mcu 8051

) 0x46 0xb9 Sign (1) 0x6a PC-> MCU 0x68 MCu-> PC Reserve (1) 0x00 Length (1) 0x0c = head + sign + reserve + Length + frame + Data Frame (1) 0x8f and 0x8e indicate different operations Data (X) Checksum (1) 0x77 the addition of the first byte from head to checksum, plus 1, to take 8 bits; Trail (1) 0x16 3. Communication Synchronization ISP: 46 B9 6a 00 0C 80 02 00 36 01 F1 10 30 16 IAP: 46 B9 68 00 06 80 EE

, AES plus decryption, tea plus decryption, base64 codec, json-c language implementation.2440/6410/ARM9/ARM11 Technical Exchange Embedded ARM9, Arm11+linux, WinCE Technology Exchange Group 32475366851MCU Technical Exchange/Board supply and demand group 518603015, explore the ATMEL89C51, c8051f SCM development experience, 51 SCM Supply and demand transactionsSTM32 Technical Exchange/second-hand Development Board supply and demand Information Group 227043677Pic Exchange/second-hand Development Boa

Recently, a pic ultra-low power project has been done with very high power requirements. I have seen some articles on the internet before, but it is not good to test them.Here to summarize, to share a bit for the peer, software programming to pay attention to the following points,1, no module to closeThe module here is not only the enable bit, but PMD2, do not use the IO port to be placed into the outputHere and other articles on the internet say the input is not the same, measured down my side

% 10]; // digital display, single-digitSmg_buffer [1] = SMG [Shijian/10% 10]; // ten} // Timer ConfigurationVoid config_interruptime0 (){Tmod = tmod 0xf0;Tmod = tmod | 0x01;Th0 = 0xfc;Tl0 = 0x66;Ea = 1;Et0 = 1;Tr0 = 1;} Void Init (){Addr3 = 1;Enled1 = 0;}Int main (){Init ();Config_interruptime0 ();While (1){If (k = 1) // check whether the 1-second scheduled time has been reached{K = 0; // K ResetSmg_display (); // refresh the display}}Return 0;} Void interruptime0 () interrupt 1{Static unsigne

The serial port has two buffer registers, sbuf. One is the sending register and the other is the receiving register, which are completely independent in the physical structure. They are all byte addressing registers, and the byte addresses are all 99 H. This overlapping address is differentiated by read/write commands: During serial sending, the CPU writes data to sbuf, and at this time, 99h indicates sending sbuf; During serial receiving, the CPU reads data from sbuf, at this time, 99h indicate

usually choose the direct plug-in dip-40 encapsulation microcontroller for learning (if not specified in the following article, single-Chip Microcomputer refers to the directly inserted package of FIG ). Other chips may also use the same encapsulation as single-chip microcomputer. For example, the ISD4004 voice chip is often packaged with a wide dip-40. When recognizing a chip, you only need to look at the printed letter. How should I identify so many integrated circuits with so many pins? For

/************************************** Serial Communication Experiment* Oscillator 11.0592 MHz* Baud rate 9600bps* Interrupt mode implementation: the microcontroller receives computer data and sends it back to the computer after adding 1***************************************/ # Include Unsigned char dat; *******************/Void uart_config (unsigned long Baud, CY) // baud rate, Cy Crystal Oscillator{Tmod = 0x20; // The timer 1 working mode. The default value is.Th1 = 256-(CY/(12*32 * baud ));

MCU simulation SPI interface-deep understanding of SPI bus protocol SPI (serial peripheral interfacer serial peripheral interface) is a synchronous serial communication interface launched by Motorola, the serial connection between the microprocessor compaction controller and the peripheral extended chip has developed into an industrial standard. Currently, various semiconductor companies have released a large number of chips with SPI interfaces with v

Application of MCU interruption51 Single Chip Microcomputer: P3.2 pin INT0 interrupt P3.3 pin INT1 interrupt button P3.2 P3.3 button Low Level Trigger: While (PB0 = 0); delay (); # include

of the main program{If (time0 = 50) // judge time0. If the value of time0 is 50, it indicates that 50 interruptions have been performed (from the scheduled time of 1 second){Time0 = 0; // reset time0 and re-timerLed2 = ~ Led2; // led2 is reversed once every 1 second to enable 1 second of flashing.}}Return 0;} Void et0 () interrupt 1{Th0 = 0xb8; tl0 = 0x00; // if it can be interrupted, it indicates that the time has reached 20 ms, so the initial value of the reloadTime0 ++; // every time an inte

