Re: PL2303 driver guide ?


>You have to poll the PL2303 for that.

Thanks Meindert,

I have implemented a polling mechanism to get data from PL2303 to the
embedded host. But there is another problem

According to PL2303's spec, the chip has an 256-byte-buffer for each Tx
and Rx operation. But when I transfer a large amount of data (about 3KB)
to the RS232 interface of PL2303, the USB host can only read a few bytes
from the USB interface. It seems that the data in PL2303's buffer has lost
so I cannot read all the data transfered to RS232 interface.




.

Relevant Pages

  • Re: USB power to external device
    ... VDIP1 is supplied on a PCB designed to fit a 24-pin DIP socket and provides access to all UART, SPI and FIFO interface pins of the VNC1L device. ... The FTDI VNC1L USB Host Controller ICs not only handle the USB Host Interface, and data transfer functions but owing to the inbuilt 8/32-bit MCU and embedded Flash memory, VNC1L encapsulates the USB device classes as well. ...
    (comp.arch.embedded)
  • Re: [RFC] Changes to the driver model class code.
    ... >> Then I moved the USB host controller code to use this new interface. ... The reference counting will now be correct. ...
    (Linux-Kernel)