Gabotronics

Hi,

Thought I'd see if I could get RS232 control using the STK500 spare RS232 level shifter. Soldered to the two vias for tx and rx and ran them through 20 cm of fine wire along with a ground connection. Powered with a USB cell phone charger it did not work. Unplugging the wall wart and shorting rx to tx on the USB connector gave a good loopback at 115200 to the terminal program though. I guess the USB cable capacitance was too much to drive at that rate (which is pushing the limit of the MAX202cse converter on the STK500 anyway).

But powering from the STK500 itself did work, and I could get the screen dump using hyperterminal on XP COM1 (a real serial port that connects to the STK500).

Setting up such a connection would be easier if the baud rate could be configured from the menu; dropping it to 19200 initially would bypass such problems and maybe would allow long cables to remote devices.

I flashed the 1.24 firmware before getting it to work, so can't say for sure it would have worked with the initial 1.05 firmware.

Protocol Sniffer: Use the K1 button to start/stop data capture, so that the buffer can be analyzed at leisure.

Implemented in version 1.34

Why is the MSO and AWG limited to 8 bit resolution? It looks like the ATxmega128A1 has 12 bit capability for both DAC and ADC?

The XProtoLab was also captured on Dangerous Prototypes- I missed it but ran across it after reviewing some past blog entries.

http://dangerousprototypes.com/2011/05/29/avr-xmega-oscilloscope-and-signal-generator/

Hi
 
I would just like to say what a great little tool this scope is.  Its more useful than I was expecting and works great on slow signals.I have a Tektronix 60mhz scope but find sometimes its more convenient to use the MEGA Xprotolab scope.

I wanted to try out the screen capture function but as I only use linux I used minicom which works after changing the setting, here's how to get it working.

sudo minicom -s
 
You will see this.
 
+-----[configuration]------+
| Filenames and paths       
| File transfer protocols   
| Serial port setup         
| Modem and dialing         
| Screen and keyboard       
| Save setup as dfl         
| Save setup as..           
| Exit                      
| Exit from Minicom         
+--------------------------+
 
Select File transfer protocols.
 
change this line:
F  xmodem     /usr/bin/rx -vv                 Y    D    N       Y       N
to this:
F  xmodem     /usr/bin/rx -vv -c              Y    D    N       Y       N
 
+------------------------------------------------------------------------------+
|     Name             Program                 Name U/D FullScr IO-Red. Multi
| A  zmodem     /usr/bin/sz -vv -b              Y    U    N       Y       Y
| B  ymodem     /usr/bin/sb -vv                 Y    U    N       Y       Y
| C  xmodem     /usr/bin/sx -vv                 Y    U    N       Y       N
| D  zmodem     /usr/bin/rz -vv -b -E           N    D    N       Y       Y
| E  ymodem     /usr/bin/rb -vv                 N    D    N       Y       Y
| F  xmodem     /usr/bin/rx -vv -c              Y    D    N       Y       N
| G  kermit     /usr/bin/kermit -i -l %l -b %b  Y    U    Y       N       N
| H  kermit     /usr/bin/kermit -i -l %l -b %b  N    D    Y       N       N
| I  ascii      /usr/bin/ascii-xfr -dsv         Y    U    N       Y       N
| J    -
| K    -
| L    -
| M  Zmodem download string activates... D
| N  Use filename selection window...... Yes
| O  Prompt for download directory...... No
|
|   Change which setting? (SPACE to delete)
+------------------------------------------------------------------------------+
 
Select Serial port setup.
 
Change the settings to these:
 
Your Serial Device may be different from /dev/ttyUSB0.
 
+-----------------------------------------------------------------------+
| A -    Serial Device      : /dev/ttyUSB0
| B - Lockfile Location     : /var/lock
| C -   Callin Program      :
| D -  Callout Program      :
| E -    Bps/Par/Bits       : 115200 8N1
| F - Hardware Flow Control : No
| G - Software Flow Control : No
|
|    Change which setting?
+-----------------------------------------------------------------------+
 
Select Save setup as dfl and then Exit.
 
press CTRL-A R.

+-[Download]--+
| zmodem
| ymodem
| xmodem
| kermit
+-------------+
 
Select xmodem.
 
Enter the location and name for the BMP image.
 
+-----------------------------------------+
|Please enter file names
|> /home/<user>/scope.bmp
+-----------------------------------------+
 
you should then see:
 
+----------[xmodem download - Press CTRL-C to quit]-----------+
|
|rx: ready to receive /home/matthew/scope.bmp
|Bytes received:    1152   BPS:563
|
|Transfer complete
|
| READY: press any key to continue...
+-------------------------------------------------------------+
 
To quit press CTRL-A X.
 
 
I hope this is of use to someone.
 
Matt

I agree... when I first used this function, it did seem backwards to me. MOVE- should move the traces down or in a negative direction. MOVE+ should move the traces up, or in a positive direction.

W0CNN

Trace MOVE- moves the trace up and MOVE+ moves it down.  These functions should be swapped.

Per Gabriel's notes about the source- the source code does NOT include the main mso.c file. That's why you get the blank screen at startup. He indicated he likely will never release the mso source code.

-Reid-

W0CNN

I install WinAVR-20100110, recompile again, and Build succeeded with 54 Warnings...

but, after updating to Xprotolab it only show blank page with option offset, sleep, and restore.

Restore doesn't change anything. It's written ver 1.16

so I update with the hex file from here : http://www.gabotronics.com/download/xprotolab/xprotolab-hex.zip

It come back to normal Xprotolab ver 1.18

anyone had any experience with the source code?

Hi, I'm still new at AVR. Recently I buy Xprotolab and download the source code hardware 1.4 from here :

http://www.gabotronics.com/download/xprotolab/xprotolab-source.zip

Whenever I try to rebuilding all, it's showing an error. I'm using AVR Studio 4.

Could you give me some suggestion?

Thank you.

In file included from ../awg.c:20:

c:/winavr-20090313/lib/gcc/../../avr/include/avr/eeprom.h:141:4: error: #error "Unknown EEPROM register(s) location."

make: *** [awg.o] Error 1

Build failed with 1 errors and 0 warnings...

Got the parts today and couldnot resist to fix the xprotolab... worked in one!

Thanks for the fast delivery (UPS took 8 days to get the packet to the Netherlands)