Updated to work on Arduino Due.

Author: odbol

libraries/I2C_EEPROM/I2C_eeprom.cpp

@@ -35,10 +35,14 @@ void I2C_eeprom::begin()
 {
  Wire.begin();
  _lastWrite = 0;
+
+// TWBR is not available on Arduino Due
+#ifdef TWBR 
  TWBR = 72;
  // 0=1000 1=888 2=800 8=500
  // 12=400KHz 24=250 32=200 72=100 152=50
  // F_CPU/16+(2*TWBR) // TWBR is a uint8_t
+#endif 
 }
 
 int I2C_eeprom::writeByte(uint16_t address, uint8_t data)

libraries/I2C_EEPROM/examples/I2C_eeprom_test/I2C_eeprom_test.ino

@@ -8,6 +8,9 @@
 #include <Wire.h> //I2C library
 #include <I2C_eeprom.h>
 
+
+#define SERIAL_OUT SerialUSB
+
 I2C_eeprom ee(0x50);
 
 uint32_t totals = 0;
@@ -16,159 +19,163 @@ void setup()
 {
  ee.begin();
 
- Serial.begin(115200);
- Serial.print("Demo I2C eeprom library ");
- Serial.print(I2C_EEPROM_VERSION);
- Serial.println("\n");
+ SERIAL_OUT.begin(57600); 
+ while (!SERIAL_OUT) {
+ ; // wait for SERIAL_OUT port to connect. Needed for Leonardo only
+ }
+ 
+ SERIAL_OUT.print("Demo I2C eeprom library ");
+ SERIAL_OUT.print(I2C_EEPROM_VERSION);
+ SERIAL_OUT.println("\n");
 
- Serial.println("\nTEST: 64 byte page boundary writeBlock");
+ SERIAL_OUT.println("\nTEST: 64 byte page boundary writeBlock");
  ee.setBlock(0,0,128);
  dumpEEPROM(0, 128);
  char data[] = "11111111111111111111";
  ee.writeBlock(60, (uint8_t*) data, 10);
  dumpEEPROM(0, 128);
 
 
- Serial.println("\nTEST: 64 byte page boundary setBlock");
+ SERIAL_OUT.println("\nTEST: 64 byte page boundary setBlock");
  ee.setBlock(0,0,128);
  dumpEEPROM(0, 128);
  ee.setBlock(60, '1', 10);
  dumpEEPROM(0, 128);
 
 
- Serial.println("\nTEST: 64 byte page boundary readBlock");
+ SERIAL_OUT.println("\nTEST: 64 byte page boundary readBlock");
  ee.setBlock(0,0,128);
  ee.setBlock(60, '1', 6);
  dumpEEPROM(0, 128);
  char ar[100];
  memset(ar,0,100);
  ee.readBlock(60, (uint8_t*)ar, 10);
- Serial.println(ar);
+ SERIAL_OUT.println(ar);
 
 
- Serial.println("\nTEST: write large string readback in small steps");
+ SERIAL_OUT.println("\nTEST: write large string readback in small steps");
  ee.setBlock(0,0,128);
  char data2[] = "0000000000111111111122222222223333333333444444444455555555556666666666777777777788888888889999999999A"; 
  ee.writeBlock(10, (uint8_t *) &data2, 100);
  dumpEEPROM(0, 128);
  for (int i = 0; i<100; i++)
  {
- if (i%10 == 0 ) Serial.println();
- Serial.print(' ');
- Serial.print(ee.readByte(10+i));
+ if (i%10 == 0 ) SERIAL_OUT.println();
+ SERIAL_OUT.print(' ');
+ SERIAL_OUT.print(ee.readByte(10+i));
  }
- Serial.println();
+ SERIAL_OUT.println();
 
 
- Serial.println("\nTEST: check almost endofPage writeBlock");
+ SERIAL_OUT.println("\nTEST: check almost endofPage writeBlock");
  ee.setBlock(0,0,128);
  char data3[] = "6666"; 
  ee.writeBlock(60, (uint8_t *) &data3, 2);
  dumpEEPROM(0, 128);
 