Label: Serial Communication single-chip microcomputer query method programming how to receive data from computer single-chip microcomputer how to receive data from computer How can I use a computer to send data to a single-chip computer and how can the single-chip computer receive data? Jp3 is connected to P0 port. Send a hexadecimal data from the computer to the microcontroller, and then view the digital display. # Include While (1) {// query the RI value. If it is 1, the data is recei

English letters, but capital letters generally have special meaning.3. Embedded C Strictly distinguishes the case of letters, that is, ABC, ABC, ABC is 3 different names, and assembly language is not case-sensitive, but capital letters generally have special meaning.4. Embedded C does not use line numbers, one line can write multiple statements, but each statement must finally have a ";" As the end, and the assembly language line is a statement.5. Embedded c Each individual complete program uni

In this tutorial, we will study the programming method of MSP430 MCU Gpio. This article also applies to the MSP430X2XX devices used on the Launchpad Development Board, such as msp430g2553, msp430g2231, etc. Most pins on the MSP430 microcontroller are grouped into up to 8 ports, P1 to P8. Each port is 8-bit wide and has 8 related I/O pins. These pins are mapped directly to the appropriate port registers, so the I/O pins can be operated independently. O

Stc12c2052 download the program. In this regard, I was a cainiao. I read du Yang's book and ran to Xi Si, and switched the electronic market again. I didn't find stc12c2052, A boss suggested that I buy a 51 series of 89C2051, saying that the functions should be similar. The shopkeeper pushed me out of his pocket and went back to the Internet to check it. Then I ran to Zhongguancun and bought stc12c2052 on the first floor. Then I bought a USB-to-serial cable for 12 yuan. Go home and follow the st

SCM PIN, can be controlled by the program, output high, low level, these can be considered as the output voltage of the microcontroller.However, the output current of MCU is not controlled. The output current of the microcontroller is largely dependent on the external device on the PIN.Single-chip microcomputer output low-level, will allow the external device, to the single-chip microcomputer pin into the current, this current, called "Sink current",

Atmega169 tqfp package mainly has the following models: ATmega169V-8AU, ATmega169V-8AI, ATmega169-16AU, ATmega169-16AI. Model ID description:(1) The difference between "V" and "V": the voltage range supported by "V" is 1.8-5.5 V. If "v" is not provided, the supported voltage range is 2.7-5.5 V.(2) The numeric part of the suffix represents the maximum system clock that MCU can support, such as ATmega169V-8AU and ATmega169V-8AI refers to the system clo

MCU entry guide series () This article by purplesword (jzj1993) original, reproduced please indicate the original web site http://blog.csdn.net/jzj1993 I started to contact single-chip microcomputer when I was in college. At that time, I took a lot of detours and took a lot of time to finally fully understand and master the single-chip microcomputer. In retrospect, I have gone through a lot from being unconceptual about many things to understanding

Take the simulation SPIs as an example:For other peripherals (UART, SPIM, I2s, i²c ... ) is a truth.When the MCU is written: write primarily to a register, which is the entrance to the peripheral (which is basically done and the logic is turned).Spis_tx_data = (i++);Otherwise the MCU will not initiate write operations, the corresponding enable signal will not be some, the address is.When the

For the tcp ip protocol stack, we have already talked a lot about its principles. However, the principle is not enough. In this regard, we will give you an actual operation example to explain, first, let's take a look at the TCP/IP protocol stack for single-chip microcomputer that runs on single-chip microcomputer. As there are more and more embedded networking devices, we need to implement the TCP/IP protocol stack on embedded devices, however, embedded devices are different from PCs, and gener

withA/D,D/A, such asIntelCompany's8098series and so on. Generally speaking, monolithic microcomputer generally has the following characteristics. • Ability to handle bits.• Predictable execution cycle.• Specializes in interrupt handling, especially for external asynchronous events.• Rich I/0 function. • Low price for easy development.SCM After many years of development, the development of a complete environment, the development of tools, the application of a large number of talent, adequate res