SdFat

Public Member Functions | List of all members
SdSpiCard Class Reference

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

`#include <SdSpiCard.h>`

## Public Member Functions
bool | begin (SdSpiConfig spiConfig)
void | dbgClearStats ()
void | dbgPrintStats ()
bool | erase (uint32_t firstSector, uint32_t lastSector)
bool | eraseSingleSectorEnable ()
void | error (uint8_t code)
uint8_t | errorCode () const
uint32_t | errorData () const
bool | isBusy ()
bool | readCID (cid_t *cid)
bool | readCSD (csd_t *csd)
bool | readData (uint8_t *dst)
bool | readOCR (uint32_t *ocr)
bool | readSector (uint32_t sector, uint8_t *dst)
bool | readSectors (uint32_t sector, uint8_t *dst, size_t ns)
bool | readSingle (uint32_t sector, uint8_t *dst)
bool | readStart (uint32_t sector)
bool | readStatus (uint8_t *status)
bool | readStop ()
| SdSpiCard ()
uint32_t | sectorCount ()
void | spiStart ()
void | spiStop ()
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 | writeSingle (uint32_t sector, const uint8_t *src)
bool | writeStart (uint32_t sector)
bool | writeStart (uint32_t sector, uint32_t eraseCount)
bool | writeStop ()

## Detailed Description

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

## 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.

## ◆ dbgClearStats()

void SdSpiCard::dbgClearStats | ( |  | ) |

Clear debug stats.

## ◆ dbgPrintStats()

void SdSpiCard::dbgPrintStats | ( |  | ) |

Print debug stats.

## ◆ 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.

## ◆ isBusy()

bool SdSpiCard::isBusy | ( |  | ) |

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

Returns
  true if busy else false.

## ◆ 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.

## ◆ readSector()

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

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.

## ◆ readSingle()

bool SdSpiCard::readSingle | ( | 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.

## ◆ 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.

## ◆ readStatus()

bool SdSpiCard::readStatus | ( | uint8_t * | status | ) |

Return the 64 byte card status

Parameters

  [out] | status | location for 64 status bytes.

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.

## ◆ 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.

## ◆ spiStart()

void SdSpiCard::spiStart | ( |  | ) |

Set CS low and activate the card.

## ◆ spiStop()

void SdSpiCard::spiStop | ( |  | ) |

Set CS high and deactivate the card.

## ◆ 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
| ) |  |
| inline

Writes 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.

## ◆ writeSingle()

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

Writes 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.

## ◆ writeStart() [1/2]

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.

## ◆ writeStart() [2/2]

bool SdSpiCard::writeStart | ( | uint32_t | sector,
|  | uint32_t | eraseCount
| ) |  |

Start a write multiple sector sequence with pre-erase.

Parameters

  [in] | sector | Address of first sector in sequence.
  [in] | eraseCount | The number of sectors to be pre-erased.

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.

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

- Arduino/libraries/SdFat/src/SdCard/SdSpiCard.h
- Arduino/libraries/SdFat/src/SdCard/SdSpiCard.cpp