Yuji Notsu
/
QVGA_TFT_test
This is test program for running 192GC00(240 x 320 dot, 65K Color TFT LCD module ) on Star Board Orange.
SDHCFileSystem.cpp@0:0e2aded4edb0, 2011-01-21 (annotated)
- Committer:
- y_notsu
- Date:
- Fri Jan 21 12:51:26 2011 +0000
- Revision:
- 0:0e2aded4edb0
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
y_notsu | 0:0e2aded4edb0 | 1 | /* mbed SDFileSystem Library, for providing file access to SD cards |
y_notsu | 0:0e2aded4edb0 | 2 | * Copyright (c) 2008-2010, sford |
y_notsu | 0:0e2aded4edb0 | 3 | * |
y_notsu | 0:0e2aded4edb0 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
y_notsu | 0:0e2aded4edb0 | 5 | * of this software and associated documentation files (the "Software"), to deal |
y_notsu | 0:0e2aded4edb0 | 6 | * in the Software without restriction, including without limitation the rights |
y_notsu | 0:0e2aded4edb0 | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
y_notsu | 0:0e2aded4edb0 | 8 | * copies of the Software, and to permit persons to whom the Software is |
y_notsu | 0:0e2aded4edb0 | 9 | * furnished to do so, subject to the following conditions: |
y_notsu | 0:0e2aded4edb0 | 10 | * |
y_notsu | 0:0e2aded4edb0 | 11 | * The above copyright notice and this permission notice shall be included in |
y_notsu | 0:0e2aded4edb0 | 12 | * all copies or substantial portions of the Software. |
y_notsu | 0:0e2aded4edb0 | 13 | * |
y_notsu | 0:0e2aded4edb0 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
y_notsu | 0:0e2aded4edb0 | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
y_notsu | 0:0e2aded4edb0 | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
y_notsu | 0:0e2aded4edb0 | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
y_notsu | 0:0e2aded4edb0 | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
y_notsu | 0:0e2aded4edb0 | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
y_notsu | 0:0e2aded4edb0 | 20 | * THE SOFTWARE. |
y_notsu | 0:0e2aded4edb0 | 21 | */ |
y_notsu | 0:0e2aded4edb0 | 22 | |
y_notsu | 0:0e2aded4edb0 | 23 | //* Introduction |
y_notsu | 0:0e2aded4edb0 | 24 | // * ------------ |
y_notsu | 0:0e2aded4edb0 | 25 | // * SD and MMC cards support a number of interfaces, but common to them all |
y_notsu | 0:0e2aded4edb0 | 26 | // * is one based on SPI. This is the one I'm implmenting because it means |
y_notsu | 0:0e2aded4edb0 | 27 | // * it is much more portable even though not so performant, and we already |
y_notsu | 0:0e2aded4edb0 | 28 | // * have the mbed SPI Interface! |
y_notsu | 0:0e2aded4edb0 | 29 | // * |
y_notsu | 0:0e2aded4edb0 | 30 | // * The main reference I'm using is Chapter 7, "SPI Mode" of: |
y_notsu | 0:0e2aded4edb0 | 31 | // * http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf |
y_notsu | 0:0e2aded4edb0 | 32 | // * |
y_notsu | 0:0e2aded4edb0 | 33 | // * SPI Startup |
y_notsu | 0:0e2aded4edb0 | 34 | // * ----------- |
y_notsu | 0:0e2aded4edb0 | 35 | // * The SD card powers up in SD mode. The SPI interface mode is selected by |
y_notsu | 0:0e2aded4edb0 | 36 | // * asserting CS low and sending the reset command (CMD0). The card will |
y_notsu | 0:0e2aded4edb0 | 37 | // * respond with a (R1) response. |
y_notsu | 0:0e2aded4edb0 | 38 | // * |
y_notsu | 0:0e2aded4edb0 | 39 | // * CMD8 is optionally sent to determine the voltage range supported, and |
y_notsu | 0:0e2aded4edb0 | 40 | // * indirectly determine whether it is a version 1.x SD/non-SD card or |
y_notsu | 0:0e2aded4edb0 | 41 | // * version 2.x. I'll just ignore this for now. |
y_notsu | 0:0e2aded4edb0 | 42 | // * |
y_notsu | 0:0e2aded4edb0 | 43 | // * ACMD41 is repeatedly issued to initialise the card, until "in idle" |
y_notsu | 0:0e2aded4edb0 | 44 | // * (bit 0) of the R1 response goes to '0', indicating it is initialised. |
y_notsu | 0:0e2aded4edb0 | 45 | // * |
y_notsu | 0:0e2aded4edb0 | 46 | // * You should also indicate whether the host supports High Capicity cards, |
y_notsu | 0:0e2aded4edb0 | 47 | // * and check whether the card is high capacity - i'll also ignore this |
y_notsu | 0:0e2aded4edb0 | 48 | // * |
y_notsu | 0:0e2aded4edb0 | 49 | // * SPI Protocol |
y_notsu | 0:0e2aded4edb0 | 50 | // * ------------ |
y_notsu | 0:0e2aded4edb0 | 51 | // * The SD SPI protocol is based on transactions made up of 8-bit words, with |
y_notsu | 0:0e2aded4edb0 | 52 | //* the host starting every bus transaction by asserting the CS signal low. The |
y_notsu | 0:0e2aded4edb0 | 53 | // * card always responds to commands, data blocks and errors. |
y_notsu | 0:0e2aded4edb0 | 54 | // * |
y_notsu | 0:0e2aded4edb0 | 55 | // * The protocol supports a CRC, but by default it is off (except for the |
y_notsu | 0:0e2aded4edb0 | 56 | // * first reset CMD0, where the CRC can just be pre-calculated, and CMD8) |
y_notsu | 0:0e2aded4edb0 | 57 | // * I'll leave the CRC off I think! |
y_notsu | 0:0e2aded4edb0 | 58 | // * |
y_notsu | 0:0e2aded4edb0 | 59 | // * Standard capacity cards have variable data block sizes, whereas High |
