nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Precipheral — Mon, 15 Oct 2018 12:08:11 GMT

Ok, Thank you,I think I figured it out.

It looks like the encoded report is in ble_hids.c, functions rep_char_add and rep_map_char_add seem to do most of the heavy lifting and the functions used within them encode and then send the report.

Cheers, Ash.

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Kenneth — Mon, 15 Oct 2018 10:01:39 GMT

I was thinking of nRF52840 yes, the nRF52832 does not have USB.

Best regards,
Kenneth

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Precipheral — Fri, 12 Oct 2018 00:47:41 GMT

The USBD drives appears to not be supported for nRF52832, how does the keyboard work if the USBD driver isn't supported/used?

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Kenneth — Thu, 11 Oct 2018 13:19:55 GMT

Hi,

This was a dump from the ellisys usb sniffer using the \usbd_hid_composite example from sdk v15.2.

You can refer to the usbd library documentation on usage:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.2.0/lib_usbd.html?cp=4_0_0_3_59

Best regards,
Kenneth

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Precipheral — Thu, 11 Oct 2018 11:58:21 GMT

I thought it was Bulk because that is what wire shark is reporting, I'm still newish to packet sniffing and aware that they don't / can't always get the results perfectly right. After looking back it seems that wire shark is misreporting it.

Thank you for the tables, where / how did you get them?

Does p_hids contain all of the device and report descriptors?

Where specifically are the device Endpoint descriptors parameters in main.c or ble_hids.c ?

Thank you for your help.

RE: nRF5 SDK 15 HID Keyboard example Endpoint transfer types?

Kenneth — Thu, 11 Oct 2018 11:32:20 GMT

Hi,

Why do you believe it's using bulk transfer and not interrupt?

Both mouse and keyboard endpoints are setup with transfertype interrupt. To send mouse reports more frequently you may change:

/**
* @brief Mouse move repeat time in milliseconds
*/
#define CONFIG_MOUSE_MOVE_TIME_MS (1) // Instead of 5ms

Best regards,
Kenneth

GetDescriptor (Configuration)

Configuration descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x09

00001001

bDescriptorType

CONFIGURATION

0x02

00000010

wTotalLength

59 bytes

0x003B

00000000
00111011

bNumInterface

0x02

00000010

bConfigurationValue

0x01

00000001

iConfiguration

0x04

00000100

bmAttributes. Reserved

Zero

0x00

00000

bmAttributes. RemoteWakeup

Supported

0x1

bmAttributes. SelfPowered

Yes

0x1

bmAttributes. Reserved7

One

0x1

bMaxPower

500 mA

250

0xFA

11111010

Interface descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x09

00001001

bDescriptorType

INTERFACE

0x04

00000100

bInterfaceNumber

0x00

00000000

bAlternateSetting

0x00

00000000

bNumEndpoints

0x01

00000001

bInterfaceClass

Human Interface Device (Find out more online)

0x03

00000011

bInterfaceSubClass

Boot Interface

0x01

00000001

bInterfaceProtocol

Mouse

0x02

00000010

iInterface

0x00

00000000

Unknown descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x09

00001001

bDescriptorType

Class: 0x21

0x21

00100001

Remaining descriptor data

7 bytes

Endpoint descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x07

00000111

bDescriptorType

ENDPOINT

0x05

00000101

bEndpointAddress

1 IN

129

0x81

10000001

bmAttributes. TransferType

Interrupt

0x3

bmAttributes. Reserved

Zero

0x00

000000

wMaxPacketSize

64 bytes

0x0040

00000000
01000000

bInterval

1 frame (1000 us)

0x01

00000001

Interface descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x09

00001001

bDescriptorType

INTERFACE

0x04

00000100

bInterfaceNumber

0x01

00000001

bAlternateSetting

0x00

00000000

bNumEndpoints

0x01

00000001

bInterfaceClass

Human Interface Device (Find out more online)

0x03

00000011

bInterfaceSubClass

Boot Interface

0x01

00000001

bInterfaceProtocol

Keyboard

0x01

00000001

iInterface

0x00

00000000

Unknown descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x09

00001001

bDescriptorType

Class: 0x21

0x21

00100001

Remaining descriptor data

7 bytes

Endpoint descriptor

Name

Value

Dec

Hex

Bin

bLength

Valid

0x07

00000111

bDescriptorType

ENDPOINT

0x05

00000101

bEndpointAddress

2 IN

130

0x82

10000010

bmAttributes. TransferType

Interrupt

0x3

bmAttributes. Reserved

Zero

0x00

000000

wMaxPacketSize

64 bytes

0x0040

00000000
01000000

bInterval

1 frame (1000 us)

0x01

00000001