//Test extEEPROM library.
//Writes the EEPROM full of 32-bit integers and reads them back to verify.
//Wire a button from digital pin 6 to ground, this is used as a start button
//so the sketch doesn't do unnecessary EEPROM writes every time it's reset.
//Jack Christensen 09Jul2014
//Paolo Paolucci 17Mar2016 (fix 28Jun2017)
//Mik 03Jan2017 (configured Library to use the Wire1 as I2C channel)
#include <extEEPROM.h> //https://github.com/PaoloP74/extEEPROM
//One 24LC256 EEPROMs on the bus
const uint32_t totalKBytes = 32; //for read and write test functions
extEEPROM eep(kbits_256, 1, 64, 0x57); //device size, number of devices, page size
const uint8_t btnStart = 6; //start button
void setup(void)
{
uint8_t eepStatus;
pinMode(btnStart, INPUT_PULLUP);
Serial.begin(115200);
while (!SerialUSB) {}
bool channelInsert = false;
Serial.println(F("Select the number of Wire channel use the eeprom"));
Serial.println(F("0 = Wire"));
Serial.println(F("1 = Wire1"));
Serial.println(F("...."));
Serial.println(F("x = WIRE_INTERFACES_COUNT"));
do {
if (Serial.available()) {
char I2Cchannel = Serial.read();
// only number that are less than WIRE_INTERFACES_COUNT are allowed
if ((I2Cchannel > '0') && (I2Cchannel < ('0' + WIRE_INTERFACES_COUNT))) {
channelInsert = true;
}
switch ((I2Cchannel - '0')) {
case 0:
Serial.println(F("Using the default Wire interface"));
eepStatus = eep.begin(eep.twiClock400kHz); //go fast!
break;
case 1:
Serial.println(F("Using the Wire1 interface"));
eepStatus = eep.begin(eep.twiClock400kHz, &Wire1); //go fast!
break;
/*
Uncomment till the number of WIRE_INTERFACES_COUNT of your Arduino board
case 2:
Serial.println(F("Using the Wire2 interface"));
eepStatus = eep.begin(eep.twiClock400kHz, &Wire2); //go fast!
break;
case 3:
Serial.println(F("Using the Wire3 interface"));
eepStatus = eep.begin(eep.twiClock400kHz, &Wire3); //go fast!
break;
case 4:
Serial.println(F("Using the Wire4 interface"));
eepStatus = eep.begin(eep.twiClock400kHz, &Wire4); //go fast!
break;
case 5:
Serial.println(F("Using the Wire5 interface"));
eepStatus = eep.begin(eep.twiClock400kHz, &Wire5); //go fast!
break;*/
default:
Serial.println(F("A wrong channel has been inserted (Arduino manage max 5)"));
break;
}
}
} while (!channelInsert);
if (eepStatus) {
Serial.print(F("extEEPROM.begin() failed, status = "));
Serial.println(eepStatus);
while (1);
}
Serial.println(F("Started !!"));
uint8_t chunkSize =
64; //this can be changed, but must be a multiple of 4 since we're writing 32-bit integers
// eeErase(chunkSize, 0, totalKBytes * 1024 - 1);
eeWrite(chunkSize);
eeRead(chunkSize);
dump(0, 32); //the first 32 bytes
dump(32256, 64); //the last 64 bytes
//dump(32512, 64); //across the device boundary
//dump(65520, 16); //the last 16 bytes
}
void loop(void)
{
}
//write test data (32-bit integers) to eeprom, "chunk" bytes at a time
void eeWrite(uint8_t chunk)
{
chunk &= 0xFC; //force chunk to be a multiple of 4
uint8_t data[chunk];
uint32_t val = 0;
Serial.println(F("Writing..."));
uint32_t msStart = millis();
for (uint32_t addr = 0; addr < totalKBytes * 1024; addr += chunk) {
if ( (addr & 0xFFF) == 0 ) {
Serial.println(addr);
}
for (uint8_t c = 0; c < chunk; c += 4) {
data[c + 0] = val >> 24;
data[c + 1] = val >> 16;
data[c + 2] = val >> 8;
data[c + 3] = val;
++val;
}
eep.write(addr, data, chunk);
}
uint32_t msLapse = millis() - msStart;
Serial.print(F("Write lapse: "));
Serial.print(msLapse);
Serial.println(F(" ms"));
}
//read test data (32-bit integers) from eeprom, "chunk" bytes at a time
void eeRead(uint8_t chunk)
{
chunk &= 0xFC; //force chunk to be a multiple of 4
uint8_t data[chunk];
uint32_t val = 0, testVal;
Serial.println(F("Reading..."));
uint32_t msStart = millis();
for (uint32_t addr = 0; addr < totalKBytes * 1024; addr += chunk) {
if ( (addr & 0xFFF) == 0 ) {
Serial.println(addr);
}
eep.read(addr, data, chunk);
for (uint8_t c = 0; c < chunk; c += 4) {
testVal = ((uint32_t)data[c + 0] << 24) + ((uint32_t)data[c + 1] << 16) + ((
uint32_t)data[c + 2] << 8) + (uint32_t)data[c + 3];
if (testVal != val) {
Serial.print(F("Error @ addr "));
Serial.print(addr + c);
Serial.print(F(" Expected "));
Serial.print(val);
Serial.print(F(" Read "));
Serial.print(testVal);
Serial.print(F(" 0x"));
Serial.println(testVal, HEX);
}
++val;
}
}
uint32_t msLapse = millis() - msStart;
Serial.print(F("Last value: "));
Serial.print(val);
Serial.print(F(" Read lapse: "));
Serial.print(msLapse);
Serial.println(F(" ms"));
}
//write 0xFF to eeprom, "chunk" bytes at a time
void eeErase(uint8_t chunk, uint32_t startAddr, uint32_t endAddr)
{
chunk &= 0xFC; //force chunk to be a multiple of 4
uint8_t data[chunk];
Serial.println(F("Erasing..."));
for (int i = 0; i < chunk; i++) {
data[i] = 0xFF;
}
uint32_t msStart = millis();
for (uint32_t a = startAddr; a <= endAddr; a += chunk) {
if ( (a & 0xFFF) == 0 ) {
Serial.println(a);
}
eep.write(a, data, chunk);
}
uint32_t msLapse = millis() - msStart;
Serial.print(F("Erase lapse: "));
Serial.print(msLapse);
Serial.print(F(" ms"));
}
//dump eeprom contents, 16 bytes at a time.
//always dumps a multiple of 16 bytes.
void dump(uint32_t startAddr, uint32_t nBytes)
{
Serial.print(F("EEPROM DUMP 0x"));
Serial.print(startAddr, HEX);
Serial.print(F(" 0x"));
Serial.print(nBytes, HEX);
Serial.print(F(" "));
Serial.print(startAddr);
Serial.print(F(" "));
Serial.println(nBytes);
uint32_t nRows = (nBytes + 15) >> 4;
uint8_t d[16];
for (uint32_t r = 0; r < nRows; r++) {
uint32_t a = startAddr + 16 * r;
eep.read(a, d, 16);
Serial.print(F("0x"));
if ( a < 16 * 16 * 16 ) {
Serial.print(F("0"));
}
if ( a < 16 * 16 ) {
Serial.print(F("0"));
}
if ( a < 16 ) {
Serial.print(F("0"));
}
Serial.print(a, HEX);
Serial.print(F(" "));
for ( int c = 0; c < 16; c++ ) {
if ( d[c] < 16 ) {
Serial.print(F("0"));
Serial.print(d[c], HEX);
Serial.print( c == 7 ? " " : " ");
}
}
Serial.println(F(""));
}
}