128K Serial EEPROM read write erase chip erase functions SPI EEPROM Nucleo F767ZI
EE25LC1024.h
- Committer:
- shivanandgowdakr
- Date:
- 2018-10-23
- Revision:
- 2:156c427681f0
- Parent:
- 0:81848bf6dd4a
File content as of revision 2:156c427681f0:
// EE25LC1024.h #ifndef EE25LC1024_H #define EE25LC1024_H #include "mbed.h" #include <string> #define SPI_Freq 10000000 //Change SPI Frequency Here #define SPI_MODE 0 // SPI Mode can be 0 or 3 . see data sheet #define SPI_NBIT 8 // Number of bits 8. #define DUMMY_ADDR 0x00 #define WAIT_TIME 1 #define ADDR_BMASK3 0xff000000 #define ADDR_BMASK2 0x00ff0000 #define ADDR_BMASK1 0x0000ff00 #define ADDR_BMASK0 0x000000ff #define ADDR_BSHIFT3 24 #define ADDR_BSHIFT2 16 #define ADDR_BSHIFT1 8 #define ADDR_BSHIFT0 0 #define READ 0x03 //0000 0011 Read data from memory array beginning at selected address #define WRITE 0x02 //0000 0010 Write data to memory array beginning at selected address #define WREN 0x06 //0000 0110 Set the write enable latch (enable write operations) #define WRDI 0x04 //0000 0100 Reset the write enable latch (disable write operations) #define RDSR 0x05 //0000 0101 Read STATUS register #define WRSR 0x01 //0000 0001 Write STATUS register #define PE 0x42 //0100 0010 Page Erase – erase one page in memory array #define SE 0xD8 //1101 1000 Sector Erase – erase one sector in memory array #define CE 0xC7 //1100 0111 Chip Erase – erase all sectors in memory array #define Readid 0xAB //1010 1011 Release from Deep power-down and read electronic signature #define DPD 0xB9 //1011 1001 Deep Power-Down mode #define DUMMYBYTE 0x00 //Dummy byte for Read Operation class EE25LC1024: public SPI { public: EE25LC1024(PinName mosi, PinName miso, PinName sclk, PinName cs); void deepPowerDown(void); int readByte(int addr); // takes a 24-bit (3 bytes) address and returns the data (1 byte) at that location void readStream(int addr, char* buf, int count); // takes a 24-bit address, reads count bytes, and stores results in buf int ReleaseDPD_ReadSign(void); void writeByte(int addr, int data); // takes a 24-bit (3 bytes) address and a byte of data to write at that location void writeStream(int addr, char* buf, int count); // write count bytes of data from buf to memory, starting at addr void writeString(int add, string str); void sectorErase(int addr); void pageErase(int addr); void chipErase(); //erase all data on chip uint8_t readRegister(); uint8_t checkIfBusy(); // Check if IC is bury writing or erasing void writeRegister(uint8_t regValue); // Write status register or configuration register long readLong(int address); // Read long int number void writeLong(int addr, long value); // Write Long Integer Number private: void writeEnable(); // write enable void writeDisable(); // write disable void chipEnable(); // chip enable void chipDisable(); // chip disable // SPI _spi; DigitalOut _cs; }; #endif