Lpc2000

On 16 Mar 2005 at 8:28, balazs_scherer wrote:

> 
> 
> Hello,
> 
> OK, I have used TCP/IP and applications on PIC using not more than
> 32k. But it is a hacking, and a garage development.
> 
> For a real TCP/IP application you need multiple threads, and RAM to
> buffer packets. So I suggest eCos and LwIP. It a present sollution
> however the LwIP port and configuration options are not too well
> implemented (I think) and needs redevelopment. This stack uses abot
> 100k with eCos, but without applications (The physical layer is also a
> great problem, the GPIO system of LPCs are not designed for bus
> connections, I suggess some modifications here, beacause many
> applications needs an 8 bit bus, and the independed SET, CLEAR, READ
> mechanism of LPC is good for individual pins, but very bad for buses).

The PIN registers are actually RD/WR registers, and not RD only as specified
in the documentation. If you write to the PIN register, it sets the pins, as
specified in the bits. i.e. if you write 0xFFFF0000 to a PIN register it will
set the top 16  GPIO pins high, and the bottom 16 low.

Regards
   Anton Erasmus

[Rest Snipped]
-- 
A J Erasmus