USB keyboard cannot be enumerated by KSDK2.0

hiwave — Mon, 24 Oct 2016 09:12:18 GMT

Hello, Wanghao

Customer have a 1D/2D scanner (USB keyboard device) which can be enumerated with KSDK1.3, but cannot by KSDK2.0. Could you please help to check ? Thanks !

Best Regards

Derek

Re: USB keyboard cannot be enumerated by KSDK2.0

cutworth — Mon, 24 Oct 2016 12:42:24 GMT

Hi Derek,

This issue can be fixed with the following code in bold added in usb_host_devices.c file.

static usb_status_t USB_HostProcessCallback(usb_host_device_instance_t *deviceInstance)
{
usb_host_pipe_t *pipe = (usb_host_pipe_t *)deviceInstance->controlPipe;
usb_status_t status = kStatus_USB_Success;
usb_descriptor_configuration_t *configureDesc;
volatile uint32_t i = 0xffffU;
usb_host_instance_t *hostInstance = (usb_host_instance_t *)deviceInstance->hostHandle;

switch (deviceInstance->state)
{
case kStatus_DEV_GetDes8: /* process get 8 bytes descriptor result */
pipe->maxPacketSize = deviceInstance->deviceDescriptor.bMaxPacketSize0;
hostInstance->controllerTable->controllerIoctl(
hostInstance->controllerHandle, kUSB_HostUpdateControlPacketSize, deviceInstance->controlPipe);
break;

case kStatus_DEV_SetAddress: /* process set address result */
while(i--)
{
;
}
deviceInstance->setAddress = deviceInstance->allocatedAddress;
hostInstance->controllerTable->controllerIoctl(
hostInstance->controllerHandle, kUSB_HostUpdateControlEndpointAddress, deviceInstance->controlPipe);
break;

The enumeration failure is caused by USB host sending set address request too fast to USB device. It needs to wait for some time.

Hao

topic Re: USB keyboard cannot be enumerated by KSDK2.0 in Kinetis Software Development Kit

USB keyboard cannot be enumerated by KSDK2.0

Re: USB keyboard cannot be enumerated by KSDK2.0