pl2303 driver
 

Hi
I have RHEL4 with kernel-2.6. I have a USB to serial convertor FT232R.this cable is sending data to a device used for temperature sensing.it is working well in windows.i have to make its interface and working in linux with kernel-2.6.RHEL4 already have pl2303.c and pl2303.h files in /usr/src..../drivers/usb/serial/pl2303.c,
I want to know some questions:
as pl2303 driver is already exist and when the cable is attached with USB port it is shown in lsmod....do we need to recompile kernel????
or built that module again
waiting 4 reply...
thanks in advance

If the module loads OK (which it has if it's in lsmod), then you should be OK. The device is usually /dev/ttyUSB? .

Dave

Hi
the lsmod shows the pl2303 module but did not show /dev/ttyUSB....what should i do now.....

Hi.

Do any new devices get created when you plug in the serial converter, e.g.:

(serial converter unplugged)
$ ls /dev > /tmp/unplugged
(plug in serial converter)
$ ls /dev > /tmp/plugged
$ diff /tmp/unplugged /tmp/plugged

Dave

The FT232R uses a different chip and therefore the pl2303 is the wrong module.
I believe the device uses the ftdi_sio module which should be in available in the latest kernel.

Look at the output of the dmesg and lsusb commands to see if the device is being recognized.

but i am not getting "/dev/ttyUSB"...only /dev/ttyS0,ttyS1...are seen.is it necessary when cable is plugged in USB at dmesg i should have /dev/ttyUSB?
waiting 4 ur reply

If the ttyS0, S1 etc devices appear when you plug in your cale is plugged in, then they should be the devices to use.

Dave

Is the ftdi_sio module loading? Look at the output of the command lsmod. look at the output of the dmesg command.