68hc11 microcontroller

compatibility with existing arm solutions. Thumb-2 technology uses 31% less memory than pure 32-bit code, reducing system overhead. At the same time, it can provide 38% higher performance than the existing thumb-based solutions. The armv7 architecture also uses neon technology, which improves DSP and media processing capabilities by nearly four times and supports improved floating-point operations, meet the needs of the next generation of 3D graphics, game physical applications, and traditional

Recently, I am working on the low power consumption of the PIC microcontroller. So I set different I/O port States to test the power consumption. The current is measured using a series multimeter. the I/O port of the microcontroller is suspended, the entire system is not driven by peripherals, and the test uses the pic16f690 microcontroller. The idea is as fol

", command=close)theButton2.pack()frame1.pack(padx=10, pady=10)frame2.pack(padx=10, pady=10)mainloop()This is what happens after you run it.is not particularly shabby, hahaha, I just started to learn today. Let's see.Basically is the point to open, to the serial port to send data ' 1 ', point Open, to the serial port to send data ' 2 '. The next machine microcontroller inside will be the ' 1 ' and ' 2 ' to identify, remember Oh, this is the characters

slower BAUD rate (or a single 0xFF byte which only have the start bit low) and if it works. We had a problem using 115K2 baud rate where we microcontroller communicating with the RPi could hits 113636baud or 119047 Baud. 113636baud had the lowest error margin so we used it and TX from the RPi being received by the microcontroller worked fine . However when transmitting to the RPi is ever received. Changing

the loaded program no longer exist, here is called the jump is sometimes referred to as the run to the loaded program.3) boot loader is usually written in combination with a compilation and a C program, but the BIOS is often written in a compilation to save program space.Let's take a look at what the boot loader will do during the boot process. Before we discuss this, we need to understand what the difference between the processor of the embedded system and our computer processor is. For the pr

following example: Old Code: long factorial (int i) { if (i = = 0) return 1; Else return I * factorial (i-1); } New Code: static long factorial_table[] = {1, 1, 2, 6, +, 720 * * etc * *}; long factorial (int i) { return factorial_table[i]; } If the table is large and hard to write, write an init function that temporarily generates a table outside of the loop. (2), to find the remainder of the operation a=a%8; Can be changed to: a=a7; Note: bit operations need only a single instruction cycle to

format, eliminating the interference of byte order.Why can Java cross-platform? Because bytecode is run on a virtual machine, not the compiler. In other words, because the JVM can be installed across platforms, the corresponding Java bytecode can then be run on any platform. As long as the JVM's own code can run on the appropriate platform, that is, the JVM is viable, then Java programmers can take care not to think about where the program is written, but to run it on the virtual machine and th

Eclipse+cdt+yagarto+j-li; Open source development environment setup and commissioning; Chongqing e-mail: [Email protected] ; Document version: V1.0; release date: 2014-08-04; This document is based on the LGPL protocol, which is published on the basis of open source, because of the small information on the online open source MCU and microcontroller development platform, it is because of the keiluvision development environment of ARM company. ; Because

datasheet, which is the syntax of their dialogue, to hold the DS18B20, the core is in the timing diagram.Take Ds18b20 's write timing as an example to describe this dialog process: when our microcontroller (master chip) want to DS18B20 perform tasks must tell him the task, this task is issued by the command, the microcontroller first pull low and ds18b20 connected to the IO port level and then continue 15u

: Increase test caseRequirement Three: Find the smallest element that divides each subset and print out the outputRequirement four: March 29 Lab-Class hand bookHttp://www.daixie0.com/contents/13/1309.htmlOur Direction field: Window Programming numerical algorithm AI Artificial Intelligence financial statistical Metrology analysis Big Data network programming Web programming Communication Programming game Programming Multimedia Linux plug-in programming API image processing embedded/

switching volume, such as whether the Reading Display board has a button press, water flow switch state. 0x03: read one or more hold registers, such as reading one or more setting parameters 0x010: Write one or more hold registers, such as write set parameters 0x06: Write a single hold register, such as write a single set parameter 0x04: read one or more input registers, such as reading specific key values, ad-collected information, etc. Modbus protocol function codes and FAQs Pasted from

Basic principles and practice of Linux C programming (2018-06-16-19:12:15)Basic principles and practice of Linux C language programmingEfficient learning with Purpose: what to do and how to use itRe-knowledge of C language C language is a universal, process-oriented programming language, which is widely used in the development of system and application software. is a way of communication between humans and computers. ANSI C: Is the standard of C language, in order to avoid the d

The so-called signal (Singal), in my understanding, in fact, and microcontroller development in the same as the interruption, but it is not provided by the system hardware, but the software operating system support a reminder mechanism.The processing method after receiving the signal, generally consists of three kinds:(1) The first is similar to the interrupt handler function, and for the signal to be processed, the process specifies a handler functio

net and media folders.Accessibility-These drivers provide support for some assistive devices. In Linux 3.9.4, only one driver in this folder is the Braille device driver.ACPI-Advanced Configuration and Power Interface (acpi:advanced configuration and Power Interface) drivers are used to manage power usage.Amba-Advanced Microcontroller Bus architecture (amba:advanced microcontroller bus Architecture) is a p

story,JVMcreated a new platform for allJavaThe program can only run on this platform, andCand theC + +code can be run on dozens of different platforms, from a source point of view,Cand theC + +is cross-platform, andJavaNo, No. The source code described here has been written and never compiled. So look at this.Javacross-platform is not really a little chicken? This argument is also biased, because Java and C are different in the direction, so the responsibility of cross-platform is different,C i

following figure is a socket relay module, the main function is used for switch sockets, the specific device is y14f-ss-105lmw-115 The following figure is a metering module for recording the use of electricity, the specific device is ATT7021CU From the use of these several modules, basically we are able to identify some associations, microcontroller is the core of the control center, the management of WiFi modules for networking and communicati

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.

bunch of crap is in front of you, and here's a little bit of something useful:① we choose the controller is Arduino Due. Because using it to develop simple and convenient fast, and clock frequency 84Mhz, compared to the ordinary stm32f1 is not inferior. Originally wanted to use the raspberry pie, but the idea of using raspberry pie may be illegal, so still forget.The ② camera chooses the Pixy. Using Pixy image recognition sensor to detect small ball position coordinates. Pixy supports multiple

while (1) is used in single chip microcomputer, while (1); Meaning: This is a dead loop, and the code no longer executes downward. Application: 1. Generally in debugging code, in order to detect a part of the code is OK, to prevent the subsequent code interference execution results, will be in the observation point plus while (1); 2. Some code detects a run error, throws an error (printing, setting the error code), and then enters while (1); 3. when the machine needs to be reset, stop feeding t

Question: Send a 0-255 in 16 of any number, when the microcontroller received after the dynamic display on the digital tube, the baud rate is self-determined. #include Question: Send any byte data from the computer in 9600bps, when the microcontroller receives the data, add a sequence number before this data and send it together with this data to the computer, when the serial number exceeds 255 zero. #in