Re: [Gumstix-users] BT on BTUART

[Craig H. <cr...@hu...>]

On Feb 28, 2005, at 12:52 AM, Tim Auton wrote:

> There may not be any more hardware serial ports, but there are plenty 
> of GPIOs. With the oomph of the PXA255 I wouldn't have thought 
> bit-banging serial using the GPIOs would be a prohibitive overhead. 
> I'm confident that the hardware is up to the task, but I'm no Linux 
> kernel hacker, so there may be a world of stuff I'm missing there.

I think as has been pointed out that bit-banging a new "UART" on GPIOs 
would be difficult if not impossible in practice at any reasonable baud 
rate.  However, creating a "super serial" buddy board with 2, 4, 8, 
however many UARTs you want, linked to the PXA over SPI would work 
fine, and likely be pretty easy to implement,

> Just a matter of software :D

Make that hardware and software ;P

C