68hc11 microcontroller

I2C bus principle and application example The I2C (Inter-Integrated Circuit) bus is a two-line serial bus developed by Philips to connect the microcontroller and its peripheral devices. The I2C bus was originally developed for audio and video devices in 1980s and is now mainly used in server management, including communication in the status of a single component. For example, the administrator can query each component to manage system

Widgeduino-unveiled on Kickstarter recently-is a smart and easy-to-configure window-based on Microsoft Windows platform and Microcontroller System Communication applications based on Atmel-based Arduino board. Essentially, widgeduino communicates with the Microcontroller System through the serial port protocol or TCP/IP. "This includes, among others, keyboard, LED light, pressure gauge, knob, Slider, therm

This article is original by purplesword (jzj1993). For more information, see. Original web site http://blog.csdn.net/jzj1993 Everyone has used calculators. Have you ever wondered how they are implemented? Here, I will not elaborate on the principle of the calculator, but will just give a brief introduction to the idea. After learning the microcontroller, you can also create a calculator. What should I do if I use a circuit for mathematical calculati

ProcessorIt is a low-power processor featuring low number of doors, short interrupt latency, and low debugging costs. The Cortex-M4F processor has the same functionality as the Cortex-M4 and includes floating point functionality. These processors are dedicated to applications that require digital signal processing. Arm Cortex-M3 ProcessorIt is a low-power processor featuring low number of doors, short interrupt latency, and low debugging costs. It is designed for deep embedded applications tha

execution. In addition, if you place a breakpoint in such a condition block, even if the status is false, it may still be executed. Even so, in my limited test, the compiler seems to refuse to generate conditional execution commands in the debugging configuration. Therefore, it should only happen after debugging and optimization code. Unfortunately, sometimes you have no choice but to do so. Thumb The thumb instruction set is a subset of the arm instruction set. After compression, the command i

of Freescale microcontroller. The book consists of three chapters and 24 chapters: The first part is the basic knowledge. It briefly introduces the hardware structure and working principle, command system, C Language Development basics and common development tools of Freescale single chip microcomputer, and guides readers to familiarize themselves with the hardware features of Freescale single chip microcomputer, get started with programming. The sec

1. OverviewThis design uses the FPGA technology, realizes the 8051 monolithic microcomputer soft core in the FPGA, the external SPI Flash code data loads into the FPGA internal RAM, then resets the MC8051, realizes the external flash startup MC8051.2. System Block Diagram8051 uses Oregano Systems Inc. open source MC8051 soft core. SPI Flash uses the W25Q16 chip to store 8051 of code programs. The system diagram is as follows:650) this.width=650; "src=" http://s2.51cto.com/wyfs02/M02/8C/A7/wKiom1

In the actual application, will encounter the host computer to a single-chip computer to send data, this time need to configure a microcontroller for the slave device, ready to accept dataTurn on event and cache interrupts when using hardware I²c I2c_itconfig (SLAVER_I2C, I2C_IT_EVT | I2c_it_buf, ENABLE);Then accept the data in the Interrupt service functionvoidSlaver_i2c_ev_irq_handler (void){ Switch(I2c_getlastevent (SLAVER_I2C)) {//ev1:addr=1

return) or two branches of if-else. This is because, although the Code passes through the processor as much as possible, some of the Code is not actually executed, that is, conditional execution. In addition, if you place a breakpoint in such a condition block, even if the status is false, it may still be executed. Even so, in my limited test, the compiler seems to refuse to generate conditional execution commands in the debugging configuration. Therefore, it should only happen after debugging

sensors, intelligent actuators, and intelligent controllers. They are installed on the measurement and control site, it is used to directly obtain the parameters of the on-site equipment or perform relevant operations and functions. Compared with traditional devices, intelligent measurement and control units are equipped with CAN controller modules that support the CAN bus communication protocol. Therefore, Unit 3 can not only communicate with the host computer system, but also receive data fro

