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Embedded Systems

Are you reading the datasheet? What to look for and how to find them!

datasheet

Did you know that experienced engineers spend up to an hour on every major component that they are going to be using for upcoming projects? Project as in, real commercial work involving a lot of money and man hour.. not just some hobby project. When a component is being purchased with a commercial venture in mind, lot of thinking has to be done in various aspects such as the cost, the suitability of the device, the life expectancy, and sustainability of …

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Graphic LCD: GLCD Command Sheet HTML Version

Yet again I was looking for the GLCD command sheet in the internet and failed find any good resolution images that I can use for post references. Even the one of the data sheet looks really bad. So here I am with a HTML Version of the GLCD command sheet just like the one for the character LCD I posted a while back.   GLCD Command Sheet Instruction Code Description RS RW D7 D6 D5 D4 D3 D2 D1 D0 Display On/OFF …

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Getting Started with PIC Microcontrollers

Having worked with any one Microcontroller, moving from one of its family to another is  just a matter of matter knowing the right tools and understanding how things have to be done in terms of software (compiler specific addressing like that of the SRFs) and hardware (circuitry, design practices, etc., ) In this post we will have a look at everything you will need while getting started with PIC microcontrollers. Thing you will need, Here is a very small list …

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PIC Timer Calculator : giveAway#1

Timers are one of the mostly used modules in microcontroller. Almost every system that has to be reliably produce time interval or delays will have to use timers modules. The PIC timer calculator is a cool tool will make life much simple. If you haven’t worked with timers, I suggest you read about the timer/counter module in microcontrollers in general and then move on to read about the ones on PIC micros. PIC Timer Calculator! I found this great GUI …

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Cool C Programming Tricks For Embedded Software Developers

Proficiency in C is an essential skill set for embedded software developers. In this post we will see some really cool C programming tricks that you should have already known. If you didn’t, it’s time to take a pen and paper. Be warned this is just a small collection of routines that will help embedded software developers write better code. Of course I have listed only those that came to my mind while writing this article and I most probably …

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Interrupt On Change (IOC) in PIC Microcontrollers

The interrupt on change is a cool feature on microcontrollers. Like you guessed, the interrupt occurs when there is a state change in any of the port pin associated with this feature. In PIC microcontrollers, PORT B is has the Interrupt on Change feature. The controller jumps into the interrupt vector when there is a change in the state of any of the pins in the port. In my previous post on interfacing matrix keypad, we used the conventional polling …

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Migrating to HI-TECH C Compiler from the Microchip C18 Compiler

Migrating to HI-TECH C compiler for PIC MCU is not really hard task. The developers have taken much care in keeping it that way. In addition to the existing features of the C18 compiler, there are a lot of other added features in the HI-TECH C compiler. This post will give you an introduction to the compiler, its features and how to write C programs in it. This compiler can be used to program all 8 bit PIC MCUs. There is …

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Interface 4×4 Matrix Keypad With Microcontroller

In this post we will discuss logic and interface of a matrix keypad (4×4 for this post) with microcontroller to reduce the number of port pins required to read a certain number of inputs (digital). The same logic applies to any matrix keypad of order NxN. Where, N is the order of the matrix. Why Matrix Keypad? Typically one port pin is required to read a digital input into the controller. When there are a lot of digital input that has …

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Interface 7 Segment Display with Microcontroller

The 7 segment display is widely used to display numeric data. They are limited by the number of segments (LEDs) they have and hence are not suitable for displaying text. There are some variants of this kind of displays that have 11 segments which enables them to display text also. This post will deal with the basics of 7 segment displays and how to interface them with microcontrollers. As the name suggests, there are 7 segments to display a number …

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Standalone BreadBoard Breakout for PIC Microcontrollers

I wanted to make a breadboard breakout for PIC microcontrollers after seeing this arduino breadboard breakout from adafruit. This product is fully standalone and yet has very small footprint so that it can be conveniently plugged into the breadboard. The most amazing part was that it still had 2 rows on each side of the breadboard for the user to jump wires. First I thought of making a breakout board for the 40 Pin DIP package that I usually use. Then I realized …

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