Non-functional Propeller code upload on Windows 7 when using USB-Serial adapter

Wossname

On two separate Windows 7 computers I am unable to use a USB to RS232 adaptor to program my Propeller board. I can get the Propeller IDE's F7 ("Identify Hardware") feature to work maybe 20% of the time, but F10 or F11 never work (error message: "Propeller chip lost on COM9"). I've tried holding the prop board in reset for a moment before atempting the programming operation but that doesn't seem to help.

Has anyone else had this problem and is there a solution?

I have got the latest drivers of the PL2303 Prolific adaptor (and it is a genuine Prolific product, not a chinese knock-off). I have to use this because there is no physical serial port on my new PC at work.

I don't want to have to modify this PCB to add the PropPlug header to it because it would force me to remove the MAX3232 chip I've got on there for the RS232 functionality.

The PCB itself isn't to blame because I can program it just fine when using a different PC with a hardware serial port on it.

Maybe win7 doesn't like USB/serial adaptors?

Any ideas gratefully received.

Erik Friesen

Get an ftdi converter. They are well proven. I have had issues with prolific in long term use, dropping bytes.

Rayman

Make sure you have the latest Prop Tool.

Try adjusting the Post-Reset delay under the menu Edit->Preferences and Operation tab.

StefanL38

I recommend an FTDI based USB-2-serial converter too.
Some time ago I tested a Polulu Wixel wireless serial link.

When using the Wixel wireless link the propeller-tool has problems with large code to get the code transferred to the propeller-chip
"bst" ( Brad's Spin Tool ) had no problems with it.

So you could give bst a try if it is able to transfer all data to the prop-chip
best regards
Stefan