mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-25 13:31:37 +00:00
389 lines
12 KiB
C
389 lines
12 KiB
C
/*
|
|
Copyright 2007, Freie Universitaet Berlin. All rights reserved.
|
|
|
|
These sources were developed at the Freie Universität Berlin, Computer
|
|
Systems and Telematics group.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are
|
|
met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of Freie Universitaet Berlin (FUB) nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
This software is provided by FUB and the contributors on an "as is"
|
|
basis, without any representations or warranties of any kind, express
|
|
or implied including, but not limited to, representations or
|
|
warranties of non-infringement, merchantability or fitness for a
|
|
particular purpose. In no event shall FUB or contributors be liable
|
|
for any direct, indirect, incidental, special, exemplary, or
|
|
consequential damages (including, but not limited to, procurement of
|
|
substitute goods or services; loss of use, data, or profits; or
|
|
business interruption) however caused and on any theory of liability,
|
|
whether in contract, strict liability, or tort (including negligence
|
|
or otherwise) arising in any way out of the use of this software, even
|
|
if advised of the possibility of such damage.
|
|
|
|
This implementation was developed by the CST group at the FUB.
|
|
|
|
For documentation and questions please use the web site
|
|
http://scatterweb.mi.fu-berlin.de and the mailinglist
|
|
scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
|
|
Berlin, 2007
|
|
*/
|
|
|
|
/**
|
|
* @file ScatterWeb.Sd.h
|
|
* @ingroup libsd
|
|
* @brief MMC-/SD-Card library, Public interface
|
|
*
|
|
* @author Michael Baar <baar@inf.fu-berlin.de>
|
|
* @version $Revision: 1.4 $
|
|
*
|
|
* $Id: sd.h,v 1.4 2008/03/31 13:48:03 nvt-se Exp $
|
|
*/
|
|
|
|
/**
|
|
* @ingroup libsd
|
|
* @{
|
|
*/
|
|
|
|
#ifndef __SD_H__
|
|
#define __SD_H__
|
|
|
|
#include "contiki-conf.h"
|
|
|
|
#define SD_BLOCKLENGTH_INVALID 0xFF
|
|
#define SD_WRITE_BLOCKLENGTH_BIT 9
|
|
#define SD_WRITE_BLOCKLENGTH 0x200
|
|
|
|
|
|
/******************************************************************************
|
|
* @name Setup, initialisation, configuration
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief SD Flags
|
|
* @see sd_state_t
|
|
* @{
|
|
*/
|
|
enum sd_state_flags {
|
|
SD_READ_PARTIAL = 0x80,
|
|
SD_WRITE_PARTIAL = 0x40,
|
|
SD_INITIALIZED = 0x01
|
|
};
|
|
|
|
/** @} */
|
|
|
|
#ifdef __TI_COMPILER_VERSION__
|
|
#pragma pack(1)
|
|
#endif
|
|
|
|
/**
|
|
* @brief Card Identification Register
|
|
*/
|
|
#ifndef __TI_COMPILER_VERSION__
|
|
__attribute__ ((packed))
|
|
#endif
|
|
#if defined(__MSP430GCC__)
|
|
__attribute__ ((packed))
|
|
#endif
|
|
struct sd_cid {
|
|
uint8_t mid;
|
|
char oid[2];
|
|
char pnm[5];
|
|
uint8_t revision;
|
|
uint32_t psn;
|
|
uint16_t:4;
|
|
uint16_t mdt:12;
|
|
uint8_t crc7:7;
|
|
uint8_t:1;
|
|
};
|
