Forums

UART commn using parallel port

Started by Unknown February 5, 2004
I am programming the ATMEGA128 using the parallel port of my PC. The pins
from the programmer go to the UART RX / TX of the MCU for downloading the
program. I want to send debug info from the MCU to the PC using the same
UART. I have code with me to send data using this UART .
--The question is that is there a way that the PC can intepret this data and
display it correctly. I am using redhat 9.
-- How do i do this? Is there some terminal software for linux.
-- *Is it at all possible that the parallel port can recieve data from the
UART of the ATMEGA128 ? *
Thanks for ure time


harshit <hsuri@usc.edu> wrote:
> I am programming the ATMEGA128 using the parallel port of my PC. The pins > from the programmer go to the UART RX / TX of the MCU for downloading the > program.
What the parallel port, for Pete's sake? The serial port should have been by far the more obvious choice, and easier to use, too --- just run a terminal program like good old Kermit and *see* what comes out of that port, without any hassles. -- Hans-Bernhard Broeker (broeker@physik.rwth-aachen.de) Even if all the snow were burnt, ashes would remain.
> > from the programmer go to the UART RX / TX of the MCU for downloading the > > What the parallel port, for Pete's sake? The serial port should have > been by far the more obvious choice, and easier to use, too --- just
Perhaps because the ISP protocol is synchronous?
On Thu, 5 Feb 2004 16:04:43 -0800, "harshit" <hsuri@usc.edu> wrote:

>I am programming the ATMEGA128 using the parallel port of my PC. The pins >from the programmer go to the UART RX / TX of the MCU for downloading the >program. I want to send debug info from the MCU to the PC using the same >UART. I have code with me to send data using this UART . >--The question is that is there a way that the PC can intepret this data and >display it correctly. I am using redhat 9. >-- How do i do this? Is there some terminal software for linux. >-- *Is it at all possible that the parallel port can recieve data from the >UART of the ATMEGA128 ? * >Thanks for ure time >
Add some circuitry to switch between using the parallel port for downloading and a RS232 buffer connected to the standard serial port. Writing a software UART device that can be used with software expecting to talk via a UART would be far to much work for very little advantage. Regards Anton Erasmus