initial commit microcontroller unit (mcu) arduino sketch for the custom bluetooth scale.

arduino_mcu/libraries/I2C_eeprom/I2C_eeprom.h

@@ -0,0 +1,67 @@
+#ifndef I2C_EEPROM_H
+#define I2C_EEPROM_H
+//
+//    FILE: I2C_eeprom.h
+//  AUTHOR: Rob Tillaart
+// PURPOSE: Simple I2C_eeprom library for Arduino with EEPROM 24LC256 et al.
+// VERSION: 1.0.05
+// HISTORY: See I2C_eeprom.cpp
+//     URL: http://arduino.cc/playground/Main/LibraryForI2CEEPROM
+//
+// Released to the public domain
+//
+
+#include <Wire.h>
+
+#if defined(ARDUINO) && ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#include "Wstring.h"
+#include "Wiring.h"
+#endif
+
+#define I2C_EEPROM_VERSION "1.0.05"
+
+// I2C_EEPROM_PAGESIZE must be multiple of 2 e.g. 16, 32 or 64
+// 24LC256 -> 64 bytes
+#define I2C_EEPROM_PAGESIZE 64
+
+// TWI buffer needs max 2 bytes for address
+#define I2C_TWIBUFFERSIZE  30
+
+// to break blocking read/write
+#define I2C_EEPROM_TIMEOUT  1000
+
+// comment next line to keep lib small
+#define I2C_EEPROM_EXTENDED
+
+class I2C_eeprom
+{
+public:
+    I2C_eeprom(uint8_t deviceAddress);
+
+    int writeByte(uint16_t address, uint8_t value);
+    int writeBlock(uint16_t address, uint8_t* buffer, uint16_t length);
+    int setBlock(uint16_t address, uint8_t value, uint16_t length);
+
+    uint8_t readByte(uint16_t address);
+    uint16_t readBlock(uint16_t address, uint8_t* buffer, uint16_t length);
+
+#ifdef I2C_EEPROM_EXTENDED
+    uint8_t determineSize();
+#endif
+
+private:
+    uint8_t _deviceAddress;
+    uint32_t _lastWrite;  // for waitEEReady
+
+    int _pageBlock(uint16_t address, uint8_t* buffer, uint16_t length, bool incrBuffer);
+    int _WriteBlock(uint16_t address, uint8_t* buffer, uint8_t length);
+    uint8_t _ReadBlock(uint16_t address, uint8_t* buffer, uint8_t length);
+
+    void waitEEReady();
+};
+
+#endif
+// END OF FILE