The industrial control field has always focused on the stability of the product, even when the hardware speed update iteration iteration, the classic processor ARM9, ARM11 relies on stability in today's industrial control stage. However, as a pursuit of enterprises, ARM is definitely reluctant to make everyone mistakenly think is just a older company, so I launched a Cortex-A5 processor, small step-by-step upgrade, intended to replace the previous Classic processor series, of course, even if it is not completely replaced, at least make the situation more differentiated, so that users have more choices.
And after the Cortex-A5 and ARM9, the parameter characteristics of the ARM11 processor are usually compared, such as the main performance / function, many companies have not hesitate to follow into the Cortex-A5 processor's industrial control board, Shenzhen Mil Technology is One of them, today's love board is shared with you a Cortex-A5 processor-based industrial control board MYD-JA5D27 from Mir Technology.
In China, I know that Mill Technology engineers should be a few, this is a company that focuses on providing ARM complete solutions, in China, especially in the field of industrial control. The next picture is the packaging, simple, atmosphere of the MYD-JA5D27 development board to be introduced today.
Side of the box has the specific model of development kit
Internal accessory list
Packing a MYD-JA5D27 development board packaged by electrostatic bags, a network cable, a miniusb cable, a serial line, and a power adapter.
The specification of the power adapter is 5V / 2A, and the power control board that Mil Technology is supplied is basically 5V or 12V.
MYD-JA5D27 hardware
MYD-JA5D27 board is real, board workman is very solid, including peripheral expansion backplane myb-ja5d2x and core board myc-ja5d2, from named, Mil Technology is very particular, D should be equal to development, That is, the development board; B should be Board, the bottom plate; Core, represents the core board, from the naming method to make the user a clear. Among them, in this development kit, the bottom plate is MyB-JA5D2X, which means that it can be compatible with different core boards, and users can select the corresponding core board according to their own needs.
In addition, the resources of the board are basically distributed on the front, but there is no metader on the back, but it will lead to an FMC interface (parallel bus interface), which is the signal line of the core board. This detail is very good, what is the core board? Problem, convenient user testing and positioning problems.
The bottom plate and the core board are connected through 200PIN DIMM gold finger interface, which can be easily removed, but in the connection, the core plate and the bottom plate are fixed by fixed screws, detailed in order to connect the reliability of the entire board. Very thoughtful. The bottom plate is powered by 5V DC, which extends the LCD, camera, USB, Ethernet, audio, TF card, RS485, RS232, CAN, RTC, IO extended function interface, etc.
MYD-JA5D27 has a very rich interface resource, and the specific distribution is shown below.
To specifically see the details of the board interface, the introduction in the following picture series is said by left right:
A debug serial port (DB9), a 3-wire RS232 serial port (DB9), a 10 / 100m Ethernet port, a miniusb host / device interface, a 5V DC JACK power supply interface.
Power switch switch, switching USB power supply or DC JACK power supply; all the way RS485 interface (green), all the way CAN interface (green), audio LINE IN / headphone interface (on-board one MIC input), a 20pin JTAG debug interface (2.54 MM spacing).
A button battery holder; USB HOST interface, MicroSD card, 4 extended interfaces (including 8bit camera interface, SPI, UART, I2C, QSPI, etc.)
3 LEDs, including a power indicator, two user LEDs, 4 mechanical buttons, including boot selection, reset, wake up, user-defined function; a 18bit LCD interface.
Therefore, the hardware block diagram of the entire MYD-JA5D27 development board is shown below.
MYC-JA5D27 core board
Myc-ja5d27 core plate based on ATMEL's ATSAMA5D27 microprocessor, board card is designed, Shenjin process, independent complete ground layer, only 67.6 mm x 45 mm, almost one credit card size. The core board contains three types of clock design, namely the 12MHz main clock of the CPU, the 32.768kHz clock of the RTC and the 25MHz clock of the Ethernet PHY.
The specific resource distribution of myc-ja5d27 is shown below.
Understand from the actual circuit, the core board only needs to provide a 3.3V power supply and the RTC power supply, and the RTC power supply can be connected to a 3.3V power supply without the need for RTC. In addition, we can also see that the core board does not adopt integrated PMU power supply, but designed a solution to the power supply, the purpose of doing this may consider more competitive price factors.
The core plate microprocessor ATSAMA5D27 is based on high energy-efficient ARM Cortex-A5 processor, the operating frequency is 500MHz, the chip supports DDR3, LPDDR3 and other memory, integrated LCD controller, Touch controller, audio, camera interface, EMAC, USB , Double CAN and a rich peripheral resource such as 10 UART. At the same time, ATSAMA5D27 also provides advanced security features to protect user code and transmission of external data.
Hardware block diagram of atsama5d mpu
Used
The MYD-JA5D27 factory has built a simplified version of Linux, so it can be used to open the box. In addition, the MYD-JA5D27 development board supports Linux4.1 system, providing information including user manual, flooring, external expansion interface driver, BSP source package, development tools. Providing developers with a complete software development environment, reducing product development cycles, and realizing rapid products.
Since there is no LCD screen in the hand, the serial port of the development board is also the interface of the DB9. The notebook used by the author did not have this interface. Therefore, the Unbuntu system on the desktop is used as the serial output host, and the configuration serial print tool minicom is installed. Parameters can be.
Power-on start, first load the primary boot program AT91Bootstrap, the secondary boot program U-boot, and then load the Linux kernel, drive.
Entering the default password for the system is root, the default network port of the development board is not open, and you need to manually activate.
Add the development board to the PC machine with one local area network, which can be accessed.
The development board provides a lot of source code for applications, we can take them directly.
Especially routine code, basic Mir Technology has formed its own way, it can be said that it is basically meeting functional testing, but it is limited to this, more optimization requires users to complete themselves. Below is the WM8904 audio codec on the board to play lossless WAV format music.
summary
Introduced the world's first ATMEL's latest series MPU SAMA5D27 development board MYD-JA5D27, which is compared to classic processor ARM9 / ARM11, with high performance, low power consumption, etc. based compared with classic processor ARM9 / ARM11. Very suitable for cost-sensitive industrial embedded applications, including home and automation, consumer medical equipment, printers, intelligent toll systems, intelligent vending machines, weighing systems, educational terminals, automotive controls, and IOT applications. The MYD-JA5D27 board will trial channel trial of the development board of the panel, don't miss the engineers who want to experience.
This article originally address: https://www.eeboard.com/evaluation/myd-ja5d27/
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Original declaration: This article is originally created by the panel network, declined!
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