| 1,254 → 1,688 |
|---|
| #include <avr/io.h> |
| #include <util/delay.h> |
| #include "fat16.h" |
| #include <string.h> |
| #include "sdc.h" |
| #include "ssc.h" |
| #include "timer0.h" |
| #include "printf_P.h" |
| #include "crc16.h" |
| |
| #define _SD_DEBUG |
| |
| #define CMD_GO_IDLE_STATE 0x00 /* CMD00: response R1 */ |
| #define CMD_SEND_OP_COND 0x01 /* CMD01: response R1 */ |
| #define CMD_SEND_IF_COND 0x08 /* CMD08: response R7 */ |
| #define CMD_SEND_CSD 0x09 /* CMD09: response R1 */ |
| #define CMD_SEND_CID 0x0A /* CMD10: response R1 */ |
| #define CMD_SEND_STATUS 0x0D /* CMD13: response R2 */ |
| #define CMD_SET_BLOCKLEN 0x10 /* CMD16: arg0[31:0]: block length, response R1*/ |
| #define CMD_READ_SINGLE_BLOCK 0x11 /* CMD17: arg0[31:0]: data address, response R1 */ |
| #define CMD_WRITE_SINGLE_BLOCK 0x18 /* CMD24: arg0[31:0]: data address, response R1 */ |
| #define CMD_APP_CMD 0x37 /* CMD55: response R1 */ |
| #define CMD_READ_OCR 0x3A /* CMD58: response R3 */ |
| #define CMD_CRC_ON_OFF 0x3B /* CMD59: arg0[31:1]: stuff bits, arg0[0:0]: crc option, response R1 */ |
| #define ACMD_SEND_OP_COND 0x29 /* ACMD41: arg0[31]: stuff bits, arg0[30]: HCS, arg0[29:0] stuff bits*, response R1 */ |
| |
| #define R1_NO_ERR 0x00 |
| #define R1_IDLE_STATE 0x01 |
| #define R1_ERASE_RESET 0x02 |
| #define R1_ILLEGAL_CMD 0x04 |
| #define R1_COM_CRC_ERR 0x08 |
| #define R1_ERASE_SEQUENCE_ERR 0x10 |
| #define R1_ADDRESS_ERR 0x20 |
| #define R1_PARAMETER_ERR 0x40 |
| #define R1_BAD_RESPONSE 0x80 |
| |
| #define R2_NO_ERR 0x00 |
| #define R2_CARD_LOCKED 0x01 |
| #define R2_ERASE_WRITE_PROT_ERR 0x02 |
| #define R2_UNKOWN_ERR 0x04 |
| #define R2_CARD_CTRL_ERR 0x08 |
| #define R2_CARD_ECC_ERR 0x10 |
| #define R2_WRITE_PROT_ERR 0x20 |
| #define R2_ERASE_PARAM_ERR 0x40 |
| #define R2_OUT_OF_RANGE_ERR 0x80 |
| |
| #define DATA_START_TOKEN 0xFE |
| #define DATA_RESPONSE_MASK 0x1F |
| #define DATA_RESPONSE_OK 0x05 |
| #define DATA_RESPONSE_CRC_ERR 0x0B |
| #define DATA_RESPONSE_WRITE_ERR 0x1D |
| |
| typedef enum |
| { |
| VER_UNKNOWN, |
| VER_1X, |
| VER_20 |
| } SDVersion_t; |
| |
| typedef struct |
| { |
| uint8_t Valid; |
| SDVersion_t Version; // HW-Version |
| uint32_t Capacity; // Memory capacity in bytes |
| uint8_t CID[16]; // CID register |
| uint8_t CSD[16]; // CSD register |
| } __attribute__((packed)) SDCardInfo_t; |
| |
| |
| volatile SDCardInfo_t SDCardInfo; |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Module name: mmc.c |
| // Compiler used: avr-gcc 3.4.5 |
| // Last Modifikation: 24.07.2007 |
| // Version: 1.05 |
| // Authors: Stephan Busker |
| // Description: Source files for connecting to an sdcard using the SSC |
| // Function: CRC7(uint8_t* cmd, uint32_t len); |
| // |
| //........................................................................................................................................ |
| // Functions: u8 SDC_init(void); |
| // u8 SDC_PutCommand (u8*CMD); |
| // u8 SDC_PutSector(u32 addr,u8*Buffer); |
| // u8 SDC_GetSector(u32 addr,u8*Buffer); |
| // void SDC_GetBlock(u8*CMD,u8*Buffer,u16 Bytes); |
| // Description: This function calculated the CRC7 checksum used in the last byte of a spi command frame. |
| // |
