Raw access to SD and SDHC flash memory cards via shared SPI port. More...

#include <SdSpiCard.h>

Public Member Functions
bool	begin (SdSpiConfig spiConfig)

bool	cardCMD6 (uint32_t arg, uint8_t *status)

void	end ()

bool	erase (uint32_t firstSector, uint32_t lastSector)

bool	eraseSingleSectorEnable ()

void	error (uint8_t code)

uint8_t	errorCode () const

uint32_t	errorData () const

bool	hasDedicatedSpi ()

bool	isBusy ()

bool	isDedicatedSpi ()

bool	isSpi ()

bool	readCID (cid_t *cid)

bool	readCSD (csd_t *csd)

bool	readData (uint8_t *dst)

bool	readOCR (uint32_t *ocr)

bool	readSCR (scr_t *scr)

bool	readSDS (sds_t *status)

bool	readSector (uint32_t sector, uint8_t *dst)

bool	readSectors (uint32_t sector, uint8_t *dst, size_t ns)

bool	readStart (uint32_t sector)

bool	readStop ()

	SdSpiCard ()

uint8_t	sdState ()

uint32_t	sectorCount ()

bool	setDedicatedSpi (bool value)

bool	stopTransfer ()

bool	syncDevice ()

uint8_t	type () const

bool	writeData (const uint8_t *src)

bool	writeSector (uint32_t sector, const uint8_t *src)

bool	writeSectors (uint32_t sector, const uint8_t *src, size_t ns)

bool	writeStart (uint32_t sector)

bool	writeStop ()

Static Public Attributes
static const uint8_t	IDLE_STATE = 0

static const uint8_t	READ_STATE = 1

static const uint8_t	WRITE_STATE = 2

Detailed Description

Raw access to SD and SDHC flash memory cards via shared SPI port.

Constructor & Destructor Documentation

◆ SdSpiCard()

SdSpiCard::SdSpiCard ( )

inline

Construct an instance of SdSpiCard.

Member Function Documentation

◆ begin()

bool SdSpiCard::begin ( SdSpiConfig spiConfig )

Initialize the SD card.

Parameters

[in] spiConfig SPI card configuration.

Returns: true for success or false for failure.

◆ cardCMD6()

bool SdSpiCard::cardCMD6	(	uint32_t	arg,
		uint8_t *	status )

CMD6 Switch mode: Check Function Set Function.

Parameters

[in]	arg	CMD6 argument.
[out]	status	return status data.

Returns: true for success or false for failure.

◆ end()

void SdSpiCard::end ( )

End use of card

◆ erase()

bool SdSpiCard::erase	(	uint32_t	firstSector,
		uint32_t	lastSector )

Erase a range of sectors.

Parameters

[in]	firstSector	The address of the first sector in the range.
[in]	lastSector	The address of the last sector in the range.

Note: This function requests the SD card to do a flash erase for a range of sectors. The data on the card after an erase operation is either 0 or 1, depends on the card vendor. The card must support single sector erase.

Returns: true for success or false for failure.

◆ eraseSingleSectorEnable()

bool SdSpiCard::eraseSingleSectorEnable ( )

Determine if card supports single sector erase.

Returns: true is returned if single sector erase is supported. false is returned if single sector erase is not supported.

◆ error()

void SdSpiCard::error ( uint8_t code )

inline

Set SD error code.

Parameters

[in] code value for error code.

◆ errorCode()

uint8_t SdSpiCard::errorCode ( ) const

inline

Returns: code for the last error. See SdCardInfo.h for a list of error codes.

◆ errorData()

uint32_t SdSpiCard::errorData ( ) const

inline

Returns: error data for last error.

◆ hasDedicatedSpi()

bool SdSpiCard::hasDedicatedSpi ( )

inline

Returns: false for shared class.

◆ isBusy()

bool SdSpiCard::isBusy ( )

Check for busy. MISO low indicates the card is busy.

Returns: true if busy else false.

◆ isDedicatedSpi()

bool SdSpiCard::isDedicatedSpi ( )

inline

Returns: true if in dedicated SPI state.

◆ isSpi()

bool SdSpiCard::isSpi ( )

inline

Returns: true if card is on SPI bus.

◆ readCID()

bool SdSpiCard::readCID ( cid_t * cid )

inline

Read a card's CID register. The CID contains card identification information such as Manufacturer ID, Product name, Product serial number and Manufacturing date.

Parameters

[out] cid pointer to area for returned data.

Returns: true for success or false for failure.

◆ readCSD()

bool SdSpiCard::readCSD ( csd_t * csd )

inline

Read a card's CSD register. The CSD contains Card-Specific Data that provides information regarding access to the card's contents.

Parameters

[out] csd pointer to area for returned data.

Returns: true for success or false for failure.

◆ readData()

bool SdSpiCard::readData ( uint8_t * dst )

Read one data sector in a multiple sector read sequence

Parameters

[out] dst Pointer to the location for the data to be read.

Returns: true for success or false for failure.

◆ readOCR()

bool SdSpiCard::readOCR ( uint32_t * ocr )

Read OCR register.

Parameters

[out] ocr Value of OCR register.

Returns: true for success or false for failure.

◆ readSCR()

bool SdSpiCard::readSCR ( scr_t * scr )

Read SCR register.

Parameters

[out] scr Value of SCR register.

