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// m0EEPROM.h - definitions for 24LC256 EEPROM read and write for m0 SAMD21G18 and adafruit feather
/* The test code has a bunch of examples of usage.
*
* Note that when using multibyte reads or writes, both the SERIAL_BUFFER_SIZE and the PAGE_SIZE are
* _assumed_ to be powers of 2.
*/
#ifndef M0EEPROM_H
#define M0EEPROM_H
#include "Wire.h"
class eeprom {
int _device_address; // chip address. currently only supporting one
public:
void begin(int device_address=0x50)
{
_device_address = device_address;
Wire.begin();
}
// read a byte from the specified address in eeprom memory
uint8_t read_byte(uint16_t address);
// write a single byte of data to the given address in eeprom memory
void write_byte(uint16_t address, uint8_t value);
// read a structure of arbitrary size from address.
// the size of the structure must be less than 64K-address.
// returns a byte array of memory specified. The byte array data
// must be preallocated to the expected size.
uint8_t* read_bytes(uint16_t address, uint8_t* data, uint16_t size);
// write a structure of arbitrary size to memory at address.
// the size of the structure must be less than 64K-address.
// The structure is passed as a byte array.
void write_bytes(uint16_t address, uint8_t* data, uint16_t size);
};
extern eeprom Eeprom;
#endif // M0EEPROM_H
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