fc9695eb47
* Remove unused bits like the radio event and simplify basic radio interface. It can be more self-contained with rds.h only required by radio and tuner code. * Add post-processing to text a-la Silicon Labs AN243. The chip's error correction can only do so much; additional checks are highly recommended. Simply testing for two identical messages in a row is extremely effective and I've never seen corrupted text since doing that, even with mediocre reception. Groups segments must arrive in order, not randomly; logic change only accepts them in order, starting at 0. Time readout was made a bit better but really we'd need to use verbose mode and ensure that no errors were seen during receiving of time and more checks would be need to have a stable PI. The text is the important bit anyway. * Time out of stale text. * Text is no longer updated until a complete group has been received, as is specified in the standard. Perhaps go back to scrolling text lines in the radio screen? * Add proper character conversion to UTF-8. Only the default G0 table for the moment. The other two could be added in. * Add variants "RDS_CFG_PROCESS" and "RDS_CFG_PUSH" to allow the option for processed RDS data to be pushed to the driver and still do proper post-processing (only text conversion for now for the latter). Change-Id: I4d83f8b2e89a209a5096d15ec266477318c66925
62 lines
2 KiB
C
62 lines
2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2011 by Bertrik Sikken
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef RDS_H
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#define RDS_H
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#include <stdint.h>
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#include <stdbool.h>
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#include "time.h"
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void rds_init(void);
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void rds_reset(void);
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void rds_sync(void);
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#if (CONFIG_RDS & RDS_CFG_PROCESS)
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/* RDS raw data processing */
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void rds_process(const uint16_t data[4]);
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#endif /* (CONFIG_RDS & RDS_CFG_PROCESS) */
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enum rds_info_id
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{
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RDS_INFO_NULL = 0,
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RDS_INFO_CODEABLE, /* code table, right now only G0 */
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RDS_INFO_PI, /* programme identifier */
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RDS_INFO_PS, /* programme service name */
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RDS_INFO_RT, /* radio text */
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RDS_INFO_CT, /* clock time */
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};
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enum rds_code_table
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{
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RDS_CT_G0, /* default code table G0 */
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RDS_CT_G1, /* alternate code table G1 */
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RDS_CT_G2, /* alternate code table G2 */
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};
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#if (CONFIG_RDS & RDS_CFG_PUSH)
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/* pushes preprocesed RDS information */
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void rds_push_info(enum rds_info_id info_id, uintptr_t data, size_t size);
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#endif /* (CONFIG_RDS & RDS_CFG_PUSH) */
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/* read fully-processed RDS data */
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size_t rds_pull_info(enum rds_info_id info_id, uintptr_t data, size_t size);
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#endif /* RDS_H */
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