PIC 16F84A

Picinit for PIC 16F84A

What Picinit ?

Picinit is a free software (GNU General Public License).

Picinit is a utility which is addressed to those which program the PIC 16F84A microcontrollers in assembler language, with Microchip MPLAB IDE.

Picinit defines the initial configuration of a PIC 16F84A microcontroller.

The source code (.asm) corresponding is automatically generated.

This source code is entirely compatible with MPLAB IDE.

Download Picinit version 1.0.4 (for Windows)

        Download the source code (C++ Borland Builder 5.0)

Tutorial

1- How to use Picinit

2- Transfer to MPLAB IDE

1- How to use Picinit

• Step 1

Open Picinit84A_104.exe

Project -> New project

• Step 2 : Fuses

In this project :

• the code protection is disabled
• the watchdog timer is disabled
• the power-up timer is enabled
• the RC oscillator mode is used

• Step 3 : OPTION_REG register

  Note : Picinit determines the PSA, PS2, PS1 and PS0 bits automatically.

• Step 4 : TRISA register

  2 outputs (RA3 and RA4/T0CKI)

  2 inputs (RA0 and RA2)

  RA1 pin is not used.

• Step 5 : Port A outputs levels
  • RA4 = 0 (low level)
  • RA3 = 1 (high level)

• Step 6 : TRISB register

  4 outputs (RB7, RB6, RB2 and RB1)

  3 inputs (RB5, RB4 and RB0/INT)

  RB3 pin is not used.

• Step 7 : Port B outputs levels

   

  • RB7 = 1 (high level)
  • RB6 = 0 (low level)
  • RB2 = 1 (high level)
  • RB1 = 0 (low level)

• Step 8 : Interrupts

• Step 9 : General Purpose Register

This project uses 8 registers.

Note that there are 2 imposed registers (W_TEMP and STATUS_TEMP).

These two registers are assigned to the interrupt routine.

• Step 10 : EEPROM initialization

• Step 11 (last step)

Save project : tutorial104.mcq file

2- Transfer to Microchip MPLAB IDE

a) Open MPLAB IDE

b) Project->New

c) Configure ->Select Device -> PIC16F84A

d) Project -> Select Language Toolsuite -> Microchip MPASM Toolsuite

e) Debugger -> Select Tool -> MPLAB SIM

f) Project -> Add File to Project (file tutorial104eng.asm creates by Picinit) :

g) The most difficult remainder to be made : write the main program, the subroutines, the interrupt routine ...

Sorry for my poor english ...

(C) Fabrice Sincère ; version 1.1.10