The explosive growth of global wearable devices can not help but let me think of the meaning of design. If the development of technology is changed or improves our current quality of life, what is the meaning of wearable equipment? I have seen the Gear released by Samsung, and I am disappointed. If you don't use a word, it is "". This reminds me another simple children's smart watch released by another humanized product - Filip, and parents can monitor their children through mobile app real-time. This is integrated into the product in real time. This is in real improvement and improvement. People's lives, I think, is the meaning of design.
I still remember that the rise of the Internet of Things was unstoppable, but so far, I have not seen the truly popularized, the reason is that the trailer is too small, and there is no "big potential". Some things can't be strong, but some things seem to be self-demonstrated, in today, Intel released two low-power network chips, officially added this "Noah's Ark", In an instant, the concept of the Internet of Things was again pushed to a climax. I don't know if the big giants who have already gone on the Internet of Things road will not feel pressure, so that they can further take a hundred feet. For the shortcomings, today's love board will introduce a wireless solution that can be applied to the Internet of Things - ATmega256RFR2 XPRO development board provided by the IoT pioneer Atmel.
XPLAINED Pro is an MCU assessment platform of Atmel that fully evaluates the performance of the Eitmel microcontroller. XPLAINED PRO boards such as SAM4S-XPro, SAM4L-XPro, is based on ARM Cortex core, and ATMEGA256RFR2 XPLAINED PRO is unique, based on Atmel's own AVR microcontroller. There is no surprising, XPlained Pro series iconic streamlined robot box, I hope to open it a lot of surprises.
ATMEGA256RFR2 single-chip wireless solution
Temperature sensor module
Peripheral function interface
5 20pin standard extensions
EDBG module
Atmega256RFR2 XPLAINED PRO Basic Features
Some new features on boards
The back of the board is like other XPlained Pro series, only one edbg module
Atmel atmega256rfr2 microprocessor onboard debug module:
USB interface, programming and debugging (target) By serial line debugging (SWD)
Virtual COM port passes the UART connection target, four GPIO implementation code import
Eitmel Data Gateway Interface (DGI) By synchronizing UART or TWI connection target
Digital I / O:
Two mechanical buttons, user buttons and reset buttons
One user LED, five extensions, two alternate signal interfaces
Antenna
Ceramic chip antenna (2450BM15A0015E)
SMA connector of an external antenna
Temperature sensors and EEPROM (AT30TSE758) two different power supply methods
External power supply
Embedded debugger USB power supply
12MHz crystal, 32kHz crystal
Atmega256RFR2
Atmega256RFR2 XPLAINED PRO does "some" is different. Its core ATMEGA256RFR2 is a low-power CMOS microcontroller based on AVR enhanced RSIC architecture. It can reach 1MIPS / Hz processing speed in a single clock cycle. It is more integrated with high data transceivers of 2.4GHz band, support 250 KB. / s to 2 Mb / s high data transmission, excellent acceptance sensitivity and high emission power are also its highlights. Should see the principle of Atmega256RFR2.
Atmega256RFR2 internal architecture layout is very clear, an AVR core, rich in instruction set and 32 working registers; a completely integrated ZigBee solution 2.4G Hz transceiver, he is one, which is born now in accordance with IEEE 802.15.4 Standard Single Chip Wireless Solution --ATMEGA256RFR2.
Maybe someone will be confused, what is Zigbee? Simply put, ZigBee is a highly reliable wireless digital network, similar to CDMA and GSM networks. However, it is different from voice transmission of mobile communication networks, and ZigBee is mainly data transmission, which is a wireless network protocol for low-speed short-range transmission, follows IEEE 802.15.4. The main characteristics of ZigBee networks are low-power, low cost, low rate, support a large number of nodes, support a variety of network topologies, low complexity, fast, reliable, safe, so generally mainly in industrial field automation control data transmission.
