Peter Drescher / EALib

The wait in mci_WaitForEvent will delay all card transactions.

Dependencies:   FATFileSystem

Fork of EALib by EmbeddedArtists AB

MCIFileSystem.h@0:0fdadbc3d852, 2013-09-26 (annotated)

Committer:
embeddedartists
Date:
Thu Sep 26 06:37:02 2013 +0000
Revision:
0:0fdadbc3d852
Child:
3:9d31a3c5013e
First version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:0fdadbc3d852 1 #ifndef MCIFILESYSTEM_H
embeddedartists 0:0fdadbc3d852 2 #define MCIFILESYSTEM_H
embeddedartists 0:0fdadbc3d852 3
embeddedartists 0:0fdadbc3d852 4 #include "mbed.h"
embeddedartists 0:0fdadbc3d852 5 #include "FATFileSystem.h"
embeddedartists 0:0fdadbc3d852 6
embeddedartists 0:0fdadbc3d852 7 /** Access the filesystem on an SD Card using MCI
embeddedartists 0:0fdadbc3d852 8 *
embeddedartists 0:0fdadbc3d852 9 * @code
embeddedartists 0:0fdadbc3d852 10 * #include "mbed.h"
embeddedartists 0:0fdadbc3d852 11 * #include "MCIFileSystem.h"
embeddedartists 0:0fdadbc3d852 12 *
embeddedartists 0:0fdadbc3d852 13 * MCIFileSystem mcifs("mci");
embeddedartists 0:0fdadbc3d852 14 *
embeddedartists 0:0fdadbc3d852 15 * int main() {
embeddedartists 0:0fdadbc3d852 16 * printf("Please insert a SD/MMC card\n");
embeddedartists 0:0fdadbc3d852 17 * while(!mcifs.cardInserted()) {
embeddedartists 0:0fdadbc3d852 18 * wait(0.5);
embeddedartists 0:0fdadbc3d852 19 * }
embeddedartists 0:0fdadbc3d852 20 *
embeddedartists 0:0fdadbc3d852 21 * FILE *fp = fopen("/mci/myfile.txt", "w");
embeddedartists 0:0fdadbc3d852 22 * if (fp != NULL) {
embeddedartists 0:0fdadbc3d852 23 * fprintf(fp, "Hello World!\n");
embeddedartists 0:0fdadbc3d852 24 * fclose(fp);
embeddedartists 0:0fdadbc3d852 25 * }
embeddedartists 0:0fdadbc3d852 26 * }
embeddedartists 0:0fdadbc3d852 27 * @endcode
embeddedartists 0:0fdadbc3d852 28 */
embeddedartists 0:0fdadbc3d852 29 class MCIFileSystem : public FATFileSystem {
embeddedartists 0:0fdadbc3d852 30 public:
embeddedartists 0:0fdadbc3d852 31
embeddedartists 0:0fdadbc3d852 32 /** Create the File System for accessing an SD/MMC Card using MCI
embeddedartists 0:0fdadbc3d852 33 *
embeddedartists 0:0fdadbc3d852 34 * @param name The name used to access the virtual filesystem
embeddedartists 0:0fdadbc3d852 35 * @param cd The pin connected to the CardDetect line
embeddedartists 0:0fdadbc3d852 36 */
embeddedartists 0:0fdadbc3d852 37 MCIFileSystem(const char* name, PinName cd = p38);
embeddedartists 0:0fdadbc3d852 38
embeddedartists 0:0fdadbc3d852 39 virtual ~MCIFileSystem();
embeddedartists 0:0fdadbc3d852 40
embeddedartists 0:0fdadbc3d852 41 virtual int disk_initialize();
embeddedartists 0:0fdadbc3d852 42 virtual int disk_status();
embeddedartists 0:0fdadbc3d852 43 virtual int disk_read(uint8_t * buffer, uint64_t block_number);
embeddedartists 0:0fdadbc3d852 44 virtual int disk_write(const uint8_t * buffer, uint64_t block_number);
embeddedartists 0:0fdadbc3d852 45 virtual int disk_sync();
embeddedartists 0:0fdadbc3d852 46 virtual uint64_t disk_sectors();
embeddedartists 0:0fdadbc3d852 47
embeddedartists 0:0fdadbc3d852 48 void mci_MCIIRQHandler();
embeddedartists 0:0fdadbc3d852 49 void mci_DMAIRQHandler();
embeddedartists 0:0fdadbc3d852 50
embeddedartists 0:0fdadbc3d852 51 /** Tests if a SD/MMC card is inserted or not.