| ////........................................................................................................................................ |
| // ext. functions: extern void SSC_Init(void); |
| // extern u8 SSC_GetChar (void); |
| // extern void SSC_PutChar (u8); |
| // extern void SSC_Enable(void); |
| // extern void SSC_Disable(void); |
| //........................................................................................................................................ |
| // |
| // URL: www.Mikro-Control.de |
| // mailto: stephan.busker@mikro-control.de |
| // Returnvalue: the function returns the crc7 including bit 0 set to 1 |
| //________________________________________________________________________________________________________________________________________ |
| |
| uint8_t CRC7(uint8_t *cmd, uint32_t len) |
| { |
| uint8_t i, a; |
| uint8_t crc, Data; |
| |
| crc = 0; // init CRC buffer |
| for (a = 0; a < len ;a++) // for every byte in the msg |
| { |
| Data = cmd[a]; |
| for (i=0;i<8;i++) // for every bit in the byte |
| { |
| crc <<= 1; // shift crc |
| if ((Data & 0x80)^(crc & 0x80)) crc ^=0x09; //xor |
| Data <<= 1; // shift data for next bit |
| } |
| } |
| crc = (crc<<1)|1; // set terminating bit to 1 |
| return(crc); |
| } |
| |
| |
| uint8_t SDC_WaitForBusy(uint16_t timeout) |
| { |
| uint8_t rsp = 0; |
| uint16_t timestamp = 0; |
| |
| SSC_Enable(); // enable chipselect. |
| timestamp = SetDelay(timeout); |
| do |
| { |
| rsp = SSC_GetChar(); |
| if(CheckDelay(timestamp)) break; |
| }while(rsp != 0xFF); // wait while card is busy (data out low) |
| return(rsp); |
| } |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SDC_Init(void); |
| // |
| // Description: This function initialises the SDCard to spi-mode. |
| // |
| // Function: SDC_SendCMDR1(uint8_t CmdNo, uint32_t arg); |
| // |
| // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
| // Description: This function send a command frame to the SD-Card in spi-mode. |
| // |
| // |
| // Returnvalue: The function returns the first response byte like for R1 commands |
| //________________________________________________________________________________________________________________________________________ |
| |
| u8 SDC_Init(void) |
| uint8_t SDC_SendCMDR1(uint8_t CmdNo, uint32_t arg) |
| { |
| u8 Timeout = 0; |
| u8 CMD[] = {0x40,0x00,0x00,0x00,0x00,0x95}; |
| u16 a = 0; |
| u8 b = 0; |
| uint8_t r1; |
| uint16_t timeout = 0; |
| uint16_t a; |
| uint8_t cmd[6]; |
| |
| SSC_Init(); // Initialise SSC to transmit data to the sdcard. |
| cmd[0] = 0x40|CmdNo; // set command index |
| cmd[1] = (arg & 0xFF000000)>>24; |
| cmd[2] = (arg & 0x00FF0000)>>16; |
| cmd[3] = (arg & 0x0000FF00)>>8; |
| cmd[4] = (arg & 0x000000FF); |
| cmd[5] = CRC7(cmd, 5); // update checksum |
| #ifdef _SD_DEBUG |
| printf("\r\nCmd=%02X, arg=%04X%04X", CmdNo, (uint16_t)(arg>>16), (uint16_t)(0xFFFF & arg)); |
| #endif |
| SSC_Disable(); // disable chipselect. |
| SSC_PutChar(0xFF); // dummy to sync |
| SSC_Enable(); // enable chipselect. |
| _delay_loop_2(200); |
| //SDC_WaitForBusy(500); // wait 500ms until card is busy |
| |
| for (a = 0;a < 6; a++) // send the command sequence to the sdcard (6 bytes) |
| { |
| SSC_PutChar(cmd[a]); |
| _delay_loop_2(10); |
