Marr wrote:
> On Monday 08 December 2003 03:59pm, Alessio Sangalli wrote:
>>...
>>if I connect a usb-serial adapter to my laptop, and I connect to this
>>adapter an external serial modem, everything's perfect. But, if I
>>connect another device, for example a telescope, (which happens to have
>>only 3 lines connected, TX, RX and GND) I can't send or receive
>>anything. The same hardware works well in windows and I can access the
>>telescope using minicom on a desktop computer with a real serial port.
>>
>>Do you perhaps think that, the pl2303 doesn't work well with devices
>>that implement a 3-wire only communication? Is there somothing to do?
>>
The driver work good, but i have also this problem, if I use minicom before
starting my application.
It could be that "CLOCAL" is not handled in the PL2303 driver.
"CRTSCTS" is handled with its own msg, but where is the opposite
message?
if (cflag & CRTSCTS) {
i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
0x0, 0x41, NULL, 0, 100);
dbg ("0x40:0x1:0x0:0x41 %d", i);
greetings
Gernot Fink
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