|
#ifdef __TI_COMPILER_VERSION__
|
|
#pragma pack()
|
|
#endif
|
|
|
|
/**
|
|
* @name Card Specific Data register
|
|
* @{
|
|
*/
|
|
struct sd_csd {
|
|
uint8_t raw[16];
|
|
};
|
|
#define SD_CSD_READ_BL_LEN(csd) (( csd ).raw[5] & 0x0F) // uchar : 4
|
|
#define SD_CSD_READ_PARTIAL(csd) (( csd ).raw[ 6] & 0x80) // bool
|
|
#define SD_CSD_CCC(csd) ( (( csd ).raw[4]<<4) | (( csd ).raw[5]>>4) ) // uchar
|
|
#define SD_CSD_WRITE_PARTIAL(csd) (( csd ).raw[13] & 0x04) // bool
|
|
#define SD_CSD_C_SIZE(csd) ( ((( csd ).raw[6] & 0x03)<<10) | (( csd ).raw[7]<<2) | (( csd ).raw[8]>>6) ) // uint : 12
|
|
#define SD_CSD_C_MULT(csd) ( ((( csd ).raw[9] & 0x03)<<1) | (( csd ).raw[10]>>7) ) // uchar : 4
|
|
|
|
/** @} */
|
|
|
|
/// Card access library state
|
|
#define SD_CACHE_LOCKED 0x01
|
|
#define SD_CACHE_DIRTY 0x02
|
|
|
|
typedef struct {
|
|
char buffer[SD_WRITE_BLOCKLENGTH];
|
|
uint32_t address;
|
|
uint8_t state;
|
|
} sd_cache_t;
|
|
|
|
typedef struct {
|
|
uint16_t MinBlockLen_bit:4; ///< minimum supported blocklength
|
|
uint16_t MaxBlockLen_bit:4; ///< maximum supported blocklength
|
|
uint16_t Flags:8; ///< feature flags
|
|
uint8_t BlockLen_bit; ///< currently selected blocklength as bit value (n where BlockLen is 2^n)
|
|
uint16_t BlockLen; ///< currently selected blocklength for reading and writing
|
|
#if SD_CACHE
|
|
sd_cache_t *Cache;
|
|
#endif
|
|
} sd_state_t;
|
|
|
|
extern volatile sd_state_t sd_state; ///< Card access library state
|
|
|
|
/**
|
|
* @brief Library initialisation
|
|
*/
|
|
void sd_init(void);
|
|
|
|
/**
|
|
* @brief Setup ports for sd card communication
|
|
*
|
|
* This function needs to be called once before any other library function.
|
|
* It invokes ::Spi_enable to configure UART1 for SPI communication.
|
|
*
|
|
* If you need to reconfigure the UART for other operations only call
|
|
* ::Spi_enable to return to SPI mode. ::sd_setup needs to be run only once.
|
|
*/
|
|
void sd_init_platform(void);
|
|
|
|
/**
|
|
* @brief Return value of ::sd_init function
|
|
*/
|
|
enum sd_init_ret {
|
|
SD_INIT_SUCCESS = 0,
|
|
SD_INIT_NOCARD = 1,
|
|
SD_INIT_FAILED = 2,
|
|
SD_INIT_NOTSUPP = 3
|
|
};
|
|
|
|
/**
|
|
* @brief Return value of write functions
|
|
* @see ::sd_write, ::sd_write_block
|
|
*/
|
|
enum sd_write_ret {
|
|
SD_WRITE_SUCCESS = 0, ///< writing successfull
|
|
SD_WRITE_PROTECTED_ERR = 1, ///< card write protected
|
|
SD_WRITE_INTERFACE_ERR = 2, ///< error in UART SPI interface
|
|
SD_WRITE_COMMAND_ERR = 3, ///< error in write command or command arguments (e.g. target address)
|
|
SD_WRITE_STORE_ERR = 4, ///< storing written data to persistant memory on card failed
|
|
SD_WRITE_DMA_ERR = 5
|
|
};
|
|
|
|
/**
|
|
* @brief Initialize card and state
|
|
* @return one of sd_init_ret
|
|
*
|
|
* Initializes the memory card, checks supported voltage range and
|
|
* functionality. Initializes the global state struct sd_state.
|
|
* Should be invoked once immediately after ::sd_setup.