| } |
| // get response byte |
| do |
| { |
| r1 = SSC_GetChar(); // get byte from sd-card |
| if (timeout++ > 1000) break; |
| }while(r1 == 0xFF); // wait for the response byte from sd-card. |
| #ifdef _SD_DEBUG |
| printf("-->R1=%02X", r1); |
| #endif |
| return(r1); |
| } |
| |
| _delay_ms(10); // before initialising the sdcard wait for 10ms |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_SendACMDR1(uint8_t CmdNo, uint32_t arg); |
| // |
| // Description: This function send a application command frame to the SD-Card in spi-mode. |
| // |
| // |
| // Returnvalue: The function returns the first response byte like for R1 commands |
| //________________________________________________________________________________________________________________________________________ |
| uint8_t SDC_SendACMDR1(uint8_t CmdNo, uint32_t arg) |
| { |
| uint8_t r1 = 0xFF; |
| r1 = SDC_SendCMDR1(CMD_APP_CMD, 0UL); |
| if(r1 & R1_BAD_RESPONSE) return(r1); |
| r1 = SDC_SendCMDR1(CmdNo, arg); |
| return(r1); |
| } |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_GetData(uint8_t * cmd ,u8 *Buffer, u32 len); |
| // |
| // Description: This function sneds cmd an reads a datablock of len from the sd-card |
| // |
| // |
| // Returnvalue: SD_Result_t |
| //________________________________________________________________________________________________________________________________________ |
| |
| for (b=0;b<0x0f;b++) // sending 74Clocks brings the sdcard into spimode. |
| SD_Result_t SDC_GetData(uint8_t CmdNo, uint32_t addr, uint8_t *Buffer, uint32_t len) |
| { |
| uint8_t rsp; |
| uint16_t a, crc16; |
| SD_Result_t result = SD_ERROR_UNKNOWN; |
| |
| // send the command |
| rsp = SDC_SendCMDR1(CmdNo, addr); |
| if (rsp != R1_NO_ERR) |
| { |
| _delay_us(1); // wait at least 1us between the characters. |
| SSC_PutChar(0xff); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| |
| |
| while(SDC_PutCommand (CMD) !=1) // Sending CMD0 (Reset) to the sdcard. |
| |
| do |
| { |
| if (Timeout++ > 200) |
| { |
| return(1); |
| rsp = SSC_GetChar(); |
| if((rsp & 0xF0) == 0x00) // data error token |
| { |
| result = SD_ERROR_READ_DATA; |
| goto end; |
| } |
| }while(rsp != DATA_START_TOKEN); |
| // data start token received |
| for (a = 0; a < len; a++) // read the block from the SSC |
| { |
| Buffer[a] = SSC_GetChar(); |
| } |
| |
| Timeout = 0; |
| CMD[0] = 0x41; |
| CMD[5] = 0xFF; |
| while( SDC_PutCommand (CMD) !=0) // Sending CMD1 to the sdcard. |
| // Read two bytes CRC16-Data checksum |
| crc16 = SSC_GetChar(); // highbyte first |
| crc16 = (crc16<<8)|SSC_GetChar(); // lowbyte last |
| /* if(crc16 != CRC16(Buffer, len)) result = SD_ERROR_CRC_DATA; |
| else */result = SD_SUCCESS; |
| |
| end: |
| if(result != SD_SUCCESS) |
| { |
| if (Timeout++ > 100) |
| { |
| return(2); |
| } |
| printf("Error %02X reading data from sd card (R1=%02X).\r\n", result, rsp); |
| } |
| return(result); |
| } |
| |
| SSC_Disable(); // disable sdcard. |
| return(0); |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_PrintCID(u8 * pCID); |
| // |
| // Description: This function prints the CIS register in a human readable format. |
| // |
| // |
| // Returnvalue: the function returns nothing |
