LPC Low pin Count Demo-board (sw)
Experiment med PICkit2 och "Low pin Count Demo" -board
Krets PIC16F690
Low Pin Count User's Guide PICkit 2 Microcontroller Programmer User's Guide
LPC printead circuit board Kontakt J1 LPC ASCII-grafik: 
lpc.txt
Vårt testprogram: Play a melody ...
Kodexempel för PIC16F690:
Hello world! - Tänd en LED
Kodexempel för PIC16F690:
/* helloled.c PICkit 2 Lesson 1 Light up a LED */
/* Low pin count demo board J1
___________ ___________ 1 RA5
| \/ | 2 RA4
+5V---|Vdd 16F690 Vss|---GND 3 RA3
---|RA5 RA0/AN0/(PGD)|-<-RP1 4 RC5
---|RA4 RA1/(PGC)|--- 5 RC4
SW1---|RA3/!MCLR/(Vpp) RA2/INT|--- 6 RC3
---|RC5/CCP RC0|->-DS1 7 RA0
---|RC4 RC1|->-DS2 8 RA1
DS4-<-|RC3 RC2|->-DS3 9 RA2
|RC6 RB4| 10 RC0
|RC7 RB5/Rx| 11 RC1
|RB7/Tx RB6| 12 RC2
|________________________| 13 +5V
14 GND
*/
/* B Knudsen Cc5x C-compiler - not ANSI-C */
#include "16F690.h"
#pragma config |= 0x00D4
void main( void)
{
TRISC.0 = 0;
PORTC.0 = 1;
while(1)
{
nop();
}
}
Blinka med lysdioden!
/* blinkled.c PICkit2 Lesson 2 Blink a LED */
/* Low pin count demo board J1
___________ ___________ 1 RA5
| \/ | 2 RA4
+5V---|Vdd 16F690 Vss|---GND 3 RA3
---|RA5 RA0/AN0/(PGD)|-<-RP1 4 RC5
---|RA4 RA1/(PGC)|--- 5 RC4
SW1---|RA3/!MCLR/(Vpp) RA2/INT|--- 6 RC3
---|RC5/CCP RC0|->-DS1 7 RA0
---|RC4 RC1|->-DS2 8 RA1
DS4-<-|RC3 RC2|->-DS3 9 RA2
|RC6 RB4| 10 RC0
|RC7 RB5/Rx| 11 RC1
|RB7/Tx RB6| 12 RC2
|________________________| 13 +5V
14 GND
*/
/* B Knudsen Cc5x C-compiler - not ANSI-C */
#include "16F690.h"
#pragma config |= 0x00D4
void delay10( char n);
void main( void)
{
TRISC.0 = 0;
while(1)
{
PORTC.0 = 1;
delay10(200);
PORTC.0 = 0;
delay10(200);
}
}
void delay10( char n)
/*
Delays a multiple of 10 milliseconds using the TMR0 timer
Clock : 4 MHz => period T = 0.25 microseconds
1 IS = 1 Instruction Cycle = 1 microsecond
error: 0.16 percent
*/
{
char i;
OPTION = 7;
do {
i = TMR0 + 39; /* 256 microsec * 39 = 10 ms */
while ( i != TMR0)
;
} while ( --n > 0);
}
Rinnande ljus!
/* rotateled.c PICkit2 Lesson 3 Rotate LED light */
/* Low pin count demo board J1
___________ ___________ 1 RA5
| \/ | 2 RA4
+5V---|Vdd 16F690 Vss|---GND 3 RA3
---|RA5 RA0/AN0/(PGD)|-<-RP1 4 RC5
---|RA4 RA1/(PGC)|--- 5 RC4
SW1---|RA3/!MCLR/(Vpp) RA2/INT|--- 6 RC3
---|RC5/CCP RC0|->-DS1 7 RA0
---|RC4 RC1|->-DS2 8 RA1
DS4-<-|RC3 RC2|->-DS3 9 RA2
|RC6 RB4| 10 RC0
|RC7 RB5/Rx| 11 RC1
|RB7/Tx RB6| 12 RC2
|________________________| 13 +5V
14 GND
*/
/* B Knudsen Cc5x C-compiler - not ANSI-C */
#include "16F690.h"
#pragma config |= 0x00D4
void delay10( char n);
void main( void)
{
TRISC = 0;
char led_state = 1;
while(1)
{
Carry = led_state.3;
led_state = rl(led_state);
PORTC = led_state;
delay10(200);
}
}
void delay10( char n)
{
char i; OPTION = 7;
do {
i = TMR0 + 39; /* 256 microsec * 39 = 10 ms */
while ( i != TMR0) ;
} while ( --n > 0);
}
Analoga spänningar - AD-omvandlaren
/* adblink.c PICkit2 Read pot RP1 with AD AN0 and blink LED DS1 */
/* Low pin count demo board J1
___________ ___________ 1 RA5
| \/ | 2 RA4
+5V---|Vdd 16F690 Vss|---GND 3 RA3
---|RA5 RA0/AN0/(PGD)|-<-RP1 4 RC5