y_notsu | 0:0e2aded4edb0 | 60 | // * Capacity cards fix the size of data block to 512 bytes. I'll therefore |
y_notsu | 0:0e2aded4edb0 | 61 | // * just always use the Standard Capacity cards with a block size of 512 bytes. |
y_notsu | 0:0e2aded4edb0 | 62 | // * This is set with CMD16. |
y_notsu | 0:0e2aded4edb0 | 63 | // * |
y_notsu | 0:0e2aded4edb0 | 64 | // * You can read and write single blocks (CMD17, CMD25) or multiple blocks |
y_notsu | 0:0e2aded4edb0 | 65 | // * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When |
y_notsu | 0:0e2aded4edb0 | 66 | // * the card gets a read command, it responds with a response token, and then |
y_notsu | 0:0e2aded4edb0 | 67 | // * a data token or an error. |
y_notsu | 0:0e2aded4edb0 | 68 | // * |
y_notsu | 0:0e2aded4edb0 | 69 | // * SPI Command Format |
y_notsu | 0:0e2aded4edb0 | 70 | // * ------------------ |
y_notsu | 0:0e2aded4edb0 | 71 | // * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC. |
y_notsu | 0:0e2aded4edb0 | 72 | // * |
y_notsu | 0:0e2aded4edb0 | 73 | // * +---------------+------------+------------+-----------+----------+--------------+ |
y_notsu | 0:0e2aded4edb0 | 74 | // * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 | |
y_notsu | 0:0e2aded4edb0 | 75 | // * +---------------+------------+------------+-----------+----------+--------------+ |
y_notsu | 0:0e2aded4edb0 | 76 | // * |
y_notsu | 0:0e2aded4edb0 | 77 | // * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95) |
y_notsu | 0:0e2aded4edb0 | 78 | // * |
y_notsu | 0:0e2aded4edb0 | 79 | // * All Application Specific commands shall be preceded with APP_CMD (CMD55). |
y_notsu | 0:0e2aded4edb0 | 80 | // * |
y_notsu | 0:0e2aded4edb0 | 81 | // * SPI Response Format |
y_notsu | 0:0e2aded4edb0 | 82 | // * ------------------- |
y_notsu | 0:0e2aded4edb0 | 83 | // * The main response format (R1) is a status byte (normally zero). Key flags: |
y_notsu | 0:0e2aded4edb0 | 84 | // * idle - 1 if the card is in an idle state/initialising |
y_notsu | 0:0e2aded4edb0 | 85 | // * cmd - 1 if an illegal command code was detected |
y_notsu | 0:0e2aded4edb0 | 86 | // * |
y_notsu | 0:0e2aded4edb0 | 87 | // * +-------------------------------------------------+ |
y_notsu | 0:0e2aded4edb0 | 88 | // * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle | |
y_notsu | 0:0e2aded4edb0 | 89 | // * +-------------------------------------------------+ |
y_notsu | 0:0e2aded4edb0 | 90 | // * |
y_notsu | 0:0e2aded4edb0 | 91 | // * R1b is the same, except it is followed by a busy signal (zeros) until |
y_notsu | 0:0e2aded4edb0 | 92 | // * the first non-zero byte when it is ready again. |
y_notsu | 0:0e2aded4edb0 | 93 | // * |
y_notsu | 0:0e2aded4edb0 | 94 | // * Data Response Token |
y_notsu | 0:0e2aded4edb0 | 95 | // * ------------------- |
y_notsu | 0:0e2aded4edb0 | 96 | // * Every data block written to the card is acknowledged by a byte |
y_notsu | 0:0e2aded4edb0 | 97 | // * response token |
y_notsu | 0:0e2aded4edb0 | 98 | // * |
y_notsu | 0:0e2aded4edb0 | 99 | // * +----------------------+ |
y_notsu | 0:0e2aded4edb0 | 100 | // * | xxx | 0 | status | 1 | |
y_notsu | 0:0e2aded4edb0 | 101 | // * +----------------------+ |
y_notsu | 0:0e2aded4edb0 | 102 | // * 010 - OK! |
y_notsu | 0:0e2aded4edb0 | 103 | // * 101 - CRC Error |
y_notsu | 0:0e2aded4edb0 | 104 | // * 110 - Write Error |
y_notsu | 0:0e2aded4edb0 | 105 | // * |
y_notsu | 0:0e2aded4edb0 | 106 | // * Single Block Read and Write |
y_notsu | 0:0e2aded4edb0 | 107 | // * --------------------------- |
y_notsu | 0:0e2aded4edb0 | 108 | // * |
y_notsu | 0:0e2aded4edb0 | 109 | // * Block transfers have a byte header, followed by the data, followed |
y_notsu | 0:0e2aded4edb0 | 110 | // * by a 16-bit CRC. In our case, the data will always be 512 bytes. |
y_notsu | 0:0e2aded4edb0 | 111 | // * |
y_notsu | 0:0e2aded4edb0 | 112 | // * +------+---------+---------+- - - -+---------+-----------+----------+ |
y_notsu | 0:0e2aded4edb0 | 113 | // * | 0xFE | data[0] | data[1] | | data[n] | crc[15:8] | crc[7:0] | |
y_notsu | 0:0e2aded4edb0 | 114 | // * +------+---------+---------+- - - -+---------+-----------+----------+ |
y_notsu | 0:0e2aded4edb0 | 115 | // */ |
y_notsu | 0:0e2aded4edb0 | 116 | // |
y_notsu | 0:0e2aded4edb0 | 117 | //* |
y_notsu | 0:0e2aded4edb0 | 118 | // * Comment: Changes for SDHC support till 32GB |
y_notsu | 0:0e2aded4edb0 | 119 | // * Name: KB |
y_notsu | 0:0e2aded4edb0 | 120 | // * Date: 07/24/2010 |
y_notsu | 0:0e2aded4edb0 | 121 | // * Release: 0.1 |
y_notsu | 0:0e2aded4edb0 | 122 | // */ |
y_notsu | 0:0e2aded4edb0 | 123 | |
y_notsu | 0:0e2aded4edb0 | 124 | /* mbed SDFileSystem Library, for providing file access to SD cards |
y_notsu | 0:0e2aded4edb0 | 125 | * Copyright (c) 2008-2010, sford |
y_notsu | 0:0e2aded4edb0 | 126 | * |
y_notsu | 0:0e2aded4edb0 | 127 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
y_notsu | 0:0e2aded4edb0 | 128 | * of this software and associated documentation files (the "Software"), to deal |
