276 lines
8.9 KiB
C
276 lines
8.9 KiB
C
/* Arduino Sd2Card Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino Sd2Card 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 Sd2Card Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef SdInfo_h
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#define SdInfo_h
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#include <stdint.h>
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// Based on the document:
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//
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// SD Specifications
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// Part 1
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// Physical Layer
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// Simplified Specification
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// Version 3.01
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// May 18, 2010
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//
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// http://www.sdcard.org/developers/tech/sdcard/pls/simplified_specs
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//------------------------------------------------------------------------------
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// SD card commands
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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_IF_COND - verify SD Memory Card interface operating condition.*/
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uint8_t const CMD8 = 0X08;
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/** SEND_CSD - read the Card Specific Data (CSD register) */
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uint8_t const CMD9 = 0X09;
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/** SEND_CID - read the card identification information (CID register) */
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uint8_t const CMD10 = 0X0A;
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/** STOP_TRANSMISSION - end multiple block read sequence */
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uint8_t const CMD12 = 0X0C;
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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_SINGLE_BLOCK - read a single data block from the card */
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uint8_t const CMD17 = 0X11;
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/** READ_MULTIPLE_BLOCK - read a multiple data blocks from the card */
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uint8_t const CMD18 = 0X12;
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/** WRITE_BLOCK - write a single data block to the card */
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uint8_t const CMD24 = 0X18;
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/** WRITE_MULTIPLE_BLOCK - write blocks of data until a STOP_TRANSMISSION */
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uint8_t const CMD25 = 0X19;
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/** ERASE_WR_BLK_START - sets the address of the first block to be erased */
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uint8_t const CMD32 = 0X20;
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/** ERASE_WR_BLK_END - sets the address of the last block of the continuous
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range to be erased*/
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uint8_t const CMD33 = 0X21;
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/** ERASE - erase all previously selected blocks */
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uint8_t const CMD38 = 0X26;
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/** APP_CMD - escape for application specific command */
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uint8_t const CMD55 = 0X37;
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/** READ_OCR - read the OCR register of a card */
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uint8_t const CMD58 = 0X3A;
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/** SET_WR_BLK_ERASE_COUNT - Set the number of write blocks to be
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pre-erased before writing */
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uint8_t const ACMD23 = 0X17;
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/** SD_SEND_OP_COMD - Sends host capacity support information and
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activates the card's initialization process */
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uint8_t const ACMD41 = 0X29;
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//------------------------------------------------------------------------------
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/** status for card in the ready state */
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uint8_t const R1_READY_STATE = 0X00;
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/** status for card in the idle state */
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uint8_t const R1_IDLE_STATE = 0X01;
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/** status bit for illegal command */
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uint8_t const R1_ILLEGAL_COMMAND = 0X04;
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/** start data token for read or write single block*/
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uint8_t const DATA_START_BLOCK = 0XFE;
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/** stop token for write multiple blocks*/
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uint8_t const STOP_TRAN_TOKEN = 0XFD;
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/** start data token for write multiple blocks*/
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uint8_t const WRITE_MULTIPLE_TOKEN = 0XFC;
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/** mask for data response tokens after a write block operation */
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uint8_t const DATA_RES_MASK = 0X1F;
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/** write data accepted token */
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uint8_t const DATA_RES_ACCEPTED = 0X05;
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//------------------------------------------------------------------------------
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/** Card IDentification (CID) register */
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typedef struct CID {
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// byte 0
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/** Manufacturer ID */
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unsigned char mid;
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// byte 1-2
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/** OEM/Application ID */
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char oid[2];
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// byte 3-7
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/** Product name */
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char pnm[5];
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// byte 8
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/** Product revision least significant digit */
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unsigned char prv_m : 4;
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/** Product revision most significant digit */
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unsigned char prv_n : 4;
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// byte 9-12
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/** Product serial number */
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uint32_t psn;
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// byte 13
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/** Manufacturing date year low digit */
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unsigned char mdt_year_high : 4;
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/** not used */
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unsigned char reserved : 4;
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// byte 14
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/** Manufacturing date month */
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unsigned char mdt_month : 4;
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/** Manufacturing date year low digit */
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unsigned char mdt_year_low :4;
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// byte 15
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/** not used always 1 */
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unsigned char always1 : 1;
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/** CRC7 checksum */
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unsigned char crc : 7;
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}cid_t;
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//------------------------------------------------------------------------------
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/** CSD for version 1.00 cards */
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typedef struct CSDV1 {
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// byte 0
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unsigned char reserved1 : 6;
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unsigned char csd_ver : 2;
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// byte 1
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unsigned char taac;
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// byte 2
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unsigned char nsac;
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// byte 3
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unsigned char tran_speed;
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// byte 4
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unsigned char ccc_high;
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// byte 5
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unsigned char read_bl_len : 4;
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unsigned char ccc_low : 4;
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// byte 6
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unsigned char c_size_high : 2;