| //________________________________________________________________________________________________________________________________________ |
| |
| void SDC_PrintCID(uint8_t * pCID) |
| { |
| uint8_t pn[6]; |
| uint16_t temp1, temp2; |
| |
| printf("\r\n Manufacturer ID: %i\r\n", pCID[0]); |
| memcpy(pn, &pCID[1], 2); |
| pn[2] = '\0'; // terminate string |
| printf(" Application ID: %s\r\n",pn); |
| memcpy(pn, &pCID[3], 5); |
| pn[5] = '\0'; // terminate string |
| printf(" Product Name: %s\r\n",pn); |
| printf(" Product Rev.: %i.%i\r\n",pCID[8]>>4, pCID[8]&0xF); |
| printf(" Serial No.: "); |
| for(temp1 = 0; temp1<4; temp1++) |
| { |
| printf("%02X", pCID[9+temp1]); |
| } |
| printf("\r\n"); |
| temp1 = pCID[14] & 0x0F; // month |
| temp2 = ((pCID[14]>>4)|(pCID[13]<<4)) + 2000; // year |
| printf(" Manufac. Date: %i/%i\r\n\r\n",temp1, temp2); |
| } |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_GetCID(uint8_t * pCID); |
| // |
| // Description: This function reads the CIS register form the sd card in spi mode. |
| // |
| // |
| // Returnvalue: the function returns error state |
| //________________________________________________________________________________________________________________________________________ |
| |
| SD_Result_t SDC_GetCID(uint8_t * pCID) |
| { |
| return SDC_GetData(CMD_SEND_CID, 0UL, pCID, 16); |
| } |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_GetCSD(uint8_t * pCSD); |
| // |
| // Description: This function reads the CSD register form the sd card in spi mode. |
| // |
| // |
| // Returnvalue: the function returns error state |
| //________________________________________________________________________________________________________________________________________ |
| |
| SD_Result_t SDC_GetCSD(uint8_t * pCSD) |
| { |
| return SDC_GetData(CMD_SEND_CSD, 0UL, pCSD, 16); |
| } |
| |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SDC_PutCommand(* CMD); |
| // |
| // Description: This function initialises the SDCard to spi-mode. |
| // |
| // Function: SDC_Init(void); |
| // |
| // Description: This function initialises the SDCard to spi-mode. |
| // |
| // |
| // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
| //________________________________________________________________________________________________________________________________________ |
| |
| u8 SDC_PutCommand (u8*CMD) |
| SD_Result_t SDC_Init(void) |
| { |
| u8 tmp = 0xff; |
| u8 Timeout = 0; |
| u16 a = 0; |
| uint16_t timeout = 0; |
| uint8_t rsp[6]; // SD-SPI response buffer |
| SD_Result_t result = SD_ERROR_UNKNOWN; |
| |
| if(SD_SWITCH) // init only if the SD-Switch is indicating a card in the slot |
| { |
| printf("\r\n SSC init..."); |
| SSC_Init(); |
| printf("ok"); |
| |
| #ifdef SSC_RX_FIFO |
| SSC_ClearRxFifo(); |
| #endif |
| SSC_Disable(); // disable chipselect |
| SSC_PutChar(0xFF); // Send 8 Clocks to the sdcard while card is not selected. |
| SSC_Enable(); // enable chipselect. |
| _delay_loop_2(1050); |
| |
| if (*CMD == 0x41) _delay_ms(10); // if command is CMD0 generate a short delay. |
| |
| for (a = 0;a<0x06;a++) // send the command sequence to the sdcard (6 bytes) |
| { |
| SSC_PutChar(*CMD++); |
| } |
| printf("\r\n SDC init..."); |