y_notsu | 0:0e2aded4edb0 | 129 | * in the Software without restriction, including without limitation the rights |
y_notsu | 0:0e2aded4edb0 | 130 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
y_notsu | 0:0e2aded4edb0 | 131 | * copies of the Software, and to permit persons to whom the Software is |
y_notsu | 0:0e2aded4edb0 | 132 | * furnished to do so, subject to the following conditions: |
y_notsu | 0:0e2aded4edb0 | 133 | * |
y_notsu | 0:0e2aded4edb0 | 134 | * The above copyright notice and this permission notice shall be included in |
y_notsu | 0:0e2aded4edb0 | 135 | * all copies or substantial portions of the Software. |
y_notsu | 0:0e2aded4edb0 | 136 | * |
y_notsu | 0:0e2aded4edb0 | 137 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
y_notsu | 0:0e2aded4edb0 | 138 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
y_notsu | 0:0e2aded4edb0 | 139 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
y_notsu | 0:0e2aded4edb0 | 140 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
y_notsu | 0:0e2aded4edb0 | 141 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
y_notsu | 0:0e2aded4edb0 | 142 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
y_notsu | 0:0e2aded4edb0 | 143 | * THE SOFTWARE. |
y_notsu | 0:0e2aded4edb0 | 144 | */ |
y_notsu | 0:0e2aded4edb0 | 145 | |
y_notsu | 0:0e2aded4edb0 | 146 | //* Introduction |
y_notsu | 0:0e2aded4edb0 | 147 | // * ------------ |
y_notsu | 0:0e2aded4edb0 | 148 | // * SD and MMC cards support a number of interfaces, but common to them all |
y_notsu | 0:0e2aded4edb0 | 149 | // * is one based on SPI. This is the one I'm implmenting because it means |
y_notsu | 0:0e2aded4edb0 | 150 | // * it is much more portable even though not so performant, and we already |
y_notsu | 0:0e2aded4edb0 | 151 | // * have the mbed SPI Interface! |
y_notsu | 0:0e2aded4edb0 | 152 | // * |
y_notsu | 0:0e2aded4edb0 | 153 | // * The main reference I'm using is Chapter 7, "SPI Mode" of: |
y_notsu | 0:0e2aded4edb0 | 154 | // * http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf |
y_notsu | 0:0e2aded4edb0 | 155 | // * |
y_notsu | 0:0e2aded4edb0 | 156 | // * SPI Startup |
y_notsu | 0:0e2aded4edb0 | 157 | // * ----------- |
y_notsu | 0:0e2aded4edb0 | 158 | // * The SD card powers up in SD mode. The SPI interface mode is selected by |
y_notsu | 0:0e2aded4edb0 | 159 | // * asserting CS low and sending the reset command (CMD0). The card will |
y_notsu | 0:0e2aded4edb0 | 160 | // * respond with a (R1) response. |
y_notsu | 0:0e2aded4edb0 | 161 | // * |
y_notsu | 0:0e2aded4edb0 | 162 | // * CMD8 is optionally sent to determine the voltage range supported, and |
y_notsu | 0:0e2aded4edb0 | 163 | // * indirectly determine whether it is a version 1.x SD/non-SD card or |
y_notsu | 0:0e2aded4edb0 | 164 | // * version 2.x. I'll just ignore this for now. |
y_notsu | 0:0e2aded4edb0 | 165 | // * |
y_notsu | 0:0e2aded4edb0 | 166 | // * ACMD41 is repeatedly issued to initialise the card, until "in idle" |
y_notsu | 0:0e2aded4edb0 | 167 | // * (bit 0) of the R1 response goes to '0', indicating it is initialised. |
y_notsu | 0:0e2aded4edb0 | 168 | // * |
y_notsu | 0:0e2aded4edb0 | 169 | // * You should also indicate whether the host supports High Capicity cards, |
y_notsu | 0:0e2aded4edb0 | 170 | // * and check whether the card is high capacity - i'll also ignore this |
y_notsu | 0:0e2aded4edb0 | 171 | // * |
y_notsu | 0:0e2aded4edb0 | 172 | // * SPI Protocol |
y_notsu | 0:0e2aded4edb0 | 173 | // * ------------ |
y_notsu | 0:0e2aded4edb0 | 174 | // * The SD SPI protocol is based on transactions made up of 8-bit words, with |
y_notsu | 0:0e2aded4edb0 | 175 | //* the host starting every bus transaction by asserting the CS signal low. The |
y_notsu | 0:0e2aded4edb0 | 176 | // * card always responds to commands, data blocks and errors. |
y_notsu | 0:0e2aded4edb0 | 177 | // * |
y_notsu | 0:0e2aded4edb0 | 178 | // * The protocol supports a CRC, but by default it is off (except for the |
y_notsu | 0:0e2aded4edb0 | 179 | // * first reset CMD0, where the CRC can just be pre-calculated, and CMD8) |
y_notsu | 0:0e2aded4edb0 | 180 | // * I'll leave the CRC off I think! |
y_notsu | 0:0e2aded4edb0 | 181 | // * |
y_notsu | 0:0e2aded4edb0 | 182 | // * Standard capacity cards have variable data block sizes, whereas High |
y_notsu | 0:0e2aded4edb0 | 183 | // * Capacity cards fix the size of data block to 512 bytes. I'll therefore |
y_notsu | 0:0e2aded4edb0 | 184 | // * just always use the Standard Capacity cards with a block size of 512 bytes. |
y_notsu | 0:0e2aded4edb0 | 185 | // * This is set with CMD16. |
y_notsu | 0:0e2aded4edb0 | 186 | // * |
y_notsu | 0:0e2aded4edb0 | 187 | // * You can read and write single blocks (CMD17, CMD25) or multiple blocks |
y_notsu | 0:0e2aded4edb0 | 188 | // * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When |
y_notsu | 0:0e2aded4edb0 | 189 | // * the card gets a read command, it responds with a response token, and then |
