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192 lines
7.0 KiB
192 lines
7.0 KiB
/* Arduino FAT16 Library
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* Copyright (C) 2008 by William Greiman
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*
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* This file is part of the Arduino FAT16 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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* You should have received a copy of the GNU General Public License
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* along with the Arduino Fat16 Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SdCard_h
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#define SdCard_h
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/**
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* \file
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* SdCard class
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*/
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#include <SdInfo.h>
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//------------------------------------------------------------------------------
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// Warning only SD_CHIP_SELECT_PIN, the SD card select pin, may be redefined.
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// define hardware SPI pins
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#if defined(__AVR_ATmega168__)\
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||defined(__AVR_ATmega168P__)\
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||defined(__AVR_ATmega328P__)
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// 168 and 328 Arduinos
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/** Slave Select pin */
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uint8_t const SPI_SS_PIN = 10;
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/** Master Out Slave In pin */
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uint8_t const SPI_MOSI_PIN = 11;
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/** Master In Slave Out pin */
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uint8_t const SPI_MISO_PIN = 12;
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/** Serial Clock */
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uint8_t const SPI_SCK_PIN = 13;
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//------------------------------------------------------------------------------
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#elif defined(__AVR_ATmega1280__)\
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|| defined(__AVR_ATmega2560__)
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// pins for Arduino Mega
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uint8_t const SPI_SS_PIN = 53;
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uint8_t const SPI_MOSI_PIN = 51;
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uint8_t const SPI_MISO_PIN = 50;
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uint8_t const SPI_SCK_PIN = 52;
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//------------------------------------------------------------------------------
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#elif defined(__AVR_ATmega644P__)\
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|| defined(__AVR_ATmega644__)\
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|| defined(__AVR_ATmega1284P__)
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// pins for Sanguino
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uint8_t const SPI_SS_PIN = 4;
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uint8_t const SPI_MOSI_PIN = 5;
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uint8_t const SPI_MISO_PIN = 6;
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uint8_t const SPI_SCK_PIN = 7;
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//------------------------------------------------------------------------------
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#elif defined(__AVR_ATmega32U4__)
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// pins for Teensy 2.0
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uint8_t const SPI_SS_PIN = 0;
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uint8_t const SPI_MOSI_PIN = 2;
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uint8_t const SPI_MISO_PIN = 3;
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uint8_t const SPI_SCK_PIN = 1;
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//------------------------------------------------------------------------------
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#elif defined(__AVR_AT90USB646__)\
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|| defined(__AVR_AT90USB1286__)
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// pins for Teensy++ 1.0 & 2.0
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uint8_t const SPI_SS_PIN = 20;
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uint8_t const SPI_MOSI_PIN = 22;
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uint8_t const SPI_MISO_PIN = 23;
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uint8_t const SPI_SCK_PIN = 21;
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//------------------------------------------------------------------------------
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#else // SPI pins
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#error unknown CPU
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#endif // SPI pins
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//------------------------------------------------------------------------------
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/**
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* SD Chip Select pin
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*
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* Warning if this pin is redefined the hardware SS pin will be enabled
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* as an output by init(). An avr processor will not function as an SPI
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* master unless SS is set to output mode.
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*
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* For example to set SD_CHIP_SELECT_PIN to 8 for the SparkFun microSD shield:
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* uint8_t const SD_CHIP_SELECT_PIN = 8;
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*
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* The default chip select pin for the SD card is SS.
