| /* Arduino Sd2Card Library | |
| Copyright (C) 2009 by William Greiman | |
| This file is part of the Arduino Sd2Card Library | |
| This Library is free software: you can redistribute it and/or modify | |
| it under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| This Library is distributed in the hope that it will be useful, | |
| but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| GNU General Public License for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with the Arduino Sd2Card Library. If not, see | |
| <http://www.gnu.org/licenses/>. | |
| */ | |
| // Based on the document: | |
| // | |
| // SD Specifications | |
| // Part 1 | |
| // Physical Layer | |
| // Simplified Specification | |
| // Version 2.00 | |
| // September 25, 2006 | |
| // | |
| // www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf | |
| //------------------------------------------------------------------------------ | |
| // SD card commands | |
| /** GO_IDLE_STATE - init card in spi mode if CS low */ | |
| uint8_t const CMD0 = 0X00; | |
| /** SEND_IF_COND - verify SD Memory Card interface operating condition.*/ | |
| uint8_t const CMD8 = 0X08; | |
| /** SEND_CSD - read the Card Specific Data (CSD register) */ | |
| uint8_t const CMD9 = 0X09; | |
| /** SEND_CID - read the card identification information (CID register) */ | |
| uint8_t const CMD10 = 0X0A; | |
| /** SEND_STATUS - read the card status register */ | |
| uint8_t const CMD13 = 0X0D; | |
| /** READ_BLOCK - read a single data block from the card */ | |
| uint8_t const CMD17 = 0X11; | |
| /** WRITE_BLOCK - write a single data block to the card */ | |
| uint8_t const CMD24 = 0X18; | |
| /** WRITE_MULTIPLE_BLOCK - write blocks of data until a STOP_TRANSMISSION */ | |
| uint8_t const CMD25 = 0X19; | |
| /** ERASE_WR_BLK_START - sets the address of the first block to be erased */ | |
| uint8_t const CMD32 = 0X20; | |
| /** ERASE_WR_BLK_END - sets the address of the last block of the continuous | |
| range to be erased*/ | |
| uint8_t const CMD33 = 0X21; | |
| /** ERASE - erase all previously selected blocks */ | |
| uint8_t const CMD38 = 0X26; | |
| /** APP_CMD - escape for application specific command */ | |
| uint8_t const CMD55 = 0X37; | |
| /** READ_OCR - read the OCR register of a card */ | |
| uint8_t const CMD58 = 0X3A; | |
| /** SET_WR_BLK_ERASE_COUNT - Set the number of write blocks to be | |
| pre-erased before writing */ | |
| uint8_t const ACMD23 = 0X17; | |
| /** SD_SEND_OP_COMD - Sends host capacity support information and | |
| activates the card's initialization process */ | |
| uint8_t const ACMD41 = 0X29; | |
| //------------------------------------------------------------------------------ | |
| /** status for card in the ready state */ | |
| uint8_t const R1_READY_STATE = 0X00; | |
| /** status for card in the idle state */ | |
| uint8_t const R1_IDLE_STATE = 0X01; | |
| /** status bit for illegal command */ | |
| uint8_t const R1_ILLEGAL_COMMAND = 0X04; | |
| /** start data token for read or write single block*/ | |
| uint8_t const DATA_START_BLOCK = 0XFE; | |
| /** stop token for write multiple blocks*/ | |
| uint8_t const STOP_TRAN_TOKEN = 0XFD; | |
| /** start data token for write multiple blocks*/ | |
| uint8_t const WRITE_MULTIPLE_TOKEN = 0XFC; | |
| /** mask for data response tokens after a write block operation */ | |
| uint8_t const DATA_RES_MASK = 0X1F; | |
| /** write data accepted token */ | |
| uint8_t const DATA_RES_ACCEPTED = 0X05; | |
| //------------------------------------------------------------------------------ | |
| typedef struct CID { | |
| // byte 0 | |
| uint8_t mid; // Manufacturer ID | |
| // byte 1-2 | |
| char oid[2]; // OEM/Application ID | |
| // byte 3-7 | |
| char pnm[5]; // Product name | |
| // byte 8 | |
| unsigned prv_m : 4; // Product revision n.m | |
| unsigned prv_n : 4; | |