y_notsu | 0:0e2aded4edb0 | 190 | // * a data token or an error. |
y_notsu | 0:0e2aded4edb0 | 191 | // * |
y_notsu | 0:0e2aded4edb0 | 192 | // * SPI Command Format |
y_notsu | 0:0e2aded4edb0 | 193 | // * ------------------ |
y_notsu | 0:0e2aded4edb0 | 194 | // * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC. |
y_notsu | 0:0e2aded4edb0 | 195 | // * |
y_notsu | 0:0e2aded4edb0 | 196 | // * +---------------+------------+------------+-----------+----------+--------------+ |
y_notsu | 0:0e2aded4edb0 | 197 | // * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 | |
y_notsu | 0:0e2aded4edb0 | 198 | // * +---------------+------------+------------+-----------+----------+--------------+ |
y_notsu | 0:0e2aded4edb0 | 199 | // * |
y_notsu | 0:0e2aded4edb0 | 200 | // * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95) |
y_notsu | 0:0e2aded4edb0 | 201 | // * |
y_notsu | 0:0e2aded4edb0 | 202 | // * All Application Specific commands shall be preceded with APP_CMD (CMD55). |
y_notsu | 0:0e2aded4edb0 | 203 | // * |
y_notsu | 0:0e2aded4edb0 | 204 | // * SPI Response Format |
y_notsu | 0:0e2aded4edb0 | 205 | // * ------------------- |
y_notsu | 0:0e2aded4edb0 | 206 | // * The main response format (R1) is a status byte (normally zero). Key flags: |
y_notsu | 0:0e2aded4edb0 | 207 | // * idle - 1 if the card is in an idle state/initialising |
y_notsu | 0:0e2aded4edb0 | 208 | // * cmd - 1 if an illegal command code was detected |
y_notsu | 0:0e2aded4edb0 | 209 | // * |
y_notsu | 0:0e2aded4edb0 | 210 | // * +-------------------------------------------------+ |
y_notsu | 0:0e2aded4edb0 | 211 | // * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle | |
y_notsu | 0:0e2aded4edb0 | 212 | // * +-------------------------------------------------+ |
y_notsu | 0:0e2aded4edb0 | 213 | // * |
y_notsu | 0:0e2aded4edb0 | 214 | // * R1b is the same, except it is followed by a busy signal (zeros) until |
y_notsu | 0:0e2aded4edb0 | 215 | // * the first non-zero byte when it is ready again. |
y_notsu | 0:0e2aded4edb0 | 216 | // * |
y_notsu | 0:0e2aded4edb0 | 217 | // * Data Response Token |
y_notsu | 0:0e2aded4edb0 | 218 | // * ------------------- |
y_notsu | 0:0e2aded4edb0 | 219 | // * Every data block written to the card is acknowledged by a byte |
y_notsu | 0:0e2aded4edb0 | 220 | // * response token |
y_notsu | 0:0e2aded4edb0 | 221 | // * |
y_notsu | 0:0e2aded4edb0 | 222 | // * +----------------------+ |
y_notsu | 0:0e2aded4edb0 | 223 | // * | xxx | 0 | status | 1 | |
y_notsu | 0:0e2aded4edb0 | 224 | // * +----------------------+ |
y_notsu | 0:0e2aded4edb0 | 225 | // * 010 - OK! |
y_notsu | 0:0e2aded4edb0 | 226 | // * 101 - CRC Error |
y_notsu | 0:0e2aded4edb0 | 227 | // * 110 - Write Error |
y_notsu | 0:0e2aded4edb0 | 228 | // * |
y_notsu | 0:0e2aded4edb0 | 229 | // * Single Block Read and Write |
y_notsu | 0:0e2aded4edb0 | 230 | // * --------------------------- |
y_notsu | 0:0e2aded4edb0 | 231 | // * |
y_notsu | 0:0e2aded4edb0 | 232 | // * Block transfers have a byte header, followed by the data, followed |
y_notsu | 0:0e2aded4edb0 | 233 | // * by a 16-bit CRC. In our case, the data will always be 512 bytes. |
y_notsu | 0:0e2aded4edb0 | 234 | // * |
y_notsu | 0:0e2aded4edb0 | 235 | // * +------+---------+---------+- - - -+---------+-----------+----------+ |
y_notsu | 0:0e2aded4edb0 | 236 | // * | 0xFE | data[0] | data[1] | | data[n] | crc[15:8] | crc[7:0] | |
y_notsu | 0:0e2aded4edb0 | 237 | // * +------+---------+---------+- - - -+---------+-----------+----------+ |
y_notsu | 0:0e2aded4edb0 | 238 | // */ |
y_notsu | 0:0e2aded4edb0 | 239 | // |
y_notsu | 0:0e2aded4edb0 | 240 | //* |
y_notsu | 0:0e2aded4edb0 | 241 | // * Comment: Changes for SDHC support till 32GB |
y_notsu | 0:0e2aded4edb0 | 242 | // * Name: KB |
y_notsu | 0:0e2aded4edb0 | 243 | // * Date: 07/24/2010 |
y_notsu | 0:0e2aded4edb0 | 244 | // * Release: 0.1 |
y_notsu | 0:0e2aded4edb0 | 245 | // */ |
y_notsu | 0:0e2aded4edb0 | 246 | |
y_notsu | 0:0e2aded4edb0 | 247 | #include "SDHCFileSystem.h" |
y_notsu | 0:0e2aded4edb0 | 248 | |
y_notsu | 0:0e2aded4edb0 | 249 | #define DEBUG |
y_notsu | 0:0e2aded4edb0 | 250 | #define SD_COMMAND_TIMEOUT 5000 |
y_notsu | 0:0e2aded4edb0 | 251 | |
y_notsu | 0:0e2aded4edb0 | 252 | |
y_notsu | 0:0e2aded4edb0 | 253 | SDFileSystem::SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name) : |
y_notsu | 0:0e2aded4edb0 | 254 | FATFileSystem(name), _spi(mosi, miso, sclk), _cs(cs) { |
y_notsu | 0:0e2aded4edb0 | 255 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 256 | } |
y_notsu | 0:0e2aded4edb0 | 257 | |
y_notsu | 0:0e2aded4edb0 | 258 | #define R1_IDLE_STATE (1 << 0) |
y_notsu | 0:0e2aded4edb0 | 259 | #define R1_ERASE_RESET (1 << 1) |
y_notsu | 0:0e2aded4edb0 | 260 | #define R1_ILLEGAL_COMMAND (1 << 2) |
y_notsu | 0:0e2aded4edb0 | 261 | #define R1_COM_CRC_ERROR (1 << 3) |
y_notsu | 0:0e2aded4edb0 | 262 | #define R1_ERASE_SEQUENCE_ERROR (1 << 4) |
y_notsu | 0:0e2aded4edb0 | 263 | #define R1_ADDRESS_ERROR (1 << 5) |