| SDCardInfo.Valid = 0; |
| /* The host shall supply power to the card so that the voltage is reached to Vdd_min within 250ms and |
| start to supply at least 74 SD clocks to the SD card with keeping cmd line to high. In case of SPI |
| mode, CS shall be held to high during 74 clock cycles. */ |
| SSC_Disable(); // set SD_CS high |
| for (timeout = 0; timeout < 15; timeout++) // 15*8 = 120 cycles |
| { |
| SSC_PutChar(0xFF); |
| } |
| |
| #ifdef SSC_RX_FIFO |
| SSC_ClearRxFifo(); |
| #endif |
| while (tmp == 0xff) // Wait for response from sdcard. |
| { |
| tmp = SSC_GetChar(); |
| if (Timeout++ > 100) |
| // switch to idle state |
| #ifdef _SD_DEBUG |
| printf("\r\nGoing idle state.."); |
| #endif |
| timeout = 0; |
| do |
| { |
| break; // or timeout. |
| rsp[0] = SDC_SendCMDR1(CMD_GO_IDLE_STATE, 0UL); |
| if (timeout++ > 500) |
| { |
| printf("reset timeout"); |
| result = SD_ERROR_RESET; |
| goto end; |
| } |
| }while(rsp[0] != R1_IDLE_STATE); |
| // enable crc feature |
| /* if(SDC_SendCMDR1(CMD_CRC_ON_OFF, 1UL) != R1_IDLE_STATE) |
| { |
| printf("Bad cmd59 R1=%02X.", rsp[0]); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| }*/ |
| // check for card hw version |
| // 2.7-3.6V Range = 0x01, check pattern 0xAA |
| rsp[0] = SDC_SendCMDR1(CMD_SEND_IF_COND, 0x000001AA); |
| // answer to cmd58 is an R7 response (R1+ 4Byte IFCond) |
| if(rsp[0] & R1_BAD_RESPONSE) |
| { |
| printf("Bad cmd8 R1=%02X.", rsp[0]); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| } |
| if(rsp[0] & R1_ILLEGAL_CMD) |
| { |
| //Ver1.X SD Memory Card or not a SD Memory Card |
| SDCardInfo.Version = VER_1X; |
| } |
| else |
| { |
| // Ver2.00 or later SD Memory Card |
| // reading the remaining bytes of the R7 response |
| SDCardInfo.Version = VER_20; |
| for(timeout = 1; timeout < 5; timeout++) |
| { |
| rsp[timeout] = SSC_GetChar(); |
| } |
| //check pattern |
| if(rsp[4]!= 0xAA) |
| { |
| printf("Bad cmd8 R7 check pattern.\r\n"); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| if ( (rsp[3] & 0x0F)!= 0x01 ) // voltage range is not 2.7-3.6V |
| { |
| |
| return(tmp); |
| } |
| printf("Card is incompatible to 3.3V.\r\n"); |
| result = SD_ERROR_BAD_VOLTAGE_RANGE; |
| goto end; |
| } |
| } |
| |
| rsp[0] = SDC_SendCMDR1(CMD_READ_OCR, 0UL); |
| // answer to cmd58 is an R3 response (R1 + 4Byte OCR) |
| if(rsp[0] & R1_BAD_RESPONSE) |
| { |
| printf("Bad cmd58 R1 %02x.", rsp[0]); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| if(rsp[0] & R1_ILLEGAL_CMD) |
| { |
| printf("Not an SD-CARD."); |
| result = SD_ERROR_NO_SDCARD; |
| goto end; |
| } |
| // read 4 bytes of OCR register |
| for(timeout = 1; timeout < 5; timeout++) |
| { |
| rsp[timeout] = SSC_GetChar(); |
| } |
| // FollowMe & SD-Logger uses 3.3 V, therefore check for bit 20 & 21 |
| if((rsp[2] & 0x30) != 0x30) |
| { |
| // supply voltage is not supported by sd-card |
| printf("Card is incompatible to 3.3V."); |
| result = SD_ERROR_BAD_VOLTAGE_RANGE; |
| goto end; |
| } |
| |
| // Initialize the sd-card sending continously ACMD_SEND_OP_COND (only supported by SD cards) |
| timeout = SetDelay(2000); // set timeout to 2000 ms (large cards tend to longer) |
| do |
| { |
| rsp[0] = SDC_SendACMDR1(ACMD_SEND_OP_COND, 0UL); |
| if(rsp[0] & R1_BAD_RESPONSE) |