embeddedartists 0:0fdadbc3d852 52 *
embeddedartists 0:0fdadbc3d852 53 * @returns
embeddedartists 0:0fdadbc3d852 54 * True if a card has been inserted,
embeddedartists 0:0fdadbc3d852 55 * False if no card is inserted or if the card detect pin is unavailable
embeddedartists 0:0fdadbc3d852 56 */
embeddedartists 0:0fdadbc3d852 57 bool cardInserted() const;
embeddedartists 0:0fdadbc3d852 58
embeddedartists 0:0fdadbc3d852 59 private:
embeddedartists 0:0fdadbc3d852 60
embeddedartists 0:0fdadbc3d852 61 typedef enum {
embeddedartists 0:0fdadbc3d852 62 CardStatusNumBytes = 4,
embeddedartists 0:0fdadbc3d852 63 } Constants;
embeddedartists 0:0fdadbc3d852 64
embeddedartists 0:0fdadbc3d852 65 typedef enum {
embeddedartists 0:0fdadbc3d852 66 PowerOff = 0,
embeddedartists 0:0fdadbc3d852 67 PowerUp = 2,
embeddedartists 0:0fdadbc3d852 68 PowerOn = 3,
embeddedartists 0:0fdadbc3d852 69 } power_ctrl_t;
embeddedartists 0:0fdadbc3d852 70
embeddedartists 0:0fdadbc3d852 71 typedef enum {
embeddedartists 0:0fdadbc3d852 72 SDMMC_IDLE_ST = 0, /*!< Idle state */
embeddedartists 0:0fdadbc3d852 73 SDMMC_READY_ST, /*!< Ready state */
embeddedartists 0:0fdadbc3d852 74 SDMMC_IDENT_ST, /*!< Identification State */
embeddedartists 0:0fdadbc3d852 75 SDMMC_STBY_ST, /*!< standby state */
embeddedartists 0:0fdadbc3d852 76 SDMMC_TRAN_ST, /*!< transfer state */
embeddedartists 0:0fdadbc3d852 77 SDMMC_DATA_ST, /*!< Sending-data State */
embeddedartists 0:0fdadbc3d852 78 SDMMC_RCV_ST, /*!< Receive-data State */
embeddedartists 0:0fdadbc3d852 79 SDMMC_PRG_ST, /*!< Programming State */
embeddedartists 0:0fdadbc3d852 80 SDMMC_DIS_ST /*!< Disconnect State */
embeddedartists 0:0fdadbc3d852 81 } CardState;
embeddedartists 0:0fdadbc3d852 82
embeddedartists 0:0fdadbc3d852 83
embeddedartists 0:0fdadbc3d852 84 typedef struct {
embeddedartists 0:0fdadbc3d852 85 uint8_t CmdIndex;
embeddedartists 0:0fdadbc3d852 86 uint32_t Data[CardStatusNumBytes];
embeddedartists 0:0fdadbc3d852 87 } response_t;
embeddedartists 0:0fdadbc3d852 88
embeddedartists 0:0fdadbc3d852 89 /**
embeddedartists 0:0fdadbc3d852 90 * @brief SDC Clock Control Options
embeddedartists 0:0fdadbc3d852 91 */
embeddedartists 0:0fdadbc3d852 92 typedef enum {
embeddedartists 0:0fdadbc3d852 93 SDC_CLOCK_ENABLE = 8, /*!< Enable SD Card Bus Clock */
embeddedartists 0:0fdadbc3d852 94 SDC_CLOCK_POWER_SAVE = 9, /*!< Disable SD_CLK output when bus is idle */
embeddedartists 0:0fdadbc3d852 95 SDC_CLOCK_DIVIDER_BYPASS = 10, /*!< Enable bypass of clock divide logic */
embeddedartists 0:0fdadbc3d852 96 SDC_CLOCK_WIDEBUS_MODE = 11, /*!< Enable wide bus mode (SD_DAT[3:0] is used instead of SD_DAT[0]) */
embeddedartists 0:0fdadbc3d852 97 } ClockControl;
embeddedartists 0:0fdadbc3d852 98
embeddedartists 0:0fdadbc3d852 99 /**
embeddedartists 0:0fdadbc3d852 100 * @brief SD/MMC Card specific setup data structure
embeddedartists 0:0fdadbc3d852 101 */
embeddedartists 0:0fdadbc3d852 102 typedef struct {
embeddedartists 0:0fdadbc3d852 103 uint32_t response[4]; /*!< Most recent response */
