Romilly Cocking / Mbed 2 deprecated Ser23K256

Library to drive the Microchip 23K256 SRAM over SPI.

Dependencies:   mbed

Ser23K256.h@2:f96c3c85aa3b, 2010-08-15 (annotated)

Committer:
romilly
Date:
Sun Aug 15 13:06:52 2010 +0000
Revision:
2:f96c3c85aa3b
Child:
3:d2314b1ac797
created a library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
romilly 2:f96c3c85aa3b 1 // Ser23K256 - drive the Microchip 23K256 SRAM using SPI
romilly 2:f96c3c85aa3b 2 // Copyright (c) 2010 Romilly Cocking
romilly 2:f96c3c85aa3b 3 // Released under the MIT License: http://mbed.org/license/mit
romilly 2:f96c3c85aa3b 4
romilly 2:f96c3c85aa3b 5 #include "mbed.h"
romilly 2:f96c3c85aa3b 6
romilly 2:f96c3c85aa3b 7 #ifndef SER23K256_H
romilly 2:f96c3c85aa3b 8 #define SER23K256_H
romilly 2:f96c3c85aa3b 9
romilly 2:f96c3c85aa3b 10 // mode codes for 23K256
romilly 2:f96c3c85aa3b 11 #define BYTE_MODE 0x00
romilly 2:f96c3c85aa3b 12 #define SEQUENTIAL_MODE 0x40
romilly 2:f96c3c85aa3b 13
romilly 2:f96c3c85aa3b 14 // command codes for 23K256
romilly 2:f96c3c85aa3b 15 #define READ 0x03
romilly 2:f96c3c85aa3b 16 #define WRITE 0x02
romilly 2:f96c3c85aa3b 17 #define READ_STATUS 0x05 // called RDSR in datasheet
romilly 2:f96c3c85aa3b 18 #define WRITE_STATUS 0x01 // called WRSR in datasheet
romilly 2:f96c3c85aa3b 19
romilly 2:f96c3c85aa3b 20 class Ser23K256 {
romilly 2:f96c3c85aa3b 21 public:
romilly 2:f96c3c85aa3b 22 Ser23K256(SPI& spi, PinName ncs);
romilly 2:f96c3c85aa3b 23 char read(int address);
romilly 2:f96c3c85aa3b 24 void read(int address, char * buffer, int count);
romilly 2:f96c3c85aa3b 25 void write(int address, char byte);
romilly 2:f96c3c85aa3b 26 void write(int address, char * buffer, int count);
romilly 2:f96c3c85aa3b 27 private:
romilly 2:f96c3c85aa3b 28 SPI& _spi;
romilly 2:f96c3c85aa3b 29 DigitalOut _ncs;
romilly 2:f96c3c85aa3b 30 char readStatus();
romilly 2:f96c3c85aa3b 31 void writeStatus(char status);
romilly 2:f96c3c85aa3b 32 void prepareCommand(char command, int address);
romilly 2:f96c3c85aa3b 33 void select();
romilly 2:f96c3c85aa3b 34 void deselect();
romilly 2:f96c3c85aa3b 35 };
romilly 2:f96c3c85aa3b 36
romilly 2:f96c3c85aa3b 37 #endif