Shivanand Gowda / EE25LC1024

128K Serial EEPROM read write erase chip erase functions SPI EEPROM Nucleo F767ZI

Dependents:   SPI_EEPROM

EE25LC1024.cpp@0:81848bf6dd4a, 2018-06-01 (annotated)

Committer:
shivanandgowdakr
Date:
Fri Jun 01 12:54:02 2018 +0000
Revision:
0:81848bf6dd4a
Child:
1:c389d5f4913d
Child:
2:156c427681f0
NUCLEO F767 SPI Serial EEPROM 25LC1024

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shivanandgowdakr 0:81848bf6dd4a 1 // EE25LC1024.cpp
shivanandgowdakr 0:81848bf6dd4a 2
shivanandgowdakr 0:81848bf6dd4a 3 #include"EE25LC1024.h"
shivanandgowdakr 0:81848bf6dd4a 4
shivanandgowdakr 0:81848bf6dd4a 5 // CONSTRUCTOR
shivanandgowdakr 0:81848bf6dd4a 6 EE25LC1024::EE25LC1024(PinName mosi, PinName miso, PinName sclk, PinName cs) : SPI(mosi, miso, sclk), _cs(cs)
shivanandgowdakr 0:81848bf6dd4a 7 {
shivanandgowdakr 0:81848bf6dd4a 8 this->format(SPI_NBIT, SPI_MODE);
shivanandgowdakr 0:81848bf6dd4a 9 this->frequency(SPI_FREQ);
shivanandgowdakr 0:81848bf6dd4a 10 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 11 }
shivanandgowdakr 0:81848bf6dd4a 12 // READING
shivanandgowdakr 0:81848bf6dd4a 13
shivanandgowdakr 0:81848bf6dd4a 14
shivanandgowdakr 0:81848bf6dd4a 15 void EE25LC1024::deepPowerDown(void)
shivanandgowdakr 0:81848bf6dd4a 16 {
shivanandgowdakr 0:81848bf6dd4a 17 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 18 this->write(DPD);
shivanandgowdakr 0:81848bf6dd4a 19 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 20 }
shivanandgowdakr 0:81848bf6dd4a 21
shivanandgowdakr 0:81848bf6dd4a 22 int EE25LC1024::ReleaseDPD_ReadSign(void)
shivanandgowdakr 0:81848bf6dd4a 23 {
shivanandgowdakr 0:81848bf6dd4a 24 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 25 this->write(RDID);
shivanandgowdakr 0:81848bf6dd4a 26 this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 27 this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 28 this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 29 int response = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 30 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 31 return response;
shivanandgowdakr 0:81848bf6dd4a 32 }
shivanandgowdakr 0:81848bf6dd4a 33
shivanandgowdakr 0:81848bf6dd4a 34
shivanandgowdakr 0:81848bf6dd4a 35 int EE25LC1024::readByte(int addr)
shivanandgowdakr 0:81848bf6dd4a 36 {
shivanandgowdakr 0:81848bf6dd4a 37 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 38 this->write(READ);
shivanandgowdakr 0:81848bf6dd4a 39 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 40 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 41 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 42 int response = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 43 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 44 return response;
shivanandgowdakr 0:81848bf6dd4a 45 }
shivanandgowdakr 0:81848bf6dd4a 46
shivanandgowdakr 0:81848bf6dd4a 47 void EE25LC1024::readStream(int addr, char* buf, int count)
shivanandgowdakr 0:81848bf6dd4a 48 {
shivanandgowdakr 0:81848bf6dd4a 49 if (count < 1)
shivanandgowdakr 0:81848bf6dd4a 50 return;
shivanandgowdakr 0:81848bf6dd4a 51 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 52 this->write(READ);
shivanandgowdakr 0:81848bf6dd4a 53 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 54 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 55 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 56 for (int i = 0; i < count; i++) {
shivanandgowdakr 0:81848bf6dd4a 57 buf[i] = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 58 printf("i= %d :%c \r\n",i,buf[i]);
shivanandgowdakr 0:81848bf6dd4a 59 }