Returns: true for success or false for failure.

◆ readSDS()

bool SdSpiCard::readSDS ( sds_t * status )

Return the 64 byte SD Status register.

Parameters

[out] status location for 64 status bytes.

Returns: true for success or false for failure.

◆ readSector()

bool SdSpiCard::readSector	(	uint32_t	sector,
		uint8_t *	dst )

Read a 512 byte sector from an SD card.

Parameters

[in]	sector	Logical sector to be read.
[out]	dst	Pointer to the location that will receive the data.

Returns: true for success or false for failure.

◆ readSectors()

bool SdSpiCard::readSectors	(	uint32_t	sector,
		uint8_t *	dst,
		size_t	ns )

Read multiple 512 byte sectors from an SD card.

Parameters

[in]	sector	Logical sector to be read.
[in]	ns	Number of sectors to be read.
[out]	dst	Pointer to the location that will receive the data.

Returns: true for success or false for failure.

◆ readStart()

bool SdSpiCard::readStart ( uint32_t sector )

Start a read multiple sector sequence.

Parameters

[in] sector Address of first sector in sequence.

Note: This function is used with readData() and readStop() for optimized multiple sector reads. SPI chipSelect must be low for the entire sequence.

Returns: true for success or false for failure.

◆ readStop()

bool SdSpiCard::readStop ( )

End a read multiple sectors sequence.

Returns: true for success or false for failure.

◆ sdState()

uint8_t SdSpiCard::sdState ( )

inline

Returns: SD multi-sector read/write state

◆ sectorCount()

uint32_t SdSpiCard::sectorCount ( )

Determine the size of an SD flash memory card.

Returns: The number of 512 byte data sectors in the card or zero if an error occurs.

◆ setDedicatedSpi()

bool SdSpiCard::setDedicatedSpi ( bool value )

Set SPI sharing state

Parameters

[in] value desired state.

Returns: true for success.

◆ stopTransfer()

bool SdSpiCard::stopTransfer ( )

end a multi-sector transfer.

Returns: true for success or false for failure.

◆ syncDevice()

bool SdSpiCard::syncDevice ( )

Returns: success if sync successful. Not for user apps.

◆ type()

uint8_t SdSpiCard::type ( ) const

inline

Return the card type: SD V1, SD V2 or SDHC/SDXC

Returns: 0 - SD V1, 1 - SD V2, or 3 - SDHC/SDXC.

◆ writeData()

bool SdSpiCard::writeData ( const uint8_t * src )

Write one data sector in a multiple sector write sequence.

Parameters

[in] src Pointer to the location of the data to be written.

Returns: true for success or false for failure.

◆ writeSector()

bool SdSpiCard::writeSector	(	uint32_t	sector,
		const uint8_t *	src )

Write a 512 byte sector to an SD card.

Parameters

[in]	sector	Logical sector to be written.
[in]	src	Pointer to the location of the data to be written.

Returns: true for success or false for failure.

◆ writeSectors()

bool SdSpiCard::writeSectors	(	uint32_t	sector,
		const uint8_t *	src,
		size_t	ns )

Write multiple 512 byte sectors to an SD card.

Parameters

[in]	sector	Logical sector to be written.
[in]	ns	Number of sectors to be written.
[in]	src	Pointer to the location of the data to be written.

Returns: true for success or false for failure.

◆ writeStart()

bool SdSpiCard::writeStart ( uint32_t sector )

Start a write multiple sectors sequence.

Parameters

[in] sector Address of first sector in sequence.

Note: This function is used with writeData() and writeStop() for optimized multiple sector writes.

Returns: true for success or false for failure.

◆ writeStop()

bool SdSpiCard::writeStop ( )

End a write multiple sectors sequence.

Returns: true for success or false for failure.

Member Data Documentation

◆ IDLE_STATE

const uint8_t SdSpiCard::IDLE_STATE = 0

static

SD is in idle state

◆ READ_STATE

const uint8_t SdSpiCard::READ_STATE = 1

static

SD is in multi-sector read state.

◆ WRITE_STATE

const uint8_t SdSpiCard::WRITE_STATE = 2

static

SD is in multi-sector write state.

The documentation for this class was generated from the following files:

D:/Bill/ArduinoSdFat/libraries/SdFat/src/SdCard/SdSpiCard.h
D:/Bill/ArduinoSdFat/libraries/SdFat/src/SdCard/SdSpiCard.cpp

Public Member Functions

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SdSpiCard()

Member Function Documentation

◆ begin()

◆ cardCMD6()

◆ end()

◆ erase()

◆ eraseSingleSectorEnable()

◆ error()

◆ errorCode()

◆ errorData()

◆ hasDedicatedSpi()

◆ isBusy()

◆ isDedicatedSpi()

◆ isSpi()

◆ readCID()

◆ readCSD()

◆ readData()

◆ readOCR()

◆ readSCR()

◆ readSDS()

◆ readSector()

◆ readSectors()

◆ readStart()

◆ readStop()

◆ sdState()

◆ sectorCount()

◆ setDedicatedSpi()

◆ stopTransfer()

◆ syncDevice()

◆ type()

◆ writeData()

◆ writeSector()

◆ writeSectors()

◆ writeStart()

◆ writeStop()

Member Data Documentation

◆ IDLE_STATE

◆ READ_STATE

◆ WRITE_STATE