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ft260 i2c converter
ft260 usb i2c converter
ftdi usb to i2c adapter

about ftdi ft260s
Leveraging the advantages of using a standard USB HID class driver which will be already installed in most OS (our other devices are Vendor Class), the FT260 provides an ideal, fast to implement, bridge between USB and either UART or I2C peripherals. The I2C mode of operation will also support the HID over I2C protocol defined by Microsoft with Windows 8 or above.
The 2 small 28 pin packages - FT260Q (WQFN) and FT260S (TSSOP) provide the perfect bridge to your sensor or human interface peripheral applications.
Full speed HID class USB device
I2C Master interface supporting Standard Mode (SM), Fast Mode (FM), Fast Mode Plus (FM+) amd High Speed mode (HS)
UART interface supporting 1200-12MBaud
1.8V to 3.3V IO levels supported
No external crystal required
28pin WQFN /  TSSOP packages available
-40°C to +85°C
Application
HID class Device controller
USB to HID-over-I2C Bridge
USB to I2C master controller
Sensor control
USB to RS232/RS422/RS485 Converters
Interfacing MCU/PLD/FPGA based designs to USB
USB Instrumentation
Touch PAD for laptop or PC

support Arduino libary software

Installatie van Arduino IDE libraries: Arduino info
arduino logo rond
Informatie (ENG):

I2C Master Interface
This library consists of a C include file i2cmaster.h and an assembler module i2cmaster.S.
It can be used to communicate with I2C devices (serial EEPROM, serial RTC etc) from any AVR device.

I2C (TWI) Master Software Library.

#include <i2cmaster.h>

Basic routines for communicating with I2C slave devices. This single master implementation is limited to one bus master on the I2C bus.

This I2c library is implemented as a compact assembler software implementation of the I2C protocol which runs on any AVR (i2cmaster.S) and as a TWI hardware interface for all AVR with built-in TWI hardware (twimaster.c). Since the API for these two implementations is exactly the same, an application can be linked either against the software I2C implementation or the hardware I2C implementation.

Use 4.7k pull-up resistor on the SDA and SCL pin.

Adapt the SCL and SDA port and pin definitions and eventually the delay routine in the module i2cmaster.S to your target when using the software I2C implementation !

Adjust the CPU clock frequence F_CPU in twimaster.c or in the Makfile when using the TWI hardware implementaion.

Note
The module i2cmaster.S is based on the Atmel Application Note AVR300, corrected and adapted to GNU assembler and AVR-GCC C call interface. Replaced the incorrect quarter period delays found in AVR300 with half period delays.

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