---|RA4 RA1/(PGC)|--- 5 RC4
SW1---|RA3/!MCLR/(Vpp) RA2/INT|--- 6 RC3
---|RC5/CCP RC0|->-DS1 7 RA0
---|RC4 RC1|->-DS2 8 RA1
DS4-<-|RC3 RC2|->-DS3 9 RA2
|RC6 RB4| 10 RC0
|RC7 RB5/Rx| 11 RC1
|RB7/Tx RB6| 12 RC2
|________________________| 13 +5V
14 GND
*/
/* B Knudsen Cc5x C-compiler - not ANSI-C */
#include "16F690.h"
#pragma config |= 0x00D4
void delay( char );
void main( void)
{
TRISA.0 = 1;
TRISC.0 = 0;
char time;
bit DS1_led;
/* AD setup */
ANSEL.0 = 1;
ADCON1 = 0b0.001.0000; /* AD conversion clock 'fosc/8' */
/*
0.x.xxxx.x.x ADRESH:ADRESL is 10 bit left justified
x.0.xxxx.x.x Vref is Vdd
x.x.0000.x.x Channel 00 (AN0)
x.x.xxxx.0.x Go/!Done start later
x.x.xxxx.x.1 Enable AD-converter
*/
ADCON0 = 0b0.0.0000.0.1;
while(1)
{
GO=1; /* start AD */
while(GO); /* wait for done */
time = ADRESH; /* only using 8 MSB of ADRES (=ADRESH) */
/* must negate 'time' to increase blink speed */
/* when turning RP1 clockwise */
time = ~time;
DS1_led = !DS1_led; /* toggle DS1 LED-light on/off */
PORTC.0 = DS1_led;
delay(10); /* add a minimum 10 ms delay */
delay(time);
}
}
void delay( char millisec)
{
OPTION = 2; /* prescaler divide by 8 */
do {
TMR0 = 0;
while ( TMR0 < 125) ;
} while ( -- millisec > 0);
}
Prova interrupt!
Kodexempel för 16F690:
/* kilroy.c PICkit2 Test interrupt SW1 and DS1 */
/* "Low pin count demo board" J1
___________ ___________ 1 RA5
| \/ | 2 RA4
+5V---|Vdd 16F690 Vss|---GND 3 RA3 --
---|RA5 RA0/AN0/(PGD)|-<-RP1 4 RC5 |
---|RA4 RA1/(PGC)|--- 5 RC4 | insert
SW1---|RA3/!MCLR/(Vpp) RA2/INT|--- 6 RC3 Resistor 1k
---|RC5/CCP RC0|->-DS1 7 RA0 |
---|RC4 RC1|->-DS2 8 RA1 |
DS4-<-|RC3 RC2|->-DS3 9 RA2 --
|RC6 RB4| 10 RC0
|RC7 RB5/Rx| 11 RC1
|RB7/Tx RB6| 12 RC2
|________________________| 13 +5V
14 GND
*/
/* Insert resistor 1k (value not critical) between J1:3 and J1:9 */
/* for SW1 to be able to generate external interrupt */
/* B Knudsen Cc5x C-compiler - not ANSI-C */
#include "16F690.h"
#include "int16Cxx.h"
#pragma config |= 0x00D4
#pragma origin 4
interrupt int_server( void ) /* the place for the interrupt routine */
{
int_save_registers
if( INTF == 1 ) /* test if it is the INT-interrupt? */
{ /* this time it's obvius that it is! */
PORTC.0 = 1; /* Lightdiode on to show "Killroy was here" */
INTF = 0; /* Reset INT-flag before leaving */
}
int_restore_registers
}
/* include no code before the interrupt routine */
void delay( char);
void main( void)
{
TRISC.0 = 0; /* RC0 is output */
PORTC.0 = 0; /* the LED is off */
delay(10); /* 10 ms for demo board initialization */
/* or uncheck !MCLR after Vdd is checked in PICkit2 */
TRISA.2 = 1; /* INT is input */
ANSEL = 0; /* PORTA dig i/o */
INTEDG = 0; /* interrupt on negative going edge */
/* eg when you press SW1 (it's connected that way) */
INTE = 1; /* local enable */
GIE = 1; /* global enable */
while(1)
{
nop(); /* the LED is still off */
}
}
void delay( char millisec)
{
OPTION = 2; /* prescaler divide by 8 */
do {
TMR0 = 0;
while ( TMR0 < 125) ;
} while ( -- millisec > 0);
}
kilroy.c NOTE! copy the header file int16Cxx.h from the compiler folder to your Work folder.