y_notsu | 0:0e2aded4edb0 | 264 | #define R1_PARAMETER_ERROR (1 << 6) |
y_notsu | 0:0e2aded4edb0 | 265 | |
y_notsu | 0:0e2aded4edb0 | 266 | // Types |
y_notsu | 0:0e2aded4edb0 | 267 | // - v1.x Standard Capacity |
y_notsu | 0:0e2aded4edb0 | 268 | // - v2.x Standard Capacity |
y_notsu | 0:0e2aded4edb0 | 269 | // - v2.x High Capacity |
y_notsu | 0:0e2aded4edb0 | 270 | // - Not recognised as an SD Card |
y_notsu | 0:0e2aded4edb0 | 271 | |
y_notsu | 0:0e2aded4edb0 | 272 | #define SDCARD_FAIL 0 |
y_notsu | 0:0e2aded4edb0 | 273 | #define SDCARD_V1 1 |
y_notsu | 0:0e2aded4edb0 | 274 | #define SDCARD_V2 2 |
y_notsu | 0:0e2aded4edb0 | 275 | #define SDCARD_V2HC 3 |
y_notsu | 0:0e2aded4edb0 | 276 | |
y_notsu | 0:0e2aded4edb0 | 277 | int SDFileSystem::initialise_card() { |
y_notsu | 0:0e2aded4edb0 | 278 | // Set to 100kHz for initialisation, and clock card with cs = 1 |
y_notsu | 0:0e2aded4edb0 | 279 | _spi.frequency(40000000); |
y_notsu | 0:0e2aded4edb0 | 280 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 281 | for(int i=0; i<16; i++) { |
y_notsu | 0:0e2aded4edb0 | 282 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 283 | } |
y_notsu | 0:0e2aded4edb0 | 284 | |
y_notsu | 0:0e2aded4edb0 | 285 | // send CMD0, should return with all zeros except IDLE STATE set (bit 0) |
y_notsu | 0:0e2aded4edb0 | 286 | if(_cmd(0, 0) != R1_IDLE_STATE) { |
y_notsu | 0:0e2aded4edb0 | 287 | fprintf(stderr, "No disk, or could not put SD card in to SPI idle state\n"); |
y_notsu | 0:0e2aded4edb0 | 288 | return SDCARD_FAIL; |
y_notsu | 0:0e2aded4edb0 | 289 | } |
y_notsu | 0:0e2aded4edb0 | 290 | |
y_notsu | 0:0e2aded4edb0 | 291 | // send CMD8 to determine whther it is ver 2.x |
y_notsu | 0:0e2aded4edb0 | 292 | int r = _cmd8(); |
y_notsu | 0:0e2aded4edb0 | 293 | if(r == R1_IDLE_STATE) { |
y_notsu | 0:0e2aded4edb0 | 294 | return initialise_card_v2(); |
y_notsu | 0:0e2aded4edb0 | 295 | } else if(r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) { |
y_notsu | 0:0e2aded4edb0 | 296 | return initialise_card_v1(); |
y_notsu | 0:0e2aded4edb0 | 297 | } else { |
y_notsu | 0:0e2aded4edb0 | 298 | fprintf(stderr, "Not in idle state after sending CMD8 (not an SD card?)\n"); |
y_notsu | 0:0e2aded4edb0 | 299 | return SDCARD_FAIL; |
y_notsu | 0:0e2aded4edb0 | 300 | } |
y_notsu | 0:0e2aded4edb0 | 301 | } |
y_notsu | 0:0e2aded4edb0 | 302 | |
y_notsu | 0:0e2aded4edb0 | 303 | int SDFileSystem::initialise_card_v1() { |
y_notsu | 0:0e2aded4edb0 | 304 | for(int i=0; i<SD_COMMAND_TIMEOUT; i++) { |
y_notsu | 0:0e2aded4edb0 | 305 | _cmd(55, 0); |
y_notsu | 0:0e2aded4edb0 | 306 | if(_cmd(41, 0) == 0) { |
y_notsu | 0:0e2aded4edb0 | 307 | cdv = 512; |
y_notsu | 0:0e2aded4edb0 | 308 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 309 | printf("\n\rInit: SEDCARD_V1\n\r"); |
y_notsu | 0:0e2aded4edb0 | 310 | #endif |
y_notsu | 0:0e2aded4edb0 | 311 | return SDCARD_V1; |
y_notsu | 0:0e2aded4edb0 | 312 | } |
y_notsu | 0:0e2aded4edb0 | 313 | } |
y_notsu | 0:0e2aded4edb0 | 314 | |
y_notsu | 0:0e2aded4edb0 | 315 | fprintf(stderr, "Timeout waiting for v1.x card\n"); |
y_notsu | 0:0e2aded4edb0 | 316 | return SDCARD_FAIL; |
y_notsu | 0:0e2aded4edb0 | 317 | } |
y_notsu | 0:0e2aded4edb0 | 318 | |
y_notsu | 0:0e2aded4edb0 | 319 | int SDFileSystem::initialise_card_v2() { |
y_notsu | 0:0e2aded4edb0 | 320 | |
y_notsu | 0:0e2aded4edb0 | 321 | for(int i=0; i<SD_COMMAND_TIMEOUT; i++) { |
y_notsu | 0:0e2aded4edb0 | 322 | wait_ms(50); |
y_notsu | 0:0e2aded4edb0 | 323 | _cmd58(); |
y_notsu | 0:0e2aded4edb0 | 324 | _cmd(55, 0); |
y_notsu | 0:0e2aded4edb0 | 325 | if(_cmd(41, 0x40000000) == 0) { |
y_notsu | 0:0e2aded4edb0 | 326 | _cmd58(); |
y_notsu | 0:0e2aded4edb0 | 327 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 328 | printf("\n\rInit: SDCARD_V2\n\r"); |
y_notsu | 0:0e2aded4edb0 | 329 | #endif |
y_notsu | 0:0e2aded4edb0 | 330 | cdv = 1; |
y_notsu | 0:0e2aded4edb0 | 331 | return SDCARD_V2; |
y_notsu | 0:0e2aded4edb0 | 332 | } |
y_notsu | 0:0e2aded4edb0 | 333 | } |
y_notsu | 0:0e2aded4edb0 | 334 | |
y_notsu | 0:0e2aded4edb0 | 335 | fprintf(stderr, "Timeout waiting for v2.x card\n"); |
y_notsu | 0:0e2aded4edb0 | 336 | return SDCARD_FAIL; |
y_notsu | 0:0e2aded4edb0 | 337 | } |
y_notsu | 0:0e2aded4edb0 | 338 | |
y_notsu | 0:0e2aded4edb0 | 339 | int SDFileSystem::disk_initialize() { |
y_notsu | 0:0e2aded4edb0 | 340 | |
y_notsu | 0:0e2aded4edb0 | 341 | int i = initialise_card(); |
y_notsu | 0:0e2aded4edb0 | 342 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 343 | printf("init card = %d\n", i); |
y_notsu | 0:0e2aded4edb0 | 344 | #endif |
y_notsu | 0:0e2aded4edb0 | 345 | _sectors = _sd_sectors(); |
y_notsu | 0:0e2aded4edb0 | 346 | |
y_notsu | 0:0e2aded4edb0 | 347 | // Set block length to 512 (CMD16) |
y_notsu | 0:0e2aded4edb0 | 348 | if(_cmd(16, 512) != 0) { |
y_notsu | 0:0e2aded4edb0 | 349 | fprintf(stderr, "Set 512-byte block timed out\n"); |
y_notsu | 0:0e2aded4edb0 | 350 | return 1; |
y_notsu | 0:0e2aded4edb0 | 351 | } |
