Hello,
I am trying to use USB Host libraries for MSD in IAR, MQX version 4.1.0, board K21F120M. I need to write in a USB mass storage device.
To this purpose I created a dedicated task (see void Main_Task ( uint32_t param ), below) where I installed the driver, init the host and register the driver. Then in the infinite loop, I wait for the USB_DEVICE_ATTACHED:
My problem is that I never catch the USB_DEVICE_ATTACHED, but I always stay in USB_DEVICE_IDLE instead.
The callback function which should manage the events is "usb_host_mass_device_event()" and it is associated to my USB device in the DriverInfoTable (see below).
Unfortunately, this function is never called and I was not able to track the interrupt that should be calling it.
Any suggestion?
Thanks
Gabriele
Here's the code:
/* Driver Info Table */
static USB_HOST_DRIVER_INFO DriverInfoTable[] =
{
/* USB 2.0 hard drive */
{
{0x0C, 0x09}, /* Vendor ID per USB-IF */
{0x00, 0x10}, /* Product ID per manufacturer */
USB_CLASS_MASS_STORAGE, /* Class code */
USB_SUBCLASS_MASS_SCSI, /* Sub-Class code */
USB_PROTOCOL_MASS_BULK, /* Protocol */
0, /* Reserved */
usb_host_mass_device_event /* Application call back function */
},
{
{0x00,0x00}, /* All-zero entry terminates */
{0x00,0x00}, /* driver info list. */
0,
0,
0,
0,
NULL
}
};
void Main_Task ( uint32_t param )
{
... some init code ...
_int_disable();
_int_install_unexpected_isr();
// Install USB Host Driver
if (MQX_OK != _usb_host_driver_install(USBCFG_DEFAULT_HOST_CONTROLLER)) {
printf("\n Driver installation failed");
_task_block();
}
status = _usb_host_init(USBCFG_DEFAULT_HOST_CONTROLLER, &host_handle);
if (status != USB_OK) {
_int_enable();
printf("\nUSB Host Initialization failed. STATUS: %x", status);
fflush(stdout);
_task_block();
} /* Endif */
status = _usb_host_driver_info_register(host_handle, DriverInfoTable);
if (status != USB_OK) {
_int_enable();
printf("\nDriver Registration failed. STATUS: %x", status);
fflush(stdout);
_task_block();
}
_int_enable();
/* Infinite loop */
for ( ; ; ) {
for (i = 0; i < MAX_MASS_DEVICES; i++) {
switch ( mass_device[i].dev_state ) {
case USB_DEVICE_IDLE:
break ;
case USB_DEVICE_ATTACHED:
printf("Mass Storage Device attached\n");
fflush(stdout);
.... more code...
} /* end switch */
} /* end for */
} /* end for */
} /* end Main_task */