| // byte 9-12 | |
| uint32_t psn; // Product serial number | |
| // byte 13 | |
| unsigned mdt_year_high : 4; // Manufacturing date | |
| unsigned reserved : 4; | |
| // byte 14 | |
| unsigned mdt_month : 4; | |
| unsigned mdt_year_low : 4; | |
| // byte 15 | |
| unsigned always1 : 1; | |
| unsigned crc : 7; | |
| } cid_t; | |
| //------------------------------------------------------------------------------ | |
| // CSD for version 1.00 cards | |
| typedef struct CSDV1 { | |
| // byte 0 | |
| unsigned reserved1 : 6; | |
| unsigned csd_ver : 2; | |
| // byte 1 | |
| uint8_t taac; | |
| // byte 2 | |
| uint8_t nsac; | |
| // byte 3 | |
| uint8_t tran_speed; | |
| // byte 4 | |
| uint8_t ccc_high; | |
| // byte 5 | |
| unsigned read_bl_len : 4; | |
| unsigned ccc_low : 4; | |
| // byte 6 | |
| unsigned c_size_high : 2; | |
| unsigned reserved2 : 2; | |
| unsigned dsr_imp : 1; | |
| unsigned read_blk_misalign : 1; | |
| unsigned write_blk_misalign : 1; | |
| unsigned read_bl_partial : 1; | |
| // byte 7 | |
| uint8_t c_size_mid; | |
| // byte 8 | |
| unsigned vdd_r_curr_max : 3; | |
| unsigned vdd_r_curr_min : 3; | |
| unsigned c_size_low : 2; | |
| // byte 9 | |
| unsigned c_size_mult_high : 2; | |
| unsigned vdd_w_cur_max : 3; | |
| unsigned vdd_w_curr_min : 3; | |
| // byte 10 | |
| unsigned sector_size_high : 6; | |
| unsigned erase_blk_en : 1; | |
| unsigned c_size_mult_low : 1; | |
| // byte 11 | |
| unsigned wp_grp_size : 7; | |
| unsigned sector_size_low : 1; | |
| // byte 12 | |
| unsigned write_bl_len_high : 2; | |
| unsigned r2w_factor : 3; | |
| unsigned reserved3 : 2; | |
| unsigned wp_grp_enable : 1; | |
| // byte 13 | |
| unsigned reserved4 : 5; | |
| unsigned write_partial : 1; | |
| unsigned write_bl_len_low : 2; | |
| // byte 14 | |
| unsigned reserved5: 2; | |
| unsigned file_format : 2; | |
| unsigned tmp_write_protect : 1; | |
| unsigned perm_write_protect : 1; | |
| unsigned copy : 1; | |
| unsigned file_format_grp : 1; | |
| // byte 15 | |
| unsigned always1 : 1; | |
| unsigned crc : 7; | |
| } csd1_t; | |
| //------------------------------------------------------------------------------ | |
| // CSD for version 2.00 cards | |
| typedef struct CSDV2 { | |
| // byte 0 | |
| unsigned reserved1 : 6; | |
| unsigned csd_ver : 2; | |
| // byte 1 | |
| uint8_t taac; | |
| // byte 2 | |
| uint8_t nsac; | |
| // byte 3 | |
| uint8_t tran_speed; | |
| // byte 4 | |
| uint8_t ccc_high; | |
| // byte 5 | |
| unsigned read_bl_len : 4; | |
| unsigned ccc_low : 4; | |
| // byte 6 | |
| unsigned reserved2 : 4; | |
| unsigned dsr_imp : 1; | |
| unsigned read_blk_misalign : 1; | |
| unsigned write_blk_misalign : 1; | |
| unsigned read_bl_partial : 1; | |
| // byte 7 | |
| unsigned reserved3 : 2; | |
| unsigned c_size_high : 6; | |
| // byte 8 | |
| uint8_t c_size_mid; | |
| // byte 9 | |
| uint8_t c_size_low; | |
| // byte 10 | |
| unsigned sector_size_high : 6; | |
| unsigned erase_blk_en : 1; | |
| unsigned reserved4 : 1; | |
| // byte 11 | |
| unsigned wp_grp_size : 7; | |
| unsigned sector_size_low : 1; | |
| // byte 12 | |
| unsigned write_bl_len_high : 2; | |
| unsigned r2w_factor : 3; | |
| unsigned reserved5 : 2; | |
| unsigned wp_grp_enable : 1; | |
| // byte 13 | |
| unsigned reserved6 : 5; | |
| unsigned write_partial : 1; | |
| unsigned write_bl_len_low : 2; | |
| // byte 14 | |
| unsigned reserved7: 2; | |
| unsigned file_format : 2; | |
| unsigned tmp_write_protect : 1; | |
| unsigned perm_write_protect : 1; | |
| unsigned copy : 1; | |
| unsigned file_format_grp : 1; | |
| // byte 15 | |
| unsigned always1 : 1; | |
| unsigned crc : 7; | |
| } csd2_t; | |
| //------------------------------------------------------------------------------ | |
| // union of old and new style CSD register | |
| union csd_t { | |
| csd1_t v1; | |
| csd2_t v2; | |
| }; | |