y_notsu | 0:0e2aded4edb0 | 352 | |
y_notsu | 0:0e2aded4edb0 | 353 | _spi.frequency(40000000); // Set to 1MHz for data transfer |
y_notsu | 0:0e2aded4edb0 | 354 | return 0; |
y_notsu | 0:0e2aded4edb0 | 355 | } |
y_notsu | 0:0e2aded4edb0 | 356 | |
y_notsu | 0:0e2aded4edb0 | 357 | int SDFileSystem::disk_write(const char *buffer, int block_number) { |
y_notsu | 0:0e2aded4edb0 | 358 | // set write address for single block (CMD24) |
y_notsu | 0:0e2aded4edb0 | 359 | if(_cmd(24, block_number * cdv) != 0) { |
y_notsu | 0:0e2aded4edb0 | 360 | return 1; |
y_notsu | 0:0e2aded4edb0 | 361 | } |
y_notsu | 0:0e2aded4edb0 | 362 | |
y_notsu | 0:0e2aded4edb0 | 363 | // send the data block |
y_notsu | 0:0e2aded4edb0 | 364 | _write(buffer, 512); |
y_notsu | 0:0e2aded4edb0 | 365 | return 0; |
y_notsu | 0:0e2aded4edb0 | 366 | } |
y_notsu | 0:0e2aded4edb0 | 367 | |
y_notsu | 0:0e2aded4edb0 | 368 | int SDFileSystem::disk_read(char *buffer, int block_number) { |
y_notsu | 0:0e2aded4edb0 | 369 | // set read address for single block (CMD17) |
y_notsu | 0:0e2aded4edb0 | 370 | if(_cmd(17, block_number * cdv) != 0) { |
y_notsu | 0:0e2aded4edb0 | 371 | return 1; |
y_notsu | 0:0e2aded4edb0 | 372 | } |
y_notsu | 0:0e2aded4edb0 | 373 | |
y_notsu | 0:0e2aded4edb0 | 374 | // receive the data |
y_notsu | 0:0e2aded4edb0 | 375 | _read(buffer, 512); |
y_notsu | 0:0e2aded4edb0 | 376 | return 0; |
y_notsu | 0:0e2aded4edb0 | 377 | } |
y_notsu | 0:0e2aded4edb0 | 378 | |
y_notsu | 0:0e2aded4edb0 | 379 | int SDFileSystem::disk_status() { return 0; } |
y_notsu | 0:0e2aded4edb0 | 380 | int SDFileSystem::disk_sync() { return 0; } |
y_notsu | 0:0e2aded4edb0 | 381 | int SDFileSystem::disk_sectors() { return _sectors; } |
y_notsu | 0:0e2aded4edb0 | 382 | |
y_notsu | 0:0e2aded4edb0 | 383 | // PRIVATE FUNCTIONS |
y_notsu | 0:0e2aded4edb0 | 384 | |
y_notsu | 0:0e2aded4edb0 | 385 | int SDFileSystem::_cmd(int cmd, int arg) { |
y_notsu | 0:0e2aded4edb0 | 386 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 387 | |
y_notsu | 0:0e2aded4edb0 | 388 | // send a command |
y_notsu | 0:0e2aded4edb0 | 389 | _spi.write(0x40 | cmd); |
y_notsu | 0:0e2aded4edb0 | 390 | _spi.write(arg >> 24); |
y_notsu | 0:0e2aded4edb0 | 391 | _spi.write(arg >> 16); |
y_notsu | 0:0e2aded4edb0 | 392 | _spi.write(arg >> 8); |
y_notsu | 0:0e2aded4edb0 | 393 | _spi.write(arg >> 0); |
y_notsu | 0:0e2aded4edb0 | 394 | _spi.write(0x95); |
y_notsu | 0:0e2aded4edb0 | 395 | |
y_notsu | 0:0e2aded4edb0 | 396 | // wait for the repsonse (response[7] == 0) |
y_notsu | 0:0e2aded4edb0 | 397 | for(int i=0; i<SD_COMMAND_TIMEOUT; i++) { |
y_notsu | 0:0e2aded4edb0 | 398 | int response = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 399 | if(!(response & 0x80)) { |
y_notsu | 0:0e2aded4edb0 | 400 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 401 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 402 | return response; |
y_notsu | 0:0e2aded4edb0 | 403 | } |
y_notsu | 0:0e2aded4edb0 | 404 | } |
y_notsu | 0:0e2aded4edb0 | 405 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 406 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 407 | return -1; // timeout |
y_notsu | 0:0e2aded4edb0 | 408 | } |
y_notsu | 0:0e2aded4edb0 | 409 | int SDFileSystem::_cmdx(int cmd, int arg) { |
y_notsu | 0:0e2aded4edb0 | 410 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 411 | |
y_notsu | 0:0e2aded4edb0 | 412 | // send a command |
y_notsu | 0:0e2aded4edb0 | 413 | _spi.write(0x40 | cmd); |
y_notsu | 0:0e2aded4edb0 | 414 | _spi.write(arg >> 24); |
y_notsu | 0:0e2aded4edb0 | 415 | _spi.write(arg >> 16); |
y_notsu | 0:0e2aded4edb0 | 416 | _spi.write(arg >> 8); |
y_notsu | 0:0e2aded4edb0 | 417 | _spi.write(arg >> 0); |
y_notsu | 0:0e2aded4edb0 | 418 | _spi.write(0x95); |
y_notsu | 0:0e2aded4edb0 | 419 | |
y_notsu | 0:0e2aded4edb0 | 420 | // wait for the repsonse (response[7] == 0) |
y_notsu | 0:0e2aded4edb0 | 421 | for(int i=0; i<SD_COMMAND_TIMEOUT; i++) { |
y_notsu | 0:0e2aded4edb0 | 422 | int response = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 423 | if(!(response & 0x80)) { |
y_notsu | 0:0e2aded4edb0 | 424 | return response; |
y_notsu | 0:0e2aded4edb0 | 425 | } |
y_notsu | 0:0e2aded4edb0 | 426 | } |
y_notsu | 0:0e2aded4edb0 | 427 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 428 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 429 | return -1; // timeout |
y_notsu | 0:0e2aded4edb0 | 430 | } |
y_notsu | 0:0e2aded4edb0 | 431 | |
y_notsu | 0:0e2aded4edb0 | 432 | |
y_notsu | 0:0e2aded4edb0 | 433 | int SDFileSystem::_cmd58() { |
y_notsu | 0:0e2aded4edb0 | 434 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 435 | int arg = 0; |
y_notsu | 0:0e2aded4edb0 | 436 | |
y_notsu | 0:0e2aded4edb0 | 437 | // send a command |
y_notsu | 0:0e2aded4edb0 | 438 | _spi.write(0x40 | 58); |
y_notsu | 0:0e2aded4edb0 | 439 | _spi.write(arg >> 24); |
y_notsu | 0:0e2aded4edb0 | 440 | _spi.write(arg >> 16); |
y_notsu | 0:0e2aded4edb0 | 441 | _spi.write(arg >> 8); |
