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things are working
Dependencies: FreescaleIAP mbed-rtos mbed
Fork of CDMS_DEC_2016_jan by
Diff: cdms_sd.cpp
- Revision:
- 0:bcbd76c86cde
- Child:
- 1:ad3b8a8032e2
diff -r 000000000000 -r bcbd76c86cde cdms_sd.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/cdms_sd.cpp Wed Dec 16 09:06:59 2015 +0000 @@ -0,0 +1,382 @@ +#include "cdms_sd.h" + +SPI spi_sd(PTE1, PTE3, PTE2); // MOSI,MISO, CLOCK microcontroller(in order) +DigitalOut cs_sd(PTE22); + +Serial sd1(USBTX,USBRX); + +int cdv; +uint64_t sd_sectors(); +uint64_t sectors; + +void FCTN_SD_MNGR() +{ + /*Size of block of SD card for 2GB = 512B, 4 , 8 GB SD card. We will prefer 8 GB. + SD allocation. Assuming 8GB + SCP: 600 MB -122880 + SFF-AT: 2 GB -4194304 + SFF-BT: 5 GB -10485760 + HK-ARCH:100 MB -204800 + LOG: 50MB -102400 + SD card management: 50MB - 102400*/ + +} +int initialise_card() +{ + // Set to 100kHz for initialisation, and clock card with cs_sd = 1 + spi_sd.frequency(100000); + cs_sd = 1; + for (int i = 0; i < 16; i++) { + spi_sd.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_sd idle state\r\n"); + return SDCARD_FAIL; + } + +// send CMD8 to determine whther it is ver 2.x + int r = cmd8(); + if (r == R1_IDLE_STATE) { + printf("\rEntering v2\r\n"); + return initialise_card_v2(); + + } else if (r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) { + printf("\rEntering v1\r\n"); + return initialise_card_v1(); + + } else { + debug("\rNot in idle state after sending CMD8 (not an SD card?)\r\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("\rv1 initialization successfull\r\n"); + cdv = 512; + debug_if(SD_DBG, "\n\rInit: SEDCARD_V1\n\r"); + + return SDCARD_V1; + } + } + + debug("\rTimeout waiting for v1.x card\r\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("\rv2 initialization successfull\r\n"); + cmd58(); + debug_if(SD_DBG, "\n\rInit: SDCARD_V2\n\r"); + cdv = 1; + + return SDCARD_V2; + } + } + + debug("\rTimeout waiting for v2.x card\r\n"); + return SDCARD_FAIL; +} + +int cmd(int cmd, int arg) +{ + cs_sd = 0; + + // send a command + spi_sd.write(0x40 | cmd); + spi_sd.write(arg >> 24); + spi_sd.write(arg >> 16); + spi_sd.write(arg >> 8); + spi_sd.write(arg >> 0); + spi_sd.write(0x95); + + // wait for the repsonse (response[7] == 0) + for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { + int response = spi_sd.write(0xFF); + if (!(response & 0x80)) { + cs_sd = 1; + spi_sd.write(0xFF); + return response; + } + } + cs_sd = 1; + spi_sd.write(0xFF); + return -1; // timeout +} + + +int cmd58() +{ + cs_sd = 0; + int arg = 0; + + // send a command + spi_sd.write(0x40 | 58); + spi_sd.write(arg >> 24); + spi_sd.write(arg >> 16); + spi_sd.write(arg >> 8); + spi_sd.write(arg >> 0); + spi_sd.write(0x95); + + // wait for the repsonse (response[7] == 0) + for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { + int response = spi_sd.write(0xFF); + if (!(response & 0x80)) { + int ocr = spi_sd.write(0xFF) << 24; + ocr |= spi_sd.write(0xFF) << 16; + ocr |= spi_sd.write(0xFF) << 8; + ocr |= spi_sd.write(0xFF) << 0; + cs_sd = 1; + spi_sd.write(0xFF); + return response; + } + } + cs_sd = 1; + spi_sd.write(0xFF); + return -1; // timeout +} + + +int cmd8() +{ + cs_sd = 0; + + // send a command + spi_sd.write(0x40 | 8); // CMD8 + spi_sd.write(0x00); // reserved + spi_sd.write(0x00); // reserved + spi_sd.write(0x01); // 3.3v + spi_sd.write(0xAA); // check pattern + spi_sd.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_sd.write(0xFF); + if (!(response[0] & 0x80)) { + for (int j = 1; j < 5; j++) { + response[i] = spi_sd.write(0xFF); + } + cs_sd = 1; + spi_sd.write(0xFF); + return response[0]; + } + } + cs_sd = 1; + spi_sd.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("\rDidn't get a response from the disk\n"); + return 0; + } + + uint8_t cs_sdd[16]; + if (read(cs_sdd, 16) != 0) { + debug("\rCouldn't read cs_sdd response from disk\n"); + return 0; + } + + // cs_sdd_structure : cs_sdd[127:126] + // c_size : cs_sdd[73:62] + // c_size_mult : cs_sdd[49:47] + // read_bl_len : cs_sdd[83:80] - the *maximum* read block length + + int cs_sdd_structure = ext_bits(cs_sdd, 127, 126); + + switch (cs_sdd_structure) { + case 0: + cdv = 512; + c_size = ext_bits(cs_sdd, 73, 62); + c_size_mult = ext_bits(cs_sdd, 49, 47); + read_bl_len = ext_bits(cs_sdd, 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(cs_sdd, 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("cs_sdD struct unsupported\r\n"); + return 0; + }; + return blocks; +} + +int cmdx(int cmd, int arg) +{ + cs_sd = 0; + + // send a command + spi_sd.write(0x40 | cmd); + spi_sd.write(arg >> 24); + spi_sd.write(arg >> 16); + spi_sd.write(arg >> 8); + spi_sd.write(arg >> 0); + spi_sd.write(0x95); + + // wait for the repsonse (response[7] == 0) + for (int i = 0; i < SD_COMMAND_TIMEOUT; i++) { + int response = spi_sd.write(0xFF); + if (!(response & 0x80)) { + return response; + } + } + cs_sd = 1; + spi_sd.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("\rSet 512-byte block timed out\r\n"); + return 1; + } else { + printf("\rDisk initialization successfull\r\n"); + } + + spi_sd.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_sd = 0; + + // indicate start of block + spi_sd.write(0xFE); + + // write the data + for (int i = 0; i < length; i++) { + spi_sd.write(buffer[i]); + } + + // write the checksum + spi_sd.write(0xFF); + spi_sd.write(0xFF); + + // check the response token + if ((spi_sd.write(0xFF) & 0x1F) != 0x05) { + cs_sd = 1; + spi_sd.write(0xFF); + return 1; + } + + // wait for write to finish + while (spi_sd.write(0xFF) == 0); + + cs_sd = 1; + spi_sd.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_sd = 0; + + // read until start byte (0xFF) + while (spi_sd.write(0xFF) != 0xFE); + + // read data + for (int i = 0; i < length; i++) { + buffer[i] = spi_sd.write(0xFF); + } + spi_sd.write(0xFF); // checksum + spi_sd.write(0xFF); + + cs_sd = 1; + spi_sd.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 +}