136 lines
5.1 KiB
C++
136 lines
5.1 KiB
C++
#ifndef BSP_Q7S_MEMORY_SDCARDACCESSMANAGER_H_
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#define BSP_Q7S_MEMORY_SDCARDACCESSMANAGER_H_
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#include "definitions.h"
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#include "returnvalues/classIds.h"
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#include "fsfw/returnvalues/HasReturnvaluesIF.h"
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#include <cstdint>
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#include <utility>
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#include <string>
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class MutexIF;
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/**
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* @brief Manages handling of SD cards like switching them on or off or getting the current
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* state
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*/
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class SdCardManager {
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friend class SdCardAccess;
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public:
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using SdStatusPair = std::pair<sd::SdStatus, sd::SdStatus>;
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static constexpr uint8_t INTERFACE_ID = CLASS_ID::SD_CARD_MANAGER;
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static constexpr ReturnValue_t ALREADY_ON =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 0);
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static constexpr ReturnValue_t ALREADY_MOUNTED =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 1);
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static constexpr ReturnValue_t ALREADY_OFF =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 2);
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static constexpr ReturnValue_t STATUS_FILE_NEXISTS =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 10);
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static constexpr ReturnValue_t STATUS_FILE_FORMAT_INVALID =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 11);
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static constexpr ReturnValue_t MOUNT_ERROR =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 12);
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static constexpr ReturnValue_t UNMOUNT_ERROR =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 13);
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static constexpr ReturnValue_t SYSTEM_CALL_ERROR =
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HasReturnvaluesIF::makeReturnCode(INTERFACE_ID, 14);
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// C++17 does not support constexpr std::string yet
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static constexpr char SD_0_DEV_NAME[] = "/dev/mmcblk0p1";
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static constexpr char SD_1_DEV_NAME[] = "/dev/mmcblk1p1";
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static constexpr char SD_0_MOUNT_POINT[] = "/mnt/sd0";
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static constexpr char SD_1_MOUNT_POINT[] = "/mnt/sd1";
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static constexpr char SD_STATE_FILE[] = "/tmp/sd_status.txt";
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virtual ~SdCardManager();
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static void create();
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/**
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* Returns the single instance of the SD card manager.
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*/
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static SdCardManager* instance();
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ReturnValue_t setPreferredSdCard(sd::SdCard sdCard);
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ReturnValue_t getPreferredSdCard(sd::SdCard& sdCard) const;
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/**
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* Switch on the specified SD card.
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* @param sdCard
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* @param doMountSdCard Mount the SD card after switching it on, which is necessary
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* to use it
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* @param statusPair If the status pair is already available, it can be passed here
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* @return - RETURN_OK on success, ALREADY_ON if it is already on,
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* SYSTEM_CALL_ERROR on system error
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*/
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ReturnValue_t switchOnSdCard(sd::SdCard sdCard, bool doMountSdCard = true,
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SdStatusPair* statusPair = nullptr);
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/**
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* Switch off the specified SD card.
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* @param sdCard
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* @param doUnmountSdCard Unmount the SD card before switching the card off, which makes
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* the operation safer
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* @param statusPair If the status pair is already available, it can be passed here
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* @return - RETURN_OK on success, ALREADY_ON if it is already on,
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* SYSTEM_CALL_ERROR on system error
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*/
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ReturnValue_t switchOffSdCard(sd::SdCard sdCard, bool doUnmountSdCard = true,
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SdStatusPair* statusPair = nullptr);
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/**
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* Update the state file or creates one if it does not exist. You need to call this
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* function before calling #sdCardActive
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* @return - RETURN_OK if the state file was updated successfully
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* - SYSTEM_CALL_ERROR if the call to create the status file failed
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*/
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ReturnValue_t updateSdCardStateFile();
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/**
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* Get the state of the SD cards. If the state file does not exist, this function will
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* take care of updating it. If it does not, the function will use the state file to get
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* the status of the SD cards and set the field of the provided boolean pair.
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* @param active Pair of booleans, where the first entry is the state of the first SD card
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* and the second one the state of the second SD card
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* @return - RETURN_OK if the state was read successfully
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* - STATUS_FILE_FORMAT_INVALID if there was an issue with the state file. The user
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* should call #updateSdCardStateFile again in that case
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* - STATUS_FILE_NEXISTS if the status file does not exist
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*/
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ReturnValue_t getSdCardActiveStatus(SdStatusPair& active);
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/**
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* Mount the specified SD card. This is necessary to use it.
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* @param sdCard
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* @return
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*/
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ReturnValue_t mountSdCard(sd::SdCard sdCard);
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/**
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* Unmount the specified SD card. This is recommended before switching it off. The SD card
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* can't be used after it has been unmounted.
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* @param sdCard
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* @return
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*/
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ReturnValue_t unmountSdCard(sd::SdCard sdCard);
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private:
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SdCardManager();
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ReturnValue_t setSdCardState(sd::SdCard sdCard, bool on);
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sd::SdCard preferredSdCard = sd::SdCard::SLOT_0;
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void processSdStatusLine(SdStatusPair& active, std::string& line, uint8_t& idx,
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sd::SdCard& currentSd);
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static SdCardManager* factoryInstance;
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};
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#endif /* BSP_Q7S_MEMORY_SDCARDACCESSMANAGER_H_ */
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