shubham c / Mbed 2 deprecated CDMS_CODE

Repository for CDMS code

Dependencies:   SimpleDMA mbed-rtos mbed eeprom

Fork of COM_MNG_TMTC_SIMPLE by Shreesha S

SDC_init.h@1:a0055b3280c8, 2015-12-14 (annotated)

Committer:
shreeshas95
Date:
Mon Dec 14 12:04:01 2015 +0000
Revision:
1:a0055b3280c8
Child:
55:39e59903bc3a
Child:
69:20f09a0c3fd2
Simple working version code

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shreeshas95 1:a0055b3280c8 1 //Serial PC(USBTX, USBRX);
shreeshas95 1:a0055b3280c8 2 //DigitalOut cs_SDCard(PTE22);
shreeshas95 1:a0055b3280c8 3 DigitalOut cs_SDCard(PTB1);
shreeshas95 1:a0055b3280c8 4
shreeshas95 1:a0055b3280c8 5 #define SD_COMMAND_TIMEOUT 5000
shreeshas95 1:a0055b3280c8 6
shreeshas95 1:a0055b3280c8 7 #define SD_DBG 0
shreeshas95 1:a0055b3280c8 8
shreeshas95 1:a0055b3280c8 9 #define R1_IDLE_STATE (1 << 0)
shreeshas95 1:a0055b3280c8 10 #define R1_ERASE_RESET (1 << 1)
shreeshas95 1:a0055b3280c8 11 #define R1_ILLEGAL_COMMAND (1 << 2)
shreeshas95 1:a0055b3280c8 12 #define R1_COM_CRC_ERROR (1 << 3)
shreeshas95 1:a0055b3280c8 13 #define R1_ERASE_SEQUENCE_ERROR (1 << 4)
shreeshas95 1:a0055b3280c8 14 #define R1_ADDRESS_ERROR (1 << 5)
shreeshas95 1:a0055b3280c8 15 #define R1_PARAMETER_ERROR (1 << 6)
shreeshas95 1:a0055b3280c8 16 //SPI spi(PTA16, PTA17, PTA15); // mosi, miso, sclk
shreeshas95 1:a0055b3280c8 17
shreeshas95 1:a0055b3280c8 18
shreeshas95 1:a0055b3280c8 19 int initialise_card();
shreeshas95 1:a0055b3280c8 20 int initialise_card_v1();
shreeshas95 1:a0055b3280c8 21 int initialise_card_v2();
shreeshas95 1:a0055b3280c8 22 int disk_initialize();
shreeshas95 1:a0055b3280c8 23 //int disk_write(const uint8_t *, uint64_t);
shreeshas95 1:a0055b3280c8 24
shreeshas95 1:a0055b3280c8 25 int disk_erase(int,int);
shreeshas95 1:a0055b3280c8 26
shreeshas95 1:a0055b3280c8 27 uint64_t sd_sectors();
shreeshas95 1:a0055b3280c8 28 uint64_t sectors;
shreeshas95 1:a0055b3280c8 29
shreeshas95 1:a0055b3280c8 30 int cmd(int, int);
shreeshas95 1:a0055b3280c8 31 int cmd58();
shreeshas95 1:a0055b3280c8 32 int cmdx(int, int);
shreeshas95 1:a0055b3280c8 33 int cmd8();
shreeshas95 1:a0055b3280c8 34 int read(uint8_t*, uint32_t );
shreeshas95 1:a0055b3280c8 35 int write(const uint8_t*, uint32_t );
shreeshas95 1:a0055b3280c8 36 static uint32_t ext_bits(unsigned char *, int , int );
shreeshas95 1:a0055b3280c8 37
shreeshas95 1:a0055b3280c8 38 int cdv;
shreeshas95 1:a0055b3280c8 39
shreeshas95 1:a0055b3280c8 40 #define SDCARD_FAIL 0
shreeshas95 1:a0055b3280c8 41 #define SDCARD_V1 1
shreeshas95 1:a0055b3280c8 42 #define SDCARD_V2 2
shreeshas95 1:a0055b3280c8 43 #define SDCARD_V2HC 3
shreeshas95 1:a0055b3280c8 44
shreeshas95 1:a0055b3280c8 45 int count_bro;
shreeshas95 1:a0055b3280c8 46 int i;
shreeshas95 1:a0055b3280c8 47 int random[1000];
shreeshas95 1:a0055b3280c8 48
shreeshas95 1:a0055b3280c8 49
shreeshas95 1:a0055b3280c8 50 void initialisation_SDCard(){
shreeshas95 1:a0055b3280c8 51 //*******************************
shreeshas95 1:a0055b3280c8 52
shreeshas95 1:a0055b3280c8 53 // cs_adf =1;
shreeshas95 1:a0055b3280c8 54
shreeshas95 1:a0055b3280c8 55 //**************************
