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369 lines
12 KiB
C++
369 lines
12 KiB
C++
/* Arduino SdCard Library
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* Copyright (C) 2016 by William Greiman
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*
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* This file is part of the Arduino SdSpiCard Library
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino SdSpiCard Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SdSpiCard_h
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#define SdSpiCard_h
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/**
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* \file
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* \brief SdSpiCard class for V2 SD/SDHC cards
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*/
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#include <stddef.h>
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#include "SysCall.h"
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#include "SdInfo.h"
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#include "../FatLib/BaseBlockDriver.h"
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#include "../SpiDriver/SdSpiDriver.h"
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//==============================================================================
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/**
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* \class SdSpiCard
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* \brief Raw access to SD and SDHC flash memory cards via SPI protocol.
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*/
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#if ENABLE_EXTENDED_TRANSFER_CLASS || ENABLE_SDIO_CLASS
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class SdSpiCard : public BaseBlockDriver {
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#else // ENABLE_EXTENDED_TRANSFER_CLASS || ENABLE_SDIO_CLASS
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class SdSpiCard {
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#endif // ENABLE_EXTENDED_TRANSFER_CLASS || ENABLE_SDIO_CLASS
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public:
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/** Construct an instance of SdSpiCard. */
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SdSpiCard() : m_errorCode(SD_CARD_ERROR_INIT_NOT_CALLED), m_type(0) {}
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/** Initialize the SD card.
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* \param[in] spi SPI driver for card.
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* \param[in] csPin card chip select pin.
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* \param[in] spiSettings SPI speed, mode, and bit order.
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* \return true for success else false.
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*/
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bool begin(SdSpiDriver* spi, uint8_t csPin, SPISettings spiSettings);
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/**
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* Determine the size of an SD flash memory card.
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*
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* \return The number of 512 byte data blocks in the card
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* or zero if an error occurs.
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*/
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uint32_t cardSize();
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/** Erase a range of blocks.
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*
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* \param[in] firstBlock The address of the first block in the range.
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* \param[in] lastBlock The address of the last block in the range.
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*
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* \note This function requests the SD card to do a flash erase for a
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* range of blocks. The data on the card after an erase operation is
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* either 0 or 1, depends on the card vendor. The card must support
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* single block erase.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool erase(uint32_t firstBlock, uint32_t lastBlock);
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/** Determine if card supports single block erase.
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*
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* \return true is returned if single block erase is supported.
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* false is returned if single block erase is not supported.
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*/
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bool eraseSingleBlockEnable();
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/**
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* Set SD error code.
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* \param[in] code value for error code.
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*/
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void error(uint8_t code) {
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m_errorCode = code;
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}
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/**
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* \return code for the last error. See SdInfo.h for a list of error codes.
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*/
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int errorCode() const {
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return m_errorCode;
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}
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/** \return error data for last error. */
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int errorData() const {
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return m_status;
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}
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/**
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* Check for busy. MISO low indicates the card is busy.
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*
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* \return true if busy else false.
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*/
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bool isBusy();
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/**
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* Read a 512 byte block from an SD card.
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*
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* \param[in] lba Logical block to be read.
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* \param[out] dst Pointer to the location that will receive the data.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readBlock(uint32_t lba, uint8_t* dst);
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/**
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* Read multiple 512 byte blocks from an SD card.
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*
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* \param[in] lba Logical block to be read.
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* \param[in] nb Number of blocks to be read.
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* \param[out] dst Pointer to the location that will receive the data.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readBlocks(uint32_t lba, uint8_t* dst, size_t nb);
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/**
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* Read a card's CID register. The CID contains card identification
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* information such as Manufacturer ID, Product name, Product serial
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* number and Manufacturing date.
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*
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* \param[out] cid pointer to area for returned data.
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*
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* \return true for success or false for failure.
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*/
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bool readCID(cid_t* cid) {
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return readRegister(CMD10, cid);
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}
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/**
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* Read a card's CSD register. The CSD contains Card-Specific Data that
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* provides information regarding access to the card's contents.
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*
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* \param[out] csd pointer to area for returned data.
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*
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* \return true for success or false for failure.
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*/
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bool readCSD(csd_t* csd) {
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return readRegister(CMD9, csd);
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}
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/** Read one data block in a multiple block read sequence
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*
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* \param[out] dst Pointer to the location for the data to be read.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readData(uint8_t *dst);
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/** Read OCR register.
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*
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* \param[out] ocr Value of OCR register.
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* \return true for success else false.
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*/
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bool readOCR(uint32_t* ocr);
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/** Start a read multiple blocks sequence.
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*
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* \param[in] blockNumber Address of first block in sequence.
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*
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* \note This function is used with readData() and readStop() for optimized
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* multiple block reads. SPI chipSelect must be low for the entire sequence.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readStart(uint32_t blockNumber);
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/** Return the 64 byte card status
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* \param[out] status location for 64 status bytes.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readStatus(uint8_t* status);
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/** End a read multiple blocks sequence.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readStop();
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/** \return success if sync successful. Not for user apps. */
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bool syncBlocks() {return true;}
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/** Return the card type: SD V1, SD V2 or SDHC
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* \return 0 - SD V1, 1 - SD V2, or 3 - SDHC.
