Serial Communicatoin + External Interrupt - Electronic Circuits Projects Diagrams Free

huanyong · 18th October 2003, 05:18 AM

hii...i have the problem with external interrupt. How to send a signal (like pressing enter button) on PC (through serial port) to activate the external interrupt in PIC?

crust · 18th October 2003, 04:36 PM

If you are using serial port level shifter (like the max232), you could just tie its output to the external interrupt and set your external interrupt to occur on the proper transition. Whenever the state toggles (such as a character coming down the serial line), your interrupt will fire and you can handle whatever in software.

Camping · 20th October 2003, 08:26 AM

Hey,

I am using a pic16F73 now, and I want to put some buttons on the pic I think that portB will do on RB4 t/m RB7.
Can I just put a button on that pin and get RBIE in INTCON set and then I can get a interupt from the buttons.

Thanks,

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

18th October 2003, 05:18 AM	(permalink)
huanyong	Serial Communicatoin + External Interrupt hii...i have the problem with external interrupt. How to send a signal (like pressing enter button) on PC (through serial port) to activate the external interrupt in PIC?

18th October 2003, 04:36 PM	(permalink)
crust	If you are using serial port level shifter (like the max232), you could just tie its output to the external interrupt and set your external interrupt to occur on the proper transition. Whenever the state toggles (such as a character coming down the serial line), your interrupt will fire and you can handle whatever in software.

20th October 2003, 08:26 AM	(permalink)
Camping	Hey, I am using a pic16F73 now, and I want to put some buttons on the pic I think that portB will do on RB4 t/m RB7. Can I just put a button on that pin and get RBIE in INTCON set and then I can get a interupt from the buttons. Thanks,