shreeshas95 1:a0055b3280c8 56
shreeshas95 1:a0055b3280c8 57 // start_block_num =10 ; // Read from TC
shreeshas95 1:a0055b3280c8 58 // end_block_num =Science_TMframe::SDC_address ; // Read from TC
shreeshas95 1:a0055b3280c8 59 // printf("welcome\n");
shreeshas95 1:a0055b3280c8 60 initialise_card();
shreeshas95 1:a0055b3280c8 61 int result= initialise_card();
shreeshas95 1:a0055b3280c8 62 // printf("initialise card result=%d\n",result);
shreeshas95 1:a0055b3280c8 63 disk_initialize();
shreeshas95 1:a0055b3280c8 64 }
shreeshas95 1:a0055b3280c8 65
shreeshas95 1:a0055b3280c8 66
shreeshas95 1:a0055b3280c8 67
shreeshas95 1:a0055b3280c8 68
shreeshas95 1:a0055b3280c8 69 int initialise_card()
shreeshas95 1:a0055b3280c8 70 {
shreeshas95 1:a0055b3280c8 71 // Set to 100kHz for initialisation, and clock card with cs_SDCard = 1
shreeshas95 1:a0055b3280c8 72 spi.frequency(100000);
shreeshas95 1:a0055b3280c8 73 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 74 for (int i = 0; i < 16; i++) {
shreeshas95 1:a0055b3280c8 75 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 76 }
shreeshas95 1:a0055b3280c8 77
shreeshas95 1:a0055b3280c8 78 // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
shreeshas95 1:a0055b3280c8 79 if (cmd(0, 0) != R1_IDLE_STATE) {
shreeshas95 1:a0055b3280c8 80 debug("No disk, or could not put SD card in to SPI idle state\n");
shreeshas95 1:a0055b3280c8 81 return SDCARD_FAIL;
shreeshas95 1:a0055b3280c8 82 }
shreeshas95 1:a0055b3280c8 83
shreeshas95 1:a0055b3280c8 84 // send CMD8 to determine whther it is ver 2.x
shreeshas95 1:a0055b3280c8 85 int r = cmd8();
shreeshas95 1:a0055b3280c8 86 if (r == R1_IDLE_STATE) {
shreeshas95 1:a0055b3280c8 87 // printf("Entering v2 bro\n");
shreeshas95 1:a0055b3280c8 88 return initialise_card_v2();
shreeshas95 1:a0055b3280c8 89
shreeshas95 1:a0055b3280c8 90 } else if (r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
shreeshas95 1:a0055b3280c8 91 printf("Entering v1 bro\n");
shreeshas95 1:a0055b3280c8 92 return initialise_card_v1();
shreeshas95 1:a0055b3280c8 93
shreeshas95 1:a0055b3280c8 94 } else {
shreeshas95 1:a0055b3280c8 95 debug("Not in idle state after sending CMD8 (not an SD card?)\n");
shreeshas95 1:a0055b3280c8 96 return SDCARD_FAIL;
shreeshas95 1:a0055b3280c8 97 }
shreeshas95 1:a0055b3280c8 98 }
shreeshas95 1:a0055b3280c8 99
shreeshas95 1:a0055b3280c8 100 int initialise_card_v1()
shreeshas95 1:a0055b3280c8 101 {
shreeshas95 1:a0055b3280c8 102 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
shreeshas95 1:a0055b3280c8 103 cmd(55, 0);
shreeshas95 1:a0055b3280c8 104 if (cmd(41, 0) == 0) {
shreeshas95 1:a0055b3280c8 105 // printf("Yuppie v1 successful\n");
shreeshas95 1:a0055b3280c8 106 cdv = 512;
shreeshas95 1:a0055b3280c8 107 debug_if(SD_DBG, "\n\rInit: SEDCARD_V1\n\r");
shreeshas95 1:a0055b3280c8 108
shreeshas95 1:a0055b3280c8 109 return SDCARD_V1;
shreeshas95 1:a0055b3280c8 110 }
shreeshas95 1:a0055b3280c8 111 }
shreeshas95 1:a0055b3280c8 112
shreeshas95 1:a0055b3280c8 113 debug("Timeout waiting for v1.x card\n");
shreeshas95 1:a0055b3280c8 114 return SDCARD_FAIL;
shreeshas95 1:a0055b3280c8 115 }
shreeshas95 1:a0055b3280c8 116