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*/
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int type() const {
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return m_type;
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}
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/**
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* Writes a 512 byte block to an SD card.
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*
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* \param[in] lba Logical block to be written.
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* \param[in] src Pointer to the location of the data to be written.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeBlock(uint32_t lba, const uint8_t* src);
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/**
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* Write multiple 512 byte blocks to an SD card.
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*
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* \param[in] lba Logical block to be written.
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* \param[in] nb Number of blocks to be written.
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* \param[in] src Pointer to the location of the data to be written.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeBlocks(uint32_t lba, const uint8_t* src, size_t nb);
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/** Write one data block in a multiple block write sequence.
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* \param[in] src Pointer to the location of the data to be written.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeData(const uint8_t* src);
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/** Start a write multiple blocks sequence.
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*
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* \param[in] blockNumber Address of first block in sequence.
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*
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* \note This function is used with writeData() and writeStop()
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* for optimized multiple block writes.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeStart(uint32_t blockNumber);
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/** Start a write multiple blocks sequence with pre-erase.
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*
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* \param[in] blockNumber Address of first block in sequence.
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* \param[in] eraseCount The number of blocks to be pre-erased.
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*
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* \note This function is used with writeData() and writeStop()
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* for optimized multiple block writes.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeStart(uint32_t blockNumber, uint32_t eraseCount);
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/** End a write multiple blocks sequence.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeStop();
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/** Set CS low and activate the card. */
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void spiStart();
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/** Set CS high and deactivate the card. */
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void spiStop();
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private:
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// private functions
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uint8_t cardAcmd(uint8_t cmd, uint32_t arg) {
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cardCommand(CMD55, 0);
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return cardCommand(cmd, arg);
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}
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uint8_t cardCommand(uint8_t cmd, uint32_t arg);
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bool isTimedOut(uint16_t startMS, uint16_t timeoutMS);
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bool readData(uint8_t* dst, size_t count);
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bool readRegister(uint8_t cmd, void* buf);
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void type(uint8_t value) {
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m_type = value;
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}
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bool waitNotBusy(uint16_t timeoutMS);
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bool writeData(uint8_t token, const uint8_t* src);
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//---------------------------------------------------------------------------
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// functions defined in SdSpiDriver.h
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void spiActivate() {
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m_spiDriver->activate();
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}
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void spiDeactivate() {
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m_spiDriver->deactivate();
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}
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uint8_t spiReceive() {
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return m_spiDriver->receive();
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}
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uint8_t spiReceive(uint8_t* buf, size_t n) {
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return m_spiDriver->receive(buf, n);
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}
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void spiSend(uint8_t data) {
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m_spiDriver->send(data);
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}
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void spiSend(const uint8_t* buf, size_t n) {
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m_spiDriver->send(buf, n);
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}
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void spiSelect() {
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m_spiDriver->select();
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}
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void spiUnselect() {
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m_spiDriver->unselect();
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}
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uint8_t m_errorCode;
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SdSpiDriver *m_spiDriver;
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bool m_spiActive;
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uint8_t m_status;
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uint8_t m_type;
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};
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//==============================================================================
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/**
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* \class SdSpiCardEX
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* \brief Extended SD I/O block driver.
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*/
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class SdSpiCardEX : public SdSpiCard {
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public:
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/** Initialize the SD card
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*
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* \param[in] spi SPI driver.
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* \param[in] csPin Card chip select pin number.
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* \param[in] spiSettings SPI speed, mode, and bit order.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool begin(SdSpiDriver* spi, uint8_t csPin, SPISettings spiSettings) {
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m_curState = IDLE_STATE;
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return SdSpiCard::begin(spi, csPin, spiSettings);
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}
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/**
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* Read a 512 byte block from an SD card.
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*
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* \param[in] block Logical block to be read.
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* \param[out] dst Pointer to the location that will receive the data.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readBlock(uint32_t block, uint8_t* dst);
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/** End multi-block transfer and go to idle state.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool syncBlocks();
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/**
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* Writes a 512 byte block to an SD card.
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*
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* \param[in] block Logical block to be written.
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* \param[in] src Pointer to the location of the data to be written.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeBlock(uint32_t block, const uint8_t* src);
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/**
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* Read multiple 512 byte blocks from an SD card.
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*
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* \param[in] block Logical block to be read.
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* \param[in] nb Number of blocks to be read.
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* \param[out] dst Pointer to the location that will receive the data.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool readBlocks(uint32_t block, uint8_t* dst, size_t nb);
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/**
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* Write multiple 512 byte blocks to an SD card.
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*
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* \param[in] block Logical block to be written.
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* \param[in] nb Number of blocks to be written.
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* \param[in] src Pointer to the location of the data to be written.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool writeBlocks(uint32_t block, const uint8_t* src, size_t nb);
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private:
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static const uint32_t IDLE_STATE = 0;
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static const uint32_t READ_STATE = 1;
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static const uint32_t WRITE_STATE = 2;
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uint32_t m_curBlock;
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uint8_t m_curState;
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};
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#endif // SdSpiCard_h
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