As the title says, I have an urgent question. I would like to ask an expert. The Bluetooth protocol only supports one ACL link and three SCO links between master and slave devices. Does this mean that...
The title is: Use two timers to control the buzzer sound at the same time, timer 0 controls the frequency, timer 1 controls the duration of the same frequency, and outputs a 1k (hz) square wave at an ...
[i=s]This post was last edited by qi777ji on 2021-8-25 13:34[/i]Today I read the chapters on LED dot matrix and LCD. I have not used LED dot matrix in my projects, but only on the development board. I...
[i=s]This post was last edited by chenbingjy on 2015-10-16 15:23[/i] I am working on Android Bluetooth communication, using a mobile phone to communicate with the Bluetooth on a microcontroller board....
We just exposed Lezhibang's Moye LT sound card not long ago. Recently, Lezhibang's "Moye 5.1" sound card with ethnic characteristics has arrived in Xi'an. "Moye" sound card is one of the three series ...
[i=s]This post was last edited by Zhanma on 2014-4-30 21:29[/i] [postbg]bg10.png[/postbg][align=left][font=宋体][size=3]SensorTag uses Bluetooth 4.0 BLE. Since classic Bluetooth cannot connect to BLE de...
Dong Yang, executive vice president of the China Association of Automobile Manufacturers, said on the 26th that according to the authorization of the Ministry of Industry and Information Technology...[Details]
In 2017,
Sanan Optoelectronics
achieved sales revenue of 8.394 billion yuan, operating profit of 3.856 billion yuan, and net profit attributable to shareholders of the parent company of 3.1...[Details]
"Originally, there are many people who can design very good
chips
, but the market does not give domestic
chips
the opportunity to iterate, and domestic companies cannot give engine...[Details]
1. Problem When developing STM32 with IAR, I found that I could not print floating point numbers by redirecting printf to the serial port. The code is as follows: The output is as follows: It can...[Details]
For STM32, there are two ways to reset the software: 1) Use the official software library The system reset function is directly provided in the stm32f10x_nvic.c file of the official software li...[Details]
All relevant units:
In accordance with the relevant requirements of the provincial and municipal electric vehicle charging infrastructure construction work, in order to further standardize the...[Details]
Recently, the "Smart Photovoltaic Industry Development Action Plan (2018-2020)" jointly issued by six departments has put this concept on the forefront. Photovoltaic smart solutions will become the ne...[Details]
This small program is still the use of timer, which is relatively simple. The specific parts are noted in the comments, please refer to the comments. /*********************************************...[Details]
What is SYSTICK: This is a 24-bit system tick timer, SysTick, with automatic reload and overflow interrupt functions. All microcontrollers based on the Cortex_M3 processor can obtain a certain time ...[Details]
With the development of information technology, intelligence, informatization and networking have become the development trend of modern industrial control. Since the 1980s, the rapid development...[Details]
Independent watchdog (IWDG) and low power mode are often used in STM32 development. The watchdog is to detect and solve faults caused by software errors, and the low power mode is to enter sleep mode...[Details]
STM32 has three startup modes. In RM0008 downloaded from the ST official website, you can find the startup-related configuration instructions: Translated into Chinese: The storage media corresp...[Details]
1. What is PWM What is PWM? Professionally speaking, it is pulse width modulation. In layman's terms, it is the continuous output of high and low levels. For example, the microcontroller outputs...[Details]
The frequency calculation formula of the PWM wave generated by the output comparison mode of the timer is: 72M/((2*(arr+1))*(psc+1) ) For example, if you set: PWM_Init(1000-1,72-1); (PWM_Init(arr,psc...[Details]