| { |
| printf("Bad Acmd41 R1=%02X.", rsp[0]); |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| if(CheckDelay(timeout)) |
| { |
| printf("Init timeout."); |
| result = SD_ERROR_INITIALIZE; |
| goto end; |
| } |
| } while(rsp[0] & R1_IDLE_STATE); // loop until idle state |
| |
| if(rsp[0] != R1_NO_ERR) |
| { |
| printf("Init error."); |
| result = SD_ERROR_INITIALIZE; |
| goto end; |
| } |
| /* set block size to 512 bytes */ |
| if(SDC_SendCMDR1(CMD_SET_BLOCKLEN, 512UL) != R1_NO_ERR) |
| { |
| printf("Error setting block length to 512."); |
| result = SD_ERROR_SET_BLOCKLEN; |
| goto end; |
| } |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SDC_PutSector(void); |
| // |
| // Description: This function writes one sector of data to the SSC |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| //SSC_Disable(); // set SD_CS high |
| // here is the right place to inrease the SPI baud rate to maximum |
| //SSC_Enable(); // set SD_CS high |
| |
| u8 SDC_PutSector(u32 addr,u8*Buffer) |
| { |
| u8 tmp; |
| u8 CMD[] = {0x58,0x00,0x00,0x00,0x00,0xFF}; |
| |
| addr = addr << 9; // convert sectoradress to byteadress |
| |
| CMD[1] = ((addr & 0xFF000000) >>24 ); |
| CMD[2] = ((addr & 0x00FF0000) >>16 ); |
| CMD[3] = ((addr & 0x0000FF00) >>8 ); |
| // read CID register |
| result = SDC_GetCID((uint8_t *)&SDCardInfo.CID); |
| if(result != SD_SUCCESS) |
| { |
| printf("Error reading CID.\r\n"); |
| goto end; |
| } |
| |
| tmp = SDC_PutCommand (CMD); // send command to sdcard. |
| if (tmp != 0) |
| { |
| return(tmp); |
| // read CSD register |
| result = SDC_GetCSD((uint8_t *)&SDCardInfo.CSD); |
| if(result != SD_SUCCESS) |
| { |
| printf("Error reading CSD."); |
| goto end; |
| } |
| |
| printf("ok\r\n"); |
| |
| uint8_t c_size_mult, read_bl_len; |
| uint32_t c_size; |
| |
| switch(SDCardInfo.CSD[0]>>6) // check CSD Version |
| { |
| case 0x00: // if CSD is V1.0 structure (2GB limit) |
| |
| /* |
| memory capacity = BLOCKNR * BLOCK_LEN |
| BLOCKNR = (C_SIZE+1) * MULT |
| MULT = 2^(C_SIZE_MULT+2) |
| BLOCK_LEN = 2^READ_BL_LEN |
| |
| C_SIZE is 12 bits [73:62] in CSD register |
| C_SIZE_MULT is 3 bits [49:47] in CSD register |
| READ_BL_LEN is 4 bits [83:80] in CSD register |
| */ |
| |
| read_bl_len = (SDCardInfo.CSD[5] & 0x0F); //CSD[05] -> [87:80] |
| c_size = ((uint32_t)(SDCardInfo.CSD[6] & 0x03))<<10; //CSD[06] -> [79:72] |
| c_size |= ((uint32_t)SDCardInfo.CSD[7])<<2; //CSD[07] -> [71:64] |
| c_size |= (uint32_t)(SDCardInfo.CSD[8]>>6); //CSD[08] -> [63:56] |
| c_size_mult = (SDCardInfo.CSD[9] & 0x03)<<1; //CSD[09] -> [55:48] |
| c_size_mult |=(SDCardInfo.CSD[10] & 0x80)>>7; //CSD[10] -> [47:40] |
| SDCardInfo.Capacity = (uint32_t)(c_size+1)*(1L<<(c_size_mult+2))*(1L<<read_bl_len); |
| break; |
| |
| case 0x01: // if CSD is V2.0 structure (HC SD-Card > 2GB) |
| |
| /* |
| memory capacity = (C_SIZE+1) * 512K byte |
| C_SIZE is 22 bits [69:48] in CSR register |
| */ |
| |
| c_size = ((uint32_t)(SDCardInfo.CSD[7] & 0x3F))<<16; //CSD[07] -> [71:64] |
| c_size |= ((uint32_t)SDCardInfo.CSD[8])<<8; //CSD[08] -> [63:56] |
| c_size |= (uint32_t)SDCardInfo.CSD[9]; //CSD[09] -> [55:48]; |
| SDCardInfo.Capacity = (c_size + 1)* 512L * 1024L; |
| break; |
| |
| default: //unknown CSD Version |