shreeshas95 1:a0055b3280c8 117
shreeshas95 1:a0055b3280c8 118 int initialise_card_v2()
shreeshas95 1:a0055b3280c8 119 {
shreeshas95 1:a0055b3280c8 120 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
shreeshas95 1:a0055b3280c8 121 wait_ms(50);
shreeshas95 1:a0055b3280c8 122 cmd58();
shreeshas95 1:a0055b3280c8 123 cmd(55, 0);
shreeshas95 1:a0055b3280c8 124 if (cmd(41, 0x40000000) == 0) {
shreeshas95 1:a0055b3280c8 125 // printf("Yuppie,v2 successful\n");
shreeshas95 1:a0055b3280c8 126 cmd58();
shreeshas95 1:a0055b3280c8 127 debug_if(SD_DBG, "\n\rInit: SDCARD_V2\n\r");
shreeshas95 1:a0055b3280c8 128 cdv = 1;
shreeshas95 1:a0055b3280c8 129
shreeshas95 1:a0055b3280c8 130 return SDCARD_V2;
shreeshas95 1:a0055b3280c8 131 }
shreeshas95 1:a0055b3280c8 132 }
shreeshas95 1:a0055b3280c8 133
shreeshas95 1:a0055b3280c8 134 debug("Timeout waiting for v2.x card\n");
shreeshas95 1:a0055b3280c8 135 return SDCARD_FAIL;
shreeshas95 1:a0055b3280c8 136 }
shreeshas95 1:a0055b3280c8 137
shreeshas95 1:a0055b3280c8 138 int cmd(int cmd, int arg)
shreeshas95 1:a0055b3280c8 139 {
shreeshas95 1:a0055b3280c8 140 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 141
shreeshas95 1:a0055b3280c8 142 // send a command
shreeshas95 1:a0055b3280c8 143 spi.write(0x40 | cmd);
shreeshas95 1:a0055b3280c8 144 spi.write(arg >> 24);
shreeshas95 1:a0055b3280c8 145 spi.write(arg >> 16);
shreeshas95 1:a0055b3280c8 146 spi.write(arg >> 8);
shreeshas95 1:a0055b3280c8 147 spi.write(arg >> 0);
shreeshas95 1:a0055b3280c8 148 spi.write(0x95);
shreeshas95 1:a0055b3280c8 149
shreeshas95 1:a0055b3280c8 150 // wait for the repsonse (response[7] == 0)
shreeshas95 1:a0055b3280c8 151 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
shreeshas95 1:a0055b3280c8 152 int response = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 153 if (!(response & 0x80)) {
shreeshas95 1:a0055b3280c8 154 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 155 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 156 return response;
shreeshas95 1:a0055b3280c8 157 }
shreeshas95 1:a0055b3280c8 158 }
shreeshas95 1:a0055b3280c8 159 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 160 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 161 return -1; // timeout
shreeshas95 1:a0055b3280c8 162 }
shreeshas95 1:a0055b3280c8 163
shreeshas95 1:a0055b3280c8 164
shreeshas95 1:a0055b3280c8 165 int cmd58()
shreeshas95 1:a0055b3280c8 166 {
shreeshas95 1:a0055b3280c8 167 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 168 int arg = 0;
shreeshas95 1:a0055b3280c8 169
shreeshas95 1:a0055b3280c8 170 // send a command
shreeshas95 1:a0055b3280c8 171 spi.write(0x40 | 58);
shreeshas95 1:a0055b3280c8 172 spi.write(arg >> 24);
shreeshas95 1:a0055b3280c8 173 spi.write(arg >> 16);
shreeshas95 1:a0055b3280c8 174 spi.write(arg >> 8);
shreeshas95 1:a0055b3280c8 175 spi.write(arg >> 0);
shreeshas95 1:a0055b3280c8 176 spi.write(0x95);
shreeshas95 1:a0055b3280c8 177
shreeshas95 1:a0055b3280c8 178 // wait for the repsonse (response[7] == 0)
shreeshas95 1:a0055b3280c8 179 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
