Problem with Serin and On Interrupt

[EvilGhozt]

Thx for the reply.

But I think I'm going to use another method.
By connecting RTS to B0/INT I can easy toggle RTS HIGH and then LOW, after that sending the rs232 data. This will alert the pic to listen for any incomming data on RX port...



Now to next problem.

Code:


High led1
Pause 100
Low led1
SerOut2 PORTB.2,396,["Start"]

loop:
i = i + 1
IF i = 1000 Then High led2
IF i = 2000 Then
Low led2
i = 0
EndIF
goto loop

* There are some other code but I dont think its relevant in this matter..

I resently detected that the led2 in main loop does not always start flashing in the beginning (happens about ~ once of ten) . It can take up to 5-6 sec before it starts flashing. Is there some problem with the SerOut2 command? or pic damage?
Some other thing I was wondering, how often those a pic fail? I mean, can I run a loop like that (room temperature ~20C) in a month/year without a fail that cause a brake?

[Darrel Taylor]

By connecting RTS to B0/INT I can easy toggle RTS HIGH and then LOW, after that sending the rs232 data. This will alert the pic to listen for any incomming data on RX port...

WHY? Why not just use the USART and forget about the extra wiring. The USART will generate an interrupt to notify when data comes in. And, it won't miss a BIT.
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[EvilGhozt]

How should I write the code then?
I would be grateful if you could paste some code or just help me with some hints how to do...

Thx mate.

[Darrel Taylor]

Using your original example, it might look like this ...

DEFINE OSC 4

DEFINE HSER_RCSTA 90h 'Hser receive status init 
DEFINE HSER_TXSTA 20h 'Hser transmit status init 
DEFINE HSER_BAUD 2400 'Hser baud rate 

INTCON.6 = 1          ' Enable Peripheral interrupts
PIE1.5 = 1            ' Enable USART receive ints (RCIE)

on interrupt goto myint

loop:
    pause 1
goto loop

disable
myint:
    Hserin [wait("IB")]
resume
enable

HTH,
&nbsp; Darrel

[EvilGhozt]

Should i connect B0/INT to B1/RX? or does this detect interrupt on the RX port?

[Darrel Taylor]

For a 16F628, the USART pins (RX and TX) are 7 and 8. Same as RB1 and RB2.
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[EvilGhozt]

Oh it works! Thanx _ALOT_ Darrel Taylor.
This will make the program faster and a bit easier.

That was all for today, time for bed. Good night...