shivanandgowdakr 0:81848bf6dd4a 60 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 61 }
shivanandgowdakr 0:81848bf6dd4a 62
shivanandgowdakr 0:81848bf6dd4a 63 // WRITING
shivanandgowdakr 0:81848bf6dd4a 64 void EE25LC1024::writeByte(int addr, int data)
shivanandgowdakr 0:81848bf6dd4a 65 {
shivanandgowdakr 0:81848bf6dd4a 66 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 67 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 68 this->write(WRITE);
shivanandgowdakr 0:81848bf6dd4a 69 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 70 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 71 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 72 this->write(data);
shivanandgowdakr 0:81848bf6dd4a 73 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 74 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 75 wait_ms(6);
shivanandgowdakr 0:81848bf6dd4a 76 // wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 77 }
shivanandgowdakr 0:81848bf6dd4a 78
shivanandgowdakr 0:81848bf6dd4a 79 void EE25LC1024::writeStream(int addr, char* buf, int count)
shivanandgowdakr 0:81848bf6dd4a 80 {
shivanandgowdakr 0:81848bf6dd4a 81 if (count < 1)
shivanandgowdakr 0:81848bf6dd4a 82 return;
shivanandgowdakr 0:81848bf6dd4a 83 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 84 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 85 this->write(WRITE);
shivanandgowdakr 0:81848bf6dd4a 86 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 87 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 88 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 89 for (int i = 0; i < count; i++) {
shivanandgowdakr 0:81848bf6dd4a 90 this->write(buf[i]);
shivanandgowdakr 0:81848bf6dd4a 91 }
shivanandgowdakr 0:81848bf6dd4a 92 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 93 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 94 wait_ms(6);
shivanandgowdakr 0:81848bf6dd4a 95 }
shivanandgowdakr 0:81848bf6dd4a 96
shivanandgowdakr 0:81848bf6dd4a 97 void EE25LC1024::writeString(int addr, string str)
shivanandgowdakr 0:81848bf6dd4a 98 {
shivanandgowdakr 0:81848bf6dd4a 99 if (str.length() < 1)
shivanandgowdakr 0:81848bf6dd4a 100 return;
shivanandgowdakr 0:81848bf6dd4a 101 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 102 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 103 this->write(WRITE);
shivanandgowdakr 0:81848bf6dd4a 104 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 105 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 106 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 107 for (int i = 0; i < str.length(); i++)
shivanandgowdakr 0:81848bf6dd4a 108 this->write(str.at(i));
shivanandgowdakr 0:81848bf6dd4a 109 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 110 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 111 wait_ms(6);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 112 }
shivanandgowdakr 0:81848bf6dd4a 113
shivanandgowdakr 0:81848bf6dd4a 114
shivanandgowdakr 0:81848bf6dd4a 115
shivanandgowdakr 0:81848bf6dd4a 116 uint8_t EE25LC1024::readRegister()
shivanandgowdakr 0:81848bf6dd4a 117 {
shivanandgowdakr 0:81848bf6dd4a 118
shivanandgowdakr 0:81848bf6dd4a 119 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 120 this->write(RDSR);
shivanandgowdakr 0:81848bf6dd4a 121 uint8_t val=this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 122 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 123 //wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 124 //printf("value of reg is %X \r\n",val);
shivanandgowdakr 0:81848bf6dd4a 125 return(val);
shivanandgowdakr 0:81848bf6dd4a 126 }
shivanandgowdakr 0:81848bf6dd4a 127 //ERASING
