Anglicky v odborných předmětech " Support of teaching technical subjects in English“

1. Anglicky v odborných předmětech"Support of teaching technical subjects in English“ Training program: Mechanic - electrotechnician Program name: Digital processing - microprocessors III. class Microcontrollers Elaborated by: Vlastimil Vlček Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

2. Project setup for Microchip ICD-2 This setup is valid for all tasks and exercises stated hereinafter. • Create a new project (use Project Wizard) with the following setup: • PIC16F883 microcontroller. • Microchip MPASM Toolsuit (check the correctness of paths to the files). • Enter the project name and the path to the place of saving. • Insert the source file. • Check and confirm the correctness of the assignment. • Save the project.

3. Project setup for Microchip ICD-2 • Connect the MPLAB ICD-2 debugger to the USB port of the computer • Check (in the PC device manager) whether the device was installed correctly. • Connect an instruction board to the ICD-2 and connect the supply voltage of 9V to the instruction board. • In the MPLAB-IDE program, select the MPLAB ICD-2 mode.

4. Project setup for Microchip ICD-2 • In the Debugger/Settings menu, check: • Connect Status (Connected) • Self Test (PASS) • Power (presence of supply voltages) • Item “Power target circuit from MPLAB-ICD2” (Power) = inactive • Item “Program after successful build” (Program 2) = active • Item “Run after successful program” (Program 2) = inactive

5. Project setup for Microchip ICD-2 • Set up the configuration bits in this way: • Oscillator Selection bits - XT oscillator • Watchdog Timer Enable bit - WDT disabled • Power-up Timer Enable bit - PWRT enabled • RE3/MCLR pin function select bit - RE3/MCLR pin function is MCLR • Program memory code protection - disabled • Data memory code protection - disabled • Brown Out Reset Selection bits - disabled • Fail-Safe Clock Monitor Enabled bit - disabled • Low Voltage Programming Enable bit RB3 - digital I/O • Brown-out Reset Selection bit = 2.1V • Flash Program Memory Self Write Enable bits - off

6. Project setup for Microchip ICD-2 • TheMPLAB-IDE enables the setup of the configuration bits in two ways: • By inserting the configuration word into the source text by means of the __CONFIG (e.g. _CONFIG 0xC1E0) directive • By setting up the individual configuration bits in the table (Configure Configuration bits) • It is necessary to indicate/ not to indicate the selected method in the left upper corner of the table of configuration bits

7. Project setup for Microchip ICD-2 • Display the source text • Activate the “Output” window • Activate the “Watch” window • Arrange all windows suitably on the desktop • Save the desktop setup • Save the project

8. Summary of the subject matter - exercises • How do you find out whether the USB device of the ICD-2 was installed correctly? • Can an instruction board be supplied from the ICD-2? • During the work with the ICD-2, is it necessary for theoscillator of the microcontroller to work on the instruction board? • What is the principle of the activity of the “In Circuit Debugger (ICD)” mode? Whereis its advantage?

9. Summary of the subject matter - exercises • What is the use of so-called “configuration bits”? Is it always necessary to use them, or can we, in some cases, do without them? • Where do we find the meaning and function of individual configuration bits? • What purpose does the “Code protection” function serve? • What is the function of the “Watchdog timer” in a microcontroller?

10. References • DatasheetMicrochip PIC16F882/883/884/886/887 DS41291E (http://www.microchip.com) • Microchip.com: GettingStartedwithPICmicroMCUs • Microchip.com: MPLAB IDE User’s Guide • Microchip.com: QuickGuide to MicrochipDevelopmentTools