vr1.1
Dependencies: FreescaleIAP mbed-rtos mbed
Fork of CDMS_RTOS_v1_1 by
SDCard.cpp@8:607ae92fa6af, 2015-07-04 (annotated)
- Committer:
- cholletisaik777
- Date:
- Sat Jul 04 08:56:34 2015 +0000
- Revision:
- 8:607ae92fa6af
- Parent:
- 7:c270a9e37290
- Child:
- 11:d6dc9074075b
cdms_rtos_v1_0_3
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
cholletisaik777 | 8:607ae92fa6af | 1 | #include "mbed.h" |
cholletisaik777 | 8:607ae92fa6af | 2 | #include "mbed_debug.h" |
cholletisaik777 | 0:d6e3d1e21484 | 3 | #include "SDCard.h" |
cholletisaik777 | 8:607ae92fa6af | 4 | #include "all_funcs.h" |
cholletisaik777 | 0:d6e3d1e21484 | 5 | |
cholletisaik777 | 0:d6e3d1e21484 | 6 | SPI spi_SD(PTD6, PTD7, PTD5); // mosi, miso, sclk |
pradeepvk2208 | 2:4c79b3dfef31 | 7 | DigitalOut cs_SD(D2); |
cholletisaik777 | 0:d6e3d1e21484 | 8 | |
cholletisaik777 | 0:d6e3d1e21484 | 9 | int count_bro; |
cholletisaik777 | 0:d6e3d1e21484 | 10 | int cdv; |
cholletisaik777 | 4:cc85cfaa2086 | 11 | uint64_t sectors; |
cholletisaik777 | 0:d6e3d1e21484 | 12 | |
cholletisaik777 | 7:c270a9e37290 | 13 | int *FCTN_INIT_SD() |
cholletisaik777 | 4:cc85cfaa2086 | 14 | { |
cholletisaik777 | 4:cc85cfaa2086 | 15 | int sd_response[2] = {initialise_card(),disk_initialize()}; |
cholletisaik777 | 4:cc85cfaa2086 | 16 | return sd_response; |
cholletisaik777 | 4:cc85cfaa2086 | 17 | } |
cholletisaik777 | 4:cc85cfaa2086 | 18 | |
cholletisaik777 | 4:cc85cfaa2086 | 19 | |
cholletisaik777 | 0:d6e3d1e21484 | 20 | int initialise_card() { |
cholletisaik777 | 0:d6e3d1e21484 | 21 | // Set to 100kHz for initialisation, and clock card with cs_SD = 1 |
cholletisaik777 | 0:d6e3d1e21484 | 22 | spi_SD.frequency(100000); |
cholletisaik777 | 0:d6e3d1e21484 | 23 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 24 | for (int i = 0; i < 16; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 25 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 26 | } |
cholletisaik777 | 0:d6e3d1e21484 | 27 | |
cholletisaik777 | 0:d6e3d1e21484 | 28 | // send CMD0, should return with all zeros except IDLE STATE set (bit 0) |
cholletisaik777 | 0:d6e3d1e21484 | 29 | if (cmd(0, 0) != R1_IDLE_STATE) { |
cholletisaik777 | 0:d6e3d1e21484 | 30 | debug("No disk, or could not put SD card in to SPI idle state\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 31 | return SDCARD_FAIL; |
cholletisaik777 | 0:d6e3d1e21484 | 32 | } |
cholletisaik777 | 0:d6e3d1e21484 | 33 | |
cholletisaik777 | 0:d6e3d1e21484 | 34 | // send CMD8 to determine whther it is ver 2.x |
cholletisaik777 | 0:d6e3d1e21484 | 35 | int r = cmd8(); |
cholletisaik777 | 8:607ae92fa6af | 36 | if (r == R1_IDLE_STATE) |
cholletisaik777 | 8:607ae92fa6af | 37 | { |
cholletisaik777 | 0:d6e3d1e21484 | 38 | printf("Entering v2 bro\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 39 | return initialise_card_v2(); |
cholletisaik777 | 0:d6e3d1e21484 | 40 | |
cholletisaik777 | 8:607ae92fa6af | 41 | } |
cholletisaik777 | 8:607ae92fa6af | 42 | else |
cholletisaik777 | 8:607ae92fa6af | 43 | { |
cholletisaik777 | 0:d6e3d1e21484 | 44 | debug("Not in idle state after sending CMD8 (not an SD card?)\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 45 | return SDCARD_FAIL; |
