Shulou(Shulou.com)06/02 Report--

This article is about how to identify RK3399 android7.1 wifi chips. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it with the editor.

RK3399's CPU adopts big.LITTLE large and small core architecture, double Cortex-A72 large core + four Cortex-A53 small core structure, greatly optimizes integer, floating point, memory, etc., and revolutionizes the overall performance, power consumption and core area. RK3399's GPU uses a new generation of quad-core ARM high-end image processor Mali-T860, integrates more bandwidth compression technologies such as intelligent superposition, ASTC, local pixel storage, etc., and supports more graphics and computing interfaces, with an overall performance improvement of 45% over the previous generation.

RK3399 Android motherboard is designed for the application development of consumer electronics, intelligent terminals, MID, wireless communications, medical equipment, industrial control and other industries, with strong video processing capabilities, ultra-high definition video output advantages, rich interfaces and stable performance. Support Android\ Linux\ Ubuntu system, perfect software support, open source code suitable for the secondary development of commercial display advertising machines with high-definition display, self-service vending machines, educational terminals, etc., can reduce the threshold of research and development, shorten the product development cycle.

Wifi chip recognition process

1. Power on the wifi module and scan sdio automatically

two。 When the system starts the open wifi operation, it reads the uevent under the system sys/bus/sdio (sdio wifi), sys/bus/usb (usb wifi), sys/bus/pic (pcie wifi) file systems respectively.

3. Get the wifi chip vid pid to load the corresponding wifi ko driver

4. After identifying the corresponding wifi module, you can know the corresponding bt model and follow different bluedroid protocol stacks.

Core code directory: android / hardware/libhardware_legacy/wifi

Kernel/net/rfkill/rfkill-wlan.c

Packages/apps/Bluetooth

Hardware/realtek/rtkbt

The above is how to identify RK3399 android7.1 wifi chips, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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