FPGA Central

Hi --

I have the Spartan 3 Starter Board. I am trying to find an example for the
Serial RS232.
Something like connecting the serial port to the desktop PC. Something
simple like say I have a clock running on the Spartan 3 and it outputs data
to the serial port at a given baud rate then connect the PC with a terminal
program and read the data -- or have the Spartan 3 set up as a listener and
I send it data via the PC.

Thank you

You have to write a UART module or use a written one for example the
MiniUART from www.opencores.org.

>You have to write a UART module or use a written one for example the
>MiniUART from www.opencores.org.

The transmit side is pretty simple. It's just a 10 bit shift register.
Clock it at the bit rate. First and last bits are start/stop.
Data goes in the middle. Load every N ticks. Make N be more
than 10 if you don't want to transmit at full speed. 16 might be
simple to implement.

Should be a simple hack to do something like send out the switches.
(Put a constant in the high bits to make a printable character.)

--
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Hi --
Thanks for info.
I am new/hobbiest and would be great to have a simple VHDL example of the
below to study/learn from if you have anything like that around would be
greatly appretiated!

"Hal Murray" <[email protected]> wrote in message
news[email protected] ...
>
>>You have to write a UART module or use a written one for example the
>>MiniUART from www.opencores.org.
>
> The transmit side is pretty simple. It's just a 10 bit shift register.
> Clock it at the bit rate. First and last bits are start/stop.
> Data goes in the middle. Load every N ticks. Make N be more
> than 10 if you don't want to transmit at full speed. 16 might be
> simple to implement.
>
> Should be a simple hack to do something like send out the switches.
> (Put a constant in the high bits to make a printable character.)
>
> --
> The suespammers.org mail server is located in California. So are all my
> other mailboxes. Please do not send unsolicited bulk e-mail or
> unsolicited
> commercial e-mail to my suespammers.org address or any of my other
> addresses.
> These are my opinions, not necessarily my employer's. I hate spam.
>