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teensy-sd/utility/SdInfo.h

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  1. /* Arduino Sd2Card Library

  2.  * Copyright (C) 2009 by William Greiman

  3.  *

  4.  * This file is part of the Arduino Sd2Card Library

  5.  *

  6.  * This Library is free software: you can redistribute it and/or modify

  7.  * it under the terms of the GNU General Public License as published by

  8.  * the Free Software Foundation, either version 3 of the License, or

  9.  * (at your option) any later version.

  10.  *

  11.  * This Library is distributed in the hope that it will be useful,

  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  14.  * GNU General Public License for more details.

  15.  *

  16.  * You should have received a copy of the GNU General Public License

  17.  * along with the Arduino Sd2Card Library.  If not, see

  18.  * <http://www.gnu.org/licenses/>.

  19.  */

  20. #ifndef SdInfo_h

  21. #define SdInfo_h

  22. #include <stdint.h>

  23. // Based on the document:

  24. //

  25. // SD Specifications

  26. // Part 1

  27. // Physical Layer

  28. // Simplified Specification

  29. // Version 2.00

  30. // September 25, 2006

  31. //

  32. // www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf

  33. //------------------------------------------------------------------------------

  34. // SD card commands

  35. /** GO_IDLE_STATE - init card in spi mode if CS low */

  36. uint8_t const CMD0 = 0X00;

  37. /** SEND_IF_COND - verify SD Memory Card interface operating condition.*/

  38. uint8_t const CMD8 = 0X08;

  39. /** SEND_CSD - read the Card Specific Data (CSD register) */

  40. uint8_t const CMD9 = 0X09;

  41. /** SEND_CID - read the card identification information (CID register) */

  42. uint8_t const CMD10 = 0X0A;

  43. /** SEND_STATUS - read the card status register */

  44. uint8_t const CMD13 = 0X0D;

  45. /** READ_BLOCK - read a single data block from the card */

  46. uint8_t const CMD17 = 0X11;

  47. /** WRITE_BLOCK - write a single data block to the card */

  48. uint8_t const CMD24 = 0X18;

  49. /** WRITE_MULTIPLE_BLOCK - write blocks of data until a STOP_TRANSMISSION */

  50. uint8_t const CMD25 = 0X19;

  51. /** ERASE_WR_BLK_START - sets the address of the first block to be erased */

  52. uint8_t const CMD32 = 0X20;

  53. /** ERASE_WR_BLK_END - sets the address of the last block of the continuous

  54.     range to be erased*/

  55. uint8_t const CMD33 = 0X21;

  56. /** ERASE - erase all previously selected blocks */

  57. uint8_t const CMD38 = 0X26;

  58. /** APP_CMD - escape for application specific command */

  59. uint8_t const CMD55 = 0X37;

  60. /** READ_OCR - read the OCR register of a card */

  61. uint8_t const CMD58 = 0X3A;

  62. /** SET_WR_BLK_ERASE_COUNT - Set the number of write blocks to be

  63.      pre-erased before writing */

  64. uint8_t const ACMD23 = 0X17;

  65. /** SD_SEND_OP_COMD - Sends host capacity support information and

  66.     activates the card's initialization process */

  67. uint8_t const ACMD41 = 0X29;

  68. //------------------------------------------------------------------------------

  69. /** status for card in the ready state */

  70. uint8_t const R1_READY_STATE = 0X00;

  71. /** status for card in the idle state */

  72. uint8_t const R1_IDLE_STATE = 0X01;

  73. /** status bit for illegal command */

  74. uint8_t const R1_ILLEGAL_COMMAND = 0X04;

  75. /** start data token for read or write single block*/

  76. uint8_t const DATA_START_BLOCK = 0XFE;

  77. /** stop token for write multiple blocks*/

  78. uint8_t const STOP_TRAN_TOKEN = 0XFD;

  79. /** start data token for write multiple blocks*/

  80. uint8_t const WRITE_MULTIPLE_TOKEN = 0XFC;

  81. /** mask for data response tokens after a write block operation */

  82. uint8_t const DATA_RES_MASK = 0X1F;

  83. /** write data accepted token */

  84. uint8_t const DATA_RES_ACCEPTED = 0X05;

  85. //------------------------------------------------------------------------------

  86. typedef struct CID {

  87.   // byte 0

  88.   uint8_t mid;  // Manufacturer ID

  89.   // byte 1-2

  90.   char oid[2];  // OEM/Application ID

  91.   // byte 3-7

  92.   char pnm[5];  // Product name

  93.   // byte 8

  94.   unsigned prv_m : 4;  // Product revision n.m

  95.   unsigned prv_n : 4;

  96.   // byte 9-12

  97.   uint32_t psn;  // Product serial number

  98.   // byte 13

  99.   unsigned mdt_year_high : 4;  // Manufacturing date

  100.   unsigned reserved : 4;

  101.   // byte 14

  102.   unsigned mdt_month : 4;

  103.   unsigned mdt_year_low :4;

  104.   // byte 15

  105.   unsigned always1 : 1;

