[ FORK ] SPI flash memory control library forked from jyam/W25X40BV
Dependents: 11u35_usbLocalFilesystem
Fork of W25X40BV by
Diff: W25X40BV.h
- Revision:
- 4:b422cdc9d751
- Parent:
- 3:6e3c0b23dc6e
- Child:
- 6:11e271d4fbc5
--- a/W25X40BV.h Mon Mar 26 04:30:32 2012 +0000 +++ b/W25X40BV.h Sun Feb 28 15:22:40 2016 +0000 @@ -1,9 +1,11 @@ -// W25X40BV.h +/** W25X40BV.h +*/ #ifndef W25X40BV_H #define W25X40BV_H #include "mbed.h" +#include "SWSPI.h" #define SPI_FREQ 1000000 #define SPI_MODE 0 @@ -14,11 +16,14 @@ #define R_INST 0x03 #define W_INST 0x02 #define C_ERASE_INST 0x60 +#define P_ERASE_INST 0x81 +#define B4K_ERASE_INST 0x20 +#define B32K_ERASE_INST 0x52 #define DUMMY_ADDR 0x00 #define WAIT_TIME 1 -#define ADDR_BMASK2 0x00ff0000 +#define ADDR_BMASK2 0x001f0000 #define ADDR_BMASK1 0x0000ff00 #define ADDR_BMASK0 0x000000ff @@ -26,28 +31,60 @@ #define ADDR_BSHIFT1 8 #define ADDR_BSHIFT0 0 -class W25X40BV: public SPI { +/** +W25X40BV +*/ +class W25X40BV: public SWSPI { public: W25X40BV(PinName mosi, PinName miso, PinName sclk, PinName cs); - int readByte(int addr); // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location - int readByte(int a2, int a1, int a0); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] - void readStream(int addr, char* buf, int count); // takes a 24-bit address, reads count bytes, and stores results in buf + //! takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location + uint32_t readByte(uint32_t addr); + //! takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] + uint32_t readByte(uint32_t a2, uint32_t a1,uint32_t a0); + //! takes a 24-bit address, reads count bytes, and stores results in buf + void readStream(uint32_t addr, uint8_t* buf, uint32_t count); + + //! takes a 24-bit (3 bytes) address and a byte of data to write at that location + void writeByte(uint32_t addr, uint32_t data); + //! takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] + void writeByte(uint32_t a2, uint32_t a1, uint32_t a0, uint32_t data); + /** write count bytes of data from buf to memory, starting at addr + * addr is expected to be 256 byte alignment: 0x000000,0x000100,...,0x01FF00 + * even if not, it works anyway. but should care count and 256byte edge: + * if count=3 while addr=0x????FE, 3rd byte will be written in 0x????00 + * @param addr 24 bit address + * @param buf data buffer + * @param count data count in byte + */ + void writeStream(uint32_t addr, uint8_t* buf, uint32_t count); - void writeByte(int addr, int data); // takes a 24-bit (3 bytes) address and a byte of data to write at that location - void writeByte(int a2, int a1, int a0, int data); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] - void writeStream(int addr, char* buf, int count); // write count bytes of data from buf to memory, starting at addr + //! erase a page data(256bytes) on chip + void pageErase(uint8_t page); + + /** erase a block data(4Kbytes) on chip + * @param block block number 0x0000 - 0x001F + * block number will be left-shifted by 4 bits: 0x0000 - 0x01F0 + * and a dummy address byte (0x00) will be added + */ + void block4Erase(uint16_t block); - void chipErase(); // erase all data on chip + /** erase a block data(32Kbytes) on chip + * @param block number 0x00 - 0x03 + * block number will be left-shifted by 3 bits: 0x00 - 0x18 + * and two dummy address bytes (0x0000) will be added + */ + void block32Erase(uint8_t block); + void chipErase(); //! erase all data on chip private: - void writeEnable(); // write enable - void writeDisable(); // write disable - void chipEnable(); // chip enable - void chipDisable(); // chip disable + void writeEnable(); //! write enable + void writeDisable(); //! write disable + void chipEnable(); //! chip enable + void chipDisable(); //! chip disable - // SPI _spi; + //! SPI _spi; DigitalOut _cs; }; -#endif \ No newline at end of file +#endif