Developers Club geek daily blog

To a question of timers in OSRV (Outputs)

1 year, 6 months ago
imageIn kratets I will describe contents of article:

There is a cyclic hardware counter which, for example, considers seconds, and there is an interruption on its overflow. We expand notation range with a program method, inkremeniruya value of other cell in interruption. Thus, we have an opportunity to consider and minutes. The essence of a problem is that generally at the same time it is impossible to read value of minutes and seconds, and at consecutive reading there can be an interruption and increase in minutes. Effects: travel in time back.

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Advice to the beginning microcontrollers programmers

1 year, 6 months ago
Long ago there was a wish to share the experience, with the beginning radio fans because write about it very little and separately. My experience not good, not bad, it such what is. With some statements you in the right not to agree and it is normal, at everyone the vision of a situation. The purpose of this material to pay attention of the reader to some things that to note that and to create own opinion and vision of a situation, it is impossible to perceive it as truth at all.

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STM32F4: GNU AS: We blink a LED (Revival) (Part 2)

1 year, 6 months ago
It is the second publication on programming of STM32 microcontrollers in assembler language, the first part is Here.

So, in last article we created the tool by means of which, it is possible to make compilation and configuration (linkovka) of the project in assembler language. Now we will write the program work as which it is possible to watch.

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STM32: GNU AS: Programming on the assembler

1 year, 6 months ago
It is my first article for community Habrakhabr and I decided to write it about what now concerns me: writing of programs for STM32 microcontrollers (ARM family) in assembler language. I use a debug payment on the basis of the STM32F407 microcontroller (STM32F4 Discovery, Open407I-C), but article will be not less useful also to programming of other STM32 microcontrollers.

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Programming of a microcomputer of LEGO NXT Mindstorms 2.0. Introduction

1 year, 6 months ago
Hello. In the articles I want to acquaint you with programming essentials of a microcomputer of LEGO NXT Mindstorms 2.0. For applications programming I will use the Microsoft Robotics Developer Studio 4 platforms (MRDS 4) and National Instruments LabVIEW (NI LabVIEW). Problems of automatic and automated management of mobile robots will be considered and be implemented. We will move from simple to difficult.



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Chaos generators on COTTON VELVET

1 year, 7 months ago
Hi everyone!

This article is devoted to surprising features in the world of chaos. I will try to tell about how to bridle such strange and difficult thing as chaotic process and to learn to create own elementary generators of chaos. Together with you we will pass a way from the dry theory before fine visualization of chaotic processes in space. In particular, on the example of the known chaotic attractors, I will show how to create dynamic systems and to use them in the tasks connected with the programmable logic integrated circuits (PLIC).


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OpenOCD, GDB and (strongly) remote debugging

1 year, 7 months ago
It is given: there is a device, with ARM926E-JS (Cypress FX3) onboard. The device is on other continent. The device is connected (JTAG+USB+COM) to Linux to a computer. On a computer there is SSH access (more than nothing, only SSH port).

Problem: The device needs to be debugged and written under it a code. And to do it, it is desirable, conveniently.

Solution with use of OpenOCD, GDB and Qt Creator, and also the description of a way to it, under a cat.

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The motion sensor for switching of radio stations? part II

2 years, 1 month ago
Hi, Habr! Today? continuation of the improvised cycle of detailed posts for beginners. In last post we have taken ready set of the radio designer about Arduino and ultrasonic range finder in order that not only to combine them, and to have opportunity to configure radio? one left?, but also to understand in? Arduinostroyeniya? from scratch. If you have only Arduino and the sensor, you too can try something to collect from this post, but, probably, stop after configure quite good such ultrasonic ruler? that too it is good. I wanted to go further and to put the sensor on the expansion card for creation of the ready device. Here is how it at me left.


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The free textbook of electronics, computer architecture and low-level programming in Russian

2 years, 1 month ago

Misters! I am glad to report that at last everyone can upload the free textbook on more than 1600 pages on which transfer worked more than fifty people from leading universities, institutes and the companies of Russia, Ukraine, the USA and Great Britain. It was really national project and example of the international cooperation.

David Harris and Sara Harris's textbook? Digital circuit engineering and computer architecture?, the second edition, 2012, reduces together the worlds of the software and the equipment, being at the same time introduction and to development of chips, and to low-level programming for junior students. This textbook exceeds earlier input textbook? Computer architecture and design of computer systems? from David Patterson and John Hennessey, and the coauthor of the previous textbook David Patterson himself recommended the textbook from Harrisov as more advanced. Following the new textbook, students build implementation of subset of architecture of MIPS, using payments with COTTON VELVET / FPGA then compare this implementation to industrial Microchip PIC32 microcontrollers. Thus circuit engineering, languages of the description of the Verilog and VHDL equipment, computer architecture, microarchitecture (the organization of the processor pipeline) and programming on the assembler is entered together? generally everything that is between physics and high-level programming.

How to load? Unfortunately, not one click. Snachalo should be registered in the user community of Imagination Technologies, then to be registered in educational programs on the same site then at last to download:

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The panel for photographing with geotags on the basis of LinkIt One

2 years, 1 month ago
The will of destiny of me into hands fell sample of rather interesting payment of LinkIt One from Mediatek. It is the single board computer with impressive set of the periphery prepared for use in the projects connected with wearable devices and IoT.

To receive? the fighting? experience with this controler we have developed the simple panel which is connected to the SLR camera, does pictures and writes shooting point coordinates.

In this article I will tell about the turned-out device and I will share our impressions of work with LinkIt One.


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