| SDCardInfo.Capacity = 0; |
| break; |
| } |
| |
| switch(SDCardInfo.Version) |
| { |
| case VER_1X: |
| printf(" SD-CARD V1.x"); |
| break; |
| case VER_20: |
| printf(" SD-CARD V2.0 or later"); |
| default: |
| break; |
| } |
| uint16_t mb_size = (uint16_t)(SDCardInfo.Capacity/(1024L*1024L)); |
| printf("\r\n Capacity = %i MB", mb_size); |
| |
| SDC_PrintCID((uint8_t *)&SDCardInfo.CID); |
| SDCardInfo.Valid = 1; |
| // jump point for error condition before |
| end: |
| SSC_Disable(); |
| } |
| |
| #ifdef SSC_RX_FIFO |
| SSC_ClearRxFifo(); |
| #endif |
| for (u8 a=0;a<100;a++) // wait until sdcard is ready |
| else |
| { |
| SSC_GetChar(); |
| SSC_Deinit(); |
| SDCardInfo.Valid = 0; |
| result = SD_ERROR_NOCARD; |
| printf("No Card in Slot."); |
| } |
| |
| SSC_PutChar(0xFE); // send start of header to the SSC |
| |
| for (u16 a=0;a<512;a++) // transmitt one sector (normaly 512bytes) of data to the sdcard. |
| { |
| SSC_PutChar(*Buffer++); |
| } |
| |
| SSC_PutChar(0xFF); // write two bytes of crc to the sdcard (not used in spi-mode) |
| SSC_PutChar(0xFF); |
| #ifdef SSC_RX_FIFO |
| SSC_ClearRxFifo(); |
| #endif |
| |
| while (SSC_GetChar() != 0xff){}; // wait untile the sdcard is ready. |
| |
| SSC_Disable(); // disable sdcard. |
| |
| return(0); |
| return(result); |
| } |
| |
| |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SDC_GetSector(u32 addr,u8*Buffer); |
| // |
| // Description: This function reads one sector of data from the SSC |
| // |
| // Function: SDC_Deinit(void); |
| // |
| // Returnvalue: none |
| // Description: This function deinitialises the SDCard interface. |
| // |
| // |
| // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
| //________________________________________________________________________________________________________________________________________ |
| |
| u8 SDC_GetSector(u32 addr,u8*Buffer) |
| { |
| u8 CMD[] = {0x51,0x00,0x00,0x00,0x00,0xFF}; |
| |
| addr = addr << 9; // convert sectoradress to byteadress. |
| SD_Result_t SDC_Deinit(void) |
| { |
| printf("\r\n SDC deinit..."); |
| SSC_Deinit(); |
| |
| CMD[1] = ((addr & 0xFF000000) >>24 ); |
| CMD[2] = ((addr & 0x00FF0000) >>16 ); |
| CMD[3] = ((addr & 0x0000FF00) >>8 ); |
| SDCardInfo.Valid = 0; |
| SDCardInfo.Capacity = 0; |
| SDCardInfo.Version = VER_UNKNOWN; |
| |
| SDC_GetBlock(CMD,Buffer,512); // read specified sector from sdcard. |
| |
| return(0); |
| printf("ok"); |
| return(SD_SUCCESS); |
| } |
| |
| |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SDC_GetBlock(void); |
| // |
| // Description: This function reads one block of data of s16 bytes from the SSC. |
| // |
| // Function: SDC_PutSector(uint32_t addr, const uint8_t *Buffer) |
| // |
| // Returnvalue: the function returns 0 if the initialisation was successfull otherwise the function returns an errorcode. |
| // Description: This function writes one sector of data to the SSC |
| // |
| // |
| // Returnvalue: SD_Result_t |
| //________________________________________________________________________________________________________________________________________ |
| |
| void SDC_GetBlock(u8*CMD,u8*Buffer,u16 Bytes) |
| { |
| if (SDC_PutCommand (CMD) != 0) // Send command to the sdcard. |