|
|
*/
|
|
enum sd_init_ret sd_init_card(sd_cache_t * pCache);
|
|
|
|
/**
|
|
* @brief Last operation to call when finished with using the card.
|
|
*/
|
|
void sd_close(void);
|
|
|
|
/**
|
|
* @brief SD Card physically present?
|
|
* @return if no card present returns 0
|
|
*/
|
|
#define sd_detected() ((P2IN & 0x40) == 0)
|
|
|
|
/**
|
|
* @brief SD Card locked by switch?
|
|
* @return if card is not locked returns 0
|
|
*/
|
|
#define sd_protected() ((P2IN & 0x80) != 0)
|
|
|
|
/**
|
|
* @brief Set blocklength to 2 ^ n
|
|
*
|
|
* Tries to set the card's blocklength for reading and writing to any
|
|
* 2^n value, where n shall be between 0 and 11.
|
|
* Be aware that a card may or may not support different blocksizes.
|
|
*
|
|
* Since all read and write operations have to use blockaligned addresses
|
|
* and need to process complete blocks always try to use the optimal blocksize
|
|
* and let ::sd_read do the rest. If the blocklength is already set to the new
|
|
* value nothing is done.
|
|
*
|
|
* \Note
|
|
* The default blocklength is 512 (n=9). SD Cards usually support partial blocks
|
|
* with a blocklength of 1 to 512 (n=0 to n=9), MMC cards don't.
|
|
* Large cards support blocklength up to 2048 (n=11).
|
|
* The supported range of blocklengths can be read as n-value from
|
|
* sd_state.BlockLenMin_bit and sd_state.BlockLneMax_bit. The current value
|
|
* is available as n-value in sd_state.Blocsd_state.BlockLen_bit and as byte-value
|
|
* in sd_state.BlockLen.
|
|
*
|
|
* @param[in] blocklength_bit blocklength as n-value of 2^n
|
|
*
|
|
* @return Returns blocklength_bit if set operation was successful or
|
|
* SD_BLOCKLENGTH_INVALID otherwise.
|
|
*
|
|
*/
|
|
uint8_t sd_set_blocklength(const uint8_t blocklength_bit);
|
|
|
|
/**
|
|
* @brief Align byte address to current blocklength
|
|
* @param[in,out] pAddress address to align, will be modified to be block aligned
|
|
* @return Offset from aligned address to original address
|
|
*/
|
|
uint16_t sd_AlignAddress(uint32_t * pAddress);
|
|
|
|
/**
|
|
* @brief Read one complete block from a block aligned address into buffer
|
|
*
|
|
* This function reads a single block of the currently set blocklength
|
|
* from a block aligned address.
|
|
*
|
|
* \Note: If address is not block aligned the card will respond with an error
|
|
* and no bytes will be read.
|
|
*
|
|
* @param[out] pBuffer Pointer to a buffer to which data is read. It should be least
|
|
* 1 byte large
|
|
* @param[in] address The address of the first byte that shall be read to pBuffer
|
|
*
|
|
* @return Number of bytes read (should always be = sd_state.BlockLen)
|
|
*/
|
|
uint16_t sd_read_block(void (*const pBuffer), const uint32_t address);
|
|
|
|
#if SD_READ_BYTE
|
|
/**
|
|
* @brief Read one byte from any address
|
|
* This function reads a single byte from any address. It is optimized for best speed
|
|
* at any blocklength.
|
|
* \Note: blocklength is modified
|
|
*
|
|
* @param[out] pBuffer Pointer to a buffer to which data is read. It should be least
|
|
* 1 byte large
|
|
* @param[in] address The address of the byte that shall be read to pBuffer
|
|
*
|
|
* @return Number of bytes read (usually 1)
|
|
*/
|
|
bool sd_read_byte(void *pBuffer, const uint32_t address);
|
|
#endif
|
|
|
|
#if SD_WRITE
|
|
/**
|
|
* @brief Write one complete block at a block aligned address from buffer to card
|
|
*
|
|
* @param[in] address block aligned address to write to
|
|
* @param[in] pBuffer pointer to buffer with a block of data to write
|
|
* @return result code (see enum #sd_write_ret)
|
|
*
|
|
* \Note
|
|
* Only supported block size for writing is usually 512 bytes.
