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RS232 rcv problem

 
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acidice333



Joined: 14 Oct 2006
Posts: 33

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RS232 rcv problem
PostPosted: Sat Oct 14, 2006 3:28 pm     Reply with quote
I'm having problems "receiving"... it transmits fine, but nothing happens when I press a key hence the LED doesn't go off.. I am using a breadboard, along with this RS232 interface (http://www.botkin.org/dale/rs232_interface.htm) using the internal clock (I hope?)

Code:

#include <16F628A.h>
#fuses INTRC,NOPROTECT,NOLVP,NOMCLR,NOWDT,PUT
#use delay (clock=4000000)
#use rs232(baud=9600, xmit=PIN_B6, rcv=PIN_B7)



//========================
void main()
{
port_b_pullups(TRUE);
output_high(PIN_A2);
puts("Input: ");
putc(getc());
output_low(PIN_A2);
}
Mattr0



Joined: 27 Mar 2005
Posts: 30

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PostPosted: Sat Oct 14, 2006 4:16 pm     Reply with quote
what interface from this page are you using?? mosfet, max232 ?? Your code looks ok. If you can read input on your PC screen then the oscilator is working ok. I would get a scope and check pin B7 and make shure there is a signal going into it.

If you are using the mosfetmethod on this web site I really recommend the Max232. If you use the TI version they are cheap.

Other than that check your connections.
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