Kai Liu / _24LCXXX

I2C EEPROM 24LCXXX Driver

Dependents:   LPC1114_EBadge

Fork of _24LCXXX by Hiroshi M

_24LCXXX.cpp@1:6535ae170a0c, 2014-06-09 (annotated)

Committer:
allankliu
Date:
Mon Jun 09 11:00:20 2014 +0000
Revision:
1:6535ae170a0c
Parent:
0:859387a87312 
Change eeprom to _24LCXXX libs, with software SPI bus and other changes.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bant62 0:859387a87312 1 /**
bant62 0:859387a87312 2 *****************************************************************************
bant62 0:859387a87312 3 * File Name : _24LCXXX.cpp
bant62 0:859387a87312 4 *
bant62 0:859387a87312 5 * Title : I2C EEPROM 24LCXXX Claass Source File
bant62 0:859387a87312 6 * Revision : 0.1
bant62 0:859387a87312 7 * Notes :
bant62 0:859387a87312 8 * Target Board : mbed NXP LPC1768, mbed LPC1114FN28 etc
bant62 0:859387a87312 9 * Tool Chain : ????
bant62 0:859387a87312 10 *
bant62 0:859387a87312 11 * Revision History:
bant62 0:859387a87312 12 * When Who Description of change
bant62 0:859387a87312 13 * ----------- ----------- -----------------------
bant62 0:859387a87312 14 * 2012/12/06 Hiroshi M init
bant62 0:859387a87312 15 *****************************************************************************
bant62 0:859387a87312 16 *
bant62 0:859387a87312 17 * Copyright (C) 2013 Hiroshi M, MIT License
bant62 0:859387a87312 18 *
bant62 0:859387a87312 19 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
bant62 0:859387a87312 20 * and associated documentation files (the "Software"), to deal in the Software without restriction,
bant62 0:859387a87312 21 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
bant62 0:859387a87312 22 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
bant62 0:859387a87312 23 * furnished to do so, subject to the following conditions:
bant62 0:859387a87312 24 *
bant62 0:859387a87312 25 * The above copyright notice and this permission notice shall be included in all copies or
bant62 0:859387a87312 26 * substantial portions of the Software.
bant62 0:859387a87312 27 *
bant62 0:859387a87312 28 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
bant62 0:859387a87312 29 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
bant62 0:859387a87312 30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
bant62 0:859387a87312 31 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
bant62 0:859387a87312 32 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
bant62 0:859387a87312 33 *
bant62 0:859387a87312 34 **/
bant62 0:859387a87312 35
bant62 0:859387a87312 36 /* Includes ----------------------------------------------------------------- */
bant62 0:859387a87312 37 #include "_24LCXXX.h"
bant62 0:859387a87312 38 #include "mbed.h"
bant62 0:859387a87312 39
bant62 0:859387a87312 40 /* Private typedef ---------------------------------------------------------- */
bant62 0:859387a87312 41 /* Private define ----------------------------------------------------------- */
bant62 0:859387a87312 42 /* Private macro ------------------------------------------------------------ */
bant62 0:859387a87312 43 /* Private variables -------------------------------------------------------- */
bant62 0:859387a87312 44
