116 lines
3.1 KiB
Plaintext
116 lines
3.1 KiB
Plaintext
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/*
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EEPROM1024.pde
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AT24C1024 EEPROM Benchmark Sketch
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Our project page is here:
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http://www.arduino.cc/playground/Code/I2CEEPROM24C1024
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From the datasheet:
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The AT24C1024B provides 1,048,576 bits of serial electrically
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erasable and programmable read only memory (EEPROM) organized
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as 131,072 words of 8 bits each. The device’s cascadable
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feature allows up to four devices to share a common two-wire
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bus.
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http://www.atmel.com/dyn/resources/prod_documents/doc5194.pdf
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*/
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#include <WProgram.h>
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#include <Wire.h>
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#include <E24C1024.h>
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unsigned long time;
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unsigned long finishTime;
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unsigned long errors = 0;
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unsigned long address = 0;
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byte loop_size;
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// Set to a higher number if you want to start at a higher address.
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#define MIN_ADDRESS 0
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// Upper boundary of the address space. Choose one.
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#define MAX_ADDRESS 131072 // 1 device
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//#define MAX_ADDRESS 262144 // 2 devices
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//#define MAX_ADDRESS 393216 // 3 devices
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//#define MAX_ADDRESS 524288 // 4 devices
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void setup()
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{
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// Make sure we aren't reading old data
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randomSeed(analogRead(0));
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loop_size = random(1, 100);
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Serial.begin(9600);
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Serial.println();
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Serial.println("E24C1024 Library Benchmark Sketch");
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Serial.println();
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writeByByteTest();
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readByByteTest();
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}
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void loop()
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{
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}
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void writeByByteTest()
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{
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time = millis();
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errors = 0;
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Serial.println("--------------------------------");
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Serial.println("Write By Byte Test:");
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Serial.println();
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Serial.print("Writing data:");
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for (address = MIN_ADDRESS; address < MAX_ADDRESS; address++)
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{
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EEPROM1024.write(address, (uint8_t)(address % loop_size));
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if (!(address % 5000)) Serial.print(".");
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}
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finishTime = millis() - time;
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Serial.println("DONE");
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Serial.print("Total Time (seconds): ");
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Serial.println((unsigned long)(finishTime / 1000));
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Serial.print("Write operations per second: ");
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Serial.println((unsigned long)(MAX_ADDRESS / (finishTime / 1000)));
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Serial.println("--------------------------------");
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Serial.println();
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}
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void readByByteTest()
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{
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time = millis();
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errors = 0;
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Serial.println("--------------------------------");
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Serial.println("Read By Byte Test:");
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Serial.println();
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Serial.print("Reading data:");
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for (address = MIN_ADDRESS; address < MAX_ADDRESS; address++)
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{
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uint8_t data;
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data = EEPROM1024.read(address);
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if (data != (uint8_t)(address % loop_size))
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{
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Serial.println();
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Serial.print("Address: ");
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Serial.print(address);
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Serial.print(" Should be: ");
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Serial.print((uint8_t)(address % loop_size), DEC);
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Serial.print(" Read val: ");
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Serial.println(data, DEC);
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errors++;
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}
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if (!(address % 5000)) Serial.print(".");
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}
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finishTime = millis() - time;
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Serial.println("DONE");
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Serial.println();
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Serial.print("Total Test Time (secs): ");
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Serial.println((unsigned long)(finishTime / 1000));
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Serial.print("Read operations per second: ");
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Serial.println((unsigned long)(MAX_ADDRESS / (finishTime / 1000)));
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Serial.print("Total errors: ");
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Serial.println(errors);
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Serial.println("--------------------------------");
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Serial.println();
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}
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