jnlj

Dependencies:   mbed-rtos mbed

Fork of TFOX_CDMS_VR_1_0_WORKING by Team Fox

Committer:
pradeepvk2208
Date:
Thu Jul 02 08:08:53 2015 +0000
Revision:
8:48c7ddad90b7
Parent:
4:cc85cfaa2086
hi;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cholletisaik777 0:d6e3d1e21484 1 #include "SDCard.h"
cholletisaik777 0:d6e3d1e21484 2 #include "func_head.h"
cholletisaik777 0:d6e3d1e21484 3
cholletisaik777 0:d6e3d1e21484 4 SPI spi_SD(PTD6, PTD7, PTD5); // mosi, miso, sclk
pradeepvk2208 2:4c79b3dfef31 5 DigitalOut cs_SD(D2);
cholletisaik777 0:d6e3d1e21484 6
cholletisaik777 0:d6e3d1e21484 7 int count_bro;
cholletisaik777 0:d6e3d1e21484 8 int cdv;
cholletisaik777 4:cc85cfaa2086 9 uint64_t sectors;
cholletisaik777 0:d6e3d1e21484 10
cholletisaik777 4:cc85cfaa2086 11 int *FUNC_INIT_SD()
cholletisaik777 4:cc85cfaa2086 12 {
cholletisaik777 4:cc85cfaa2086 13 int sd_response[2] = {initialise_card(),disk_initialize()};
cholletisaik777 4:cc85cfaa2086 14 return sd_response;
cholletisaik777 4:cc85cfaa2086 15 }
cholletisaik777 4:cc85cfaa2086 16
cholletisaik777 4:cc85cfaa2086 17
cholletisaik777 0:d6e3d1e21484 18 int initialise_card() {
cholletisaik777 0:d6e3d1e21484 19 // Set to 100kHz for initialisation, and clock card with cs_SD = 1
cholletisaik777 0:d6e3d1e21484 20 spi_SD.frequency(100000);
cholletisaik777 0:d6e3d1e21484 21 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 22 for (int i = 0; i < 16; i++) {
cholletisaik777 0:d6e3d1e21484 23 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 24 }
cholletisaik777 0:d6e3d1e21484 25
cholletisaik777 0:d6e3d1e21484 26 // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
cholletisaik777 0:d6e3d1e21484 27 if (cmd(0, 0) != R1_IDLE_STATE) {
cholletisaik777 0:d6e3d1e21484 28 debug("No disk, or could not put SD card in to SPI idle state\r\n");
cholletisaik777 0:d6e3d1e21484 29 return SDCARD_FAIL;
cholletisaik777 0:d6e3d1e21484 30 }
cholletisaik777 0:d6e3d1e21484 31
cholletisaik777 0:d6e3d1e21484 32 // send CMD8 to determine whther it is ver 2.x
cholletisaik777 0:d6e3d1e21484 33 int r = cmd8();
cholletisaik777 0:d6e3d1e21484 34 if (r == R1_IDLE_STATE) {
cholletisaik777 0:d6e3d1e21484 35 printf("Entering v2 bro\r\n");
cholletisaik777 0:d6e3d1e21484 36 return initialise_card_v2();
cholletisaik777 0:d6e3d1e21484 37
cholletisaik777 0:d6e3d1e21484 38 } else if (r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
cholletisaik777 0:d6e3d1e21484 39 printf("Entering v1 bro\r\n");
cholletisaik777 0:d6e3d1e21484 40 return initialise_card_v1();
cholletisaik777 0:d6e3d1e21484 41
cholletisaik777 0:d6e3d1e21484 42 } else {
cholletisaik777 0:d6e3d1e21484 43 debug("Not in idle state after sending CMD8 (not an SD card?)\r\n");
cholletisaik777 0:d6e3d1e21484 44 return SDCARD_FAIL;
cholletisaik777 0:d6e3d1e21484 45 }
cholletisaik777 0:d6e3d1e21484 46 }
cholletisaik777 0:d6e3d1e21484 47
cholletisaik777 0:d6e3d1e21484 48 int initialise_card_v1() {
cholletisaik777 0:d6e3d1e21484 49 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
cholletisaik777 0:d6e3d1e21484 50 cmd(55, 0);
cholletisaik777 0:d6e3d1e21484 51 if (cmd(41, 0) == 0) {
cholletisaik777 0:d6e3d1e21484 52 printf("Yuppie v1 successful\r\n");
cholletisaik777 0:d6e3d1e21484 53 cdv = 512;
