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add oda af and simplify get_next_af

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kuba
2025-04-13 17:51:22 +02:00
parent b5b2433d40
commit dad88c3dd4
5 changed files with 148 additions and 13 deletions
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src/lib.c
+35
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@@ -81,6 +81,41 @@ void add_checkwords(RDSGroup *group, uint8_t *bits)
}
}
uint8_t add_rds_af_oda(RDSAFsODA *af_list, float freq) {
uint16_t af;
uint8_t entries_reqd = 1;
if (freq < 64.1f || freq > 107.9f) entries_reqd = 2;
if (af_list->num_afs + entries_reqd > MAX_AFS) return 1;
if(freq >= 64.1f && freq <= 88.0f) {
af = (uint16_t)(freq * 10.0f) - 384;
af_list->afs[af_list->num_entries] = af;
af_list->num_entries += 1;
} else if (freq >= 87.6f && freq <= 107.9f) {
af = (uint16_t)(freq * 10.0f) - 875;
af_list->afs[af_list->num_entries] = af;
af_list->num_entries += 1;
} else if (freq >= 153.0f && freq <= 279.0f) {
af = (uint16_t)(freq - 153.0f) / 9 + 1;
af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
af_list->afs[af_list->num_entries + 1] = af;
af_list->num_entries += 2;
} else if (freq >= 531.0f && freq <= 1602.0f) {
af = (uint16_t)(freq - 531.0f) / 9 + 16;
af_list->afs[af_list->num_entries + 0] = AF_CODE_LFMF_FOLLOWS;
af_list->afs[af_list->num_entries + 1] = af;
af_list->num_entries += 2;
} else {
return 1;
}
af_list->num_afs++;
return 0;
}
uint8_t add_rds_af(RDSAFs *af_list, float freq) {
uint16_t af;