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2 x rs232 16f877a

 
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makoo
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2 x rs232 16f877a
PostPosted: Thu Mar 04, 2010 5:29 pm     Reply with quote
hi there,

I have a rs232 sensor connect to the pic's hardware usart pins c6/c7. I have used an interrupt to get the data when it is being sent. This is then forwarded to the computer via a software usart on pins E0/E1. I used the interrupt as the pic does other stuff which need a constant loop for it to work.

The pic perfectly interrupt and get the reading and send it to the computer, but I want to send commands from the computer to the pic, to perfom a tasks.

I used this code for the sensor: ( I got the interrupt code from the examples in the CCS info folder.) (Code is in a while loop in the main)
Code:

while(bkbhit){
       putc( bgetc(),PC );}

so i used this code for the pc: (code is in a while loop in the main)
Code:

while(kbhit (PC))(
     cget = fgetc(PC)
       
       if (cget=='g')
         output_high(PIN_B2);

But when I send a 'g' from hyperterminal, nothing happens. Do I need to set another interrupt? How do I go about making the command from the computer to work?

Thanks in advance for your help.

makoo
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Thu Mar 04, 2010 6:15 pm     Reply with quote
Quote:
while(kbhit (PC)) {

Change this to
Code:
while(1) {

The fgetc() function has the kbhit included in it.
makoo
Guest
PostPosted: Fri Mar 05, 2010 2:32 am     Reply with quote
i have a while loop in the main already... can i do this?

Code:

while (True) --- already in the code...
  {
(if loops)
  delay_ms(500); //  led delay

while(1) {  --- adding this will it work??
cget = fgetc(PC)
       
       if (cget=='g')
         output_high(PIN_B2);
}

}



thanks again!

makoo
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

View user's profile Send private message

PostPosted: Fri Mar 05, 2010 2:43 am     Reply with quote
I didn't know that you had an outer loop. Is that all the code in the loop
or is it just code fragments ?

Post the complete code in those two while() loops.
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