PIC18F46K22

20171117.5

Items:
1  PC    (Windows 7)
2  Internet access
3  PICkit 3 clone  US$ 11.24        
4  PIC18F46K22  US$ 3.60

5  MPLAB X IDE and XC8 from Microchip
6  Breadboard, connectors, LEDs, resistors etc
7  74HC164
8  LCD 1602

Setup:
Read PIC18F46K22 Datasheet

Install MPLAB X IDE and XC8

Insert the PIC18F46K22 microcontroller on the breadboard;

  Make the 5 connections between the microcontroller and the PICkit3:

          (Vdd, Ground, /Mclr, PgC and PgD. Pin 6 is not used. 

            Pull up /MClr with a resistor. Connect an LED with a resistor to ClkO.) 

Connect the PICkit3 to the computer.

Programming: 

Launch the X IDE

Create a standalone project for PIC18F46K22 using PICkit3 and XC8

Customise PICkit3 in the 'Set Configuration' :

     Use low voltage programming in 'Program options'

     Power target circuit from PICkit3 and 4.75 V in 'Power' 

Edit a program and 'Make and Program Device'

Configuration Bits

Go to Window|PIC Memory views|Configuration Bits|

Select the appropriate options

Then 'Generate Source Code to Output'

Copy the required pragma's to the program

Notes on the Examples:

T10          Test X IDE, XC8 and downloading.
T11          Turn on internal oscillator with clockout on ClkO, connected LED will be dimly lighted.

T12          Classical approach: Turn on some LEDs connected to the 8-bit port D.

T14          Changing LED patterns, with software delay.

T22          Timer 2 high-priority interrupt (draft, working)

Examples:

==========

//  T10.c

int main(void){

    while(1);
}

==========

//  T11.c

#pragma config FOSC = INTIO7    // Oscillator Selection bits (Internal oscillator block, CLKOUT function on OSC2)

int main(void){

    while(1);
}

==========

//  T12.c

#include <pic18f46k22.h>
#pragma config FOSC = INTIO7    // Oscillator Selection bits (Internal oscillator block, CLKOUT function on OSC2)

int main(void){
    LATD = 0x53;        // Port D output = 0101 0011 
    TRISD = 0x00;        // Port D all outputs
    while(1);
} 
==========

//  T14.c

#include <pic18f46k22.h>
#pragma config FOSC = INTIO7    // Oscillator Selection bits (Internal oscillator block, CLKOUT function on OSC2)

int main(void){
    int i;
    LATD = 0x53;        // Port D output = 0101 0011 
    TRISD = 0x00;        // Port D all outputs
    while(1){
        for(i=0;i<=1000;i++);
        LATD++;
    }
}

==========

//  T22.c          Timer 2 high-priority interrupt

#include <pic18f46k22.h>
#pragma config FOSC = INTIO7    // Oscillator Selection bits (Internal oscillator block, CLKOUT function on OSC2)
#pragma config WDTEN = OFF      // Watchdog Timer Enable bits (Watch dog timer is always disabled. SWDTEN has no effect.)

int main(void){
    int i;
    LATD = 0x53;        // Port D output = 0101 0011
    TRISD = 0x00;        // Port D all outputs
    T2CON = 0x06 ;      // Timer 2 ON, Prescaler 16
    RCON |= 0x80 ;
    IPR1 |= 0x02 ;
    PIE1 |= 0x02 ;
    PIR1 &= ~(0x02); // clear this interrupt condition
    INTCON |= 0x80 ;
    // ei();
    while(1){
        ;
    }
}
void high_priority interrupt T2ISR(void)
{
// only process timer-triggered interrupts
// if(INTCONbits.TMR0IE && INTCONbits.TMR0IF) {
    LATD++;
    PIR1 &= ~(0x02); // clear this interrupt condition
}

==========