shivanandgowdakr 0:81848bf6dd4a 128 void EE25LC1024::chipErase()
shivanandgowdakr 0:81848bf6dd4a 129 {
shivanandgowdakr 0:81848bf6dd4a 130 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 131 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 132 this->write(CE);
shivanandgowdakr 0:81848bf6dd4a 133 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 134 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 135 wait_ms(10);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 136 }
shivanandgowdakr 0:81848bf6dd4a 137
shivanandgowdakr 0:81848bf6dd4a 138
shivanandgowdakr 0:81848bf6dd4a 139 void EE25LC1024::sectorErase(int addr)
shivanandgowdakr 0:81848bf6dd4a 140 {
shivanandgowdakr 0:81848bf6dd4a 141 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 142 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 143 this->write(SE);
shivanandgowdakr 0:81848bf6dd4a 144 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 145 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 146 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 147 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 148 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 149 wait_ms(10);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 150 }
shivanandgowdakr 0:81848bf6dd4a 151
shivanandgowdakr 0:81848bf6dd4a 152 void EE25LC1024::pageErase(int addr)
shivanandgowdakr 0:81848bf6dd4a 153 {
shivanandgowdakr 0:81848bf6dd4a 154
shivanandgowdakr 0:81848bf6dd4a 155 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 156 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 157 this->write(SE);
shivanandgowdakr 0:81848bf6dd4a 158 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 159 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 160 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 161 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 162 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 163 wait_ms(6);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 164
shivanandgowdakr 0:81848bf6dd4a 165
shivanandgowdakr 0:81848bf6dd4a 166 }
shivanandgowdakr 0:81848bf6dd4a 167
shivanandgowdakr 0:81848bf6dd4a 168
shivanandgowdakr 0:81848bf6dd4a 169 uint8_t EE25LC1024::checkIfBusy()
shivanandgowdakr 0:81848bf6dd4a 170 {
shivanandgowdakr 0:81848bf6dd4a 171 uint8_t value=readRegister();
shivanandgowdakr 0:81848bf6dd4a 172 printf("Value of Status Reg=%X\r\n\r\n",value);
shivanandgowdakr 0:81848bf6dd4a 173 if((value&0x01)==0x01)
shivanandgowdakr 0:81848bf6dd4a 174 return 1;
shivanandgowdakr 0:81848bf6dd4a 175 else
shivanandgowdakr 0:81848bf6dd4a 176 return 0;
shivanandgowdakr 0:81848bf6dd4a 177 }
shivanandgowdakr 0:81848bf6dd4a 178
shivanandgowdakr 0:81848bf6dd4a 179 void EE25LC1024::writeRegister(uint8_t regValue)
shivanandgowdakr 0:81848bf6dd4a 180 {
shivanandgowdakr 0:81848bf6dd4a 181 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 182 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 183 this->write(WRSR);
shivanandgowdakr 0:81848bf6dd4a 184 this->write(regValue);
shivanandgowdakr 0:81848bf6dd4a 185 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 186 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 187 wait(WAIT_TIME);//instead of wait poll for WIP flag of status reg or use checkIfBusy() function...see main for more dtails
shivanandgowdakr 0:81848bf6dd4a 188
shivanandgowdakr 0:81848bf6dd4a 189 }
shivanandgowdakr 0:81848bf6dd4a 190
shivanandgowdakr 0:81848bf6dd4a 191
shivanandgowdakr 0:81848bf6dd4a 192 void EE25LC1024::writeLong(int addr, long value)
shivanandgowdakr 0:81848bf6dd4a 193 {
shivanandgowdakr 0:81848bf6dd4a 194 //Decomposition from a long to 4 bytes by using bitshift.
