Imayan chan / EEPROM_AT93C46

4-GPIO controlled EEPROM AT93C46

EEPROM_AT93C46.h@0:9cc1d5ebe758, 2014-05-09 (annotated)

Committer:
king33jp
Date:
Fri May 09 02:17:12 2014 +0000
Revision:
0:9cc1d5ebe758
Child:
1:c846ecbfe067
3wire EEPROM AT93C46; GPIO access

Who changed what in which revision?

UserRevisionLine numberNew contents of line
king33jp 0:9cc1d5ebe758 1 #ifndef MBED_EEPROM_AT93C46_H
king33jp 0:9cc1d5ebe758 2 #define MBED_EEPROM_AT93C46_H
king33jp 0:9cc1d5ebe758 3
king33jp 0:9cc1d5ebe758 4 #include "mbed.h"
king33jp 0:9cc1d5ebe758 5 /** @file
king33jp 0:9cc1d5ebe758 6 * AT93C46A x16 mode(7pin OC mean NC ,maybe)
king33jp 0:9cc1d5ebe758 7 * AT93C46E x16 mode(7pin NC)
king33jp 0:9cc1d5ebe758 8 * AT93C46D x16 mode(7pin ORG,H=x16,L=x8)
king33jp 0:9cc1d5ebe758 9 * Cap=1Kbits 64words @ x16
king33jp 0:9cc1d5ebe758 10 * SB(start bit)=1bit OP-code=2bits Addr=6bits(64word)
king33jp 0:9cc1d5ebe758 11 * controll use gpib port(Outoutx3,Inputx1)
king33jp 0:9cc1d5ebe758 12 */
king33jp 0:9cc1d5ebe758 13
king33jp 0:9cc1d5ebe758 14 /** @def
king33jp 0:9cc1d5ebe758 15 * Command code define
king33jp 0:9cc1d5ebe758 16 *
king33jp 0:9cc1d5ebe758 17 */
king33jp 0:9cc1d5ebe758 18 #define EE_READ 0x80 // 10 xxxxxx(A5-A0)
king33jp 0:9cc1d5ebe758 19 #define EE_WRITE 0x40 // 01 xxxxxx(A5-A0)
king33jp 0:9cc1d5ebe758 20 #define EE_EWEN 0x3F // 00 11XXXX(X is DONT CARE)
king33jp 0:9cc1d5ebe758 21 #define EE_EWDS 0x00 // 00 00XXXX(X is DONT CARE)
king33jp 0:9cc1d5ebe758 22 #define EE_ERASE 0xC0 // 11 xxxxxx(A5-A0)
king33jp 0:9cc1d5ebe758 23
king33jp 0:9cc1d5ebe758 24 class EEPROM_AT93C46 {
king33jp 0:9cc1d5ebe758 25 public:
king33jp 0:9cc1d5ebe758 26
king33jp 0:9cc1d5ebe758 27 /** Create a EEPROM_AT93C46 object connected to four pins
king33jp 0:9cc1d5ebe758 28 *
king33jp 0:9cc1d5ebe758 29 * @param eccs pin connected to CS of AT93C46
king33jp 0:9cc1d5ebe758 30 * @param eeck pin connected to CLK of AT93C46
king33jp 0:9cc1d5ebe758 31 * @param eedi pin connected to DI of AT93C46
king33jp 0:9cc1d5ebe758 32 * @param eedo pin connected to DO of AT93C46
king33jp 0:9cc1d5ebe758 33 */
king33jp 0:9cc1d5ebe758 34 EEPROM_AT93C46(PinName eecs,PinName eeck,PinName eedi,PinName eedo);
king33jp 0:9cc1d5ebe758 35
king33jp 0:9cc1d5ebe758 36 /** data=8bit
king33jp 0:9cc1d5ebe758 37 * I send to AT93C46 with 9bit data(start bit added )
king33jp 0:9cc1d5ebe758 38 * bit send with wait_us(1),so
king33jp 0:9cc1d5ebe758 39 * @param Sending data to AT93C46
king33jp 0:9cc1d5ebe758 40 */
king33jp 0:9cc1d5ebe758 41 void send(char data);
king33jp 0:9cc1d5ebe758 42
king33jp 0:9cc1d5ebe758 43 /** Data read ftom AT93C46
king33jp 0:9cc1d5ebe758 44 * send( OP-code|addr )
king33jp 0:9cc1d5ebe758 45 * @param address(6bit)
king33jp 0:9cc1d5ebe758 46 */
king33jp 0:9cc1d5ebe758 47 unsigned short read(char addr);
king33jp 0:9cc1d5ebe758 48
king33jp 0:9cc1d5ebe758 49 /** Data read ftom AT93C46
king33jp 0:9cc1d5ebe758 50 * send( OP-code|addr )
king33jp 0:9cc1d5ebe758 51 * @param address(6bit)
king33jp 0:9cc1d5ebe758 52 * @ret data( unsigned short 1 word )
king33jp 0:9cc1d5ebe758 53 */
king33jp 0:9cc1d5ebe758 54 void write_enable();
king33jp 0:9cc1d5ebe758 55 /** Do write-enable to AT93C46
king33jp 0:9cc1d5ebe758 56 * send( OP-code )
king33jp 0:9cc1d5ebe758 57 * @param address(6bit)
king33jp 0:9cc1d5ebe758 58 */
king33jp 0:9cc1d5ebe758 59 void write_disable();
king33jp 0:9cc1d5ebe758 60 /** Do write-disable to AT93C46
king33jp 0:9cc1d5ebe758 61 * send( OP-code )
king33jp 0:9cc1d5ebe758 62 * @param address(6bit)
king33jp 0:9cc1d5ebe758 63 */
king33jp 0:9cc1d5ebe758 64 void erase(char addr);
king33jp 0:9cc1d5ebe758 65
king33jp 0:9cc1d5ebe758 66 /** Data erase to AT93C46
king33jp 0:9cc1d5ebe758 67 * send( OP-code|addr )
king33jp 0:9cc1d5ebe758 68 * @param address(6bit) , write data(16bit=short)
king33jp 0:9cc1d5ebe758 69 */
king33jp 0:9cc1d5ebe758 70 void write(char addr,unsigned short data);
king33jp 0:9cc1d5ebe758 71
king33jp 0:9cc1d5ebe758 72 private:
king33jp 0:9cc1d5ebe758 73 DigitalOut _eecs; //AT93C46 CS ,active H
king33jp 0:9cc1d5ebe758 74 DigitalOut _eeck; //AT93C46 CLK,rise-edge is write,fall-edge is read
king33jp 0:9cc1d5ebe758 75 DigitalOut _eedi; //AT93C46 DataIn (mbed is output)
king33jp 0:9cc1d5ebe758 76 DigitalIn _eedo; //AT93C46 DataOut(mbed is input)
king33jp 0:9cc1d5ebe758 77 };
king33jp 0:9cc1d5ebe758 78 #endif
king33jp 0:9cc1d5ebe758 79
king33jp 0:9cc1d5ebe758 80