The term "Internet of Things" has been quite high in recent years, and it can even be said to be overwhelming. The black technology that used to feel like the next century has actually been applied in depth to our daily production and life. The connection between objects and intelligence, intelligent perception, is the most popular and accurate understanding of the Internet of Things. As big as industrial defense, small to clothing, food and shelter, with a little attention, you will find that it is really omnipresent.
The word "MediaTek" does not need to be over-explained because of its influence in the field of mobile devices. However, MediaTek officially announced that it will enter the IoT battlefield in 2014, which is a rising star. However, as it has been in the smart phone market, because of its deep experience in low-power and networking technology and technology accumulation, in a few years, MediaTek is also a good news in the field of Internet of Things. As a person who eats melons, we actually It will also feel the deep feelings of the Internet of Things because of its continuous bombardment of new products.
In the past, the development board of chip manufacturers was directly provided to customer manufacturers to help accelerate the development of products. However, the recent trend is that the chip manufacturers are becoming more generous, and various development boards are sent to practitioners in related fields through various free forms. Together with a large amount of open source software resources, many geeks and "siege lions" are also available. Have the opportunity to participate in the tide of promoting industry progress.
Among these generous chip manufacturers, MediaTek is included; among the lucky ones who enjoy the free benefits, they include themselves.
Yes, after a sincere and full application, I finally received a set of LinkIt 7687 IoT development board from MediaTek not long ago, and now I am officially entering the topic.
First, out of the box:
First violently tear the postal parcel and carefully remove the development board box.
The first feeling is that the size is small and exquisite, and the graphic design is also beautiful. And a lot of English, the side line is particularly conspicuous: If you can write 'hello world! ', you can change the world.
Open the outer box, and sure enough, the development board is lying in a perspective anti-static bag lying on it. If you catch J, pull it up, open the "bed" board, and you will find a data line curled up inside.
The last "blitz result" family portrait.
The overall development board feels pretty good. The two sides of the PCBA are bright and clean, and they are spotless. The layout of the components is also reasonable and very neat. Sure enough, there are famous brands and authentic styles.
The core part of the development board is of course the MT7687F controller chip in the 8*8mm 68-pin QFN package, which is squarely stretched out with a lot of pins to make the whole board. More attractive is the upper and lower rows of bright yellow GPIO expansion interface, as well as the power and USB interface, and the three circular function buttons below it. The smaller dots on the right side are arranged in a row with LED lights. Look at the far right side, comes with an onboard wireless antenna, and a spare external antenna interface.
The specific onboard hardware configuration is as follows:
(1) Power supply
USB or battery powered: Micro USB power supply (VBus, 5V) and external VIN (1.8~3.2V);
(2) LED
A variety of LED indicators, including UART communication and power, and 6 LEDs controlled by GPIO:
D6: 5V power network;
D5: 3.3V power network;
D9 (UART TX): UART1 sends an indication;
D10 (UART RX): UART1 receiving indication;
D11, D12, D13, D14, D15 can be used as other indications.
(3) function button
S4, S5, and S1 correspond to system reset, RTC (Real TIme Clock) interrupt and external interrupt, respectively.
(4) Expand GPIO
8 GPIO expansion interfaces;
(5) RTC clock module
The clock module is one of the features of the LinkIt 7687 HDK, which includes a 40MHz source crystal oscillator and a 32.768 kHz crystal for external frequency mode.
(6) USB data interface
Support: Mass Storage Device (MSD) flash programming interface; Micro USB CMSIS-DAP (Coresight Debug Access Port); Virtual COM port UART connects to PC via USB.
(7) RF
The RF signal is routed to the circuit antenna on the board.
The exterior part is here, and then look at the specific hardware features.
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