUP_0A (GROUP_TYPE_0 | GROUP_VER_A)
#define GROUP_1A (GROUP_TYPE_1 | GROUP_VER_A)
#define GROUP_2A (GROUP_TYPE_2 | GROUP_VER_A)
#define GROUP_3A (GROUP_TYPE_3 | GROUP_VER_A)
#define GROUP_4A (GROUP_TYPE_4 | GROUP_VER_A)
#define GROUP_5A (GROUP_TYPE_5 | GROUP_VER_A)
#define GROUP_6A (GROUP_TYPE_6 | GROUP_VER_A)
#define GROUP_7A (GROUP_TYPE_7 | GROUP_VER_A)
#define GROUP_8A (GROUP_TYPE_8 | GROUP_VER_A)
#define GROUP_9A (GROUP_TYPE_9 | GROUP_VER_A)
#define GROUP_10A (GROUP_TYPE_10 | GROUP_VER_A)
#define GROUP_11A (GROUP_TYPE_11 | GROUP_VER_A)
#define GROUP_12A (GROUP_TYPE_12 | GROUP_VER_A)
#define GROUP_13A (GROUP_TYPE_13 | GROUP_VER_A)
#define GROUP_14A (GROUP_TYPE_14 | GROUP_VER_A)
#define GROUP_15A (GROUP_TYPE_15 | GROUP_VER_A)
/* Version B groups */
#define GROUP_0B (GROUP_TYPE_0 | GROUP_VER_B)
#define GROUP_1B (GROUP_TYPE_1 | GROUP_VER_B)
#define GROUP_2B (GROUP_TYPE_2 | GROUP_VER_B)
#define GROUP_3B (GROUP_TYPE_3 | GROUP_VER_B)
#define GROUP_4B (GROUP_TYPE_4 | GROUP_VER_B)
#define GROUP_5B (GROUP_TYPE_5 | GROUP_VER_B)
#define GROUP_6B (GROUP_TYPE_6 | GROUP_VER_B)
#define GROUP_7B (GROUP_TYPE_7 | GROUP_VER_B)
#define GROUP_8B (GROUP_TYPE_8 | GROUP_VER_B)
#define GROUP_9B (GROUP_TYPE_9 | GROUP_VER_B)
#define GROUP_10B (GROUP_TYPE_10 | GROUP_VER_B)
#define GROUP_11B (GROUP_TYPE_11 | GROUP_VER_B)
#define GROUP_12B (GROUP_TYPE_12 | GROUP_VER_B)
#define GROUP_13B (GROUP_TYPE_13 | GROUP_VER_B)
#define GROUP_14B (GROUP_TYPE_14 | GROUP_VER_B)
#define GROUP_15B (GROUP_TYPE_15 | GROUP_VER_B)
#define GET_GROUP_TYPE(x) ((x >> 4) & 15)
#define GET_GROUP_VER(x) (x & 1) /* only check bit 0 */
#define DI_STEREO (1 << 0) /* 1 - Stereo */
#define DI_AH (1 << 1) /* 2 - Artificial Head */
#define DI_COMPRESSED (1 << 2) /* 4 - Compressed */
#define DI_DPTY (1 << 3) /* 8 - Dynamic PTY */
/* Bit mask */
/* 8 bit */
#define INT8_ALL 0xff
/* Lower */
#define INT8_L1 0x01
#define INT8_L2 0x03
#define INT8_L3 0x07
#define INT8_L4 0x0f
#define INT8_L5 0x1f
#define INT8_L6 0x3f
#define INT8_L7 0x7f
/* Upper */
#define INT8_U7 0xfe
#define INT8_U6 0xfc
#define INT8_U5 0xf8
#define INT8_U4 0xf0
#define INT8_U3 0xe0
#define INT8_U2 0xc0
#define INT8_U1 0x80
/* Single */
#define INT8_0 0x01
#define INT8_1 0x02
#define INT8_2 0x04
#define INT8_3 0x08
#define INT8_4 0x10
#define INT8_5 0x20
#define INT8_6 0x40
#define INT8_7 0x80
/* 16 bit */
#define INT16_ALL 0xffff
/* Lower */
#define INT16_L1 0x0001
#define INT16_L2 0x0003
#define INT16_L3 0x0007
#define INT16_L4 0x000f
#define INT16_L5 0x001f
#define INT16_L6 0x003f
#define INT16_L7 0x007f
#define INT16_L8 0x00ff
#define INT16_L9 0x01ff
#define INT16_L10 0x03ff
#define INT16_L11 0x07ff
#define INT16_L12 0x0fff
