mcu 8051

architectures, the SDCC C compiler is more suitable for 8051 cores.SDCC is a command-line firmware development tool that includes a preprocessor, compiler, assembler, linker, and Optimizer. The SDCDB is also bundled in the installation file, similar to the source-level debugger of GDB (GNU debugger). The error-free program uses SDcc to compile, link, and generate an Intel hex-formatted load module.SDCC mainly consists of the following parts:sdcc– com

1) In the text box that defines the path to the containing file, there are two important syntax for defining the path to the containing file. One is $toolkit_dir$, this syntax means that the path containing the file is under the 8051 folder of the IAR installation path, that is, if the IAR is installed in the C drive, which means C:\Program Files\iar systems\embedded Workbench 4.05 Evaluation version\8051

In MP3 this project, in addition to the decoding module, the most important is the U disk read and write module, we need to send music through the U disk to the microcontroller, and then output, and in this module we choose the CH375 this chip. Similarly, because the project is still in the hardware circuit production phase, today can only briefly introduce some of its functions and its connection, the specific software read and write in detail later. CH375 Introduction: CH375 is a USB bus unive

1-hour multi-thread structure application Generally, various control systems used by single-chip microcomputer have various interaction processes such as field data collection, control output, working status detection, and data transmission; the mismatch between the response speed of various peripherals and MCU is an important factor restricting the overall performance of the system. In the face of this interaction bottleneck, the use of time-based mu

loaded to the next level of programmable gain amplifier. The echo signal is shown in circuit 3. Siganl In0 ~ The Siganl In3 corresponds to the echo signals of the four-way probe respectively, and the Signal Out is the echo Signal after buffer driving and Impedance Transformation. The P0 port of the single-chip microcomputer provides two signal lines for the MAX4141 channel selection. Table 1 shows the specific work conditions. 4 high frequency amplifier circuitThe echo signal is usually relat

chips (MCU plus DSP or MCU plus ASIC) will add more materials and more work. Dedicated, fixed-function hardware is another method, which has a significant negative impact on design flexibility. If it is customized chip design, there is also NRE (one-time engineering cost) and time to market. If it is a commercially available ASSP (standard product for specific applications), the ability to design different

Many of the friends who have done microcontroller know that after the MCU is burned to write the program firmware, then the program firmware is stored inside the MCU. The program can continue to operate even if the MCU is powered off and then re-energized. This is because the firmware of the MCU is written to write the

to carry out contactless bidirectional data transmission between the reader and the RF card in order to achieve the purpose of target identification and data exchange. The most basic RFID system consists of three parts:1. label (tag, i.e. RF card): consists of a coupling element and a chip, and the label contains a built-in antenna for communication between the RF antennas.2. Reader: The device that reads the label information (which can also be written in the read-write card).3. Antenna: Trans

Thanks to open source and non-open source of various soft phones, so that we can in the test at a very low cost and extremely happy mood, especially jitsi.① about HD cameras.The so-called 1080P HD camera only means that the codec capability of the camera hardware conforms to this standard.If you want to achieve a 1080P video call, the next step is to see if the Softphone's encoding capability supports 1920*1080p.That is: not installed on the high-definition camera, you can make high-definition v

Minimum system:A resonant circuit consisting of quartz crystals and capacitors is used in the ATMEGA16 pin XTAL1 and XTAL2 Sisu, and the oscillator source of the OSC (oscillator) oscillator circuit in the chip is used as the system clock source. A simpler circuit is to use the 4M RC oscillator directly on the chip, so that the C1, C2, R2 and 4M crystals can be omitted, the pins XTAL1 and XTAL2 floating, of course, the system clock frequency accuracy than the use of external crystals, but also su

signal to "1 ", the 2200Hz digital signal is demodulated to "0". It communicates with the MCU through a serial port, and the MCU receives command frames for corresponding data processing. Then, the MCU generates the response frame to be sent back, and the digital signal of the response frame is modulated by the MODEM into the corresponding frequency Hz and 2200H

remains above 4us, here is 4.34us to meet the requirements}voidIic_stop ()//Stop Signal{SDA=0; _nop_ ();//Readiness StatusScl=1; Delayus (); //The state stabilization time required to maintain more than 4usSda=1;//during SCL high, SDA comes up a rising edgeDelayus ();//SDA remains above 4.7us, 4.34 plus function return time greater than 4.7us//Note: Both SCL and SDA are 1 at this point}voidIic_sendbyte (U8 bytedata)//MCU sends a byte{U8 i; U8

