After successful initialization, the function aci_gap_create_connection is used to connect directly according to the address, but it returns 0x46 BLE_STATUS_NOT_ALLOWED. The connection cannot be succe...
1 System Overview
As shown in the figure, this is the principle block diagram of the entire video acquisition system. At the beginning of power-on, the FPGA needs to initialize the register configurat...
After learning that I had the honor to participate in the NXP Rapid IoT evaluation, I started to install the mobile APP. According to my previous experience, I chose to use my mobile phone to log in t...
A Bluetooth Smart Key Fob is a small, coin-cell powered mobile phone accessory that features buttons, a buzzer, LEDs, and an accelerometer, and embodies the use of BLE GATT service profiles such as th...
I am going to use the CAN bus recently. I have three boards with CAN transceiver PHY, a TMS320F28377S LAUNCH, a GD32VF103V EVAL, and a MM32 eMiniBoard. I remember that I had a small board with CAN PHY...
The wireless voice communication system provides a voice dispatching function. On the basis of the existing fixed-line telephone terminals, wireless telephone terminals connected to the wireless netwo...
0 Introduction With the increasing prominence of global issues such as environmental pollution and energy crisis, low-emission, energy-saving and economical vehicles such as alternative fuel vehicle...[Details]
Design requirements:#
Using DC motor as fan
The keyboard can adjust the fan speed
Design Overview:
According to the design requirements, the fan needs to be turned o...[Details]
In portable electronic products, higher power efficiency means longer battery life, and linear regulator efficiency = output voltage × output current / input voltage × input current × 100%. Therefore...[Details]
Summary: This article mainly introduces the SPI interface of STM32, cubeMX software configuration of SPI interface and analysis of SPI related codes. Introduction to STM32 SPI: (1) SPI protocol ...[Details]
On July 4, the establishment and unveiling ceremony of the Modern Industrial College of Integrated Circuit Technology was held in Zhuhai High-tech Zone. The industrial college was jointly established...[Details]
Electric vehicle (EV) onboard chargers (OBCs) can take many forms depending on power level and functionality, ranging from less than 2kW in applications such as electric locomotives to 22kW in high...[Details]
What kind of sparks will be produced when the time digital converter TDC-GP22 meets the ultra-low power ARM CortexM3 MCU? The answer is: it can achieve a leap from traditional mechanical water meters ...[Details]
As the light source of street lamps, LED has many advantages over traditional light sources, such as long life, good earthquake resistance, adjustable brightness, small luminous flux loss, luminous d...[Details]
1. Experimental Purpose Master the steps of using the 51 single-chip microcomputer development board; Master the installation process of the software required for the 51 MCU development board; Take...[Details]
Huawei will not give up the European market on its own initiative. Previous information shows that the new Huawei Mate 40/Pro series has been certified by the EEC (Eurasian Economic Commission)...[Details]
The 2019 Guangzhou Auto Show will open tomorrow. As the year-end "closing" drama of the automotive industry, the flourishing new car lineup has become a shot in the arm for the continuously sluggish ...[Details]
To design low power consumption, we need to consider several aspects: 1. Low power consumption of peripherals. All unnecessary peripheral modules are turned off. 2. GPIO processing: it is best to pro...[Details]
With the rapid development of infrared detection technology, the amount of data to be processed by today's infrared real-time image processing systems is getting larger and larger, and the speed requ...[Details]
A more complete CH340 and CH341 application notes CH340 In the past, when using USB to serial port, people usually bought ready-made USB to serial port modules for convenience. However, due to later ...[Details]
The control circuit diagram for the forward rotation of the motor is an example of a control circuit that realizes the inching operation of the motor through a button inching operation. The circuit...[Details]