mirror of
https://github.com/RobTillaart/I2C_EEPROM.git
synced 2026-07-27 20:06:07 +00:00
Rob TillaartandGitHub
ff21bd6cdc
- simplify **begin()**, remove setting Wire pins from library. - add **getAddress()** - update readme.md - update examples
94 lines
1.9 KiB
Arduino
94 lines
1.9 KiB
Arduino
//
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// FILE: I2C_eeprom_struct.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo I2C_EEPROM library store /retrieve struct
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//
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// uses a 24LC256 (32KB) EEPROM
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// as this test writes a lot it might wear out EEPROMs eventually.
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//
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#include "Wire.h"
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#include "I2C_eeprom.h"
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I2C_eeprom ee(0x50, I2C_DEVICESIZE_24LC256);
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uint32_t start, duration;
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struct
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{
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float temperature;
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float humidity;
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float pressure;
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} measurement;
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void setup()
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{
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Serial.begin(115200);
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while (!Serial); // wait for Serial port to connect. Needed for Leonardo only
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Serial.println(__FILE__);
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Serial.print("I2C_EEPROM_VERSION: ");
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Serial.println(I2C_EEPROM_VERSION);
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Wire.begin();
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ee.begin();
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if (! ee.isConnected())
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{
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Serial.println("ERROR: Can't find eeprom (stopped)...");
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// while (1);
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}
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Serial.print("size: \t");
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Serial.println(sizeof(measurement));
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// clear EEPROM part
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ee.setBlock(0, 0, sizeof(measurement));
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// make measurement here
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measurement.temperature = 22.5;
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measurement.humidity = 53.1;
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measurement.pressure = 1000.9;
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// store it in EEPROM
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start = micros();
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ee.writeBlock(0, (uint8_t *) &measurement, sizeof(measurement));
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duration = micros() - start;
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Serial.print("write: \t");
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Serial.println(duration);
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delay(10);
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// clear measurement struct
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measurement.temperature = 0;
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measurement.humidity = 0;
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measurement.pressure = 0;
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// retrieve old measurement
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start = micros();
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ee.readBlock(0, (uint8_t *) &measurement, sizeof(measurement));
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duration = micros() - start;
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Serial.print("read: \t");
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Serial.println(duration);
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delay(10);
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Serial.print("temp:\t");
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Serial.println(measurement.temperature);
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Serial.print("hum:\t");
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Serial.println(measurement.humidity);
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Serial.print("pres:\t");
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Serial.println(measurement.pressure);
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Serial.println("\ndone...");
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}
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void loop()
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{
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}
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// -- END OF FILE
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