Monday , January 23 2017

Arduino

Servo Motor Interface – Looking behind Arduino’s Servo library

Servo Motor Interface

Have you ever looked into the Arduino’s source files? Well you should be!! I have been hanging around there for quite some time now. The Arduino’s Servo class has half a dozen functions to handle all the servo related tasks like the attach(), read(), write() and detach(). There was too much of AVR specific stuffs in there so I did not go very deep in to the code but looking at it helped me derive my own theories on how I have …

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Arduino Like Serial / UART Library for PIC 18 Microcontrollers

PIC with serial port

In my last post describing the implementation of a circular buffer I mentioned that I was working on a serial UART library for PIC 18. Well it is now completed! Yesterday I tested all the functions of the library and its working like a charm! In this post I will explain some key aspects of the code and how to download and use it in your code. What is UART? Universal Asynchronous Receiver and Transmitter is a serial communication protocol. …

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Workaround for “SD Card Initialization Failed!” in Arduino

Arduino sd card

I was working on a project that involved the use of a SD (Secure Digital) card to log data into a text file. I chose Arduino as it  had a vary stable FAT (File Allocation Table) library. I had an Arduino Mega at my disposal and built a resistive network to step down the logic levels of the Arduino SPI bus at 5v to the SD card’s at 3v3. I was getting voltage levels that were withing the absolute maximum …

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Engineers! are you starting embedded systems with arduino?

Arduino

The term ‘Arduino‘ is no longer new to anyone having the least bit of exposure to Embedded System. Some years ago when I first heard Arduino, it hadn’t come into India yet and the only shops selling them we charging a little more than twice the actual cost. So I was inclined to believe that it was yet another fancy toy for those with some good monthly allowances or for those with the financial support from some university (in today’s terms, telosB motes serves …

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