cholletisaik777 0:d6e3d1e21484 54 debug_if(SD_DBG, "\r\n\rInit: SEDCARD_V1\r\n\r");
cholletisaik777 0:d6e3d1e21484 55
cholletisaik777 0:d6e3d1e21484 56 return SDCARD_V1;
cholletisaik777 0:d6e3d1e21484 57 }
cholletisaik777 0:d6e3d1e21484 58 }
cholletisaik777 0:d6e3d1e21484 59
cholletisaik777 0:d6e3d1e21484 60 debug("Timeout waiting for v1.x card\r\n");
cholletisaik777 0:d6e3d1e21484 61 return SDCARD_FAIL;
cholletisaik777 0:d6e3d1e21484 62 }
cholletisaik777 0:d6e3d1e21484 63
cholletisaik777 0:d6e3d1e21484 64
cholletisaik777 0:d6e3d1e21484 65 int initialise_card_v2() {
cholletisaik777 0:d6e3d1e21484 66 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
cholletisaik777 0:d6e3d1e21484 67 wait_ms(50);
cholletisaik777 0:d6e3d1e21484 68 cmd58();
cholletisaik777 0:d6e3d1e21484 69 cmd(55, 0);
cholletisaik777 0:d6e3d1e21484 70 if (cmd(41, 0x40000000) == 0) {
cholletisaik777 0:d6e3d1e21484 71 printf("Yuppie,v2 successful\r\n");
cholletisaik777 0:d6e3d1e21484 72 cmd58();
cholletisaik777 0:d6e3d1e21484 73 debug_if(SD_DBG, "\r\n\rInit: SDCARD_V2\r\n\r");
cholletisaik777 0:d6e3d1e21484 74 cdv = 1;
cholletisaik777 0:d6e3d1e21484 75
cholletisaik777 0:d6e3d1e21484 76 return SDCARD_V2;
cholletisaik777 0:d6e3d1e21484 77 }
cholletisaik777 0:d6e3d1e21484 78 }
cholletisaik777 0:d6e3d1e21484 79
cholletisaik777 0:d6e3d1e21484 80 debug("Timeout waiting for v2.x card\r\n");
cholletisaik777 0:d6e3d1e21484 81 return SDCARD_FAIL;
cholletisaik777 0:d6e3d1e21484 82 }
cholletisaik777 0:d6e3d1e21484 83
cholletisaik777 0:d6e3d1e21484 84 int cmd(int cmd, int arg) {
cholletisaik777 0:d6e3d1e21484 85 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 86
cholletisaik777 0:d6e3d1e21484 87 // send a command
cholletisaik777 0:d6e3d1e21484 88 spi_SD.write(0x40 | cmd);
cholletisaik777 0:d6e3d1e21484 89 spi_SD.write(arg >> 24);
cholletisaik777 0:d6e3d1e21484 90 spi_SD.write(arg >> 16);
cholletisaik777 0:d6e3d1e21484 91 spi_SD.write(arg >> 8);
cholletisaik777 0:d6e3d1e21484 92 spi_SD.write(arg >> 0);
cholletisaik777 0:d6e3d1e21484 93 spi_SD.write(0x95);
cholletisaik777 0:d6e3d1e21484 94
cholletisaik777 0:d6e3d1e21484 95 // wait for the repsonse (response[7] == 0)
cholletisaik777 0:d6e3d1e21484 96 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
cholletisaik777 0:d6e3d1e21484 97 int response = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 98 if (!(response & 0x80)) {
cholletisaik777 0:d6e3d1e21484 99 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 100 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 101 return response;
cholletisaik777 0:d6e3d1e21484 102 }
cholletisaik777 0:d6e3d1e21484 103 }
cholletisaik777 0:d6e3d1e21484 104 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 105 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 106 return -1; // timeout
cholletisaik777 0:d6e3d1e21484 107 }
cholletisaik777 0:d6e3d1e21484 108
cholletisaik777 0:d6e3d1e21484 109
cholletisaik777 0:d6e3d1e21484 110 int cmd58() {
cholletisaik777 0:d6e3d1e21484 111 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 112 int arg = 0;
cholletisaik777 0:d6e3d1e21484 113
cholletisaik777 0:d6e3d1e21484 114 // send a command
cholletisaik777 0:d6e3d1e21484 115 spi_SD.write(0x40 | 58);
cholletisaik777 0:d6e3d1e21484 116 spi_SD.write(arg >> 24);
cholletisaik777 0:d6e3d1e21484 117 spi_SD.write(arg >> 16);
cholletisaik777 0:d6e3d1e21484 118 spi_SD.write(arg >> 8);
cholletisaik777 0:d6e3d1e21484 119 spi_SD.write(arg >> 0);
cholletisaik777 0:d6e3d1e21484 120 spi_SD.write(0x95);
cholletisaik777 0:d6e3d1e21484 121
cholletisaik777 0:d6e3d1e21484 122 // wait for the repsonse (response[7] == 0)
cholletisaik777 0:d6e3d1e21484 123 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
cholletisaik777 0:d6e3d1e21484 124 int response = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 125 if (!(response & 0x80)) {
cholletisaik777 0:d6e3d1e21484 126 int ocr = spi_SD.write(0xFF) << 24;
cholletisaik777 0:d6e3d1e21484 127 ocr |= spi_SD.write(0xFF) << 16;
cholletisaik777 0:d6e3d1e21484 128 ocr |= spi_SD.write(0xFF) << 8;
cholletisaik777 0:d6e3d1e21484 129 ocr |= spi_SD.write(0xFF) << 0;
cholletisaik777 0:d6e3d1e21484 130 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 131 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 132 return response;
cholletisaik777 0:d6e3d1e21484 133 }
cholletisaik777 0:d6e3d1e21484 134 }
cholletisaik777 0:d6e3d1e21484 135 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 136 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 137 return -1; // timeout
cholletisaik777 0:d6e3d1e21484 138 }
cholletisaik777 0:d6e3d1e21484 139
cholletisaik777 0:d6e3d1e21484 140
cholletisaik777 0:d6e3d1e21484 141 int cmd8() {
cholletisaik777 0:d6e3d1e21484 142 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 143
cholletisaik777 0:d6e3d1e21484 144 // send a command
cholletisaik777 0:d6e3d1e21484 145 spi_SD.write(0x40 | 8); // CMD8
cholletisaik777 0:d6e3d1e21484 146 spi_SD.write(0x00); // reserved
cholletisaik777 0:d6e3d1e21484 147 spi_SD.write(0x00); // reserved
cholletisaik777 0:d6e3d1e21484 148 spi_SD.write(0x01); // 3.3v
cholletisaik777 0:d6e3d1e21484 149 spi_SD.write(0xAA); // check pattern
cholletisaik777 0:d6e3d1e21484 150 spi_SD.write(0x87); // crc
cholletisaik777 0:d6e3d1e21484 151
cholletisaik777 0:d6e3d1e21484 152 // wait for the repsonse (response[7] == 0)
cholletisaik777 0:d6e3d1e21484 153 for (int i = 0; i < SD_COMMAND_TIMEOUT * 1000; i++) {
cholletisaik777 0:d6e3d1e21484 154 char response[5];
cholletisaik777 0:d6e3d1e21484 155 response[0] = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 156 if (!(response[0] & 0x80)) {
cholletisaik777 0:d6e3d1e21484 157 for (int j = 1; j < 5; j++) {
cholletisaik777 0:d6e3d1e21484 158 response[i] = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 159 }
cholletisaik777 0:d6e3d1e21484 160 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 161 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 162 return response[0];
cholletisaik777 0:d6e3d1e21484 163 }
cholletisaik777 0:d6e3d1e21484 164 }
cholletisaik777 0:d6e3d1e21484 165 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 166 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 167 return -1; // timeout
cholletisaik777 0:d6e3d1e21484 168 }
cholletisaik777 0:d6e3d1e21484 169
cholletisaik777 0:d6e3d1e21484 170 uint64_t sd_sectors() {
cholletisaik777 0:d6e3d1e21484 171 uint32_t c_size, c_size_mult, read_bl_len;
cholletisaik777 0:d6e3d1e21484 172 uint32_t block_len, mult, blocknr, capacity;
cholletisaik777 0:d6e3d1e21484 173 uint32_t hc_c_size;
cholletisaik777 0:d6e3d1e21484 174 uint64_t blocks;
cholletisaik777 0:d6e3d1e21484 175
cholletisaik777 0:d6e3d1e21484 176 // CMD9, Response R2 (R1 byte + 16-byte block read)
cholletisaik777 0:d6e3d1e21484 177 if (cmdx(9, 0) != 0) {
cholletisaik777 0:d6e3d1e21484 178 debug("Didn't get a response from the disk\r\n");
cholletisaik777 0:d6e3d1e21484 179 return 0;
cholletisaik777 0:d6e3d1e21484 180 }
cholletisaik777 0:d6e3d1e21484 181
cholletisaik777 0:d6e3d1e21484 182 uint8_t csd[16];
cholletisaik777 0:d6e3d1e21484 183 if (read(csd, 16) != 0) {
cholletisaik777 0:d6e3d1e21484 184 debug("Couldn't read csd response from disk\r\n");
cholletisaik777 0:d6e3d1e21484 185 return 0;
cholletisaik777 0:d6e3d1e21484 186 }
cholletisaik777 0:d6e3d1e21484 187
cholletisaik777 0:d6e3d1e21484 188 // csd_structure : csd[127:126]
cholletisaik777 0:d6e3d1e21484 189 // c_size : csd[73:62]
cholletisaik777 0:d6e3d1e21484 190 // c_size_mult : csd[49:47]
cholletisaik777 0:d6e3d1e21484 191 // read_bl_len : csd[83:80] - the *maximum* read block length
cholletisaik777 0:d6e3d1e21484 192
cholletisaik777 0:d6e3d1e21484 193 int csd_structure = ext_bits(csd, 127, 126);
cholletisaik777 0:d6e3d1e21484 194
cholletisaik777 0:d6e3d1e21484 195 switch (csd_structure) {
cholletisaik777 0:d6e3d1e21484 196 case 0:
cholletisaik777 0:d6e3d1e21484 197 cdv = 512;
cholletisaik777 0:d6e3d1e21484 198 c_size = ext_bits(csd, 73, 62);
cholletisaik777 0:d6e3d1e21484 199 c_size_mult = ext_bits(csd, 49, 47);
cholletisaik777 0:d6e3d1e21484 200 read_bl_len = ext_bits(csd, 83, 80);
cholletisaik777 0:d6e3d1e21484 201
cholletisaik777 0:d6e3d1e21484 202 block_len = 1 << read_bl_len;
cholletisaik777 0:d6e3d1e21484 203 mult = 1 << (c_size_mult + 2);
cholletisaik777 0:d6e3d1e21484 204 blocknr = (c_size + 1) * mult;
cholletisaik777 0:d6e3d1e21484 205 capacity = blocknr * block_len;
cholletisaik777 0:d6e3d1e21484 206 blocks = capacity / 512;
cholletisaik777 0:d6e3d1e21484 207 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 208 break;
cholletisaik777 0:d6e3d1e21484 209
cholletisaik777 0:d6e3d1e21484 210 case 1:
cholletisaik777 0:d6e3d1e21484 211 cdv = 1;
cholletisaik777 0:d6e3d1e21484 212 hc_c_size = ext_bits(csd, 63, 48);
cholletisaik777 0:d6e3d1e21484 213 blocks = (hc_c_size+1)*1024;
cholletisaik777 0:d6e3d1e21484 214 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 215 break;
cholletisaik777 0:d6e3d1e21484 216
cholletisaik777 0:d6e3d1e21484 217 default:
cholletisaik777 0:d6e3d1e21484 218 debug("CSD struct unsupported\r\r\n");
cholletisaik777 0:d6e3d1e21484 219 return 0;
cholletisaik777 0:d6e3d1e21484 220 };
cholletisaik777 0:d6e3d1e21484 221 return blocks;
cholletisaik777 0:d6e3d1e21484 222 }
cholletisaik777 0:d6e3d1e21484 223
cholletisaik777 0:d6e3d1e21484 224 int cmdx(int cmd, int arg) {
cholletisaik777 0:d6e3d1e21484 225 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 226
cholletisaik777 0:d6e3d1e21484 227 // send a command
cholletisaik777 0:d6e3d1e21484 228 spi_SD.write(0x40 | cmd);
cholletisaik777 0:d6e3d1e21484 229 spi_SD.write(arg >> 24);
cholletisaik777 0:d6e3d1e21484 230 spi_SD.write(arg >> 16);
cholletisaik777 0:d6e3d1e21484 231 spi_SD.write(arg >> 8);
cholletisaik777 0:d6e3d1e21484 232 spi_SD.write(arg >> 0);
cholletisaik777 0:d6e3d1e21484 233 spi_SD.write(0x95);
cholletisaik777 0:d6e3d1e21484 234
cholletisaik777 0:d6e3d1e21484 235 // wait for the repsonse (response[7] == 0)
cholletisaik777 0:d6e3d1e21484 236 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
cholletisaik777 0:d6e3d1e21484 237 int response = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 238 if (!(response & 0x80)) {
cholletisaik777 0:d6e3d1e21484 239 return response;
cholletisaik777 0:d6e3d1e21484 240 }
cholletisaik777 0:d6e3d1e21484 241 }
cholletisaik777 0:d6e3d1e21484 242 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 243 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 244 return -1; // timeout
cholletisaik777 0:d6e3d1e21484 245 }
cholletisaik777 0:d6e3d1e21484 246
cholletisaik777 0:d6e3d1e21484 247
cholletisaik777 0:d6e3d1e21484 248 int read(uint8_t *buffer, uint32_t length) {
cholletisaik777 0:d6e3d1e21484 249 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 250
cholletisaik777 0:d6e3d1e21484 251 // read until start byte (0xFF)
cholletisaik777 0:d6e3d1e21484 252 while (spi_SD.write(0xFF) != 0xFE);
cholletisaik777 0:d6e3d1e21484 253
cholletisaik777 0:d6e3d1e21484 254 // read data
cholletisaik777 0:d6e3d1e21484 255 for (int i = 0; i < length; i++) {
cholletisaik777 0:d6e3d1e21484 256 buffer[i] = spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 257 }
cholletisaik777 0:d6e3d1e21484 258 spi_SD.write(0xFF); // checksum
cholletisaik777 0:d6e3d1e21484 259 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 260
cholletisaik777 0:d6e3d1e21484 261 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 262 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 263 return 0;
cholletisaik777 0:d6e3d1e21484 264 }
cholletisaik777 0:d6e3d1e21484 265
cholletisaik777 0:d6e3d1e21484 266 static uint32_t ext_bits(unsigned char *data, int msb, int lsb) {
cholletisaik777 0:d6e3d1e21484 267 uint32_t bits = 0;
cholletisaik777 0:d6e3d1e21484 268 uint32_t size = 1 + msb - lsb;
cholletisaik777 0:d6e3d1e21484 269 for (int i = 0; i < size; i++) {
cholletisaik777 0:d6e3d1e21484 270 uint32_t position = lsb + i;
cholletisaik777 0:d6e3d1e21484 271 uint32_t byte = 15 - (position >> 3);
cholletisaik777 0:d6e3d1e21484 272 uint32_t bit = position & 0x7;
cholletisaik777 0:d6e3d1e21484 273 uint32_t value = (data[byte] >> bit) & 1;
cholletisaik777 0:d6e3d1e21484 274 bits |= value << i;
cholletisaik777 0:d6e3d1e21484 275 }
cholletisaik777 0:d6e3d1e21484 276 return bits;
cholletisaik777 0:d6e3d1e21484 277 }
cholletisaik777 0:d6e3d1e21484 278
cholletisaik777 0:d6e3d1e21484 279 int disk_initialize() {
cholletisaik777 0:d6e3d1e21484 280 int i = initialise_card();
cholletisaik777 0:d6e3d1e21484 281 debug_if(SD_DBG, "init card = %d\r\n", i);
cholletisaik777 0:d6e3d1e21484 282 sectors = sd_sectors();
cholletisaik777 0:d6e3d1e21484 283
cholletisaik777 0:d6e3d1e21484 284 // Set block length to 512 (CMD16)
cholletisaik777 0:d6e3d1e21484 285 if (cmd(16, 512) != 0) {
cholletisaik777 0:d6e3d1e21484 286 debug("Set 512-byte block timed out\r\n");
cholletisaik777 0:d6e3d1e21484 287 return 1;
cholletisaik777 0:d6e3d1e21484 288 }
cholletisaik777 0:d6e3d1e21484 289 else