bant62 0:859387a87312 45 /* member fanctions --------------------------------------------------------- */
bant62 0:859387a87312 46
bant62 0:859387a87312 47 // Constractor
bant62 0:859387a87312 48 _24LCXXX::_24LCXXX(I2C *i2c, const int address):
bant62 0:859387a87312 49 _i2c_address(address<<1), _i2c(i2c), _pc(NULL), _debug(false)
bant62 0:859387a87312 50 {
bant62 0:859387a87312 51 }
bant62 0:859387a87312 52
bant62 0:859387a87312 53 _24LCXXX::_24LCXXX(I2C *i2c, Serial *pc, const int address):
bant62 0:859387a87312 54 _i2c_address(address<<1), _i2c(i2c), _pc(pc), _debug(true)
bant62 0:859387a87312 55 {
bant62 0:859387a87312 56 }
bant62 0:859387a87312 57
bant62 0:859387a87312 58 int _24LCXXX::byte_write( int mem_addr, char data )
bant62 0:859387a87312 59 {
bant62 0:859387a87312 60 int res;
bant62 0:859387a87312 61 char buf[3];
bant62 0:859387a87312 62
bant62 0:859387a87312 63 buf[0] = (0xff00 & mem_addr)>>8; // Write Address High byte set
bant62 0:859387a87312 64 buf[1] = (0x00ff & mem_addr); // Write Address Low byte set
bant62 0:859387a87312 65 buf[2] = data;
bant62 0:859387a87312 66
bant62 0:859387a87312 67 res = _i2c->write(_i2c_address, buf, sizeof(buf), false);
bant62 0:859387a87312 68 if(_debug)
bant62 0:859387a87312 69 {
bant62 0:859387a87312 70 if(res==0)
bant62 0:859387a87312 71 {
bant62 0:859387a87312 72 _pc->printf("Success! Byte Data Write. \n");
bant62 0:859387a87312 73 }
bant62 0:859387a87312 74 else
bant62 0:859387a87312 75 {
bant62 0:859387a87312 76 _pc->printf("Failed! Byte Data Write %d.\n", res);
bant62 0:859387a87312 77 }
bant62 0:859387a87312 78 }
bant62 0:859387a87312 79
bant62 0:859387a87312 80 wait_ms(5); // 5mS
bant62 0:859387a87312 81
bant62 0:859387a87312 82 return res;
bant62 0:859387a87312 83 }
bant62 0:859387a87312 84
bant62 0:859387a87312 85 int _24LCXXX::nbyte_write( int mem_addr, void *data, int size )
bant62 0:859387a87312 86 {
bant62 0:859387a87312 87 int i;
bant62 0:859387a87312 88 int res;
bant62 0:859387a87312 89 char buf[3];
bant62 0:859387a87312 90 char *p;
bant62 0:859387a87312 91
bant62 0:859387a87312 92 p = (char *)data;
bant62 0:859387a87312 93 res = -1;
bant62 0:859387a87312 94 for ( i = 0; i < size; i++ )
bant62 0:859387a87312 95 {
bant62 0:859387a87312 96 buf[0] = (0xff00 & mem_addr)>>8; // Read Address High byte set
bant62 0:859387a87312 97 buf[1] = (0x00ff & mem_addr); // Read Address Low byte set
bant62 0:859387a87312 98 buf[2] = *p++;
bant62 0:859387a87312 99
bant62 0:859387a87312 100 res = _i2c->write(_i2c_address, buf, sizeof(buf), false);
bant62 0:859387a87312 101 if(_debug)
bant62 0:859387a87312 102 {
bant62 0:859387a87312 103 if(res==0)
bant62 0:859387a87312 104 {
bant62 0:859387a87312 105 _pc->printf("Success! N-Byte Data Write. \n");
bant62 0:859387a87312 106 }
bant62 0:859387a87312 107 else
bant62 0:859387a87312 108 {
bant62 0:859387a87312 109 _pc->printf("Failed! N-Byte Data Write %d.\n", res);
bant62 0:859387a87312 110 }
bant62 0:859387a87312 111 }
bant62 0:859387a87312 112
bant62 0:859387a87312 113 if(res!=0)
bant62 0:859387a87312 114 {
bant62 0:859387a87312 115 return res;
bant62 0:859387a87312 116 }
bant62 0:859387a87312 117
bant62 0:859387a87312 118 wait_ms(5); // 5mS
bant62 0:859387a87312 119
