DwlWin and USB-Serial converters


#1

It appears that DwlWin doesn’t like using “USB to serial” converters (e.g. Prolific USB To Serial).

It downloads a file and then fails to establish comms with the target.

Is there anything that can be done other than making PCs with serial ports very precious?


#2

Never had any problems with my USB-Serial converters…


#3

What type (make/model) do you use?


#4

I think the ones I’ve used with DWLWin have been FTDI, ATen, and a Digi “Edgeport”

But, if your download is starting, I think that means that the coms is OK - there is a fault in the target hardware somewhere;

eg, see: viewtopic.php?f=28&t=2235&p=15842&hilit=bootloader#p15842


#5

The download succeeds when using a PC with a “real” serial port [you actually saw it happening :wink: ]


#6

Hiya,

I’ve had various sucesses and failures with USB-RS232 adapters.

Had 100% (so far!) sucess rate with the FTDI TTL-232-3V3 USB to TTL cables - see specs here.

Have had some issues with third party USB-RS232 adapters using the FTDI chips…don’t know why - although I have had more sucess with adapters with short USB cables than long USB cables…

ciao, Dave


#7

I now have an Aten UC2322 - if you’ve used a similar port, what settings have you used?


#8

Mine say, “UC-232A” (I have 2)- they must be over 5 years old now.

IIRC, DWLWin gives only one port setting, and that’s the speed - I would almost certainly have used 115200.


#9

No I meant for the port driver. Normally I have to set “Tx FIFO” to 1 on serial port drivers, though there’s no such option for the Aten one, but instead there’s a whole page of settings that don’t mean very much. Time to get the 'scope out methinks :wink: