Diff: SDC_init.h

Revision:

71:9193fbdaa3e1

Parent:

58:5c59f28620bc

Child:

72:9eea047ebd0c

--- a/SDC_init.h	Fri Jan 15 12:02:12 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,427 +0,0 @@
-//Serial PC(USBTX, USBRX);
-//DigitalOut cs_SDCard(PTE22);
-DigitalOut cs_SDCard(PTB1);
-
-#define SD_COMMAND_TIMEOUT 5000
-
-#define SD_DBG             0
-
-#define R1_IDLE_STATE           (1 << 0)
-#define R1_ERASE_RESET          (1 << 1)
-#define R1_ILLEGAL_COMMAND      (1 << 2)
-#define R1_COM_CRC_ERROR        (1 << 3)
-#define R1_ERASE_SEQUENCE_ERROR (1 << 4)
-#define R1_ADDRESS_ERROR        (1 << 5)
-#define R1_PARAMETER_ERROR      (1 << 6)
-//SPI spi(PTA16, PTA17, PTA15); // mosi, miso, sclk
-
-
-int initialise_card();
-int initialise_card_v1();
-int initialise_card_v2();
-int disk_initialize();
-//int disk_write(const uint8_t *, uint64_t);
-
-int disk_erase(int,int);
-
-uint64_t sd_sectors();
-uint64_t sectors;
-
-int cmd(int, int);
-int cmd58();
-int cmdx(int, int);
-int cmd8();
-int read(uint8_t*, uint32_t );
-int write(const uint8_t*, uint32_t );
-static uint32_t ext_bits(unsigned char *, int , int );
-
-int cdv;
-
-#define SDCARD_FAIL 0
-#define SDCARD_V1   1
-#define SDCARD_V2   2
-#define SDCARD_V2HC 3
-
-int count_bro;
-int i;
-int random[1000];
-
-
-void initialisation_SDCard(){ 
-//*******************************
-
-//    cs_adf =1;
-    
-//**************************
-    
-//    start_block_num =10 ;           // Read from TC
-//    end_block_num =Science_TMframe::SDC_address ;            // Read from TC    
-//    printf("welcome\n");
-    initialise_card();
-    int result= initialise_card();
-//    printf("initialise card result=%d\n",result);
-    disk_initialize();
-}
-
-
-
-
-int initialise_card()
-{
-    // Set to 100kHz for initialisation, and clock card with cs_SDCard = 1
-    spi.frequency(100000);
-    cs_SDCard = 1;
-    for (int i = 0; i < 16; i++) {
-        spi.write(0xFF);
-    }
-
-    // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
-    if (cmd(0, 0) != R1_IDLE_STATE) {
-        debug("No disk, or could not put SD card in to SPI idle state\n");
-        return SDCARD_FAIL;
-    }
-
-// send CMD8 to determine whther it is ver 2.x
-    int r = cmd8();
-    if (r == R1_IDLE_STATE) {
-//        printf("Entering v2 bro\n");
-        return initialise_card_v2();
-
-    } else if (r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
-        printf("Entering v1 bro\n");
-        return initialise_card_v1();
-
-    } else {
-        debug("Not in idle state after sending CMD8 (not an SD card?)\n");
-        return SDCARD_FAIL;
-    }
-}
-
-int initialise_card_v1()
-{
-    for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
-        cmd(55, 0);
-        if (cmd(41, 0) == 0) {
- //           printf("Yuppie v1 successful\n");
-            cdv = 512;
-            debug_if(SD_DBG, "\n\rInit: SEDCARD_V1\n\r");
-
-            return SDCARD_V1;
-        }
-    }
-
-    debug("Timeout waiting for v1.x card\n");
-    return SDCARD_FAIL;
-}
-
-
-int initialise_card_v2()
-{
-    for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
-        wait_ms(50);
-        cmd58();
-        cmd(55, 0);
-        if (cmd(41, 0x40000000) == 0) {
-  //          printf("Yuppie,v2 successful\n");
-            cmd58();
-            debug_if(SD_DBG, "\n\rInit: SDCARD_V2\n\r");
-            cdv = 1;
-
-            return SDCARD_V2;
-        }
-    }
-
-    debug("Timeout waiting for v2.x card\n");
