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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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*
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* Copyright (C) 2025-2026 Aidan MacDonald
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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 __SDMMC_POLL_H__
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#define __SDMMC_POLL_H__
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#include "timeout.h"
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#include <stdbool.h>
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struct sdmmc_host;
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struct sdmmc_poll
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{
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struct timeout timeout;
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struct sdmmc_host *host;
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bool (*check_inserted)(void);
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bool is_inserted;
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bool is_polling;
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bool last_state;
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bool curr_state;
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};
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/*
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* Simple helper for polling for SD card insertion state.
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* This calls sdmmc_host_set_medium_present() when a change
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* in insertion state is detected via the check_inserted()
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* callback.
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*
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* Call sdmmc_poll_start() to start the poll timer if you
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* use level triggered polling.
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*
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* To use edge triggered events call sdmmc_poll_event() if
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* the return value of check_inserted() may have changed.
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*
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* Changes in the insertion state are debounced before they
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* are reported to the sdmmc_host.
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*/
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void sdmmc_poll_init(struct sdmmc_poll *poll,
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struct sdmmc_host *host,
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bool (*check_inserted) (void));
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void sdmmc_poll_start(struct sdmmc_poll *poll);
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void sdmmc_poll_event(struct sdmmc_poll *poll);
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#endif /* __SDMMC_POLL_H__ */
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