bant62 0:859387a87312 120 if( ++mem_addr >= MAXADR_24LCXXX ) // Address counter +1
bant62 0:859387a87312 121 {
bant62 0:859387a87312 122 return -1; // Address range over
bant62 0:859387a87312 123 }
bant62 0:859387a87312 124 }
bant62 0:859387a87312 125
bant62 0:859387a87312 126 return res;
bant62 0:859387a87312 127 }
bant62 0:859387a87312 128
bant62 0:859387a87312 129 int _24LCXXX::page_write( int mem_addr, char *data )
bant62 0:859387a87312 130 {
bant62 0:859387a87312 131 int i;
bant62 0:859387a87312 132 int res;
bant62 0:859387a87312 133 char buf[PAGE_SIZE_24LCXXX+2];
bant62 0:859387a87312 134
bant62 0:859387a87312 135 buf[0] = (0xff00 & mem_addr)>>8; // Write Address High byte set
bant62 0:859387a87312 136 buf[1] = (0x00ff & mem_addr); // Write Address Low byte set
bant62 0:859387a87312 137
bant62 0:859387a87312 138 for (i=0; i<PAGE_SIZE_24LCXXX; i++)
bant62 0:859387a87312 139 {
bant62 0:859387a87312 140 buf[i+2] = data[i];
bant62 0:859387a87312 141 }
bant62 0:859387a87312 142 res = _i2c->write(_i2c_address, buf, sizeof(buf), false);
bant62 0:859387a87312 143 if(_debug)
bant62 0:859387a87312 144 {
bant62 0:859387a87312 145 if(res==0)
bant62 0:859387a87312 146 {
bant62 0:859387a87312 147 _pc->printf("Success! Page Data Write. \n");
bant62 0:859387a87312 148 }
bant62 0:859387a87312 149 else
bant62 0:859387a87312 150 {
bant62 0:859387a87312 151 _pc->printf("Failed! Page Data Write %d.\n", res);
bant62 0:859387a87312 152 }
bant62 0:859387a87312 153 }
bant62 0:859387a87312 154
bant62 0:859387a87312 155 return res;
bant62 0:859387a87312 156 }
bant62 0:859387a87312 157
bant62 0:859387a87312 158
bant62 0:859387a87312 159 int _24LCXXX::nbyte_read( int mem_addr, void *data, int size )
bant62 0:859387a87312 160 {
bant62 0:859387a87312 161 int res;
bant62 0:859387a87312 162 char buf[2];
bant62 0:859387a87312 163
bant62 0:859387a87312 164 buf[0] = (0xff00 & mem_addr)>>8; // Read Address High byte set
bant62 0:859387a87312 165 buf[1] = (0x00ff & mem_addr); // Read Address Low byte set
bant62 0:859387a87312 166
bant62 0:859387a87312 167 res = _i2c->write(_i2c_address, buf, sizeof(buf), true);
bant62 0:859387a87312 168 if(_debug)
bant62 0:859387a87312 169 {
bant62 0:859387a87312 170 if(res==0)
bant62 0:859387a87312 171 {
bant62 0:859387a87312 172 _pc->printf("Success! nbyte read address send. \n");
bant62 0:859387a87312 173 }
bant62 0:859387a87312 174 else
bant62 0:859387a87312 175 {
bant62 0:859387a87312 176 _pc->printf("Failed! nbyte read address send %d.\n", res);
bant62 0:859387a87312 177 }
bant62 0:859387a87312 178 }
bant62 0:859387a87312 179
bant62 0:859387a87312 180 //
bant62 0:859387a87312 181 res = _i2c->read(_i2c_address, (char *)data, size, false);
bant62 0:859387a87312 182 if(_debug)
bant62 0:859387a87312 183 {
bant62 0:859387a87312 184 if(res==0)
bant62 0:859387a87312 185 {
bant62 0:859387a87312 186 _pc->printf("Success! nbyte read address send. \n");
bant62 0:859387a87312 187 }
bant62 0:859387a87312 188 else
bant62 0:859387a87312 189 {
bant62 0:859387a87312 190 _pc->printf("Failed! nbyte read address send %d.\n", res);
bant62 0:859387a87312 191 }
bant62 0:859387a87312 192 }
bant62 0:859387a87312 193
bant62 0:859387a87312 194 return res;
bant62 0:859387a87312 195 }