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using semaphore with device drivers


Hi all!

Based on an interrupt serial driver I want to build a device driver for a
touch screen which work with rs232 over a small protocol.

here the devio table of the touch driver:

static DEVIO_TABLE(edip_devio,
                   edip_write,
                   edip_read,
                   edip_select,
                   edip_get_config,
                   edip_set_config
    );


DEVTAB_ENTRY(edip_io0, 
             "/dev/edip0",  //eDip Name
             "/dev/ser1", //based default on the /dev/ser1 driver
             &edip_devio, 
             edip_init, 
             edip_lookup,      // Execute this when device is being looked
up
             &edip_private_info0);

writing packages works fine from the application over cyg_io_write().

but I have problem in receiving packages because of the interrupt driver.
now i want to install semaphore for signal receiving data.

How can i pass the semaphore object from the application to the touch driver
and to the serial driver(or other way around)?

thx 4 help

Stefan

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