UART - Video

In this small video, you can see a simple counter made with my UART board. The program for counting up the LEDs is running on a PC. The µC only communicates with the PC and is responsive to his commands.

UART - again

Here is a nice driver for Win2k + WinXP to enable the inportb and outporb commands under those systems: porttalk
This can be quite usefull, if you have old software, and you must work with those software - somehow.
The driver is quite nice. It works perfectly with my UART Testboard  example program (number 3).
I converted it from linux to Open Watcom (16 bit Dos).

Here is the output:

C:\Dokumente und Einstellungen\xxxx>D:\Programme\porttalk\AllowIo.exe D:\Program
me\WATCOM\projects\uart\test3\test3.exe
AllowIO for PortTalk V2.0
Copyright 2002 Craig Peacock
http://www.beyondlogic.org
Executing D:\Programme\WATCOM\projects\uart\test3\test3.exe with a ProcessID of
2089937184
PortTalk Device Driver has set IOPM for ProcessID 2089937184.

C:\Dokumente und Einstellungen\xxxx>

~RS232 Testboard~
Testing all possible combinations...

Handshake is: off
2400 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
2400 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
2400 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 0, hs: false... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 1, hs: false... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 2, hs: false... Device error: '0x00' UART error: 0x0000
Handshake is: on
2400 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
2400 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
2400 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
4800 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
9600 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
14400 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
19200 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
28800 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
38400 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
57600 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 0, hs: true... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 1, hs: true... Device error: '0x00' UART error: 0x0000
115200 Baud, p.: 2, hs: true... Device error: '0x00' UART error: 0x0000
End.

UART toy - additional comments...

I forgot to mention, that the Linux program must be executed as root. Otherwise it will not work, because it needs low level access to the serial port.
And the program must be compiled with optimization turned on.

The correct preprocessor command for GCC under Linux is "__linux__" - with two underscores and in small letters.

All commands in the instruction set are stated as ASCII characters. The return values and the parameters are in hex.


If someone got the circuit to work with Windows XP, please inform me. ;)

Finally!

I was able to get my old Hewlett Packard photosmart 1115 to work - with Windows Vista.
It took me 8 hours to plan and setup an external print server with linux and cups.
Finding the right operating system was quite a challenge.

But now the s*** works!
In the end i installed Debian Linux 5.
And i'm still a bit confused why Vista is so stubborn when it comes to printer support. (And HP in supporting old printers with drivers for new operating systems)
With my old XP i have no problems - no matter how i connect the printer to the computer - the printer just works.
The opposite with Vista - no matter how i tried getting it to work - it was resisting my efforts... till today.
But now: the resistance is futile! XD