embeddedartists 0:0fdadbc3d852 104 uint32_t cid[4]; /*!< CID of acquired card */
embeddedartists 0:0fdadbc3d852 105 uint32_t csd[4]; /*!< CSD of acquired card */
embeddedartists 0:0fdadbc3d852 106 uint32_t ext_csd[512 / 4]; /*!< Ext CSD */
embeddedartists 0:0fdadbc3d852 107 uint32_t card_type; /*!< Card Type */
embeddedartists 0:0fdadbc3d852 108 uint16_t rca; /*!< Relative address assigned to card */
embeddedartists 0:0fdadbc3d852 109 uint32_t speed; /*!< Speed */
embeddedartists 0:0fdadbc3d852 110 uint32_t block_len; /*!< Card sector size */
embeddedartists 0:0fdadbc3d852 111 uint32_t device_size; /*!< Device Size */
embeddedartists 0:0fdadbc3d852 112 uint32_t blocknr; /*!< Block Number */
embeddedartists 0:0fdadbc3d852 113 uint32_t clk_rate; /*!< Clock rate */
embeddedartists 0:0fdadbc3d852 114 } SDMMC_CARD_T;
embeddedartists 0:0fdadbc3d852 115
embeddedartists 0:0fdadbc3d852 116 typedef enum {
embeddedartists 0:0fdadbc3d852 117 SDC_RET_OK = 0,
embeddedartists 0:0fdadbc3d852 118 SDC_RET_CMD_FAILED = -1,
embeddedartists 0:0fdadbc3d852 119 SDC_RET_BAD_PARAMETERS = -2,
embeddedartists 0:0fdadbc3d852 120 SDC_RET_BUS_NOT_IDLE = -3,
embeddedartists 0:0fdadbc3d852 121 SDC_RET_TIMEOUT = -4,
embeddedartists 0:0fdadbc3d852 122 SDC_RET_ERR_STATE = -5,
embeddedartists 0:0fdadbc3d852 123 SDC_RET_NOT_READY = -6,
embeddedartists 0:0fdadbc3d852 124 SDC_RET_FAILED = -7,
embeddedartists 0:0fdadbc3d852 125 } ReturnCode;
embeddedartists 0:0fdadbc3d852 126
embeddedartists 0:0fdadbc3d852 127 void initMCI();
embeddedartists 0:0fdadbc3d852 128
embeddedartists 0:0fdadbc3d852 129 int32_t mci_Acquire();
embeddedartists 0:0fdadbc3d852 130 uint32_t mci_GetCardStatus() const;
embeddedartists 0:0fdadbc3d852 131 CardState mci_GetCardState() const;
embeddedartists 0:0fdadbc3d852 132 ReturnCode mci_ReadBlocks(void *buffer, int32_t startBlock, int32_t blockNum);
embeddedartists 0:0fdadbc3d852 133 ReturnCode mci_WriteBlocks(void *buffer, int32_t startBlock, int32_t blockNum);
embeddedartists 0:0fdadbc3d852 134 void mci_SetClock(uint32_t freq) const;
embeddedartists 0:0fdadbc3d852 135 void mci_ClockControl(ClockControl ctrlType, bool enable) const;
embeddedartists 0:0fdadbc3d852 136 void mci_PowerControl(power_ctrl_t powerMode, uint32_t flag) const;
embeddedartists 0:0fdadbc3d852 137 ReturnCode mci_ExecuteCmd(uint32_t Command, uint32_t Arg, response_t* pResp) const;
embeddedartists 0:0fdadbc3d852 138 ReturnCode mci_SendIfCond() const;
embeddedartists 0:0fdadbc3d852 139 ReturnCode mci_SendOpCond(uint32_t *pOCR) const;
embeddedartists 0:0fdadbc3d852 140 ReturnCode mci_SendAppOpCond(uint16_t rca, bool hcs, uint32_t *pOcr, bool *pCCS) const;
embeddedartists 0:0fdadbc3d852 141 ReturnCode mci_GetCID(uint32_t *pCID) const;
embeddedartists 0:0fdadbc3d852 142 ReturnCode mci_SetAddr(uint16_t addr) const;
embeddedartists 0:0fdadbc3d852 143 ReturnCode mci_GetAddr(uint16_t *pRCA) const;
embeddedartists 0:0fdadbc3d852 144 ReturnCode mci_GetCSD(uint16_t rca, uint32_t *pCSD) const;
embeddedartists 0:0fdadbc3d852 145 ReturnCode mci_SelectCard(uint16_t addr) const;
