* * $Log: at49bv.c,v $ * Revision 1.2 2006/05/25 09:33:35 haraldkipp * Bugfix. At49bvParamWrite() returned an error when flash sector contents * was equal to the contents to write. * * Revision 1.1 2006/04/07 13:51:36 haraldkipp * AT49BV flash memory support added. A single sector may be used to * store system configurations in case there is no EEPROM available. * * *
Defines | |
#define | FLASH_CHIP_BASE |
Base address of the flash memory chip. | |
#define | FLASH_CONF_SECTOR |
Address offset of the configuration sector. | |
#define | FLASH_CONF_SIZE |
Size of the configuration area. | |
#define | FLASH_ERASE_WAIT |
#define | FLASH_CHIP_ERASE_WAIT |
#define | FLASH_WRITE_POLLS |
#define | FLASH_UNLOCK(base) |
#define | FLASH_COMMAND(base, cmd) |
#define | FLASH_CMD_ERASE |
#define | FLASH_CMD_ERASE_CHIP |
#define | FLASH_CMD_ERASE_SECTOR |
#define | FLASH_CMD_ENTER_ID |
#define | FLASH_CMD_EXIT_ID |
#define | FLASH_CMD_PROGRAM |
Typedefs | |
typedef unsigned short | flashdat_t |
typedef unsigned long | flashadr_t |
typedef volatile flashdat_t * | flashptr_t |
Functions | |
unsigned long | At49bvInit (void) |
int | At49bvSectorErase (u_int off) |
Erase sector at the specified offset. | |
int | At49bvChipErase (void) |
Erase entire flash memory chip. | |
int | At49bvSectorRead (u_int off, void *data, u_int len) |
Read data from flash memory. | |
int | At49bvSectorWrite (u_int off, CONST void *data, u_int len) |
Write data into flash memory. | |
int | At49bvParamRead (u_int pos, void *data, u_int len) |
Load configuration parameters from flash memory. | |
int | At49bvParamWrite (u_int pos, CONST void *data, u_int len) |
Store configuration parameters in flash memory. |
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Size of the configuration area. During write operations a buffer with this size is allocated from heap and may cause memory problems with large sectors. Thus, this value may be less than the size of the configuration sector, in which case the rest of the sector is unused. |
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Load configuration parameters from flash memory.
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Store configuration parameters in flash memory.
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Read data from flash memory.
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Write data into flash memory. The related sector must have been erased before calling this function.
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