cholletisaik777 | 0:d6e3d1e21484 | 46 | } |
cholletisaik777 | 0:d6e3d1e21484 | 47 | } |
cholletisaik777 | 0:d6e3d1e21484 | 48 | |
cholletisaik777 | 0:d6e3d1e21484 | 49 | int initialise_card_v1() { |
cholletisaik777 | 0:d6e3d1e21484 | 50 | for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 51 | cmd(55, 0); |
cholletisaik777 | 0:d6e3d1e21484 | 52 | if (cmd(41, 0) == 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 53 | printf("Yuppie v1 successful\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 54 | cdv = 512; |
cholletisaik777 | 0:d6e3d1e21484 | 55 | debug_if(SD_DBG, "\r\n\rInit: SEDCARD_V1\r\n\r"); |
cholletisaik777 | 0:d6e3d1e21484 | 56 | |
cholletisaik777 | 0:d6e3d1e21484 | 57 | return SDCARD_V1; |
cholletisaik777 | 0:d6e3d1e21484 | 58 | } |
cholletisaik777 | 0:d6e3d1e21484 | 59 | } |
cholletisaik777 | 0:d6e3d1e21484 | 60 | |
cholletisaik777 | 0:d6e3d1e21484 | 61 | debug("Timeout waiting for v1.x card\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 62 | return SDCARD_FAIL; |
cholletisaik777 | 0:d6e3d1e21484 | 63 | } |
cholletisaik777 | 0:d6e3d1e21484 | 64 | |
cholletisaik777 | 0:d6e3d1e21484 | 65 | |
cholletisaik777 | 0:d6e3d1e21484 | 66 | int initialise_card_v2() { |
cholletisaik777 | 0:d6e3d1e21484 | 67 | for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 68 | wait_ms(50); |
cholletisaik777 | 0:d6e3d1e21484 | 69 | cmd58(); |
cholletisaik777 | 0:d6e3d1e21484 | 70 | cmd(55, 0); |
cholletisaik777 | 0:d6e3d1e21484 | 71 | if (cmd(41, 0x40000000) == 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 72 | printf("Yuppie,v2 successful\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 73 | cmd58(); |
cholletisaik777 | 0:d6e3d1e21484 | 74 | debug_if(SD_DBG, "\r\n\rInit: SDCARD_V2\r\n\r"); |
cholletisaik777 | 0:d6e3d1e21484 | 75 | cdv = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 76 | |
cholletisaik777 | 0:d6e3d1e21484 | 77 | return SDCARD_V2; |
cholletisaik777 | 0:d6e3d1e21484 | 78 | } |
cholletisaik777 | 0:d6e3d1e21484 | 79 | } |
cholletisaik777 | 0:d6e3d1e21484 | 80 | |
cholletisaik777 | 0:d6e3d1e21484 | 81 | debug("Timeout waiting for v2.x card\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 82 | return SDCARD_FAIL; |
cholletisaik777 | 0:d6e3d1e21484 | 83 | } |
cholletisaik777 | 0:d6e3d1e21484 | 84 | |
cholletisaik777 | 0:d6e3d1e21484 | 85 | int cmd(int cmd, int arg) { |
cholletisaik777 | 0:d6e3d1e21484 | 86 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 87 | |
cholletisaik777 | 0:d6e3d1e21484 | 88 | // send a command |
cholletisaik777 | 0:d6e3d1e21484 | 89 | spi_SD.write(0x40 | cmd); |
cholletisaik777 | 0:d6e3d1e21484 | 90 | spi_SD.write(arg >> 24); |
cholletisaik777 | 0:d6e3d1e21484 | 91 | spi_SD.write(arg >> 16); |
cholletisaik777 | 0:d6e3d1e21484 | 92 | spi_SD.write(arg >> 8); |
cholletisaik777 | 0:d6e3d1e21484 | 93 | spi_SD.write(arg >> 0); |
cholletisaik777 | 0:d6e3d1e21484 | 94 | spi_SD.write(0x95); |
cholletisaik777 | 0:d6e3d1e21484 | 95 | |
cholletisaik777 | 0:d6e3d1e21484 | 96 | // wait for the repsonse (response[7] == 0) |
cholletisaik777 | 0:d6e3d1e21484 | 97 | for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 98 | int response = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 99 | if (!(response & 0x80)) { |
cholletisaik777 | 0:d6e3d1e21484 | 100 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 101 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 102 | return response; |
cholletisaik777 | 0:d6e3d1e21484 | 103 | } |
cholletisaik777 | 0:d6e3d1e21484 | 104 | } |
cholletisaik777 | 0:d6e3d1e21484 | 105 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 106 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 107 | return -1; // timeout |
cholletisaik777 | 0:d6e3d1e21484 | 108 | } |
cholletisaik777 | 0:d6e3d1e21484 | 109 | |
cholletisaik777 | 0:d6e3d1e21484 | 110 | |
cholletisaik777 | 0:d6e3d1e21484 | 111 | int cmd58() { |
cholletisaik777 | 0:d6e3d1e21484 | 112 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 113 | int arg = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 114 | |
cholletisaik777 | 0:d6e3d1e21484 | 115 | // send a command |
cholletisaik777 | 0:d6e3d1e21484 | 116 | spi_SD.write(0x40 | 58); |
cholletisaik777 | 0:d6e3d1e21484 | 117 | spi_SD.write(arg >> 24); |
cholletisaik777 | 0:d6e3d1e21484 | 118 | spi_SD.write(arg >> 16); |
cholletisaik777 | 0:d6e3d1e21484 | 119 | spi_SD.write(arg >> 8); |
cholletisaik777 | 0:d6e3d1e21484 | 120 | spi_SD.write(arg >> 0); |
cholletisaik777 | 0:d6e3d1e21484 | 121 | spi_SD.write(0x95); |
cholletisaik777 | 0:d6e3d1e21484 | 122 | |
cholletisaik777 | 0:d6e3d1e21484 | 123 | // wait for the repsonse (response[7] == 0) |
cholletisaik777 | 0:d6e3d1e21484 | 124 | for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 125 | int response = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 126 | if (!(response & 0x80)) { |
cholletisaik777 | 0:d6e3d1e21484 | 127 | int ocr = spi_SD.write(0xFF) << 24; |
cholletisaik777 | 0:d6e3d1e21484 | 128 | ocr |= spi_SD.write(0xFF) << 16; |
cholletisaik777 | 0:d6e3d1e21484 | 129 | ocr |= spi_SD.write(0xFF) << 8; |
cholletisaik777 | 0:d6e3d1e21484 | 130 | ocr |= spi_SD.write(0xFF) << 0; |
cholletisaik777 | 0:d6e3d1e21484 | 131 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 132 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 133 | return response; |
cholletisaik777 | 0:d6e3d1e21484 | 134 | } |
cholletisaik777 | 0:d6e3d1e21484 | 135 | } |
cholletisaik777 | 0:d6e3d1e21484 | 136 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 137 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 138 | return -1; // timeout |
cholletisaik777 | 0:d6e3d1e21484 | 139 | } |
cholletisaik777 | 0:d6e3d1e21484 | 140 | |
cholletisaik777 | 0:d6e3d1e21484 | 141 | |
cholletisaik777 | 0:d6e3d1e21484 | 142 | int cmd8() { |
cholletisaik777 | 0:d6e3d1e21484 | 143 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 144 | |
cholletisaik777 | 0:d6e3d1e21484 | 145 | // send a command |
cholletisaik777 | 0:d6e3d1e21484 | 146 | spi_SD.write(0x40 | 8); // CMD8 |
cholletisaik777 | 0:d6e3d1e21484 | 147 | spi_SD.write(0x00); // reserved |
cholletisaik777 | 0:d6e3d1e21484 | 148 | spi_SD.write(0x00); // reserved |
cholletisaik777 | 0:d6e3d1e21484 | 149 | spi_SD.write(0x01); // 3.3v |
cholletisaik777 | 0:d6e3d1e21484 | 150 | spi_SD.write(0xAA); // check pattern |
cholletisaik777 | 0:d6e3d1e21484 | 151 | spi_SD.write(0x87); // crc |
cholletisaik777 | 0:d6e3d1e21484 | 152 | |
cholletisaik777 | 0:d6e3d1e21484 | 153 | // wait for the repsonse (response[7] == 0) |
cholletisaik777 | 0:d6e3d1e21484 | 154 | for (int i = 0; i < SD_COMMAND_TIMEOUT * 1000; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 155 | char response[5]; |
cholletisaik777 | 0:d6e3d1e21484 | 156 | response[0] = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 157 | if (!(response[0] & 0x80)) { |
cholletisaik777 | 0:d6e3d1e21484 | 158 | for (int j = 1; j < 5; j++) { |
cholletisaik777 | 0:d6e3d1e21484 | 159 | response[i] = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 160 | } |
cholletisaik777 | 0:d6e3d1e21484 | 161 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 162 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 163 | return response[0]; |
cholletisaik777 | 0:d6e3d1e21484 | 164 | } |
cholletisaik777 | 0:d6e3d1e21484 | 165 | } |
cholletisaik777 | 0:d6e3d1e21484 | 166 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 167 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 168 | return -1; // timeout |
cholletisaik777 | 0:d6e3d1e21484 | 169 | } |
cholletisaik777 | 0:d6e3d1e21484 | 170 | |
cholletisaik777 | 0:d6e3d1e21484 | 171 | uint64_t sd_sectors() { |
cholletisaik777 | 0:d6e3d1e21484 | 172 | uint32_t c_size, c_size_mult, read_bl_len; |
cholletisaik777 | 0:d6e3d1e21484 | 173 | uint32_t block_len, mult, blocknr, capacity; |
cholletisaik777 | 0:d6e3d1e21484 | 174 | uint32_t hc_c_size; |
cholletisaik777 | 0:d6e3d1e21484 | 175 | uint64_t blocks; |
cholletisaik777 | 0:d6e3d1e21484 | 176 | |
cholletisaik777 | 0:d6e3d1e21484 | 177 | // CMD9, Response R2 (R1 byte + 16-byte block read) |
cholletisaik777 | 0:d6e3d1e21484 | 178 | if (cmdx(9, 0) != 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 179 | debug("Didn't get a response from the disk\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 180 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 181 | } |
cholletisaik777 | 0:d6e3d1e21484 | 182 | |
cholletisaik777 | 0:d6e3d1e21484 | 183 | uint8_t csd[16]; |
cholletisaik777 | 0:d6e3d1e21484 | 184 | if (read(csd, 16) != 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 185 | debug("Couldn't read csd response from disk\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 186 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 187 | } |
cholletisaik777 | 0:d6e3d1e21484 | 188 | |
cholletisaik777 | 0:d6e3d1e21484 | 189 | // csd_structure : csd[127:126] |
cholletisaik777 | 0:d6e3d1e21484 | 190 | // c_size : csd[73:62] |
cholletisaik777 | 0:d6e3d1e21484 | 191 | // c_size_mult : csd[49:47] |
cholletisaik777 | 0:d6e3d1e21484 | 192 | // read_bl_len : csd[83:80] - the *maximum* read block length |
cholletisaik777 | 0:d6e3d1e21484 | 193 | |
cholletisaik777 | 0:d6e3d1e21484 | 194 | int csd_structure = ext_bits(csd, 127, 126); |
cholletisaik777 | 0:d6e3d1e21484 | 195 | |
cholletisaik777 | 0:d6e3d1e21484 | 196 | switch (csd_structure) { |
cholletisaik777 | 0:d6e3d1e21484 | 197 | case 0: |
cholletisaik777 | 0:d6e3d1e21484 | 198 | cdv = 512; |
cholletisaik777 | 0:d6e3d1e21484 | 199 | c_size = ext_bits(csd, 73, 62); |
cholletisaik777 | 0:d6e3d1e21484 | 200 | c_size_mult = ext_bits(csd, 49, 47); |
cholletisaik777 | 0:d6e3d1e21484 | 201 | read_bl_len = ext_bits(csd, 83, 80); |
cholletisaik777 | 0:d6e3d1e21484 | 202 | |
cholletisaik777 | 0:d6e3d1e21484 | 203 | block_len = 1 << read_bl_len; |
cholletisaik777 | 0:d6e3d1e21484 | 204 | mult = 1 << (c_size_mult + 2); |
cholletisaik777 | 0:d6e3d1e21484 | 205 | blocknr = (c_size + 1) * mult; |
cholletisaik777 | 0:d6e3d1e21484 | 206 | capacity = blocknr * block_len; |
cholletisaik777 | 0:d6e3d1e21484 | 207 | blocks = capacity / 512; |
cholletisaik777 | 0:d6e3d1e21484 | 208 | debug_if(SD_DBG, "\r\n\rSDCard\r\n\rc_size: %d \r\n\rcapacity: %ld \r\n\rsectors: %lld\r\n\r", c_size, capacity, blocks); |
cholletisaik777 | 0:d6e3d1e21484 | 209 | break; |
cholletisaik777 | 0:d6e3d1e21484 | 210 | |
cholletisaik777 | 0:d6e3d1e21484 | 211 | case 1: |
cholletisaik777 | 0:d6e3d1e21484 | 212 | cdv = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 213 | hc_c_size = ext_bits(csd, 63, 48); |
cholletisaik777 | 0:d6e3d1e21484 | 214 | blocks = (hc_c_size+1)*1024; |
cholletisaik777 | 0:d6e3d1e21484 | 215 | debug_if(SD_DBG, "\r\n\rSDHC Card \r\n\rhc_c_size: %d\r\n\rcapacity: %lld \r\n\rsectors: %lld\r\n\r", hc_c_size, blocks*512, blocks); |
cholletisaik777 | 0:d6e3d1e21484 | 216 | break; |
cholletisaik777 | 0:d6e3d1e21484 | 217 | |
cholletisaik777 | 0:d6e3d1e21484 | 218 | default: |
cholletisaik777 | 0:d6e3d1e21484 | 219 | debug("CSD struct unsupported\r\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 220 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 221 | }; |
cholletisaik777 | 0:d6e3d1e21484 | 222 | return blocks; |
cholletisaik777 | 0:d6e3d1e21484 | 223 | } |
cholletisaik777 | 0:d6e3d1e21484 | 224 | |
cholletisaik777 | 0:d6e3d1e21484 | 225 | int cmdx(int cmd, int arg) { |
cholletisaik777 | 0:d6e3d1e21484 | 226 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 227 | |
cholletisaik777 | 0:d6e3d1e21484 | 228 | // send a command |
cholletisaik777 | 0:d6e3d1e21484 | 229 | spi_SD.write(0x40 | cmd); |
cholletisaik777 | 0:d6e3d1e21484 | 230 | spi_SD.write(arg >> 24); |
cholletisaik777 | 0:d6e3d1e21484 | 231 | spi_SD.write(arg >> 16); |
cholletisaik777 | 0:d6e3d1e21484 | 232 | spi_SD.write(arg >> 8); |
cholletisaik777 | 0:d6e3d1e21484 | 233 | spi_SD.write(arg >> 0); |
cholletisaik777 | 0:d6e3d1e21484 | 234 | spi_SD.write(0x95); |
cholletisaik777 | 0:d6e3d1e21484 | 235 | |
cholletisaik777 | 0:d6e3d1e21484 | 236 | // wait for the repsonse (response[7] == 0) |
cholletisaik777 | 0:d6e3d1e21484 | 237 | for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 238 | int response = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 239 | if (!(response & 0x80)) { |
cholletisaik777 | 0:d6e3d1e21484 | 240 | return response; |
cholletisaik777 | 0:d6e3d1e21484 | 241 | } |
cholletisaik777 | 0:d6e3d1e21484 | 242 | } |
cholletisaik777 | 0:d6e3d1e21484 | 243 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 244 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 245 | return -1; // timeout |
cholletisaik777 | 0:d6e3d1e21484 | 246 | } |
cholletisaik777 | 0:d6e3d1e21484 | 247 | |
cholletisaik777 | 0:d6e3d1e21484 | 248 | |
cholletisaik777 | 0:d6e3d1e21484 | 249 | int read(uint8_t *buffer, uint32_t length) { |
