Getting started with PIC18F Microcontrollers
So what is StartUSB for PIC?
StartUSB for PIC is a small development board featuring PIC18F2550 microcontroller with fast USB 2.0 support. It features connection pads for all MCU pins, as well as two additional prototyping areas for placing additional components. The biggest advantage of this board is that the microcontroller comes preprogrammed with fast USB bootloader, and so there is no need of any external programmer. You can transfer your application related HEX file from PC to PIC’s program memory using mikroBootloader. MikroBootloader is the PC application developed by mikroElektronika for their USB HID Bootloader. On board miniUSB connector, oscillator (8.0 MHz crystal), reset circuit, power indicator LED, as well as two additional LEDs provide all you need for quick start. The two additional LEDs are connected to RA1 and RB1 pins of PIC18F2550 through jumpers. The picture above shows the StartUSB for PIC board with all the components and additional prototyping areas.
Today’s tutorial is important because we will discuss about a complete setup for StartUSB for PIC board that will let you start your journey into the world of PIC18F series microcontrollers. The first thing you need to install is mikroC Pro for PIC, which is a C compiler developed by mikroElektronika for PIC12, PIC16, and PIC18 series microcontrollers. You can download the demo version of this software that will allow you to compile programs up to 2 K of program words. Once you installed the compiler, download the mikroBootloader, which is PC’s application to communicate with the bootloader program stored inside the PIC18F2550 microcontroller on the StartUSB board.
Testing the board with “Hello World”
We will begin our journey with a simple test program that will make sure everything is setup correctly and we will be ready for doing more advanced experiments with PIC18F2550. This program will flash the two on-board LEDs (connected to RA1 and RB1 pins) alternately with 500 ms duration. In mikroC Pro for PIC, applications are developed in the form of projects. If you haven’t used mikroC Pro for PIC before, the document ‘Creating first project in mikroC Pro for PIC‘ from mikroElektronika will guide you to create your first project. While following those steps, select the microcontroller as PIC18F2550 and the device clock as 8.0 MHz. In the main program window, type in the following program.
For more detail: Getting started with PIC18F Microcontrollers
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