|
|
*/
|
|
enum sd_write_ret sd_write_block(const uint32_t address,
|
|
void const (*const pBuffer));
|
|
|
|
/**
|
|
* @brief Fill one complete block at a block aligned address with
|
|
* a single character.
|
|
*
|
|
* @param[in] address block aligned address to write to
|
|
* @param[in] pChar pointer to buffer with a character to write
|
|
* @return result code (see enum #sd_write_ret)
|
|
*
|
|
* @note Use this for settings blocks to 0x00.
|
|
* Only supported block size for writing is usually 512 bytes.
|
|
*/
|
|
enum sd_write_ret sd_set_block(const uint32_t address,
|
|
const char (*const pChar));
|
|
|
|
/**
|
|
* @brief Flush the DMA write buffer
|
|
*
|
|
* Wait for a running DMA write operation to finish
|
|
*/
|
|
enum sd_write_ret sd_write_flush(void);
|
|
#endif
|
|
|
|
#if SD_CACHE
|
|
#define SD_WAIT_LOCK(x) while( x ->state & SD_CACHE_LOCKED ) { _NOP(); }
|
|
#define SD_GET_LOCK(x) do { while( x ->state & SD_CACHE_LOCKED ) { _NOP(); }; x ->state |= SD_CACHE_LOCKED; } while(0)
|
|
#define SD_FREE_LOCK(x) do { x ->state &= ~SD_CACHE_LOCKED; } while(0)
|
|
|
|
/**
|
|
* @brief Flush the sd cache
|
|
*
|
|
* Writes back the cache buffer, if it has been modified. Call this if
|
|
* a high level operation has finished and you want to store all data
|
|
* persistantly. The write back operation does not use timers.
|
|
*/
|
|
void sd_cache_flush(void);
|
|
|
|
/**
|
|
* @brief Read a block into the cache buffer
|
|
* @internal
|
|
*
|
|
* You won't usually need this operation.
|
|
*/
|
|
sd_cache_t *sd_cache_read_block(const uint32_t * blAdr);
|
|
#endif
|
|
|
|
/**
|
|
* @brief Erase (clear) blocks of data
|
|
* @param[in] address Starting address of first block to erase
|
|
* @param[in] numBlocks Number of blocks to erase (starting at address)
|
|
* @return true if successful
|
|
* @note Data can only be erased in whole blocks. All bytes will be set
|
|
* predifined character (see CSD). Common cards use 0xFF.
|
|
*/
|
|
bool sd_erase_blocks(const uint32_t address, const uint16_t numBlocks);
|
|
|
|
/**
|
|
* @brief Read card identification register (CID)
|
|
* @param[out] pCID Pointer to buffer for CID
|
|
* @return Number of bytes read (= size of CID) or 0 if failed
|
|
*
|
|
* @see ::sd_cid_t
|
|
*/
|
|
uint16_t sd_read_cid(struct sd_cid *pCID);
|
|
|
|
/**
|
|
* @brief Read size of card
|
|
* @return Number of bytes available
|
|
*
|
|
* Reads the number of bytes in the card memory from the CSD register.
|
|
*/
|
|
uint32_t sd_get_size(void);
|
|
|
|
#if SD_READ_ANY
|
|
/**
|
|
* @brief Read any number of bytes from any address into buffer
|
|
*
|
|
* @param[out] pBuffer Pointer to a buffer to which data is read. It should be least
|
|
* size bytes large
|
|
* @param[in] address The address of the first byte that shall be read to pBuffer
|
|
* @param[in] size Number of bytes which shall be read starting at address */
|
|
uint16_t sd_read(void *pBuffer, uint32_t address, uint16_t size);
|
|
#endif
|
|
|
|
#endif /*__SD_H__*/
|
|
|
|
/** @} */
|