cholletisaik777 0:d6e3d1e21484 290 {
cholletisaik777 0:d6e3d1e21484 291 printf("Hey,block init succesful\r\n");
cholletisaik777 0:d6e3d1e21484 292 }
cholletisaik777 0:d6e3d1e21484 293
cholletisaik777 0:d6e3d1e21484 294 spi_SD.frequency(1000000); // Set to 1MHz for data transfer
cholletisaik777 0:d6e3d1e21484 295 return 0;
cholletisaik777 0:d6e3d1e21484 296 }
cholletisaik777 0:d6e3d1e21484 297
cholletisaik777 4:cc85cfaa2086 298 int FUNC_WR_SD(const uint8_t *buffer, uint64_t block_number)
cholletisaik777 0:d6e3d1e21484 299
cholletisaik777 0:d6e3d1e21484 300 {
cholletisaik777 0:d6e3d1e21484 301 // set write address for single block (CMD24)
cholletisaik777 0:d6e3d1e21484 302 if (cmd(24, block_number * cdv) != 0) {
cholletisaik777 0:d6e3d1e21484 303 return 1;
cholletisaik777 0:d6e3d1e21484 304 }
cholletisaik777 0:d6e3d1e21484 305
cholletisaik777 0:d6e3d1e21484 306 // send the data block
cholletisaik777 0:d6e3d1e21484 307 write(buffer, 512);
cholletisaik777 0:d6e3d1e21484 308 printf("Written Successfully bro \r\n");
cholletisaik777 0:d6e3d1e21484 309 return 0;
cholletisaik777 0:d6e3d1e21484 310 }
cholletisaik777 0:d6e3d1e21484 311
cholletisaik777 0:d6e3d1e21484 312 int write(const uint8_t*buffer, uint32_t length) {
cholletisaik777 0:d6e3d1e21484 313 cs_SD = 0;
cholletisaik777 0:d6e3d1e21484 314
cholletisaik777 0:d6e3d1e21484 315 // indicate start of block
cholletisaik777 0:d6e3d1e21484 316 spi_SD.write(0xFE);
cholletisaik777 0:d6e3d1e21484 317
cholletisaik777 0:d6e3d1e21484 318 // write the data
cholletisaik777 0:d6e3d1e21484 319 for (int i = 0; i < length; i++) {
cholletisaik777 0:d6e3d1e21484 320 spi_SD.write(buffer[i]);
cholletisaik777 0:d6e3d1e21484 321 }
cholletisaik777 0:d6e3d1e21484 322
cholletisaik777 0:d6e3d1e21484 323 // write the checksum
cholletisaik777 0:d6e3d1e21484 324 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 325 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 326
cholletisaik777 0:d6e3d1e21484 327 // check the response token
cholletisaik777 0:d6e3d1e21484 328 if ((spi_SD.write(0xFF) & 0x1F) != 0x05) {
cholletisaik777 0:d6e3d1e21484 329 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 330 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 331 return 1;
cholletisaik777 0:d6e3d1e21484 332 }
cholletisaik777 0:d6e3d1e21484 333
cholletisaik777 0:d6e3d1e21484 334 // wait for write to finish
cholletisaik777 0:d6e3d1e21484 335 while (spi_SD.write(0xFF) == 0);
cholletisaik777 0:d6e3d1e21484 336
cholletisaik777 0:d6e3d1e21484 337 cs_SD = 1;
cholletisaik777 0:d6e3d1e21484 338 spi_SD.write(0xFF);
cholletisaik777 0:d6e3d1e21484 339 return 0;
cholletisaik777 0:d6e3d1e21484 340 }
cholletisaik777 0:d6e3d1e21484 341
cholletisaik777 4:cc85cfaa2086 342 int FUNC_RD_SD(uint8_t *buffer, uint64_t block_number) {
cholletisaik777 0:d6e3d1e21484 343 // set read address for single block (CMD17)
cholletisaik777 0:d6e3d1e21484 344 if (cmd(17, block_number * cdv) != 0) {
cholletisaik777 0:d6e3d1e21484 345 return 1;
cholletisaik777 0:d6e3d1e21484 346 }
cholletisaik777 0:d6e3d1e21484 347
cholletisaik777 0:d6e3d1e21484 348 // receive the data
cholletisaik777 0:d6e3d1e21484 349 read(buffer, 512);
cholletisaik777 0:d6e3d1e21484 350 return 0;
cholletisaik777 0:d6e3d1e21484 351 }