cholletisaik777 | 0:d6e3d1e21484 | 250 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 251 | |
cholletisaik777 | 0:d6e3d1e21484 | 252 | // read until start byte (0xFF) |
cholletisaik777 | 0:d6e3d1e21484 | 253 | while (spi_SD.write(0xFF) != 0xFE); |
cholletisaik777 | 0:d6e3d1e21484 | 254 | |
cholletisaik777 | 0:d6e3d1e21484 | 255 | // read data |
cholletisaik777 | 0:d6e3d1e21484 | 256 | for (int i = 0; i < length; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 257 | buffer[i] = spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 258 | } |
cholletisaik777 | 0:d6e3d1e21484 | 259 | spi_SD.write(0xFF); // checksum |
cholletisaik777 | 0:d6e3d1e21484 | 260 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 261 | |
cholletisaik777 | 0:d6e3d1e21484 | 262 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 263 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 264 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 265 | } |
cholletisaik777 | 0:d6e3d1e21484 | 266 | |
cholletisaik777 | 0:d6e3d1e21484 | 267 | static uint32_t ext_bits(unsigned char *data, int msb, int lsb) { |
cholletisaik777 | 0:d6e3d1e21484 | 268 | uint32_t bits = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 269 | uint32_t size = 1 + msb - lsb; |
cholletisaik777 | 0:d6e3d1e21484 | 270 | for (int i = 0; i < size; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 271 | uint32_t position = lsb + i; |
cholletisaik777 | 0:d6e3d1e21484 | 272 | uint32_t byte = 15 - (position >> 3); |
cholletisaik777 | 0:d6e3d1e21484 | 273 | uint32_t bit = position & 0x7; |
cholletisaik777 | 0:d6e3d1e21484 | 274 | uint32_t value = (data[byte] >> bit) & 1; |
cholletisaik777 | 0:d6e3d1e21484 | 275 | bits |= value << i; |
cholletisaik777 | 0:d6e3d1e21484 | 276 | } |
cholletisaik777 | 0:d6e3d1e21484 | 277 | return bits; |
cholletisaik777 | 0:d6e3d1e21484 | 278 | } |
cholletisaik777 | 0:d6e3d1e21484 | 279 | |
cholletisaik777 | 0:d6e3d1e21484 | 280 | int disk_initialize() { |
cholletisaik777 | 0:d6e3d1e21484 | 281 | int i = initialise_card(); |
cholletisaik777 | 0:d6e3d1e21484 | 282 | debug_if(SD_DBG, "init card = %d\r\n", i); |
cholletisaik777 | 0:d6e3d1e21484 | 283 | sectors = sd_sectors(); |
cholletisaik777 | 0:d6e3d1e21484 | 284 | |
cholletisaik777 | 0:d6e3d1e21484 | 285 | // Set block length to 512 (CMD16) |
cholletisaik777 | 0:d6e3d1e21484 | 286 | if (cmd(16, 512) != 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 287 | debug("Set 512-byte block timed out\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 288 | return 1; |
cholletisaik777 | 0:d6e3d1e21484 | 289 | } |
cholletisaik777 | 0:d6e3d1e21484 | 290 | else |
cholletisaik777 | 0:d6e3d1e21484 | 291 | { |
cholletisaik777 | 0:d6e3d1e21484 | 292 | printf("Hey,block init succesful\r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 293 | } |
cholletisaik777 | 0:d6e3d1e21484 | 294 | |
cholletisaik777 | 0:d6e3d1e21484 | 295 | spi_SD.frequency(1000000); // Set to 1MHz for data transfer |
cholletisaik777 | 0:d6e3d1e21484 | 296 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 297 | } |
cholletisaik777 | 0:d6e3d1e21484 | 298 | |
cholletisaik777 | 7:c270a9e37290 | 299 | int FCTN_WR_SD(const uint8_t *buffer, uint64_t block_number) |