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*/
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uint8_t const SD_CHIP_SELECT_PIN = SPI_SS_PIN;
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//------------------------------------------------------------------------------
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/** command timeout ms */
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uint16_t const SD_COMMAND_TIMEOUT = 300;
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/** init timeout ms */
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uint16_t const SD_INIT_TIMEOUT = 2000;
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/** read timeout ms */
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uint16_t const SD_READ_TIMEOUT = 300;
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/** write timeout ms */
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uint16_t const SD_WRITE_TIMEOUT = 600;
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//------------------------------------------------------------------------------
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// error codes
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/** Card did not go into SPI mode */
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uint8_t const SD_ERROR_CMD0 = 1;
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/** Card did not go ready */
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uint8_t const SD_ERROR_ACMD41 = 2;
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/** Write command not accepted */
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uint8_t const SD_ERROR_CMD24 = 3;
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/** Read command not accepted */
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uint8_t const SD_ERROR_CMD17 = 4;
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/** timeout waiting for read data */
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uint8_t const SD_ERROR_READ_TIMEOUT = 5;
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/** write error occurred */
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uint8_t const SD_ERROR_WRITE_RESPONSE = 6;
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/** timeout waiting for write status */
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uint8_t const SD_ERROR_WRITE_TIMEOUT = 7;
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/** attempt to write block zero */
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uint8_t const SD_ERROR_BLOCK_ZERO_WRITE = 8;
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/** card returned an error to a CMD13 status check after a write */
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uint8_t const SD_ERROR_WRITE_PROGRAMMING = 9;
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/** invalid SPI speed in init() call */
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uint8_t const SD_ERROR_SPI_SPEED = 10;
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//------------------------------------------------------------------------------
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// SD command codes
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/** SEND OPERATING CONDITIONS */
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uint8_t const ACMD41 = 0X29;
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/** GO_IDLE_STATE - init card in spi mode if CS low */
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uint8_t const CMD0 = 0X00;
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/** SEND_CSD - Card Specific Data */
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uint8_t const CMD9 = 0X09;
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/** SEND_CID - Card IDentification */
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uint8_t const CMD10 = 0X0A;
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/** SEND_STATUS - read the card status register */
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uint8_t const CMD13 = 0X0D;
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/** READ_BLOCK */
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uint8_t const CMD17 = 0X11;
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/** WRITE_BLOCK */
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uint8_t const CMD24 = 0X18;
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/** APP_CMD - escape for application specific command */
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uint8_t const CMD55 = 0X37;
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//------------------------------------------------------------------------------
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/**
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* \class SdCard
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* \brief Hardware access class for SD flash cards
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*
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* Supports raw access to a standard SD flash memory card.
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*
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*/
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class SdCard {
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public:
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/** Code for a SD error. See SdCard.h for definitions. */
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uint8_t errorCode;
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/** Data that may be helpful in determining the cause of an error */
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uint8_t errorData;
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uint32_t cardSize(void);
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/**
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* Initialize an SD flash memory card with default clock rate and chip
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* select pin. See SdCard::init(uint8_t sckRateID, uint8_t chipSelectPin).
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*/
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uint8_t init(void) {
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return init(0, SD_CHIP_SELECT_PIN);
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}
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/**
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* Initialize an SD flash memory card with the selected SPI clock rate
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* and the default SD chip select pin.
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* See SdCard::init(uint8_t slow, uint8_t chipSelectPin).
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*/
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uint8_t init(uint8_t speed) {
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return init(speed, SD_CHIP_SELECT_PIN);
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}
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uint8_t init(uint8_t speed, uint8_t chipselectPin);
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uint8_t readBlock(uint32_t block, uint8_t* dst);
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/** Read the CID register which contains info about the card.
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* This includes Manufacturer ID, OEM ID, product name, version,
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* serial number, and manufacturing date. */
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uint8_t readCID(cid_t* cid) {
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return readReg(CMD10, cid);
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}
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uint8_t writeBlock(uint32_t block, const uint8_t* src);
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private:
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uint8_t cardAcmd(uint8_t cmd, uint32_t arg);
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uint8_t cardCommand(uint8_t cmd, uint32_t arg);
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uint8_t chipSelectPin_;
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uint8_t speed_;
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void chipSelectHigh(void);
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void chipSelectLow(void);
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void error(uint8_t code, uint8_t data);
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void error(uint8_t code);
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uint8_t readReg(uint8_t cmd, void* buf);
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uint8_t readTransfer(uint8_t* dst, uint16_t count);
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};
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#endif // SdCard_h
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