shreeshas95 1:a0055b3280c8 180 int response = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 181 if (!(response & 0x80)) {
shreeshas95 1:a0055b3280c8 182 int ocr = spi.write(0xFF) << 24;
shreeshas95 1:a0055b3280c8 183 ocr |= spi.write(0xFF) << 16;
shreeshas95 1:a0055b3280c8 184 ocr |= spi.write(0xFF) << 8;
shreeshas95 1:a0055b3280c8 185 ocr |= spi.write(0xFF) << 0;
shreeshas95 1:a0055b3280c8 186 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 187 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 188 return response;
shreeshas95 1:a0055b3280c8 189 }
shreeshas95 1:a0055b3280c8 190 }
shreeshas95 1:a0055b3280c8 191 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 192 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 193 return -1; // timeout
shreeshas95 1:a0055b3280c8 194 }
shreeshas95 1:a0055b3280c8 195
shreeshas95 1:a0055b3280c8 196
shreeshas95 1:a0055b3280c8 197 int cmd8()
shreeshas95 1:a0055b3280c8 198 {
shreeshas95 1:a0055b3280c8 199 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 200
shreeshas95 1:a0055b3280c8 201 // send a command
shreeshas95 1:a0055b3280c8 202 spi.write(0x40 | 8); // CMD8
shreeshas95 1:a0055b3280c8 203 spi.write(0x00); // reserved
shreeshas95 1:a0055b3280c8 204 spi.write(0x00); // reserved
shreeshas95 1:a0055b3280c8 205 spi.write(0x01); // 3.3v
shreeshas95 1:a0055b3280c8 206 spi.write(0xAA); // check pattern
shreeshas95 1:a0055b3280c8 207 spi.write(0x87); // crc
shreeshas95 1:a0055b3280c8 208
shreeshas95 1:a0055b3280c8 209 // wait for the repsonse (response[7] == 0)
shreeshas95 1:a0055b3280c8 210 for (int i = 0; i < SD_COMMAND_TIMEOUT * 1000; i++) {
shreeshas95 1:a0055b3280c8 211 char response[5];
shreeshas95 1:a0055b3280c8 212 response[0] = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 213 if (!(response[0] & 0x80)) {
shreeshas95 1:a0055b3280c8 214 for (int j = 1; j < 5; j++) {
shreeshas95 1:a0055b3280c8 215 response[i] = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 216 }
shreeshas95 1:a0055b3280c8 217 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 218 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 219 return response[0];
shreeshas95 1:a0055b3280c8 220 }
shreeshas95 1:a0055b3280c8 221 }
shreeshas95 1:a0055b3280c8 222 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 223 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 224 return -1; // timeout
shreeshas95 1:a0055b3280c8 225 }
shreeshas95 1:a0055b3280c8 226
shreeshas95 1:a0055b3280c8 227 uint64_t sd_sectors()
shreeshas95 1:a0055b3280c8 228 {
shreeshas95 1:a0055b3280c8 229 uint32_t c_size, c_size_mult, read_bl_len;
shreeshas95 1:a0055b3280c8 230 uint32_t block_len, mult, blocknr, capacity;
shreeshas95 1:a0055b3280c8 231 uint32_t hc_c_size;
shreeshas95 1:a0055b3280c8 232 uint64_t blocks;
shreeshas95 1:a0055b3280c8 233
shreeshas95 1:a0055b3280c8 234 // CMD9, Response R2 (R1 byte + 16-byte block read)
shreeshas95 1:a0055b3280c8 235 if (cmdx(9, 0) != 0) {
shreeshas95 1:a0055b3280c8 236 debug("Didn't get a response from the disk\n");
shreeshas95 1:a0055b3280c8 237 return 0;
shreeshas95 1:a0055b3280c8 238 }
shreeshas95 1:a0055b3280c8 239
shreeshas95 1:a0055b3280c8 240 uint8_t csd[16];