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unsigned char reserved2 : 2;
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unsigned char dsr_imp : 1;
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unsigned char read_blk_misalign :1;
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unsigned char write_blk_misalign : 1;
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unsigned char read_bl_partial : 1;
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// byte 7
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unsigned char c_size_mid;
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// byte 8
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unsigned char vdd_r_curr_max : 3;
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unsigned char vdd_r_curr_min : 3;
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unsigned char c_size_low :2;
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// byte 9
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unsigned char c_size_mult_high : 2;
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unsigned char vdd_w_cur_max : 3;
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unsigned char vdd_w_curr_min : 3;
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// byte 10
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unsigned char sector_size_high : 6;
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unsigned char erase_blk_en : 1;
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unsigned char c_size_mult_low : 1;
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// byte 11
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unsigned char wp_grp_size : 7;
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unsigned char sector_size_low : 1;
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// byte 12
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unsigned char write_bl_len_high : 2;
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unsigned char r2w_factor : 3;
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unsigned char reserved3 : 2;
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unsigned char wp_grp_enable : 1;
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// byte 13
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unsigned char reserved4 : 5;
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unsigned char write_partial : 1;
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unsigned char write_bl_len_low : 2;
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// byte 14
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unsigned char reserved5: 2;
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unsigned char file_format : 2;
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unsigned char tmp_write_protect : 1;
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unsigned char perm_write_protect : 1;
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unsigned char copy : 1;
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/** Indicates the file format on the card */
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unsigned char file_format_grp : 1;
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// byte 15
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unsigned char always1 : 1;
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unsigned char crc : 7;
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}csd1_t;
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//------------------------------------------------------------------------------
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/** CSD for version 2.00 cards */
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typedef struct CSDV2 {
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// byte 0
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unsigned char reserved1 : 6;
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unsigned char csd_ver : 2;
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// byte 1
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/** fixed to 0X0E */
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unsigned char taac;
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// byte 2
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/** fixed to 0 */
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unsigned char nsac;
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// byte 3
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unsigned char tran_speed;
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// byte 4
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unsigned char ccc_high;
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// byte 5
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/** This field is fixed to 9h, which indicates READ_BL_LEN=512 Byte */
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unsigned char read_bl_len : 4;
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unsigned char ccc_low : 4;
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// byte 6
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/** not used */
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unsigned char reserved2 : 4;
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unsigned char dsr_imp : 1;
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/** fixed to 0 */
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unsigned char read_blk_misalign :1;
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/** fixed to 0 */
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unsigned char write_blk_misalign : 1;
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/** fixed to 0 - no partial read */
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unsigned char read_bl_partial : 1;
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// byte 7
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/** not used */
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unsigned char reserved3 : 2;
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/** high part of card size */
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unsigned char c_size_high : 6;
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// byte 8
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/** middle part of card size */
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unsigned char c_size_mid;
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// byte 9
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/** low part of card size */
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unsigned char c_size_low;
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// byte 10
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/** sector size is fixed at 64 KB */
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unsigned char sector_size_high : 6;
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/** fixed to 1 - erase single is supported */
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unsigned char erase_blk_en : 1;
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/** not used */
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unsigned char reserved4 : 1;
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// byte 11
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unsigned char wp_grp_size : 7;
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/** sector size is fixed at 64 KB */
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unsigned char sector_size_low : 1;
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// byte 12
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/** write_bl_len fixed for 512 byte blocks */
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unsigned char write_bl_len_high : 2;
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/** fixed value of 2 */
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unsigned char r2w_factor : 3;
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/** not used */
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unsigned char reserved5 : 2;
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/** fixed value of 0 - no write protect groups */
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unsigned char wp_grp_enable : 1;
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// byte 13
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unsigned char reserved6 : 5;
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/** always zero - no partial block read*/
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unsigned char write_partial : 1;
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/** write_bl_len fixed for 512 byte blocks */
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unsigned char write_bl_len_low : 2;
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// byte 14
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unsigned char reserved7: 2;
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/** Do not use always 0 */
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unsigned char file_format : 2;
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unsigned char tmp_write_protect : 1;
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unsigned char perm_write_protect : 1;
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unsigned char copy : 1;
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/** Do not use always 0 */
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unsigned char file_format_grp : 1;
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// byte 15
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/** not used always 1 */
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unsigned char always1 : 1;
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/** checksum */
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unsigned char crc : 7;
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}csd2_t;
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//------------------------------------------------------------------------------
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/** union of old and new style CSD register */
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union csd_t {
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csd1_t v1;
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csd2_t v2;
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};
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#endif // SdInfo_h
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