-    return SDCARD_FAIL;
-}
-
-int cmd(int cmd, int arg)
-{
-    cs_SDCard = 0;
-
-    // send a command
-    spi.write(0x40 | cmd);
-    spi.write(arg >> 24);
-    spi.write(arg >> 16);
-    spi.write(arg >> 8);
-    spi.write(arg >> 0);
-    spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
-        int response = spi.write(0xFF);
-        if (!(response & 0x80)) {
-            cs_SDCard = 1;
-            spi.write(0xFF);
-            return response;
-        }
-    }
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return -1; // timeout
-}
-
-
-int cmd58()
-{
-    cs_SDCard = 0;
-    int arg = 0;
-
-    // send a command
-    spi.write(0x40 | 58);
-    spi.write(arg >> 24);
-    spi.write(arg >> 16);
-    spi.write(arg >> 8);
-    spi.write(arg >> 0);
-    spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
-        int response = spi.write(0xFF);
-        if (!(response & 0x80)) {
-            int ocr = spi.write(0xFF) << 24;
-            ocr |= spi.write(0xFF) << 16;
-            ocr |= spi.write(0xFF) << 8;
-            ocr |= spi.write(0xFF) << 0;
-            cs_SDCard = 1;
-            spi.write(0xFF);
-            return response;
-        }
-    }
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return -1; // timeout
-}
-
-
-int cmd8()
-{
-    cs_SDCard = 0;
-
-    // send a command
-    spi.write(0x40 | 8); // CMD8
-    spi.write(0x00);     // reserved
-    spi.write(0x00);     // reserved
-    spi.write(0x01);     // 3.3v
-    spi.write(0xAA);     // check pattern
-    spi.write(0x87);     // crc
-
-    // wait for the repsonse (response[7] == 0)
-    for (int i = 0; i < SD_COMMAND_TIMEOUT * 1000; i++) {
-        char response[5];
-        response[0] = spi.write(0xFF);
-        if (!(response[0] & 0x80)) {
-            for (int j = 1; j < 5; j++) {
-                response[i] = spi.write(0xFF);
-            }
-            cs_SDCard = 1;
-            spi.write(0xFF);
-            return response[0];
-        }
-    }
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return -1; // timeout
-}
-
-uint64_t sd_sectors()
-{
-    uint32_t c_size, c_size_mult, read_bl_len;
-    uint32_t block_len, mult, blocknr, capacity;
-    uint32_t hc_c_size;
-    uint64_t blocks;
-
-    // CMD9, Response R2 (R1 byte + 16-byte block read)
-    if (cmdx(9, 0) != 0) {
-        debug("Didn't get a response from the disk\n");
-        return 0;
-    }
-
-    uint8_t csd[16];
-    if (read(csd, 16) != 0) {
-        debug("Couldn't read csd response from disk\n");
-        return 0;
-    }
-
-    // csd_structure : csd[127:126]
-    // c_size        : csd[73:62]
-    // c_size_mult   : csd[49:47]
-    // read_bl_len   : csd[83:80] - the *maximum* read block length
-
-    int csd_structure = ext_bits(csd, 127, 126);
-
-    switch (csd_structure) {
-        case 0:
-            cdv = 512;
-            c_size = ext_bits(csd, 73, 62);
-            c_size_mult = ext_bits(csd, 49, 47);
-            read_bl_len = ext_bits(csd, 83, 80);
-
-            block_len = 1 << read_bl_len;
-            mult = 1 << (c_size_mult + 2);
-            blocknr = (c_size + 1) * mult;
-            capacity = blocknr * block_len;
-            blocks = capacity / 512;
-            debug_if(SD_DBG, "\n\rSDCard\n\rc_size: %d \n\rcapacity: %ld \n\rsectors: %lld\n\r", c_size, capacity, blocks);
-            break;
-
-        case 1:
-            cdv = 1;
-            hc_c_size = ext_bits(csd, 63, 48);
-            blocks = (hc_c_size+1)*1024;