shreeshas95 1:a0055b3280c8 241 if (read(csd, 16) != 0) {
shreeshas95 1:a0055b3280c8 242 debug("Couldn't read csd response from disk\n");
shreeshas95 1:a0055b3280c8 243 return 0;
shreeshas95 1:a0055b3280c8 244 }
shreeshas95 1:a0055b3280c8 245
shreeshas95 1:a0055b3280c8 246 // csd_structure : csd[127:126]
shreeshas95 1:a0055b3280c8 247 // c_size : csd[73:62]
shreeshas95 1:a0055b3280c8 248 // c_size_mult : csd[49:47]
shreeshas95 1:a0055b3280c8 249 // read_bl_len : csd[83:80] - the *maximum* read block length
shreeshas95 1:a0055b3280c8 250
shreeshas95 1:a0055b3280c8 251 int csd_structure = ext_bits(csd, 127, 126);
shreeshas95 1:a0055b3280c8 252
shreeshas95 1:a0055b3280c8 253 switch (csd_structure) {
shreeshas95 1:a0055b3280c8 254 case 0:
shreeshas95 1:a0055b3280c8 255 cdv = 512;
shreeshas95 1:a0055b3280c8 256 c_size = ext_bits(csd, 73, 62);
shreeshas95 1:a0055b3280c8 257 c_size_mult = ext_bits(csd, 49, 47);
shreeshas95 1:a0055b3280c8 258 read_bl_len = ext_bits(csd, 83, 80);
shreeshas95 1:a0055b3280c8 259
shreeshas95 1:a0055b3280c8 260 block_len = 1 << read_bl_len;
shreeshas95 1:a0055b3280c8 261 mult = 1 << (c_size_mult + 2);
shreeshas95 1:a0055b3280c8 262 blocknr = (c_size + 1) * mult;
shreeshas95 1:a0055b3280c8 263 capacity = blocknr * block_len;
shreeshas95 1:a0055b3280c8 264 blocks = capacity / 512;
shreeshas95 1:a0055b3280c8 265 debug_if(SD_DBG, "\n\rSDCard\n\rc_size: %d \n\rcapacity: %ld \n\rsectors: %lld\n\r", c_size, capacity, blocks);
shreeshas95 1:a0055b3280c8 266 break;
shreeshas95 1:a0055b3280c8 267
shreeshas95 1:a0055b3280c8 268 case 1:
shreeshas95 1:a0055b3280c8 269 cdv = 1;
shreeshas95 1:a0055b3280c8 270 hc_c_size = ext_bits(csd, 63, 48);
shreeshas95 1:a0055b3280c8 271 blocks = (hc_c_size+1)*1024;
shreeshas95 1:a0055b3280c8 272 debug_if(SD_DBG, "\n\rSDHC Card \n\rhc_c_size: %d\n\rcapacity: %lld \n\rsectors: %lld\n\r", hc_c_size, blocks*512, blocks);
shreeshas95 1:a0055b3280c8 273 break;
shreeshas95 1:a0055b3280c8 274
shreeshas95 1:a0055b3280c8 275 default:
shreeshas95 1:a0055b3280c8 276 debug("CSD struct unsupported\r\n");
shreeshas95 1:a0055b3280c8 277 return 0;
shreeshas95 1:a0055b3280c8 278 };
shreeshas95 1:a0055b3280c8 279 return blocks;
shreeshas95 1:a0055b3280c8 280 }
shreeshas95 1:a0055b3280c8 281
shreeshas95 1:a0055b3280c8 282 int cmdx(int cmd, int arg)
shreeshas95 1:a0055b3280c8 283 {
shreeshas95 1:a0055b3280c8 284 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 285
shreeshas95 1:a0055b3280c8 286 // send a command
shreeshas95 1:a0055b3280c8 287 spi.write(0x40 | cmd);
shreeshas95 1:a0055b3280c8 288 spi.write(arg >> 24);
shreeshas95 1:a0055b3280c8 289 spi.write(arg >> 16);
shreeshas95 1:a0055b3280c8 290 spi.write(arg >> 8);
shreeshas95 1:a0055b3280c8 291 spi.write(arg >> 0);
shreeshas95 1:a0055b3280c8 292 spi.write(0x95);
shreeshas95 1:a0055b3280c8 293
shreeshas95 1:a0055b3280c8 294 // wait for the repsonse (response[7] == 0)
shreeshas95 1:a0055b3280c8 295 for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
shreeshas95 1:a0055b3280c8 296 int response = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 297 if (!(response & 0x80)) {
shreeshas95 1:a0055b3280c8 298 return response;