shivanandgowdakr 0:81848bf6dd4a 195 //One = Most significant -> Four = Least significant byte
shivanandgowdakr 0:81848bf6dd4a 196 uint8_t four = (value & 0xFF);
shivanandgowdakr 0:81848bf6dd4a 197 uint8_t three = ((value >> 8) & 0xFF);
shivanandgowdakr 0:81848bf6dd4a 198 uint8_t two = ((value >> 16) & 0xFF);
shivanandgowdakr 0:81848bf6dd4a 199 uint8_t one = ((value >> 24) & 0xFF);
shivanandgowdakr 0:81848bf6dd4a 200
shivanandgowdakr 0:81848bf6dd4a 201 writeEnable();
shivanandgowdakr 0:81848bf6dd4a 202 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 203 this->write(WRITE);
shivanandgowdakr 0:81848bf6dd4a 204 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 205 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 206 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 207 this->write(four);
shivanandgowdakr 0:81848bf6dd4a 208 this->write(three);
shivanandgowdakr 0:81848bf6dd4a 209 this->write(two);
shivanandgowdakr 0:81848bf6dd4a 210 this->write(one);
shivanandgowdakr 0:81848bf6dd4a 211 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 212 writeDisable();
shivanandgowdakr 0:81848bf6dd4a 213 wait_ms(6);
shivanandgowdakr 0:81848bf6dd4a 214 }
shivanandgowdakr 0:81848bf6dd4a 215
shivanandgowdakr 0:81848bf6dd4a 216 long EE25LC1024::raedLong(int addr)
shivanandgowdakr 0:81848bf6dd4a 217 {
shivanandgowdakr 0:81848bf6dd4a 218 //Read the 4 bytes from the eeprom memory.
shivanandgowdakr 0:81848bf6dd4a 219 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 220 this->write(READ);
shivanandgowdakr 0:81848bf6dd4a 221 this->write((addr & ADDR_BMASK2) >> ADDR_BSHIFT2);
shivanandgowdakr 0:81848bf6dd4a 222 this->write((addr & ADDR_BMASK1) >> ADDR_BSHIFT1);
shivanandgowdakr 0:81848bf6dd4a 223 this->write((addr & ADDR_BMASK0) >> ADDR_BSHIFT0);
shivanandgowdakr 0:81848bf6dd4a 224
shivanandgowdakr 0:81848bf6dd4a 225 long four = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 226 long three = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 227 long two = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 228 long one = this->write(DUMMY_ADDR);
shivanandgowdakr 0:81848bf6dd4a 229 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 230 //Return the recomposed long by using bitshift.
shivanandgowdakr 0:81848bf6dd4a 231 return ((four << 0) & 0xFF) + ((three << 8) & 0xFFFF) + ((two << 16) & 0xFFFFFF) + ((one << 24) & 0xFFFFFFFF);
shivanandgowdakr 0:81848bf6dd4a 232
shivanandgowdakr 0:81848bf6dd4a 233 }
shivanandgowdakr 0:81848bf6dd4a 234
shivanandgowdakr 0:81848bf6dd4a 235
shivanandgowdakr 0:81848bf6dd4a 236 //ENABLE/DISABLE (private functions)
shivanandgowdakr 0:81848bf6dd4a 237 void EE25LC1024::writeEnable()
shivanandgowdakr 0:81848bf6dd4a 238 {
shivanandgowdakr 0:81848bf6dd4a 239 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 240 this->write(WREN);
shivanandgowdakr 0:81848bf6dd4a 241 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 242 }
shivanandgowdakr 0:81848bf6dd4a 243 void EE25LC1024::writeDisable()
shivanandgowdakr 0:81848bf6dd4a 244 {
shivanandgowdakr 0:81848bf6dd4a 245 chipEnable();
shivanandgowdakr 0:81848bf6dd4a 246 this->write(WRDI);
shivanandgowdakr 0:81848bf6dd4a 247 chipDisable();
shivanandgowdakr 0:81848bf6dd4a 248 }
shivanandgowdakr 0:81848bf6dd4a 249 void EE25LC1024::chipEnable()
shivanandgowdakr 0:81848bf6dd4a 250 {
shivanandgowdakr 0:81848bf6dd4a 251 _cs = 0;
shivanandgowdakr 0:81848bf6dd4a 252 }
shivanandgowdakr 0:81848bf6dd4a 253 void EE25LC1024::chipDisable()
shivanandgowdakr 0:81848bf6dd4a 254 {
shivanandgowdakr 0:81848bf6dd4a 255 _cs = 1;
shivanandgowdakr 0:81848bf6dd4a 256 }
shivanandgowdakr 0:81848bf6dd4a 257