cholletisaik777 | 0:d6e3d1e21484 | 300 | |
cholletisaik777 | 0:d6e3d1e21484 | 301 | { |
cholletisaik777 | 0:d6e3d1e21484 | 302 | // set write address for single block (CMD24) |
cholletisaik777 | 0:d6e3d1e21484 | 303 | if (cmd(24, block_number * cdv) != 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 304 | return 1; |
cholletisaik777 | 0:d6e3d1e21484 | 305 | } |
cholletisaik777 | 0:d6e3d1e21484 | 306 | |
cholletisaik777 | 0:d6e3d1e21484 | 307 | // send the data block |
cholletisaik777 | 0:d6e3d1e21484 | 308 | write(buffer, 512); |
cholletisaik777 | 0:d6e3d1e21484 | 309 | printf("Written Successfully bro \r\n"); |
cholletisaik777 | 0:d6e3d1e21484 | 310 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 311 | } |
cholletisaik777 | 0:d6e3d1e21484 | 312 | |
cholletisaik777 | 0:d6e3d1e21484 | 313 | int write(const uint8_t*buffer, uint32_t length) { |
cholletisaik777 | 0:d6e3d1e21484 | 314 | cs_SD = 0; |
cholletisaik777 | 0:d6e3d1e21484 | 315 | |
cholletisaik777 | 0:d6e3d1e21484 | 316 | // indicate start of block |
cholletisaik777 | 0:d6e3d1e21484 | 317 | spi_SD.write(0xFE); |
cholletisaik777 | 0:d6e3d1e21484 | 318 | |
cholletisaik777 | 0:d6e3d1e21484 | 319 | // write the data |
cholletisaik777 | 0:d6e3d1e21484 | 320 | for (int i = 0; i < length; i++) { |
cholletisaik777 | 0:d6e3d1e21484 | 321 | spi_SD.write(buffer[i]); |
cholletisaik777 | 0:d6e3d1e21484 | 322 | } |
cholletisaik777 | 0:d6e3d1e21484 | 323 | |
cholletisaik777 | 0:d6e3d1e21484 | 324 | // write the checksum |
cholletisaik777 | 0:d6e3d1e21484 | 325 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 326 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 327 | |
cholletisaik777 | 0:d6e3d1e21484 | 328 | // check the response token |
cholletisaik777 | 0:d6e3d1e21484 | 329 | if ((spi_SD.write(0xFF) & 0x1F) != 0x05) { |
cholletisaik777 | 0:d6e3d1e21484 | 330 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 331 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 332 | return 1; |
cholletisaik777 | 0:d6e3d1e21484 | 333 | } |
cholletisaik777 | 0:d6e3d1e21484 | 334 | |
cholletisaik777 | 0:d6e3d1e21484 | 335 | // wait for write to finish |
cholletisaik777 | 0:d6e3d1e21484 | 336 | while (spi_SD.write(0xFF) == 0); |
cholletisaik777 | 0:d6e3d1e21484 | 337 | |
cholletisaik777 | 0:d6e3d1e21484 | 338 | cs_SD = 1; |
cholletisaik777 | 0:d6e3d1e21484 | 339 | spi_SD.write(0xFF); |
cholletisaik777 | 0:d6e3d1e21484 | 340 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 341 | } |
cholletisaik777 | 0:d6e3d1e21484 | 342 | |
cholletisaik777 | 7:c270a9e37290 | 343 | int FCTN_RD_SD(uint8_t *buffer, uint64_t block_number) { |
cholletisaik777 | 0:d6e3d1e21484 | 344 | // set read address for single block (CMD17) |
cholletisaik777 | 0:d6e3d1e21484 | 345 | if (cmd(17, block_number * cdv) != 0) { |
cholletisaik777 | 0:d6e3d1e21484 | 346 | return 1; |
cholletisaik777 | 0:d6e3d1e21484 | 347 | } |
cholletisaik777 | 0:d6e3d1e21484 | 348 | |
cholletisaik777 | 0:d6e3d1e21484 | 349 | // receive the data |
cholletisaik777 | 0:d6e3d1e21484 | 350 | read(buffer, 512); |
cholletisaik777 | 0:d6e3d1e21484 | 351 | return 0; |
cholletisaik777 | 0:d6e3d1e21484 | 352 | } |