I used to want to use the compiler to write the MCU's C code, what the compiler did to help us. How the compiler allocates variables and code. So just idle to see what the compiler's installation path is. The ICCAVR compiler and Atmel Atmega64 are used in the work. So I daoteng this compiler and mcu~~~.To be honest ICCAVR the compiler is really simple and convenient, but powerful (of course, I didn't use the other compiler O (╯-╰) o). For its basic us

The following board for my analog SWD interface is referred to as host, and the target MCU (i.e. the board I want to connect to) is referred to as target. SWD Agreement Therefore, the name Incredibles, serial Bus debugging interface. We need 3 wires connected to the target MCU, SWDIO,SWDCLK and GND. The-swdio is a bidirectional data port, and the host to the target is transmitted. -SWDCLK is the clock port,

17040) already running. Access address: http: // 192.168.50.50 It works! Hehe... It indicates that the operation is successful ~ \ (Too many rows )/~ La la ,(~ O ~)~ Zz II. (1)Mod_proxy Server Load balancer Configuration 1. Load the proxy Module All the Agent modules to be loaded are mod_proxy.so, mod_proxy.ajp.so, mod_proxy.http.so, mod_proxy.ftp.so, mod_proxy.connect.so, mod_proxy.balancer.so Because all modules have been loaded, you do not need to modify the configuration, that is, the foll

solution to integrate non-contact cards into the CPU and provide a simple and powerful application software development interface through cos software. 2. research objectives and content The purpose of this article is to design a CPU card chip with a serial contact interface and a non-contact interface. We call this design a dual-interface card.The idea of this article is how to design the chip architecture reasonably, so that the CPU, operating system software and external interface are irre

of the 8051, Xrom,xram can not, in the actual implementation, Irom and Xrom as long as there is one on the line. OC8051 provides an FPGA (Xilinx) implementation of Irom and a behavioral simulation model, all in file oc8051_rom.v, through the ' define Oc8051_xilinx_rom, using XILINX implementations, otherwise using a generic simulation model. In addition, the OC8051 project provides a tool to convert hex files to. V, and the implementation of this con

Oracle 258u REG 0,19 11026432 1868514/data/oracle/ora11g/oradata/tjdb/control03.ctlOracle 8045 Oracle 256uW REG 0,19 11026432 1867986/data/oracle/ora11g/oradata/tjdb/control01.ctlOracle 8045 Oracle 257uW REG 0,19 11026432 1868772/data/oracle/ora11g/oradata/tjdb/control02.ctlOracle 8045 Oracle 258uW REG 0,19 11026432 1868514/data/oracle/ora11g/oradata/tjdb/control03.ctlOracle 8051 Oracle 258u REG 0,19 11026432 1867986/data/oracle/ora11g/oradata/tjdb/c

The following error resolution occurs when compiling a ZigBee program using IAR Embedded Workbench:ERROR[E12]: Unable to open file ' C:\Program files\iar systems\embedded Workbench 5.3\8051\config\lnk51ew_cc2530f256.xcl ‘The error should not be found in the config file.Here's how to fix it:If you are a win7 system and are 64-bit, then you need to modify the link path, the use of 32-bit system when the installer is the default in \program Files, if it

complete a basic operation is called the machine cycle. Generally, a machine cycle consists of several s cycles (State cycles. CPU cycle Also known as the machine cycle, the CPU cycle is defined as the shortest time for reading a script from the memory. A command cycle is usually composed of several CPU cycles. Status cycle In the 8051 microcontroller, a clock cycle is defined as a cycle (expressed by P), and two beats are defined as a state cycle