QuickStart Programming Issue

briank77479

I'm working with a Propeller QuickStart, RevB board. I loaded a program onto the EEPROM, disconnected the USB connection and was using the board powering it from a Power Supply for experimentation. After running the experiment I realize I had to make a change to the program. I powered down the QuickStart board, connected the USB connection to download the revised program. However, now when I try to download, the "No Chip Found On Any Serial Port" & "Unable to Open Com7" message comes up. If I disconnect the board and power it from the Power Supply the original program still is functioning. When it was connected to the USB I tried reset just to see if I could get the Propeller Tool to identify the board, but the same message comes up. Is there a way to correct this so I can reprogram the board?

Thanks for your help.
Brian

Duane Degn

briank77479 wrote: »

When it was connected to the USB I tried reset just to see if I could get the Propeller Tool to identify the board, but the same message comes up. Is there a way to correct this so I can reprogram the board?

Did you have any debug messages in the program? If so, do these messages display in the terminal window?

If you have lots of debug messages, it can cause a problem for Windows as it tries to open the com port to connect with the Propeller. If this is the problem, you can get around it by pressing reset half a second before attempting to program the Prop with F10 or F11.

prof_braino

Do you have anything on pins 30 &31?

If you have too many comm ports, sometimes windows has a problem.
"Too Many" could be more than 20, but some times it could be more than two.

I used the following in a batch.bat file to unistall all comports.
They automatically reinstall on next insert.

echo off
echo -------------------------------------------------------
echo -
echo -
echo enable display of non present devices
set devmgr_show_nonpresent_devices=1 
echo when device manager opens, select show hidden devices
echo uninstall all comports, they will reinstall upon insert
echo -
echo -
pause
start devmgmt.msc
echo 
echo next key press will exit this window
echo -
echo -
echo -
echo on
pause

mindrobots

Try the "magic resistor" fix. No QuickStart should leave home without it!

David Betz

mindrobots wrote: »

Try the "magic resistor" fix. No QuickStart should leave home without it!

The OP mentioned using a Rev B board which shouldn't require that fix.

briank77479

Thank you guys for your help. I'm working with two quickstart boards, a RevA and RevB. Interestingly I plug each board separately when I download a program to try and avoid issues. I thought of the resistor idea, should've tried it, but thought it was for the RevA board and working with SimpleIDE.
Again, thank you for the suggestions!!!
Brian