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Materials
Circuit
1. Pin RB7 to resistor
2. Resistor to LED
3. LED to ground
Code
//all these # below set
up the PIC
#include <16F877A.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //Highspeed Osc > 4mhz
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18)
used for I/O
#FUSES NOCPD //No EE protection
#use delay(clock=20000000) // Sets crystal oscillator at 20
megahertz
#use rs232(baud=9600, xmit=PIN_C6, invert) //Sets up serial port
output pin & baud rate
//main program starts here
void main() {
//Infinite program loop starts. LED blinks forever.
while(true){
output_high(PIN_B7);
//send a “1” to pin RB7, making RB7 “High” at 5v
//this will turn on the LED hooked to RB7
delay_ms(500);
//wait half a second, delays for 500ms
output_low(PIN_B7);
//send a “0” to pin RB7, making RB7 “Low” at 0v
delay_ms(500);
//wait half a second, delays for 500ms
}
}
Notes You can easily add more LEDs and make them flash in different
patterns.
For more readable code, use
#define RED_LED PIN_B7
#define GREEN_LED PIN_B6
…
…
output_high(RED_LED);
output_high(GREEN_LED); |