I will not talk much about it. I will first copy an introduction from the official website. The new atmel avr Studio 5 Atmel avr Studio 5 is the integrated development environment (IDE) for developing and debugging embedded atmel avr applications. the AVR Studio 5 ide gives you a seamless and easy-to-use environment to write, build, and debug your C/C ++ and your er code. Introducing atmel avr Studio 5 Creating a new C Project for GCC in atmel avr Studio 5 How to build a project in atmel avr

nrf903. The circuit structure 2 is shown in. The Atmel-based 8-bit low-power CMOS Proteus microcontroller, developed by ATMEL, features 1 MIPS/MHz performance, 16 K flash, 512-byte EEPROM, and 1 K-byte memory, 35 General I/O Ports, 32 general-purpose registers, three timers, internal and external interrupt sources, two programmable UART ports, SPI ports, and three power-saving modes that can be selected through software.The WGM-12864B module is a m

1 I2C communication protocol and S3C2410 chip Introduction I2C (Inter Integrated Circuit) bus was launched by Philips in 1980. The I2C bus transmits information between the bus and the device using two wires (SDA and SCL), serial communication between the microcontroller and external devices, or bidirectional data transmission between the master device and the slave device. The two communication lines are pulled up to + 5 V through the pull-up resisto

This project has been in operation for four months. Two weeks to find the microcontroller internal ad touch screen information, two weeks to select both with USB and with AD appropriate microcontroller. Two weeks of testing and demonstration, draw a schematic diagram. Then make the PCB and debug the engineering code. The successful experiment function is only the first step. debugging the Flying Point and f

drain, so it is no problem to drive the led when the current is filled. That is: VCC> throttling resistance> led> P0. Fill current: When the IO port is low, the current from the outside of the IO port "fill" into the microcontroller opposite is "pull current" when the IO port is high, the current flows out of the microcontroller to power the load. The P0 port can work in two ways: Bus and Io. Simply put, P

In Linux, you can get started with "maid" and "maid ". The first contact with single-chip microcomputer, naturally choose a simple 51 single-chip microcomputer. However, my operating system is Linux. It seems easy to get started with 51 in Windows. However, it is not easy to build 51 development environment on Linux. Let's talk about how to set up the development environment of the STC89C52RC in Linux. (1) Select your preferred code editor. Vim, emacs, gedit, and so on. (2) Install the compiler.

. Click output to check the crate hex If the imported c file does not have any code, write it again. Then, click the following three buttons. If the imported c price is written, you can click Open the Desktop Folder again and find that many files are added, including hex files. Now you can burn the hex file to the microcontroller. Here I am using STC Click the exe file Modify the baud rate of your mcu com port, click "single open file", and sele

the same functions. As follows: (1) perform the remainder operation.A = a % 8;You can change it:A = a 7;Note: Bit operations can be completed in only one instruction cycle, while most of the C compiler's "%" operations are completed by calling subprograms. The code is long and the execution speed is slow. Generally, bitwise operations can be used to obtain the remainder of 2n. (2) Square CalculationA = pow (a, 2.0 );You can change it:A = a *;Note: In a single-chip computer with a built-in hard

coils are embedded in the underground near all directions at the entrance. When the automobile passes through, eddy current loss will occur, and the inductance of the ring insulated wire will be reduced, the vehicle pass can be detected, and the signal is converted into a standard pulse signal as the control input of the programmable controller, and the duration of the traffic light is automatically adjusted according to certain control rules by using the PLC count.Compared with the traditional

A 51 Development Board was developed recently, as shown in. This board is very simple,All I/O ports are extracted, and Peripherals can be expanded by themselves. P0 is used to pull up the resistance,11.0592 M crystal oscillator, reset key, DC power plug, DC power self-locking switch, microcontroller lock seat, expansion of three VCC And Gnd. Compared with the large development board bought by students, this board is more customizable. Because there ar