[ FORK ] SPI flash memory control library forked from jyam/W25X40BV
Dependents: 11u35_usbLocalFilesystem
Fork of W25X40BV by
Diff: W25X40BV.h
- Revision:
- 0:9de212faf980
- Child:
- 1:cd41b8e3fdad
diff -r 000000000000 -r 9de212faf980 W25X40BV.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/W25X40BV.h Mon Mar 19 10:20:37 2012 +0000 @@ -0,0 +1,51 @@ +// W25X40BV.h + +#ifndef W25X40BV_H +#define W25X40BV_H + +#include "mbed.h" + +#define SPI_FREQ 1000000 +#define SPI_MODE 0 +#define SPI_NBIT 8 + +#define WE_INST 0x06 +#define WD_INST 0x04 +#define R_INST 0x03 +#define W_INST 0x02 +#define C_ERASE_INST 0x60 + +#define DUMMY_ADDR 0x00 +#define WAIT_TIME 1 + +#define ADDR_BMASK2 0x00ff0000 +#define ADDR_BMASK1 0x0000ff00 +#define ADDR_BMASK0 0x000000ff + +#define ADDR_BSHIFT2 16 +#define ADDR_BSHIFT1 8 +#define ADDR_BSHIFT0 0 + +class W25X40BV { +public: + W25X40BV(PinName mosi, PinName miso, PinName sclk, PinName cs); + + int read(int addr); // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location + int read(int a2, int a1, int a0); // takes the address in 3 separate bytes A[23,16], A[15,8], A[7,0] + + void write(int addr, int data); // takes a 24-bit (3 bytes) address and a byte of data to write at that location + void write(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 chipErase(); // erase all data on chip + +private: + void writeEnable(); // write enable + void writeDisable(); // write disable + void chipEnable(); // chip enable + void chipDisable(); // chip disable + + SPI _spi; + DigitalOut _cs; +}; + +#endif \ No newline at end of file