ZigBee brief hardware block diagram
ZigBee vs IEEE802.11
Know ZigBee is a wireless network based on IEEE802.15.4 protocol standards. Is there any difference between the IEEE802.11 protocol wireless network in our daily? If IEEE802.11 is a wireless local area network (WLAN), wireless connection is performed by a 2.4GHz or 5GHz radio band; that IEEE802.15.4 is a wireless domain network (WPAN), which uses global-free ISM band communication, Such as 915MHz (US), 868MHz (Europe), 2. 4GHz (global). Moreover, there is only 250kb / s of the IEEE 802.15.4 protocol in 2.4G band, and in practical applications, the rate consumption such as channel competition response and retransmission can be applied, and the rate that can be used can be less than 100KB. / s, therefore, this also determines the ZigBee technology based on the IEEE 802.15.4 protocol compare the application of the sensor or control. As for the video, it can only reply: huh,
Atmel's ATMEGA256RFR2 is born for sensors or control in industrial, so specializes in this area, atmel does not leave, based on new architecture, developed different target platforms (microcontrollers and boards) And the MAC stack software for the radio transceiver. In this way, the portability and configurability across multiple ATMEL platforms and transceivers can be easily achieved, and the resource utilization is improved. Understand the main characteristics of Atmega256RFR2, we start the power of the board.
Power-on start
It seems that the MICRO-USB cable card with the computer, in addition to the Power LED light, the reset button can be used, the other features cannot be judged, the slit, most boards do not launch the factory settings, for the user This is very unmanned. No way, I can't judge that this program has a function. I have to find a Demo program to download. At this time, the universal atmel studio6.1 is also useful, but the speed of his turtle starts, it is really a patient moment, when The start speed can increase 50%, if this startup speed is proportional to his ASF, it is estimated that this wish is hard to achieve. After Atmel Studio6.1, the ATMEGA256RFR2 board is automatically identified, and the relevant documentation is provided, which is quite aspect and intimate for users of the initial contact card. Similarly, we open New Example Project For a new listing card, the ATMEGA256RFR2 routines are relatively relatively more, from the other side, also reacts Atmel's attention to this board, of course, this is the idea of the author, You can also play. Here, a CommON IOPORT Service Example 3 for atmega256rfr2 XPLAINED PRO routine is selected, which is a program that controls the LED by pressing the IO port.
Common IOPORT routine code
Select the corresponding configuration, compile, download, or select Debug. If the status LED will flash during the debugging process we can use the manual button SW0 to control the LED0 or extinguish: Not press -> Off; press- > Light;
Unpaged user button SW0
Press the user button SW0
This is a very simple IO control program, which is just a function of a demo, and Atmega256RFR2 is a single-chip wireless solution based on 8 AVR low-power, its function is worth affirming. Originally, the author will introduce the realization of its ZigBee function, but unfortunately, the lack of a Low-Cost Gateway board in the board, causing the abortion of this idea, but it doesn't matter, wait until when you get this board Card, we will improve the evaluation of this program and carry the story in the end. Or, if a comrade has this board, you can apply for an ATMEGA256RFR2 XPLAINED PRO board card in the panel network forum, and the evaluation continues: lol:
Low-Cost Gateway board in mirror flower
Small knot
Introducing some of the characteristics of Atmel Atmega256RFR2 XPlained Pro board, Atmega256RFR2 is a single-chip-based single-chip wireless solution based on 8-bit AVR, with ultra-low power consumption, and follows IEEE802.15.4 protocol, which can communicate globally. Very safe and convenient. It can be widely used in industrial field automation control data transmission and other applications. At the same time, Atmega256RFR2 XPLAINED PRO card also has something that cannot be understood, such as 5 20pin expansion interfaces, but actually not so many expansion boards can be used; if it is equipped with a ceramic patch at the same time for the Zigbee network Antenna and an external antenna SMA connector, but does not provide an external antenna accessory, if you need to test RF performance, I think, multiple RF test holders will be more ideal.
Reference
爱 板 网 atmel evaluation kit activity area
XPLAINED PRO platform series topic
ATMEGA256RFR2 microprocessor
Atmega256rfr2 xplained Pro Starter Kit
Atmel studio development environment
Original declaration: This article is originally created by the panel network, declined!
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