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59 lines
1.4 KiB
59 lines
1.4 KiB
#pragma once
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#include "driver/sdmmc_types.h"
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#include "driver/sdspi_host.h"
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#include "esp_err.h"
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#include "esp_vfs_fat.h"
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#include "gpio-expander.h"
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namespace gay_ipod {
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static const char *kStoragePath = "/sd";
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static const uint8_t kMaxOpenFiles = 8;
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class SdStorage {
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public:
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SdStorage(GpioExpander *gpio);
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~SdStorage();
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enum Error {
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OK,
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/** We couldn't interact with the SD card at all. Is it missing? */
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FAILED_TO_READ,
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/** We couldn't mount the SD card. Is it formatted? */
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FAILED_TO_MOUNT,
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};
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// FIXME: these methods should also handling powering the SD card up and
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// down once we have that capability.
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/**
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* Initialises the SDSPI driver and mounts the SD card for reading and
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* writing. This must be called before any interactions with the underlying
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* storage.
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*/
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Error Acquire(void);
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/**
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* Unmounts the SD card and frees memory associated with the SDSPI driver.
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*/
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void Release(void);
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// Not copyable or movable.
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// TODO: maybe this could be movable?
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SdStorage(const SdStorage&) = delete;
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SdStorage& operator=(const SdStorage&) = delete;
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private:
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GpioExpander *gpio_;
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// SPI and SD driver info
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sdspi_dev_handle_t handle_;
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sdmmc_host_t host_;
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sdmmc_card_t card_;
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// Filesystem info
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FATFS *fs_ = nullptr;
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};
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} // namespace gay_ipod
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