Speaking of a single board computer, everyone is not strange, what Raspberry Party, Banana, BeagleBone Black, etc. are not a classic open source hardware board. Recently, the author got a named more exaggerated open source hardware board - electric fishpai, I believe that the engineer heard of the project can engrave it. The electric fish sent a set of open source hardware boards that were customized by Baoding Electric Fish Electronic Technology for embedded beginners and embedded development initiators, so we also hoped electricity from its service objects. There is a high performance of the fishpaist, which is actually more like a development board specially developed in some specific fields. Of course, it is definitely there, and first come.
The electric fish got on the hand also comes with a lot of accessories, such as 5V / 2A adapter, serial line, Ethernet cable, and a MicroSD card and TF card reader, which makes the basic function of board cards. What is wrong?
TI's generation classic 神 U - single board computer electric fishman free application
Electric fish
Although the plastic surgery is different from the open source hardware board on the market, the workman is very elegant, 8 layers, Shenjin PCB technology, look, there is obvious unique style. For example, 9-pin serial interface, usually, this small size (95mm * 62mm) development board rarely equipped with volume-volume interface, which can see the industrial attribute style of this board.
The specific board resources of the electric fishpai are as follows.
As can be seen from the board, the electric fish party is compatible with Flash or EMMC when design, but there is no patch on the board, so it can only use the unique MicroSD card to the storage medium. In addition, some interfaces of the electric fishpaign do not have silk screen, many times, don't see the user manual, you can't directly determine what interfaces on the board, very inconvenient. The last place to vomit is the expansion interface of the network port and the JTAG interface, which uses the design structure of the FPC connector. What is this ghost? I don't understand the original intention of this design.
From the perspective of peripheral resources, the electric fish is integrated into a Gigabit Ethernet interface, USB2.0 interface, microSD card, RS232 interface, HDMI interface, LCD interface, and SPI, I2C, UART, CAN, etc. have flexible, Small, rich resources, etc.
Serial port and HDMI interface
USB HOST Interface / Ethernet Interface / Power Interface
Ti AM3352
Key to see the main application processor TI AM3352 with electric fishfad, this is one of the TI industrial grade SITARA series, Ti Sitara series processor core based on ARM Cortex-A8, in images, graphics processing, peripherals And industrial interface options such as EtherCAT and PROFIBUS are enhanced, supported advanced operating systems such as Linux and Andriod.
But take a closer understanding of the processor of Ti Sitra, found a comparative pothole is something, SITARA's series of processors are very important to integrate PowerVRSGX graphics accelerator subsystems and PRU-ICSS (programmable real-time units) System and industrial communication subsystems, as shown below.
The graphics accelerator subsystem provides a 3D graphics acceleration feature to support display and game effects, while PRU-ICSS and ARM cores are independent of each other, allowing individual operations and timing to achieve higher efficiency and flexibility, but regret that electric fish is equipped This AM3352 does not support these two functions. I feel that I feel cold in a cold, and the BeagleBone Black once played. Regardless of functionality, or the price, there is no advantage, and I really should have a word. "There is a heart to kill, no power back".
But you ask, why do you have such a board to launch? Can only be attributed to the market demand of differentiation. As we all know, TI SITARA has a number of models, mainly considering subdivided market applications, and each U in the more specific application can achieve functional and price balance, this AM3352 on the electric fish Personally more than multi-user experience, no multi-human interaction application, such as facing medical instruments, video surveillance, communication and other industrial embedded control areas, the specific parameters of AM3352 are not allowed, direct Very detailed information can be found in Ti official website.
Power-on experience
Telling, the 9PIN interface of the electric fish can say that there is a good place. If you use a desktop, it is very convenient. If you use a laptop, it is very embarrassing, you want to view the output requires HDMI Line or your own DIY serial port, or otherwise use other ways such as SSH, etc. I use a desktop, so use the most convenient way.
After power-on, you can see the system launched by serial entry. It also confirms the previously doubtful place. The specific storage of the board is indeed only 128MB, which basically eliminates the graphical system experience.
The system built into the MicroSD card is based on angstrom-based Arago Project. This is one of the open embedded (OE) concepts launched by Ti. Personally feel the meaning of customized version of Linux, developers usually need to minimize memory occupancy Area or other custom-made LINUX cropping to meet its own product applications.
Use the root command to enter the system, the built-in system uses the configuration method of automatically acquiring the IP address by default, and directly inserts the network cable.
Familiar with Linux, you can toss according to your wishes. If you don't want to be interested in the built-in system, you can burn your own system by building Linux's PC development environment. This part is no longer one. Introduced, there are related introductions in the information given by the electric fish technology.
summary
Simply experienced the single board computer with the electric fish, the onboard resource is comparable to the mainstream board open source hardware board, but the application function is too much, the extension is not rich. Overall, I am more inclined to the electric fish to face the enterprise-level developer user or engineer, and the application of more than multi-user experience, no multi-human machine interaction, that is the AM3352 of Ti The processor's real space is subdivided, and for students or engineers developed for the initial contact of embedded systems, I am not particularly recommending electric fishpai. After all, learning is relatively small, like a Raspberry Piece, beaGlebone and other open source orders. Board computers are better choices.
Other board computers recommended:
Raspberry
Banana party evaluation
Rico Board Development Board Review
Original declaration: This article is originally created by the panel network, declined!
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