shreeshas95 1:a0055b3280c8 299 }
shreeshas95 1:a0055b3280c8 300 }
shreeshas95 1:a0055b3280c8 301 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 302 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 303 return -1; // timeout
shreeshas95 1:a0055b3280c8 304 }
shreeshas95 1:a0055b3280c8 305
shreeshas95 1:a0055b3280c8 306 static uint32_t ext_bits(unsigned char *data, int msb, int lsb)
shreeshas95 1:a0055b3280c8 307 {
shreeshas95 1:a0055b3280c8 308 uint32_t bits = 0;
shreeshas95 1:a0055b3280c8 309 uint32_t size = 1 + msb - lsb;
shreeshas95 1:a0055b3280c8 310 for (int i = 0; i < size; i++) {
shreeshas95 1:a0055b3280c8 311 uint32_t position = lsb + i;
shreeshas95 1:a0055b3280c8 312 uint32_t byte = 15 - (position >> 3);
shreeshas95 1:a0055b3280c8 313 uint32_t bit = position & 0x7;
shreeshas95 1:a0055b3280c8 314 uint32_t value = (data[byte] >> bit) & 1;
shreeshas95 1:a0055b3280c8 315 bits |= value << i;
shreeshas95 1:a0055b3280c8 316 }
shreeshas95 1:a0055b3280c8 317 return bits;
shreeshas95 1:a0055b3280c8 318 }
shreeshas95 1:a0055b3280c8 319
shreeshas95 1:a0055b3280c8 320 int disk_initialize()
shreeshas95 1:a0055b3280c8 321 {
shreeshas95 1:a0055b3280c8 322 int i = initialise_card();
shreeshas95 1:a0055b3280c8 323 debug_if(SD_DBG, "init card = %d\n", i);
shreeshas95 1:a0055b3280c8 324 sectors = sd_sectors();
shreeshas95 1:a0055b3280c8 325
shreeshas95 1:a0055b3280c8 326 // Set block length to 512 (CMD16)
shreeshas95 1:a0055b3280c8 327 if (cmd(16, 512) != 0) {
shreeshas95 1:a0055b3280c8 328 debug("Set 512-byte block timed out\n");
shreeshas95 1:a0055b3280c8 329 return 1;
shreeshas95 1:a0055b3280c8 330 } else {
shreeshas95 1:a0055b3280c8 331 // printf("Hey,block init succesful\n");
shreeshas95 1:a0055b3280c8 332 }
shreeshas95 1:a0055b3280c8 333
shreeshas95 1:a0055b3280c8 334 spi.frequency(1000000); // Set to 1MHz for data transfer
shreeshas95 1:a0055b3280c8 335 return 0;
shreeshas95 1:a0055b3280c8 336 }
shreeshas95 1:a0055b3280c8 337
shreeshas95 1:a0055b3280c8 338 int disk_write(const uint8_t *buffer, uint64_t block_number)
shreeshas95 1:a0055b3280c8 339
shreeshas95 1:a0055b3280c8 340 {
shreeshas95 1:a0055b3280c8 341 // set write address for single block (CMD24)
shreeshas95 1:a0055b3280c8 342 if (cmd(24, block_number * cdv) != 0) {
shreeshas95 1:a0055b3280c8 343 return 1;
shreeshas95 1:a0055b3280c8 344 }
shreeshas95 1:a0055b3280c8 345
shreeshas95 1:a0055b3280c8 346 // send the data block
shreeshas95 1:a0055b3280c8 347 write(buffer, 512);
shreeshas95 1:a0055b3280c8 348 //printf("Written Successfully bro \n");
shreeshas95 1:a0055b3280c8 349 return 0;
shreeshas95 1:a0055b3280c8 350 }
shreeshas95 1:a0055b3280c8 351
shreeshas95 1:a0055b3280c8 352 int write(const uint8_t*buffer, uint32_t length)
shreeshas95 1:a0055b3280c8 353 {
shreeshas95 1:a0055b3280c8 354 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 355
shreeshas95 1:a0055b3280c8 356 // indicate start of block
shreeshas95 1:a0055b3280c8 357 spi.write(0xFE);
shreeshas95 1:a0055b3280c8 358
shreeshas95 1:a0055b3280c8 359 // write the data
shreeshas95 1:a0055b3280c8 360 for (int i = 0; i < length; i++) {
