More than 2 INT pins..

zolsi · Joined: 24 Jan 2006 Posts: 51

Wich atmel avr µc is handle by bascom and has more than 2 interutp pins ? (atmega103 ?)

Thank you !

Cool

bzijlstra · Posted: Sat Mar 25, 2006 5:31 pm Post subject: more than one interrupt....

Atmega32 has two pins for interrupts. And how do I know that? I go to www.avrfreaks.net and click devices. Get a list with all AVR's with all features and a layout of the chip.

Lot's of info on that site.

Have fun
Ben Zijlstra

zolsi · Joined: 24 Jan 2006 Posts: 51

haha

very friendly answer thank you !!

btw, i asked for MORE than 2 INT pins ...

i.dobson · Posted: Sat Mar 25, 2006 7:42 pm Post subject:

Hi,

Have a look at a mega48 or mega88. They have a 2 external interrupts and several pin change interrupts on port C.

Regards
Ian Dobson

Luciano · Joined: 29 Nov 2004 Posts: 3149 Location: Italy

Hi,

About the pin change interrupts.
(ATmega48, ATmega88, ATmega168).

There are 3 Interrupt Vectors (Interrupt routines) for the
pin change interrupts.

PCINT0 for the pins PCINT7..0.
PCINT1 for the pins PCINT14..8
PCINT2 for the pins PCINT23..16

Best regards,

Luciano

Interrupt Vectors in ATmega168:

zolsi · Joined: 24 Jan 2006 Posts: 51

Thank you for this infos.
in fact i need 3 int pins for : the easy tcp/ip + 2 flowmeters. Wich µc would you choose ? Pin change int pins are the same as int pins ?

Thanks a lot.

Dibor · Joined: 04 Dec 2004 Posts: 125 Location: ISRAEL

Hello
Try to use Mega32
Has 3 external int. pins

CUL

i.dobson · Posted: Sun Mar 26, 2006 6:14 pm Post subject:

Hi,

You actually need 1 interupt and 2 external counters.

You could use a mega32 with the 2 flowmeters connected to T0 & T1 (portb.0 & 1). For the flow meters all you need to do is count the number of pulses over a fixed period of time.

The TCP/IP module could be connected to INT0 (portD.2).
Why not use I2C for TCP/IP, it uses fewer pins if that helps.

Regards
Ian Dobson