A000116 Datasheet A000116 | P4-P6

Communication

The Arduino Tian has a number of facilities for communicating with a computer, with

another Arduino or other microcontrollers, and with different devices like phones,

tablets, cameras and so on. The SAMD21 provides one hardware UART and three

hardware USARTs for 3.3V serial communication.

The Arduino software includes a serial monitor allowing simple textual data to be sent

to and from the board. The RX and TX LEDs on the board will flash when data is

being transmitted via the ATSAMD21G18 chip and USB connection to the computer

(but not for serial communication on pins 0 and 1).

The USB port is connected to the CP2105. It allows for serial (CDC) communication

over USB. This provides a serial connection to the Serial Monitor or other

applications on your computer. When the board is connected to the computer appear

2 COM ports/ttyUSB, one is connected to the UART of SAMD21, while the other is

connected to the serial port of the Linux processor.

The SAMD21 also supports TWI and SPI communication. The Arduino software

includes a Wire library to simplify use of the TWI bus. For SPI communication, you

can use the SPI library.

Programming

The Arduino Tian can be programmed with the Arduino software (download).

If you use Linux-based OS follow the guide Arduino IDE onLinux-basedOS.

Uploading sketches to the SAMD21 is different from how it works with the AVR

microcontrollers found in other Arduino boards: the flash memory needs to be erased

before being re-programmed. Upload operation is managed by a dedicated ROM

area on the SAMD21.

USB port: To use this port, select "Arduino Tian as your board in the Arduino IDE.

The USB port is connected to the CP2105. Installated the driver the user view two

serial ports: one for SAMD21 and other for AR9342. Connect the Tian USB port (the

one closest to the reset button) to your computer. Opening and closing the USB port

at 1200bps triggers a 'soft reset' procedure:the board is restarted with the boot

loader.

Note:

Keep in mind that every time you open the Serial Terminal then the Microcontroller is

resetted.

Note:

At the moment the Bridge library isn't compatible but it is possible to use the Ciao library.

Automatic (Software) Reset

Rather than requiring a physical press of the reset button before an upload, the Tian

is designed in a way that allows it to be reset by software running on a connected

computer. The reset is triggered when the Tian's virtual (CDC) serial / COM port is

opened at 1200 baud and then closed. When Initiation this happens, the processor

will reset, breaking the USB connection to the computer (meaning that the virtual

serial / COM port will disappear). After the processor resets, the bootloader starts,

remaining active for about 8 seconds. The bootloader can also be initiated by

pressing the MCU-RST button on the Tian. Note that when the board first powers up,

it will jump straight to the user sketch, if present, rather than initiating the boot loader.

Because of the way the Tian handles reset it's best to let the Arduino software try to

initiate the reset before uploading, especially if you are in the habit of pressing the

MCU-RSTbutton before uploading on other boards. If the software can't reset the

board you can always start the bootloader by pressing the reset button on the board.

Overview

The new Arduino Tian board is powered by Atmel’s SAMD21 MCU, featuring a 32-bit ARM

Cortex® M0+ core and a Qualcomm Atheros AR9342, which is an highly integrated MIPS

processor operating at up to 533MHz and feature-rich IEEE802.11n 2x2 2.4/5 GHz dual-band

WiFi module. Qualcomm Atheros MIPS supports a Linux distribution, based on OpenWRT

named Linino. The Arduino Tian has also a build in 4GB eMMC memory that will can be

helpful to build your projects. It is possible to Switch ON/OFF the Linux port from the MCU

to reduce the power consumption.

NB: In some countries, it is prohibited to sell WiFi enabled devices without government

approval. While waiting for proper certification, some local distributors are disabling WiFi

functionality. Check with your dealer before purchasing a Tian if you believe you may live in

such a country.

NB.

Before to start to run Arduino Tian must install CP201x driver on the computer.

Drivers link:http://www.silabs.com/products/interface/Pages/CP2105EK.aspx

(http://www.silabs.com/products/interface/Pages/CP2105EK.aspx)

ARDUINO MICROPROCESSOR

Processor Atheros AR9342

Architecture MIPS

Operating

Voltage

3.3 V

Flash Memory 16 MB + 4 GB eMMC

RAM 64 MB DDR2

Clock Speed 560 MHz

WiFi

802.11 b/g/n 2.4

GHz dual-band

Ethernet

802.3 10/100/1000

Mbit/s

USB 2.0 Host

ARDUINO

MICROCONTROLLER

Microcontroller SAMD21G18

Architecture

ARM Cortex-

M0+

Operating Voltage 3.3 V

Flash memory 256 KB

SRAM 32 KB

Clock Speed 48 MHz

Analog I/O Pins 6

DC Current per I/O

Pins

7mA (I/O Pins)

GENERAL

Input Voltage 5 V

Digital I/O Pins 20

PWM Output 12

Power

Consumption

470 mA

PCB Size 53 x 68.5 mm

Bluetooth

CSR8510,

Bluetooth with

EDR / BLE 4.0

Weight 36 g

Product Code A000116

201

http://www.arduino.org/products/boards/arduin

-tia

P1-P3 P4-P6

A000116

Mfr. #:

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Description:

Single Board Computers Arduino Tian

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