| SD_Result_t SDC_PutSector(uint32_t addr, const uint8_t *Buffer) |
| { |
| uint8_t rsp; |
| uint16_t a, crc16; |
| uint16_t timeout = 0; |
| SD_Result_t result = SD_ERROR_UNKNOWN; |
| |
| addr = addr << 9; // convert sectoradress to byteadress |
| rsp = SDC_SendCMDR1(CMD_WRITE_SINGLE_BLOCK, addr); |
| if (rsp != R1_NO_ERR) |
| { |
| return; |
| result = SD_ERROR_BAD_RESPONSE; |
| goto end; |
| } |
| |
| #ifdef SSC_RX_FIFO |
| SSC_ClearRxFifo(); |
| #endif |
| while (SSC_GetChar() != 0xfe){}; // wait until the sdcard is ready to transmitt data. |
| |
| for (u16 a=0;a<Bytes;a++) // read the block from the SSC (normaly 512Bytes) |
| |
| for (a=0;a<20;a++) // at least one byte |
| { |
| *Buffer++ = SSC_GetChar(); |
| SSC_GetChar(); |
| } |
| |
| SSC_GetChar(); // Read two bytes CRC- checksum (not used in spi-mode) |
| SSC_GetChar(); |
| SSC_Disable(); // disable sdcard. |
| crc16 = CRC16(Buffer, 512); // calc checksum for data block |
| SSC_PutChar(DATA_START_TOKEN); // send data start of header to the SSC |
| |
| for (a=0;a<512;a++) // transmit one sector (normaly 512bytes) of data to the sdcard. |
| { |
| SSC_PutChar(Buffer[a]); |
| } |
| // write two bytes of crc16 to the sdcard |
| SSC_PutChar((uint8_t)(crc16>>8)); // write high byte first |
| SSC_PutChar((uint8_t)(0x00FF&crc16)); // lowbyte last |
| |
| do // wait for data response token |
| { |
| rsp = SSC_GetChar(); |
| if(timeout++ > 500) |
| { |
| result = SD_ERROR_TIMEOUT; |
| goto end; |
| } |
| }while((rsp & 0x11) != 0x01 ); |
| // analyse data response token |
| switch(rsp & DATA_RESPONSE_MASK) |
| { |
| case DATA_RESPONSE_OK: |
| result = SD_SUCCESS; |
| break; |
| case DATA_RESPONSE_CRC_ERR: |
| result = SD_ERROR_CRC_DATA; |
| goto end; |
| break; |
| case DATA_RESPONSE_WRITE_ERR: |
| result = SD_ERROR_WRITE_DATA; |
| goto end; |
| break; |
| default: |
| result = SD_ERROR_UNKNOWN; |
| goto end; |
| break; |
| |
| } |
| // wait 2 seconds until the sdcard is busy. |
| rsp = SDC_WaitForBusy(2000); |
| if(rsp != 0xFF) |
| { |
| result = SD_ERROR_TIMEOUT; |
| goto end; |
| } |
| |
| // check card status |
| rsp = SDC_SendCMDR1(CMD_SEND_STATUS, 0); |
| // first byte of R2 response is like R1 response |
| if(rsp != R1_NO_ERR) |
| { |
| result = SD_ERROR_BAD_RESPONSE; |
| SSC_GetChar(); // read out 2nd byte |
| goto end; |
| } |
| // 2nd byte of r2 response |
| rsp = SSC_GetChar(); |
| if(rsp != R2_NO_ERR) |
| { |
| result = SD_ERROR_WRITE_DATA; |
| SSC_GetChar(); |
| goto end; |
| } |
| end: |
| if(result != SD_SUCCESS) |
| { |
| printf("Error %02X writing data to sd card (R=%02X).\r\n", result, rsp); |
| } |
| return(result); |
| } |
| |
| |
| |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Function: SDC_GetSector(uint32_t addr,uint8_t *Buffer); |
| // |
| // Description: This function reads one sector of data from the SSC |
| // |
| // |
| // Returnvalue: SD_Result_t |
| //________________________________________________________________________________________________________________________________________ |
| |
| SD_Result_t SDC_GetSector(uint32_t addr,uint8_t *Buffer) |
| { |
| addr = addr << 9; // convert sectoradress to byteadress |
| return SDC_GetData(CMD_READ_SINGLE_BLOCK, addr, Buffer, 512); |
| } |
| |