This post was last edited by Unseen on 2021-5-20 17:02
A few weeks ago, I saw a trial activity for the HarmonyOS development board - Bear Pie on the forum. I happened to be quite interested in the HarmonyOS, so I applied for it. To my surprise, I was approved.
So I happily communicated with the administrator for contact information, and now the development board is in my hands. The physical packaging is still very exquisite, and it uses a transparent blister packaging, which is a relatively common packaging for products such as development boards.
After opening it, you can see the main body of our Bear Pi development board: a blue PCBA
The development board is clearly divided into functional areas according to peripheral functions. The upper middle part is our main chip - Hi3861V100, which is a Huawei HiSilicon Wlan chip.
It supports mainstream 2.4G WiFi (CH1~14), has a built-in 32-bit MCU with a main frequency of up to 160MHz, and also includes 352KB of SRAM, 288KB of ROM and 2MB of Flash storage.
The interface of this MCU is also very rich, supporting 1xSDIO/2xSPI/2xI2C/3xUART/15xGPIO/7xADC/6xPWM/1xI2S,
The Bear Pi has basically brought out all the GPIOs through the E53 interface to the pin and female headers, which is convenient for everyone to test, which is very good.
In the middle of the PCB are two LEDs and an NFC chip:
The chip in the middle is NT3H1201W0FHKH, which is an NFC chip from NXP. The LED on the left is the NFC communication indicator, and the LED on the right is controlled by GPIO_02.
Just below the PCB is an NFC antenna:
Let’s look at the left side:
The upper part on the left side is the pin and female headers of the E53 interface, and the lower part is a CH340E USB to TTL chip, which is responsible for the communication between the PC and the Bear Pi and the burning work.
Finally, the right side:
The upper right side also has the pin and female headers of the E53 interface, and the lower right side has three micro switches, from top to bottom they are RESET, USER_KEY1, and USER_KEY2.
Hardware Schematic
Hi3861 chip manual
Official git page
NFC chip data sheet
This is the end of the introduction to the basic hardware of the Bear Pi. Next time, I will talk about how to light up our Bear Pi. Are you looking forward to using the Hongmeng system to light up the Bear Pi?
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