- Serial.println();
- Serial.print("\nI2C speed:\t");
- Serial.println(16000/(16+2*TWBR));
- Serial.print("TWBR:\t");
- Serial.println(TWBR);
- Serial.println();
+ // SERIAL_OUT.println();
+ // SERIAL_OUT.print("\nI2C speed:\t");
+ // SERIAL_OUT.println(16000/(16+2*TWBR));
+ // SERIAL_OUT.print("TWBR:\t");
+ // SERIAL_OUT.println(TWBR);
+ // SERIAL_OUT.println();
 
  totals = 0;
- Serial.print("\nTEST: timing writeByte()\t");
+ SERIAL_OUT.print("\nTEST: timing writeByte()\t");
  uint32_t start = micros();
  ee.writeByte(10, 1);
  uint32_t diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
- Serial.print("TEST: timing writeBlock(50)\t");
+ SERIAL_OUT.print("TEST: timing writeBlock(50)\t");
  start = micros();
  ee.writeBlock(10, (uint8_t *) &data2, 50);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
- Serial.print("TEST: timing readByte()\t\t");
+ SERIAL_OUT.print("TEST: timing readByte()\t\t");
  start = micros();
  ee.readByte(10);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
- Serial.print("TEST: timing readBlock(50)\t");
+ SERIAL_OUT.print("TEST: timing readBlock(50)\t");
  start = micros();
  ee.readBlock(10, (uint8_t *) &data2, 50);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
- Serial.print("TOTALS: ");
- Serial.println(totals);
+ SERIAL_OUT.print("TOTALS: ");
+ SERIAL_OUT.println(totals);
  totals = 0;
 
  // same tests but now with a 5 millisec delay in between.
  delay(5);
 
- Serial.print("\nTEST: timing writeByte()\t");
+ SERIAL_OUT.print("\nTEST: timing writeByte()\t");
  start = micros();
  ee.writeByte(10, 1);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
  delay(5);
 
- Serial.print("TEST: timing writeBlock(50)\t");
+ SERIAL_OUT.print("TEST: timing writeBlock(50)\t");
  start = micros();
  ee.writeBlock(10, (uint8_t *) &data2, 50);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
  delay(5);
 
- Serial.print("TEST: timing readByte()\t\t");
+ SERIAL_OUT.print("TEST: timing readByte()\t\t");
  start = micros();
  ee.readByte(10);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
  delay(5);
 
- Serial.print("TEST: timing readBlock(50)\t");
+ SERIAL_OUT.print("TEST: timing readBlock(50)\t");
  start = micros();
  int xx = ee.readBlock(10, (uint8_t *) &data2, 50);
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
  totals += diff;
 
- Serial.print("TOTALS: ");
- Serial.println(totals);
+ SERIAL_OUT.print("TOTALS: ");
+ SERIAL_OUT.println(totals);
  totals = 0;
 
  // does it go well?
- Serial.println(xx);
+ SERIAL_OUT.println(xx);
 
- Serial.println("\nTEST: determine size");
+ SERIAL_OUT.println("\nTEST: determine size");
  start = micros();
  int size = ee.determineSize();
  diff = micros() - start; 
- Serial.print("TIME: ");
- Serial.println(diff);
- Serial.print("SIZE: ");
- Serial.print(size);
- Serial.println(" KB");
+ SERIAL_OUT.print("TIME: ");
+ SERIAL_OUT.println(diff);
+ SERIAL_OUT.print("SIZE: ");
+ SERIAL_OUT.print(size);
+ SERIAL_OUT.println(" KB");
 
- Serial.println("\tDone...");
+ SERIAL_OUT.println("\tDone...");
 }
 
 void loop() 
@@ -186,14 +193,14 @@ void dumpEEPROM(uint16_t addr, uint16_t length)
  {
  if (addr % 10 == 0)
  {
- Serial.println();
- Serial.print(addr);
- Serial.print(":\t");
+ SERIAL_OUT.println();
+ SERIAL_OUT.print(addr);
+ SERIAL_OUT.print(":\t");
  }
- Serial.print(b);
+ SERIAL_OUT.print(b);
  b = ee.readByte(++addr); 
- Serial.print(" ");
+ SERIAL_OUT.print(" ");
  }
- Serial.println();
+ SERIAL_OUT.println();
 }
 // END OF FILE