Hserin & Hserout - Trying to blink an LED

[Megahertz]

OK, I have disconnected the TX module. Now only RX module is connected. When I power up the IC, the receiver module catches codes in the air.
NORMAL BEHAVIOUR:Main led should keep blinking, TMR1 led should keep blinking, and when ever PIC enters RX ISR, PortB.5 LED should toggle (HSERIN IS COMMENTED HERE, SO NO WAITING OR CHECKING FOR THE DATA CURRENTLY).

But is it still not happening, I will jump onto wired communication between two ICs when this will start working normally. Currently, as soon as LED in RX ISR toggles, it hangs and so IS the led in the main loop. Only TMR1 LED keeps blinking. Looks like code is getting stuck somewhere when it enters RX ISR.

I am not communicating with any ICs currently. Just trying to blink LED's in interrupts so I know that interrupts are happening, code is entering there and getting out of there.

[Jumper]

Hi,

Maybe your RX module picks up so much noice that it is constantly receiving "data" and therefore you are more or less stuck interupting all the time...

Pull out the RX module too and connect the RX pin to GND.. that would leave you with a LED in the main loop and the TMR1 LED toggle.

when you have done that.. take a new pic and send data from new pic TX pin to OLD pic RX pin using a cable..

Or put a scope on the RX pin you have today and see what is actually happening....

[vaporized]

Hello.
If you commented out HSERIN in the ISR then you're not clearing interrupt flag, therefore constantly looping between main routine and the ISR. Also, I would advise to read RCREG first then toggle portb.5. But it would be much better to pick up a complete package and deal with it in the main routine.

Out of curiosity:

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 20h ' Enable transmit, BRGH = 0
DEFINE HSER_SPBRG 12 ' 4800 Baud @ 0.17%
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

RCSTA = $90 ' Enable serial port & continuous receive
TXSTA = $20 ' Enable transmit, BRGH = 0
SPBRG = 12 ' 4800 Baud @ 0.17%

Why doing same thing twice?