  106.   unsigned crc : 7;

  107. }cid_t;

  108. //------------------------------------------------------------------------------

  109. // CSD for version 1.00 cards

  110. typedef struct CSDV1 {

  111.   // byte 0

  112.   unsigned reserved1 : 6;

  113.   unsigned csd_ver : 2;

  114.   // byte 1

  115.   uint8_t taac;

  116.   // byte 2

  117.   uint8_t nsac;

  118.   // byte 3

  119.   uint8_t tran_speed;

  120.   // byte 4

  121.   uint8_t ccc_high;

  122.   // byte 5

  123.   unsigned read_bl_len : 4;

  124.   unsigned ccc_low : 4;

  125.   // byte 6

  126.   unsigned c_size_high : 2;

  127.   unsigned reserved2 : 2;

  128.   unsigned dsr_imp : 1;

  129.   unsigned read_blk_misalign :1;

  130.   unsigned write_blk_misalign : 1;

  131.   unsigned read_bl_partial : 1;

  132.   // byte 7

  133.   uint8_t c_size_mid;

  134.   // byte 8

  135.   unsigned vdd_r_curr_max : 3;

  136.   unsigned vdd_r_curr_min : 3;

  137.   unsigned c_size_low :2;

  138.   // byte 9

  139.   unsigned c_size_mult_high : 2;

  140.   unsigned vdd_w_cur_max : 3;

  141.   unsigned vdd_w_curr_min : 3;

  142.   // byte 10

  143.   unsigned sector_size_high : 6;

  144.   unsigned erase_blk_en : 1;

  145.   unsigned c_size_mult_low : 1;

  146.   // byte 11

  147.   unsigned wp_grp_size : 7;

  148.   unsigned sector_size_low : 1;

  149.   // byte 12

  150.   unsigned write_bl_len_high : 2;

  151.   unsigned r2w_factor : 3;

  152.   unsigned reserved3 : 2;

  153.   unsigned wp_grp_enable : 1;

  154.   // byte 13

  155.   unsigned reserved4 : 5;

  156.   unsigned write_partial : 1;

  157.   unsigned write_bl_len_low : 2;

  158.   // byte 14

  159.   unsigned reserved5: 2;

  160.   unsigned file_format : 2;

  161.   unsigned tmp_write_protect : 1;

  162.   unsigned perm_write_protect : 1;

  163.   unsigned copy : 1;

  164.   unsigned file_format_grp : 1;

  165.   // byte 15

  166.   unsigned always1 : 1;

  167.   unsigned crc : 7;

  168. }csd1_t;

  169. //------------------------------------------------------------------------------

  170. // CSD for version 2.00 cards

  171. typedef struct CSDV2 {

  172.   // byte 0

  173.   unsigned reserved1 : 6;

  174.   unsigned csd_ver : 2;

  175.   // byte 1

  176.   uint8_t taac;

  177.   // byte 2

  178.   uint8_t nsac;

  179.   // byte 3

  180.   uint8_t tran_speed;

  181.   // byte 4

  182.   uint8_t ccc_high;

  183.   // byte 5

  184.   unsigned read_bl_len : 4;

  185.   unsigned ccc_low : 4;

  186.   // byte 6

  187.   unsigned reserved2 : 4;

  188.   unsigned dsr_imp : 1;

  189.   unsigned read_blk_misalign :1;

  190.   unsigned write_blk_misalign : 1;

  191.   unsigned read_bl_partial : 1;

  192.   // byte 7

  193.   unsigned reserved3 : 2;

  194.   unsigned c_size_high : 6;

  195.   // byte 8

  196.   uint8_t c_size_mid;

  197.   // byte 9

  198.   uint8_t c_size_low;

  199.   // byte 10

  200.   unsigned sector_size_high : 6;

  201.   unsigned erase_blk_en : 1;

  202.   unsigned reserved4 : 1;

  203.   // byte 11

  204.   unsigned wp_grp_size : 7;

  205.   unsigned sector_size_low : 1;

  206.   // byte 12

  207.   unsigned write_bl_len_high : 2;

  208.   unsigned r2w_factor : 3;

  209.   unsigned reserved5 : 2;

  210.   unsigned wp_grp_enable : 1;

  211.   // byte 13

  212.   unsigned reserved6 : 5;

  213.   unsigned write_partial : 1;

  214.   unsigned write_bl_len_low : 2;

  215.   // byte 14

  216.   unsigned reserved7: 2;

  217.   unsigned file_format : 2;

  218.   unsigned tmp_write_protect : 1;

  219.   unsigned perm_write_protect : 1;

  220.   unsigned copy : 1;

  221.   unsigned file_format_grp : 1;

  222.   // byte 15

  223.   unsigned always1 : 1;

  224.   unsigned crc : 7;

  225. }csd2_t;

  226. //------------------------------------------------------------------------------

  227. // union of old and new style CSD register

  228. union csd_t {

  229.   csd1_t v1;

  230.   csd2_t v2;

  231. };

  232. #endif  // SdInfo_h