y_notsu | 0:0e2aded4edb0 | 442 | _spi.write(arg >> 0); |
y_notsu | 0:0e2aded4edb0 | 443 | _spi.write(0x95); |
y_notsu | 0:0e2aded4edb0 | 444 | |
y_notsu | 0:0e2aded4edb0 | 445 | // wait for the repsonse (response[7] == 0) |
y_notsu | 0:0e2aded4edb0 | 446 | for(int i=0; i<SD_COMMAND_TIMEOUT; i++) { |
y_notsu | 0:0e2aded4edb0 | 447 | int response = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 448 | if(!(response & 0x80)) { |
y_notsu | 0:0e2aded4edb0 | 449 | int ocr = _spi.write(0xFF) << 24; |
y_notsu | 0:0e2aded4edb0 | 450 | ocr |= _spi.write(0xFF) << 16; |
y_notsu | 0:0e2aded4edb0 | 451 | ocr |= _spi.write(0xFF) << 8; |
y_notsu | 0:0e2aded4edb0 | 452 | ocr |= _spi.write(0xFF) << 0; |
y_notsu | 0:0e2aded4edb0 | 453 | // printf("OCR = 0x%08X\n", ocr); |
y_notsu | 0:0e2aded4edb0 | 454 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 455 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 456 | return response; |
y_notsu | 0:0e2aded4edb0 | 457 | } |
y_notsu | 0:0e2aded4edb0 | 458 | } |
y_notsu | 0:0e2aded4edb0 | 459 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 460 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 461 | return -1; // timeout |
y_notsu | 0:0e2aded4edb0 | 462 | } |
y_notsu | 0:0e2aded4edb0 | 463 | |
y_notsu | 0:0e2aded4edb0 | 464 | int SDFileSystem::_cmd8() { |
y_notsu | 0:0e2aded4edb0 | 465 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 466 | |
y_notsu | 0:0e2aded4edb0 | 467 | // send a command |
y_notsu | 0:0e2aded4edb0 | 468 | _spi.write(0x40 | 8); // CMD8 |
y_notsu | 0:0e2aded4edb0 | 469 | _spi.write(0x00); // reserved |
y_notsu | 0:0e2aded4edb0 | 470 | _spi.write(0x00); // reserved |
y_notsu | 0:0e2aded4edb0 | 471 | _spi.write(0x01); // 3.3v |
y_notsu | 0:0e2aded4edb0 | 472 | _spi.write(0xAA); // check pattern |
y_notsu | 0:0e2aded4edb0 | 473 | _spi.write(0x87); // crc |
y_notsu | 0:0e2aded4edb0 | 474 | |
y_notsu | 0:0e2aded4edb0 | 475 | // wait for the repsonse (response[7] == 0) |
y_notsu | 0:0e2aded4edb0 | 476 | for(int i=0; i<SD_COMMAND_TIMEOUT * 1000; i++) { |
y_notsu | 0:0e2aded4edb0 | 477 | char response[5]; |
y_notsu | 0:0e2aded4edb0 | 478 | response[0] = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 479 | if(!(response[0] & 0x80)) { |
y_notsu | 0:0e2aded4edb0 | 480 | for(int j=1; j<5; j++) { |
y_notsu | 0:0e2aded4edb0 | 481 | response[i] = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 482 | } |
y_notsu | 0:0e2aded4edb0 | 483 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 484 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 485 | return response[0]; |
y_notsu | 0:0e2aded4edb0 | 486 | } |
y_notsu | 0:0e2aded4edb0 | 487 | } |
y_notsu | 0:0e2aded4edb0 | 488 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 489 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 490 | return -1; // timeout |
y_notsu | 0:0e2aded4edb0 | 491 | } |
y_notsu | 0:0e2aded4edb0 | 492 | |
y_notsu | 0:0e2aded4edb0 | 493 | int SDFileSystem::_read(char *buffer, int length) { |
y_notsu | 0:0e2aded4edb0 | 494 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 495 | |
y_notsu | 0:0e2aded4edb0 | 496 | // read until start byte (0xFF) |
y_notsu | 0:0e2aded4edb0 | 497 | while(_spi.write(0xFF) != 0xFE); |
y_notsu | 0:0e2aded4edb0 | 498 | |
y_notsu | 0:0e2aded4edb0 | 499 | // read data |
y_notsu | 0:0e2aded4edb0 | 500 | for(int i=0; i<length; i++) { |
y_notsu | 0:0e2aded4edb0 | 501 | buffer[i] = _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 502 | } |
y_notsu | 0:0e2aded4edb0 | 503 | _spi.write(0xFF); // checksum |
y_notsu | 0:0e2aded4edb0 | 504 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 505 | |
y_notsu | 0:0e2aded4edb0 | 506 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 507 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 508 | return 0; |
y_notsu | 0:0e2aded4edb0 | 509 | } |
y_notsu | 0:0e2aded4edb0 | 510 | |
y_notsu | 0:0e2aded4edb0 | 511 | int SDFileSystem::_write(const char *buffer, int length) { |
y_notsu | 0:0e2aded4edb0 | 512 | _cs = 0; |
y_notsu | 0:0e2aded4edb0 | 513 | |
y_notsu | 0:0e2aded4edb0 | 514 | // indicate start of block |
y_notsu | 0:0e2aded4edb0 | 515 | _spi.write(0xFE); |
y_notsu | 0:0e2aded4edb0 | 516 | |
y_notsu | 0:0e2aded4edb0 | 517 | // write the data |
y_notsu | 0:0e2aded4edb0 | 518 | for(int i=0; i<length; i++) { |
y_notsu | 0:0e2aded4edb0 | 519 | _spi.write(buffer[i]); |
y_notsu | 0:0e2aded4edb0 | 520 | } |
y_notsu | 0:0e2aded4edb0 | 521 | |
y_notsu | 0:0e2aded4edb0 | 522 | // write the checksum |
y_notsu | 0:0e2aded4edb0 | 523 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 524 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 525 | |
y_notsu | 0:0e2aded4edb0 | 526 | // check the repsonse token |
y_notsu | 0:0e2aded4edb0 | 527 | if((_spi.write(0xFF) & 0x1F) != 0x05) { |
y_notsu | 0:0e2aded4edb0 | 528 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 529 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 530 | return 1; |
y_notsu | 0:0e2aded4edb0 | 531 | } |
