Yes, first I am configuring the direction register and then writing data in to it. Will this be a problem? will it work, If we write data first and then configure the direction register?
-Gopal -----Original Message----- From: Galen Seitz [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 8:38 PM To: Jahagirdar Gopal-AGJ005 Cc: avr-gcc-list@nongnu.org Subject: Re: [avr-gcc-list] Glitch on GPIO Jahagirdar Gopal-AGJ005 <[EMAIL PROTECTED]> wrote: > HI, > > I have one peculiar problem here. > > One of the GPIO of atmega128, has been pulled up. When atmega128 boots > up, initialization script makes that GPIO pin high, irrespective of what > is pulled up (Atmega does not start booting immediately the power is > given. There is some delay given purposely between power-up and > execution de-assertion of reset signal). So the expected behavior is > that pin should continue to be high as measured on CRO. But there is a > glitch (10us) on that pin when GPIO is written high by software. > > > > Any idea on this behavior? Can this be solved? > Are you writing to the direction register before writing to the data register by any chance? It would be helpful to see the initialization code. galen _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