shreeshas95 1:a0055b3280c8 361 spi.write(buffer[i]);
shreeshas95 1:a0055b3280c8 362 }
shreeshas95 1:a0055b3280c8 363
shreeshas95 1:a0055b3280c8 364 // write the checksum
shreeshas95 1:a0055b3280c8 365 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 366 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 367
shreeshas95 1:a0055b3280c8 368 // check the response token
shreeshas95 1:a0055b3280c8 369 if ((spi.write(0xFF) & 0x1F) != 0x05) {
shreeshas95 1:a0055b3280c8 370 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 371 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 372 return 1;
shreeshas95 1:a0055b3280c8 373 }
shreeshas95 1:a0055b3280c8 374
shreeshas95 1:a0055b3280c8 375 // wait for write to finish
shreeshas95 1:a0055b3280c8 376 while (spi.write(0xFF) == 0);
shreeshas95 1:a0055b3280c8 377
shreeshas95 1:a0055b3280c8 378 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 379 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 380 return 0;
shreeshas95 1:a0055b3280c8 381 }
shreeshas95 1:a0055b3280c8 382
shreeshas95 1:a0055b3280c8 383 int disk_read(uint8_t *buffer, uint64_t block_number)
shreeshas95 1:a0055b3280c8 384 {
shreeshas95 1:a0055b3280c8 385 // set read address for single block (CMD17)
shreeshas95 1:a0055b3280c8 386 if (cmd(17, block_number * cdv) != 0) {
shreeshas95 1:a0055b3280c8 387 return 1;
shreeshas95 1:a0055b3280c8 388 }
shreeshas95 1:a0055b3280c8 389
shreeshas95 1:a0055b3280c8 390 // receive the data
shreeshas95 1:a0055b3280c8 391 read(buffer, 512);
shreeshas95 1:a0055b3280c8 392 return 0;
shreeshas95 1:a0055b3280c8 393 }
shreeshas95 1:a0055b3280c8 394
shreeshas95 1:a0055b3280c8 395 int read(uint8_t *buffer, uint32_t length)
shreeshas95 1:a0055b3280c8 396 {
shreeshas95 1:a0055b3280c8 397 cs_SDCard = 0;
shreeshas95 1:a0055b3280c8 398
shreeshas95 1:a0055b3280c8 399 // read until start byte (0xFF)
shreeshas95 1:a0055b3280c8 400 while (spi.write(0xFF) != 0xFE);
shreeshas95 1:a0055b3280c8 401
shreeshas95 1:a0055b3280c8 402 // read data
shreeshas95 1:a0055b3280c8 403 for (int i = 0; i < length; i++) {
shreeshas95 1:a0055b3280c8 404 buffer[i] = spi.write(0xFF);
shreeshas95 1:a0055b3280c8 405 }
shreeshas95 1:a0055b3280c8 406 spi.write(0xFF); // checksum
shreeshas95 1:a0055b3280c8 407 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 408
shreeshas95 1:a0055b3280c8 409 cs_SDCard = 1;
shreeshas95 1:a0055b3280c8 410 spi.write(0xFF);
shreeshas95 1:a0055b3280c8 411 return 0;
shreeshas95 1:a0055b3280c8 412 }
shreeshas95 1:a0055b3280c8 413
shreeshas95 1:a0055b3280c8 414 int disk_erase(int startBlock, int totalBlocks)
shreeshas95 1:a0055b3280c8 415 {
shreeshas95 1:a0055b3280c8 416 if(cmd(32, startBlock * cdv) != 0) {
shreeshas95 1:a0055b3280c8 417 return 1;
shreeshas95 1:a0055b3280c8 418 }
shreeshas95 1:a0055b3280c8 419 if (cmd(33, (startBlock+totalBlocks-1) * cdv) != 0) {
shreeshas95 1:a0055b3280c8 420 return 1;
shreeshas95 1:a0055b3280c8 421 }
shreeshas95 1:a0055b3280c8 422 if (cmd(38,0) != 0) {
shreeshas95 1:a0055b3280c8 423 return 1;
shreeshas95 1:a0055b3280c8 424 }
shreeshas95 1:a0055b3280c8 425
shreeshas95 1:a0055b3280c8 426 return 0; //normal return
shreeshas95 1:a0055b3280c8 427 }