Flash content protection for LPC824

In this article, I would like to discuss about evaluation of LPC824 low cost 32-bit ARM Cortex-M0 microcontroller using OM13071 LPCXpresso824-MAX Development board. LPC824M201JHI33 is used in the board. Its size is only 5 x 5 x 0.85 mm in HVQFN package.

In order to evaluate it, MCUXpresso Integrated Development Environment (IDE) is downloaded and installed. Other tools for it can be found at this link . After launching MCUXpresso and assigning a workspace folder, example projects can be imported by clicking Quick Start Panel (near bottom left corner) -> Import projects from file system ... -> Browse LPC open resources as shown in the following figure.

Programming serial port in C++ for Windows, Mac and Linux

I have developed a class library 'ceSerial.h' to use serial port (com port) on Windows, Mac and Linux. This cross-platform 'ceSerial' class is written in C++ and we just need to include "ceSerial.h" in your source code in order to use it. A simple example for C++ console program using the class is demonstrated. The source code can be found at

https://github.com/yan9a/serial

Figure. A wxWidgets GUI application using 'Serial' class with Visual Studio 2017

Geometric Center of Myanmar

I have written a program to find the centroid of Myanmar. The centroid is found to be at latitude 20.86 degree and longitude 96.48 degree after compensation for Mercator projection.

Source code: https://github.com/yan9a/cecv/tree/master/MyanmarCentroid

Document: Section 5.4 of https://yan9a.github.io/cecv/opencv.pdf

Real-time Face Detection

Source: https://github.com/yan9a/Real-time_Face_Detection

Document: https://yan9a.github.io/OpenCV_Projects/opencv320.pdf

OpenCV 3.2 / 3.3 on Windows 10 - 64 bit Using Visual Studio 2015 / 2017

Using the latest version OpenCV (currently opencv-3.2.0) pre-built for 64 bit Windows with Visual Studio 2015 is discussed. The procedure is also applicable for OpenCV 3.3 and Visual Studio 2017. OpenCV is available to download at
https://sourceforge.net/projects/opencvlibrary/files/opencv-win/.
Then, the downloaded file, opencv-3.2.0-vc14.exe is extracted at C:\opencv as a folder called opencv320. Visual Studio 2015 IDE is downloaded from https://www.visualstudio.com/downloads/ and install. The following steps are tested on Windows 10 64 bit using Visual Studio 2015 and OpenCV-3.2.0. For other versions, the precedures are similar.

At first OPENCV_DIR is declared as an enviroment variable. Run 'Command window' in administrator mode by right clicking start menu and choosing command prompt (admin). Enter

setx -m OPENCV_DIR C:\opencv\opencv320\build\x64\vc14

A LaTeX Report Template for Myanmar Language Using XeTeX

This is a template for LaTeX report in Myanmar language using XeLaTeX. It is available at

https://github.com/yan9a/LaTeX_Myanmar_Language.

To properly render Myanmar fonts using LaTeX, it is necessary to use TeX typesetting engines that support Unicode such as XeTeX. Simple examples for testing XeTex can be found in an older post Myanmar (Burmese) Language with XeTeX and LuaTeX.

Integration of Accelerometers

We have several 3-axis accelerometers attached to a rigid body at arbitrary positions. The rigid body is moving at arbitrary linear and angular movements, but the accelerometers can only sense linear accelerations. Consequently, the information about angular movements of the rigid body is not available.

A question is whether it is possible to integrate them to get an equivalent accelerometer without using angular movement information.
After consideration, I think the answer for that question is 'YES'.

Creating Dynamic Link Library (DLL) in C++ and Using it in Visual Basic .NET

I need to create a DLL (Dynamic Link Library) to be used in Visual Basic .NET 2012 (vs11). And I want to write the DLL in C++. Two different ways to accomplish the task are discussed below.

CLR Class Library

Win32 DLL

LaTeX Template for Thesis

Here is a LaTeX template for thesis writing.
It is available at
https://github.com/yan9a/LaTeX_Template_Thesis.

TFT LCD Touch Screen - ILI9341

I tested a 2.4 inch 240 x 320 resolution TFT LCD touch screen bought from Aliexpress.

That module has LCD display, touch input, and SD card reader. I have written some example programs to use that module and they are available at the following link.
https://github.com/yan9a/cearduino/tree/master/tft_lcd_touch