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How to Output_high and Output_low on Pin_A1 PIC16F690

 
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hoa35ktxd



Joined: 23 Nov 2014
Posts: 27
Location: Vietnam

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How to Output_high and Output_low on Pin_A1 PIC16F690
PostPosted: Mon Jan 19, 2015 11:06 pm     Reply with quote
My code:
Code:

Output_high(Pin_A1);
Delay_ms(500);
Output_Low(Pin_A1);
Delay_ms(500);

But it not work.
Why and how to fix this problem.
Thanks.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Jan 20, 2015 12:11 am     Reply with quote
You need an #include for the PIC, and #fuses and #use delay()
statements. Try this program:
Code:

#include <16F690.H>
#fuses INTRC_IO, NOWDT, BROWNOUT, PUT
#use delay(clock=4M)
   
//====================================
void main()
{

while(1)
  {
   output_high(PIN_A1);   // Blink LED 
   delay_ms(500);
   output_low(PIN_A1);
   delay_ms(500);
  }

}

However, be aware that Pin A1 is used by your ICD debugger and
programmer. My advice is to blink another pin, such as pin B6.
hoa35ktxd



Joined: 23 Nov 2014
Posts: 27
Location: Vietnam

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PostPosted: Tue Jan 20, 2015 6:48 am     Reply with quote
Thank you.
Your code are not work.
I need only PIN_A1.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Jan 20, 2015 12:42 pm     Reply with quote
It works for me. I used a Microchip Low Pin Count board with a 16F690
installed in it:
http://www.microchip.com/_ImagedCopy/DM164130-9.png

I compiled the program that I posted, and programmed it into the 16F690
with a Pickit3 programmer. Then I jumpered from Pin A1 to Pin C0,
because that board only has LEDs on pins C0 to C3.

Pin C0 is in a high-Z state, so it doesn't control anything. Only the signal
from Pin A1 controls the LED. It's blinking. It works.
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