Unboxing Review (Part 3) Preliminary Understanding

小火苗

Unboxing Review (Part 3) Preliminary Understanding [Copy link]

Unboxing Review

I am very happy to receive the MYD-J1028X evaluation board. Thanks to Electronics World Forum and Mir Technology for providing such a good trial opportunity.

I first sorted out the development process (development ideas), carefully understood the technical manual of the evaluation board, and then carried out development after the code.

• Physical

• Quick Trial Guide

The evaluation board product package includes a quick start booklet with descriptions in both Chinese and English.

The manual briefly introduces the evaluation board interface, BOOT dial selection, debug serial line, DP connection display, debug serial communication frequency and product information connection. http://d.myirtech.com/MYD-J1028X/

• Software List

The source codes of ATF, rcw, uboot, kernel, file system and application programs of MYD-J1028X are completely open. Users can obtain them from the CD image and get the updated version through the code hosting platform. The code information of each part is as follows:

- ATF:

Version: V1.5 URL: https://github.com/MYiR-Dev/myir-ls-atf.git

Branch: LSDK_atf

- RCW:

Version: V1.0 URL: https://github.com/MYiR-Dev/myir-ls-rcw.git

Branch: LSDK_rcw

- U-boot:

Version: V2020.04 URL: https://github.com/MYiR-Dev/myir-ls-uboot.git

Branch: LSDK_uboot

- Linux Kernel:

Version: V5.4.47 URL: https://github.com/MYiR-Dev/myir-ls-linux.git

Branch: linux-5.4.47

- LSDK:

MYIR-MYD-J1028X-SW-RN-ZH-L5.4.47

- 12 -

Version: V20.12 URL: https://github.com/MYiR-Dev/myir-ls-lsdk.git

Branch: LSDK2012

In order to facilitate users to transplant the kernel, the source code paths of each kernel driver module are organized as follows:

• Hardware Resources (MYC-J1028X Hardware Design Guide)

4.1. Power supply protection circuit design provides two design solutions for protection. I personally think it is very valuable to learn.

4.2. In this hardware circuit design guide, each module unit has a recommended circuit and provides wiring suggestions. Many strange problems will appear in hardware circuit design. Such suggestions do have clear rules and requirements for actual circuit layout and routing, reducing unnecessary problems.

4.3. In industrial circuit design, there are many strong currents, so isolation is particularly important. This circuit is a very typical signal isolation circuit. Some colleagues have made mistakes in signal isolation at work, so this is a special reminder for everyone.

4.4. DP interface circuit design. The circuit design is very simple because LS1028A integrates eDP PHY controller, which provides multi-protocol support standards, such as DisplayPort 1.3 and eDP 1.4. The video resolution is up to 4K@60fps.

4.5. LS1028A natively supports 1 RGMII interface. In addition, the SerDes serial interface provided by LS1028A can be configured as SGMII or QSGMII to expand the network interface. MYC-J1028X has these signals and can be configured as up to 6 Ethernet channels, among which the SGMII / QSGMII Ethernet controller supports TSN function.

littleshrimp

This board looks strong.

wangerxian

This board looks very good, looking forward to the follow-up evaluation~

bigbat

I am a little surprised to see so many drivers. Allwinner's products have always had problems with documentation. I look forward to your review.

lugl4313820

The author has compiled a lot of information, which is very attentive. He is an old friend of the forum. Many of the trials are very good. I hope you can share more experiences.