y_notsu | 0:0e2aded4edb0 | 532 | |
y_notsu | 0:0e2aded4edb0 | 533 | // wait for write to finish |
y_notsu | 0:0e2aded4edb0 | 534 | while(_spi.write(0xFF) == 0); |
y_notsu | 0:0e2aded4edb0 | 535 | |
y_notsu | 0:0e2aded4edb0 | 536 | _cs = 1; |
y_notsu | 0:0e2aded4edb0 | 537 | _spi.write(0xFF); |
y_notsu | 0:0e2aded4edb0 | 538 | return 0; |
y_notsu | 0:0e2aded4edb0 | 539 | } |
y_notsu | 0:0e2aded4edb0 | 540 | |
y_notsu | 0:0e2aded4edb0 | 541 | static int ext_bits(char *data, int msb, int lsb) { |
y_notsu | 0:0e2aded4edb0 | 542 | int bits = 0; |
y_notsu | 0:0e2aded4edb0 | 543 | int size = 1 + msb - lsb; |
y_notsu | 0:0e2aded4edb0 | 544 | for(int i=0; i<size; i++) { |
y_notsu | 0:0e2aded4edb0 | 545 | int position = lsb + i; |
y_notsu | 0:0e2aded4edb0 | 546 | int byte = 15 - (position >> 3); |
y_notsu | 0:0e2aded4edb0 | 547 | int bit = position & 0x7; |
y_notsu | 0:0e2aded4edb0 | 548 | int value = (data[byte] >> bit) & 1; |
y_notsu | 0:0e2aded4edb0 | 549 | bits |= value << i; |
y_notsu | 0:0e2aded4edb0 | 550 | } |
y_notsu | 0:0e2aded4edb0 | 551 | return bits; |
y_notsu | 0:0e2aded4edb0 | 552 | } |
y_notsu | 0:0e2aded4edb0 | 553 | |
y_notsu | 0:0e2aded4edb0 | 554 | int SDFileSystem::_sd_sectors() { |
y_notsu | 0:0e2aded4edb0 | 555 | |
y_notsu | 0:0e2aded4edb0 | 556 | int c_size, c_size_mult, read_bl_len; |
y_notsu | 0:0e2aded4edb0 | 557 | int block_len, mult, blocknr, capacity; |
y_notsu | 0:0e2aded4edb0 | 558 | int blocks, hc_c_size; |
y_notsu | 0:0e2aded4edb0 | 559 | uint64_t hc_capacity; |
y_notsu | 0:0e2aded4edb0 | 560 | |
y_notsu | 0:0e2aded4edb0 | 561 | // CMD9, Response R2 (R1 byte + 16-byte block read) |
y_notsu | 0:0e2aded4edb0 | 562 | if(_cmdx(9, 0) != 0) { |
y_notsu | 0:0e2aded4edb0 | 563 | fprintf(stderr, "Didn't get a response from the disk\n"); |
y_notsu | 0:0e2aded4edb0 | 564 | return 0; |
y_notsu | 0:0e2aded4edb0 | 565 | } |
y_notsu | 0:0e2aded4edb0 | 566 | |
y_notsu | 0:0e2aded4edb0 | 567 | char csd[16]; |
y_notsu | 0:0e2aded4edb0 | 568 | if(_read(csd, 16) != 0) { |
y_notsu | 0:0e2aded4edb0 | 569 | fprintf(stderr, "Couldn't read csd response from disk\n"); |
y_notsu | 0:0e2aded4edb0 | 570 | return 0; |
y_notsu | 0:0e2aded4edb0 | 571 | } |
y_notsu | 0:0e2aded4edb0 | 572 | |
y_notsu | 0:0e2aded4edb0 | 573 | // csd_structure : csd[127:126] |
y_notsu | 0:0e2aded4edb0 | 574 | // c_size : csd[73:62] |
y_notsu | 0:0e2aded4edb0 | 575 | // c_size_mult : csd[49:47] |
y_notsu | 0:0e2aded4edb0 | 576 | // read_bl_len : csd[83:80] - the *maximum* read block length |
y_notsu | 0:0e2aded4edb0 | 577 | |
y_notsu | 0:0e2aded4edb0 | 578 | int csd_structure = ext_bits(csd, 127, 126); |
y_notsu | 0:0e2aded4edb0 | 579 | |
y_notsu | 0:0e2aded4edb0 | 580 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 581 | printf("\n\rCSD_STRUCT = %d\n", csd_structure); |
y_notsu | 0:0e2aded4edb0 | 582 | #endif |
y_notsu | 0:0e2aded4edb0 | 583 | |
y_notsu | 0:0e2aded4edb0 | 584 | switch (csd_structure){ |
y_notsu | 0:0e2aded4edb0 | 585 | case 0: |
y_notsu | 0:0e2aded4edb0 | 586 | cdv = 512; |
y_notsu | 0:0e2aded4edb0 | 587 | c_size = ext_bits(csd, 73, 62); |
y_notsu | 0:0e2aded4edb0 | 588 | c_size_mult = ext_bits(csd, 49, 47); |
y_notsu | 0:0e2aded4edb0 | 589 | read_bl_len = ext_bits(csd, 83, 80); |
y_notsu | 0:0e2aded4edb0 | 590 | |
y_notsu | 0:0e2aded4edb0 | 591 | block_len = 1 << read_bl_len; |
y_notsu | 0:0e2aded4edb0 | 592 | mult = 1 << (c_size_mult + 2); |
y_notsu | 0:0e2aded4edb0 | 593 | blocknr = (c_size + 1) * mult; |
y_notsu | 0:0e2aded4edb0 | 594 | capacity = blocknr * block_len; |
y_notsu | 0:0e2aded4edb0 | 595 | blocks = capacity / 512; |
y_notsu | 0:0e2aded4edb0 | 596 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 597 | printf("\n\rSDCard\n\rc_size: %.4X \n\rcapacity: %.ld \n\rsectors: %d\n\r", c_size, capacity, blocks); |
y_notsu | 0:0e2aded4edb0 | 598 | #endif |
y_notsu | 0:0e2aded4edb0 | 599 | break; |
y_notsu | 0:0e2aded4edb0 | 600 | |
y_notsu | 0:0e2aded4edb0 | 601 | case 1: |
y_notsu | 0:0e2aded4edb0 | 602 | cdv = 1; |
y_notsu | 0:0e2aded4edb0 | 603 | hc_c_size = ext_bits(csd, 63, 48); |
y_notsu | 0:0e2aded4edb0 | 604 | int hc_read_bl_len = ext_bits(csd, 83, 80); |
y_notsu | 0:0e2aded4edb0 | 605 | hc_capacity = hc_c_size+1; |
y_notsu | 0:0e2aded4edb0 | 606 | blocks = (hc_c_size+1)*1024; |
y_notsu | 0:0e2aded4edb0 | 607 | #ifdef DEBUG |
y_notsu | 0:0e2aded4edb0 | 608 | printf("\n\rSDHC Card \n\rhc_c_size: %.4X \n\rcapacity: %.lld \n\rsectors: %d\n\r", hc_c_size, hc_capacity*512*1024, blocks); |
y_notsu | 0:0e2aded4edb0 | 609 | #endif |
y_notsu | 0:0e2aded4edb0 | 610 | break; |
y_notsu | 0:0e2aded4edb0 | 611 | |
y_notsu | 0:0e2aded4edb0 | 612 | default: |
y_notsu | 0:0e2aded4edb0 | 613 | fprintf(stderr, "This disk tastes funny! I only know about type 0 CSD structures\n"); |
y_notsu | 0:0e2aded4edb0 | 614 | return 0; |
y_notsu | 0:0e2aded4edb0 | 615 | // break; |
y_notsu | 0:0e2aded4edb0 | 616 | }; |
y_notsu | 0:0e2aded4edb0 | 617 | return blocks; |
y_notsu | 0:0e2aded4edb0 | 618 | } |