Tag archives for MPLAB X
This is a Getting Started with MPLAB X IDE and XC8 compiler tutorial. MPLAB® X IDE is the new Microchip IDE and it runs on a PC with Windows®, Mac OS® or Linux® to develop applications for PIC microcontrollers and replaces all MPLAB® C and HI-TECH compilers. XC8 is the new C compiler for PIC10, PIC12, PIC14, PIC16 and PIC18 microcontrollers. Learn how to start a new project with MPLAB X IDE, configure your PIC fuses and oscillator, write a simple Blink LED code and simulate the code with Proteus.
An LED is a semiconductor light source, when forward biased, it emits light. LEDs are used mainly to indicate the status of electronic circuits, for example to indicate that power is on or off but nowadays they are used in many applications including lighting and beam detection. In this article we will learn how to connect and switch on and off various LEDs to a microcontroller using XC8 Compiler. This is the simplest project a beginner in embedded programming can start with before attempting any complex projects as we have learned from the Introduction to XC8 Compiler article.
In any electronic products or projects there is always a source of power for the system to work. This is called a power supply. The source of this power can come from different sources like the mains AC voltage, a battery or even from a renewable power source like a solar panel wind turbine or fuel cell to name just a few. The most common source of power is usually the mains AC, with this power, we need a transformer to convert the 220V 50Hz mains or the 120V 60Hz if you are living in the United States of America to a lower voltage required by the electronic circuit, this can be typically between 6V and 12V when 5V regulated DC is needed. In this article we are going to design a simple 5V DC power supply using the 7805 voltage regulator.
For many hobbyists and students interested in programming PIC Microcontrollers, the high cost of a programmer can really be a huge obstacle. The programmer described in this article is very easy and cheap to build. It can cost you less than R 100 ($10) to build it and all the software used to program the PIC luckily are also free. You can use MPLAB X IDE with XC8, XC16 or XC32 compilers from Microchip Technology Inc that can be used to write and debug code for a PIC Microcontroller. You can download a free copy of MPLAB® X IDE and XC8 Compiler from Microchip website. They are also other compilers that you can use depending on your preference, like Mikroelekronika compilers where you can download a free 2Kb limited demo compiler on their website.
LCDs are alphanumeric (or graphical) displays, which are frequently used in microcontroller based applications which require some information to be displayed to the user. There are many devices in the market which come in different shapes and sizes. Some LCDs have 40 or more character lengths with the capability to display several lines. Some other LCD displays can be programmed to display graphic images. Some modules offer color displays, while some others incorporate back lighting so that they can be viewed in dimly lit conditions. In this tutorial we will learn how to connect an LCD to any PORT of a microcontroller, display characters and send commands to LCD using lcd library with MPLAB Code Configurator and PIC18F Peripheral Libraries.
Analog to Digital converters allow analog continuous voltages to be converted into a discreet digital numbers inside the PIC as the PIC can only process digital numbers. This can enable a PIC to be connected to analog sensors such as temperature sensors, pressure sensors, humidity sensors, optical sensors, and power sensors. Any sensor which can generate a voltage between 0V and a maximum 5V can be used. If the output voltage is higher than 5V, a method to step it down should be used such as a voltage divider with resistors.
Temperature sensors are very important in many projects especially in temperature logging devices and alarms. In this article we are going to design a digital thermometer using MPLAB XC8 compiler. This digital thermometer is built around the LM35 which is a precision integrated-circuit temperature sensor whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. Its output changes by 10 mV per °C so there is no need for calibration. It can measure a wide range of temperature from −55 to +150°C
RS232 serial communication is one of the oldest communication where data is sent or received one bit at a time. This protocol can easily be used to communicate between a PC and various devices supporting this type of protocol like PIC microcontrollers, GPS, GSM modem etc. While other interfaces like Ethernet, FireWire, and USB all send data as a serial stream, the term "serial port" usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with a modem or with a similar communication device. The Universal Asynchronous Receiver/Transmitter (UART) controller is the key component of the serial communications between a device and a PC or between devices. UART is also a common integrated feature in most microcontrollers today which is useful for communicating serial data (text, numbers, etc.) to your PC. In this article we're going to learn how to use the RS232 communication with MPLAB XC8 Compiler using the PIC18F Peripheral Library and MPLAB Code Configurator.
The I²C or Inter-Integrated Circuit is a serial communication and allows multiple devices to communicate with a micocontroller(s) over only two wires. The devices don't have to be identical as long as they support I²C protocol. In our illustration, the first device with address 1 is a digital temperature sensor, the second one is a real time clock and the third one is a serial LCD display and the bus could carry on even more devices. Communication takes place from the master (PIC) to the individual selected slave only as shown in this illustration. Configuration with PIC18F Peripheral Libraries and MPLAB Code Configurator are discussed in this article