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Rotate LED

 
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Kreg



Joined: 27 Aug 2014
Posts: 2

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Rotate LED
PostPosted: Wed Aug 27, 2014 2:55 am     Reply with quote
Hi all !

I would like to ask a question.
Actually, I have just bought a PICKIT3 with a 18F45K20
I would like to 'flash and rotate' LED.

Can you help me ? I am a beginner.

All my LEDs are connected to the port D (there is 7 LED)

I would like to introduce an array of the form

const int LED_LookupTable[8]={0,1,2,3,4,5,6,7};

Then, sending the led_data in sequence to portD will light each each LED in turn.

Here is my code but it doesn't work :


Code:
/**  I  N  C  L  U  D  E  S  **************************************************/
#include  <18F45K20.h>
#FUSES INTRC_IO,NOWDT,NOLVP
#USE delay (CLOCK=1MHz)



#WORD LATD=0xF8C
#WORD PORTD=0xF83
#BIT led=LATD.0
#BIT led1=LATD.1
#BIT led2=LATD.2
#BIT led3=LATD.3
#BIT led4=LATD.4
#BIT led5=LATD.5
#BIT led6=LATD.6
#BIT led7=LATD.7



const int LED_LookupTable[8]={0,1,2,3,4,5,6,7};



void main(){
   int LED_Number=0;
   SET_TRIS_D(0b00000000);
   led7.LED_LookupTable[LED_Number];
   led7=1;
   LED_Number++;
   
   if(LED_Number==8){
      LED_Number=0;
   }   
   delay_ms(2000);

}


And the error about led7=1;
Quote:
Expecting a structure/union


How can I fix that ?

Thanks
Kreg



Joined: 27 Aug 2014
Posts: 2

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PostPosted: Wed Aug 27, 2014 3:06 am     Reply with quote
Code:
/**  I  N  C  L  U  D  E  S  **************************************************/
#include  <18F45K20.h>
#FUSES INTRC_IO,NOWDT,NOLVP
#USE delay (CLOCK=1MHz)



#WORD LATD=0xF8C
#WORD PORTD=0xF83
#BIT led=LATD.0
#BIT led1=LATD.1
#BIT led2=LATD.2
#BIT led3=LATD.3
#BIT led4=LATD.4
#BIT led5=LATD.5
#BIT led6=LATD.6
#BIT led7=LATD.7



const int LED_LookupTable[8]={0,1,2,3,4,5,6,7};



void main(){
   LATD=0;
   int LED_Number=0;
   SET_TRIS_D(0b00000000);

   int i=0;

while(1){

   for(i=0;i<8;i++){
      bit_set(LATD,i);
      delay_ms(1000);
   }
   i=0;
   LATD=0;

}

}


This code works but I don't use the array unfortunately
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Aug 27, 2014 1:33 pm     Reply with quote
This code lights up LEDs on PortB, bits 0 to 3. They are turned on
sequentially. Once turned on, the Leds stay on. This program
shows how to read from an array. I used PortB because that's the
way my hardware board is setup.
Code:

#include <18F452.h>
#fuses XT, BROWNOUT, PUT, NOWDT, NOLVP
#use delay(clock=4M)
#use rs232(baud=9600, UART1, ERRORS)

 int LED_LookupTable[8]={0,1,2,3,4,5,6,7};

#byte PORTB = getenv("SFR:PORTB")

//===================================
void main()
{
int i;

output_b(0x00);  // All Leds off initially, and PortB TRIS = all outputs

for(i = 0; i < 4; i++)
   {
    bit_set(PORTB, LED_LookupTable[i]);
    delay_ms(500);
   }

while(1);
}
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