#define INT16_L13 0x1fff
#define INT16_L14 0x3fff
#define INT16_L15 0x7fff
/* Upper */
#define INT16_U15 0xfffe
#define INT16_U14 0xfffc
#define INT16_U13 0xfff8
#define INT16_U12 0xfff0
#define INT16_U11 0xffe0
#define INT16_U10 0xffc0
#define INT16_U9 0xff80
#define INT16_U8 0xff00
#define INT16_U7 0xfe00
#define INT16_U6 0xfc00
#define INT16_U5 0xf800
#define INT16_U4 0xf000
#define INT16_U3 0xe000
#define INT16_U2 0xc000
#define INT16_U1 0x8000
/* Single */
#define INT16_0 0x0001
#define INT16_1 0x0002
#define INT16_2 0x0004
#define INT16_3 0x0008
#define INT16_4 0x0010
#define INT16_5 0x0020
#define INT16_6 0x0040
#define INT16_7 0x0080
#define INT16_8 0x0100
#define INT16_9 0x0200
#define INT16_10 0x0400
#define INT16_11 0x0800
#define INT16_12 0x1000
#define INT16_13 0x2000
#define INT16_14 0x4000
#define INT16_15 0x8000
#define IS_TYPE_B(a) (a[1] & INT16_11)
#ifdef ODA
/*
* RDS ODA ID group
*
* This struct is for defining ODAs that will be transmitted
*
* Can signal version A or B data groups
*/
typedef struct rds_oda_t {
uint8_t group;
uint16_t aid;
uint16_t scb;
} rds_oda_t;
#define MAX_ODAS 8
/*
* ODA AID
*
* Extensive list: https://www.nrscstandards.org/committees/dsm/archive/rds-oda-aids.pdf
*/
#define ODA_AID_RTPLUS 0x4bd7
#endif
extern void init_rds_encoder(struct rds_params_t rds_params);
extern void exit_rds_encoder();
extern void get_rds_bits(uint8_t *bits);
extern void set_rds_pi(uint16_t pi_code);
extern void set_rds_ecc(uint8_t ecc);
extern void set_rds_lic(uint8_t lic);
extern void set_rds_ecclic_toggle(uint8_t toggle);
extern void set_rds_pin_enabled(uint8_t enabled);
extern void set_rds_pin(uint8_t day, uint8_t hour, uint8_t minute);
extern void set_rds_rt1_enabled(uint8_t rt1en);
extern void set_rds_rt1(unsigned char *rt1);
extern void set_rds_ps(unsigned char *ps);
extern void set_rds_tpson(uint8_t tpson);
extern void set_rds_tps(unsigned char *ps);
extern void set_rds_lpson(uint8_t lpson);
extern void set_rds_lps(unsigned char *lps);
#ifdef ODA_RTP
extern void set_rds_rtplus_flags(uint8_t flags);
extern void set_rds_rtplus_tags(uint8_t *tags);
#endif
extern void set_rds_ta(uint8_t ta);
extern void set_rds_pty(uint8_t pty);
extern void set_rds_ptyn_enabled(uint8_t enabled);
extern void set_rds_ptyn(unsigned char *ptyn);
extern void set_rds_af(struct rds_af_t new_af_list);
extern void clear_rds_af();
extern void set_rds_tp(uint8_t tp);
extern void set_rds_ms(uint8_t ms);
extern void set_rds_ct(uint8_t ct);
extern void set_rds_di(uint8_t di);
extern float get_rds_sample();
extern uint16_t get_rds_pi();
extern void set_rds_cg(uint16_t* blocks);
#endif /* RDS_H */
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