embeddedartists 0:0fdadbc3d852 146 ReturnCode mci_GetStatus(uint16_t rca, uint32_t *pStatus) const;
embeddedartists 0:0fdadbc3d852 147 void mci_ProcessCSD();
embeddedartists 0:0fdadbc3d852 148 ReturnCode mci_SetBusWidth(uint16_t rca, uint8_t width) const;
embeddedartists 0:0fdadbc3d852 149 ReturnCode mci_SetTranState(uint16_t rca) const;
embeddedartists 0:0fdadbc3d852 150 ReturnCode mci_SetBlockLength(uint32_t rca, uint32_t block_len) const;
embeddedartists 0:0fdadbc3d852 151 ReturnCode mci_SetCardParams() const;
embeddedartists 0:0fdadbc3d852 152 ReturnCode mci_StopTransmission(uint32_t rca) const;
embeddedartists 0:0fdadbc3d852 153 bool mci_CheckR1Response(uint32_t resp, ReturnCode* pCheckResult) const;
embeddedartists 0:0fdadbc3d852 154 void mci_WriteDelay() const;
embeddedartists 0:0fdadbc3d852 155 ReturnCode mci_SendCmd(uint32_t Command, uint32_t Arg, uint32_t timeout) const;
embeddedartists 0:0fdadbc3d852 156 ReturnCode mci_SendAppCmd(uint16_t rca) const;
embeddedartists 0:0fdadbc3d852 157 void mci_SetDataTransfer(uint16_t BlockNum, bool DirFromCard, uint32_t Timeout) const;
embeddedartists 0:0fdadbc3d852 158 void mci_GetResp(response_t* pResp) const;
embeddedartists 0:0fdadbc3d852 159 uint32_t mci_GetBits(int32_t start, int32_t end, uint32_t *data) const;
embeddedartists 0:0fdadbc3d852 160 void mci_SetCommand(uint32_t Cmd, uint32_t Arg) const;
embeddedartists 0:0fdadbc3d852 161 void mci_ResetCommand() const;
embeddedartists 0:0fdadbc3d852 162 int32_t mci_IRQHandler(uint8_t *txBuf, uint32_t *txCnt, uint8_t *rxBuf, uint32_t *rxCnt);
embeddedartists 0:0fdadbc3d852 163 int32_t mci_FIFOIRQHandler(uint8_t *txBuf, uint32_t *txCnt, uint8_t *rxBuf, uint32_t *rxCnt);
embeddedartists 0:0fdadbc3d852 164 void mci_ReadFIFO(uint32_t *pDst, bool bFirstHalf) const;
embeddedartists 0:0fdadbc3d852 165 void mci_WriteFIFO(uint32_t *pSrc, bool bFirstHalf) const;
embeddedartists 0:0fdadbc3d852 166
embeddedartists 0:0fdadbc3d852 167 void mci_SetupEventWakeup(uint8_t dmaChannel);
embeddedartists 0:0fdadbc3d852 168 uint32_t mci_WaitForEvent() const;
embeddedartists 0:0fdadbc3d852 169
embeddedartists 0:0fdadbc3d852 170 ReturnCode _readBlocks(uint32_t card_type, uint32_t startBlock, uint32_t blockNum) const;
embeddedartists 0:0fdadbc3d852 171 ReturnCode _writeBlocks(uint32_t card_type, uint32_t startBlock, uint32_t blockNum) const;
embeddedartists 0:0fdadbc3d852 172
embeddedartists 0:0fdadbc3d852 173
embeddedartists 0:0fdadbc3d852 174 uint32_t _Stat;
embeddedartists 0:0fdadbc3d852 175 SDMMC_CARD_T _sdCardInfo;
embeddedartists 0:0fdadbc3d852 176
embeddedartists 0:0fdadbc3d852 177 DigitalIn* _cardDetect;
embeddedartists 0:0fdadbc3d852 178
embeddedartists 0:0fdadbc3d852 179 uint8_t _eventDmaChannel; /*!< DMA Channel used for transfer data */
embeddedartists 0:0fdadbc3d852 180 volatile bool _eventReceived;
embeddedartists 0:0fdadbc3d852 181 volatile bool _eventSuccess;
embeddedartists 0:0fdadbc3d852 182 };
embeddedartists 0:0fdadbc3d852 183
embeddedartists 0:0fdadbc3d852 184 #endif
embeddedartists 0:0fdadbc3d852 185