-            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);
-            break;
-
-        default:
-            debug("CSD struct unsupported\r\n");
-            return 0;
-    };
-    return blocks;
-}
-
-int cmdx(int cmd, int arg)
-{
-    cs_SDCard = 0;
-
-    // send a command
-    spi.write(0x40 | cmd);
-    spi.write(arg >> 24);
-    spi.write(arg >> 16);
-    spi.write(arg >> 8);
-    spi.write(arg >> 0);
-    spi.write(0x95);
-
-    // wait for the repsonse (response[7] == 0)
-    for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) {
-        int response = spi.write(0xFF);
-        if (!(response & 0x80)) {
-            return response;
-        }
-    }
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return -1; // timeout
-}
-
-static uint32_t ext_bits(unsigned char *data, int msb, int lsb)
-{
-    uint32_t bits = 0;
-    uint32_t size = 1 + msb - lsb;
-    for (int i = 0; i < size; i++) {
-        uint32_t position = lsb + i;
-        uint32_t byte = 15 - (position >> 3);
-        uint32_t bit = position & 0x7;
-        uint32_t value = (data[byte] >> bit) & 1;
-        bits |= value << i;
-    }
-    return bits;
-}
-
-int disk_initialize()
-{
-    int i = initialise_card();
-    debug_if(SD_DBG, "init card = %d\n", i);
-    sectors = sd_sectors();
-
-    // Set block length to 512 (CMD16)
-    if (cmd(16, 512) != 0) {
-        debug("Set 512-byte block timed out\n");
-        return 1;
-    } else {
- //       printf("Hey,block init succesful\n");
-    }
-
-    spi.frequency(1000000); // Set to 1MHz for data transfer
-    return 0;
-}
-
-int disk_write(const uint8_t *buffer, uint64_t block_number)
-
-{
-    // set write address for single block (CMD24)
-    if (cmd(24, block_number * cdv) != 0) {
-        return 1;
-    }
-
-    // send the data block
-    write(buffer, 512);
-    //printf("Written Successfully bro \n");
-    return 0;
-}
-
-int write(const uint8_t*buffer, uint32_t length)
-{
-    cs_SDCard = 0;
-
-    // indicate start of block
-    spi.write(0xFE);
-
-    // write the data
-    for (int i = 0; i < length; i++) {
-        spi.write(buffer[i]);
-    }
-
-    // write the checksum
-    spi.write(0xFF);
-    spi.write(0xFF);
-
-    // check the response token
-    if ((spi.write(0xFF) & 0x1F) != 0x05) {
-        cs_SDCard = 1;
-        spi.write(0xFF);
-        return 1;
-    }
-
-    // wait for write to finish
-    while (spi.write(0xFF) == 0);
-
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return 0;
-}
-
-int disk_read(uint8_t *buffer, uint64_t block_number)
-{
-    // set read address for single block (CMD17)
-    if (cmd(17, block_number * cdv) != 0) {
-        return 1;
-    }
-
-    // receive the data
-    read(buffer, 512);
-    return 0;
-}
-
-int read(uint8_t *buffer, uint32_t length)
-{
-    cs_SDCard = 0;
-
-    // read until start byte (0xFF)
-    while (spi.write(0xFF) != 0xFE);
-
-    // read data
-    for (int i = 0; i < length; i++) {
-        buffer[i] = spi.write(0xFF);
-    }
-    spi.write(0xFF); // checksum
-    spi.write(0xFF);
-
-    cs_SDCard = 1;
-    spi.write(0xFF);
-    return 0;
-}
-
-int disk_erase(int startBlock, int totalBlocks)
-{
-    if(cmd(32, startBlock * cdv) != 0) {
-        return 1;
-    }
-    if (cmd(33, (startBlock+totalBlocks-1) * cdv) != 0) {
-        return 1;
-    }
-    if (cmd(38,0) != 0) {
-        return 1;
-    }
-    
-    return 0; //normal return
-}
\ No newline at end of file