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I haven't tried it yet, maybe windows requires an actual endpoints for binding. I am not sure |
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The reason DFU needs HID is because the BOS descriptor used for composite drivers. The issue will actually be present for any non composite device on Windows that uses WinUSB. The fix is simple, we update the BOS descriptor to be non composite: #define BOS_TOTAL_LEN (TUD_BOS_DESC_LEN + TUD_BOS_MICROSOFT_OS_DESC_LEN)
#define MS_OS_20_DESC_LEN 0xB2-16
#define VENDOR_REQUEST_MICROSOFT 1
// BOS Descriptor is required for webUSB
uint8_t const desc_bos[] =
{
// total length, number of device caps
TUD_BOS_DESCRIPTOR(BOS_TOTAL_LEN, 1),
// Microsoft OS 2.0 descriptor
TUD_BOS_MS_OS_20_DESCRIPTOR(MS_OS_20_DESC_LEN, VENDOR_REQUEST_MICROSOFT)
};
uint8_t const * tud_descriptor_bos_cb(void)
{
return desc_bos;
}
static uint8_t desc_ms_os_20[] =
{
// Set header: length, type, windows version, total length
U16_TO_U8S_LE(0x000A), U16_TO_U8S_LE(MS_OS_20_SET_HEADER_DESCRIPTOR), U32_TO_U8S_LE(0x06030000), U16_TO_U8S_LE(MS_OS_20_DESC_LEN),
// MS OS 2.0 Compatible ID descriptor: length, type, compatible ID, sub compatible ID
U16_TO_U8S_LE(0x0014), U16_TO_U8S_LE(MS_OS_20_FEATURE_COMPATBLE_ID), 'W', 'I', 'N', 'U', 'S', 'B', 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // sub-compatible
// MS OS 2.0 Registry property descriptor: length, type
U16_TO_U8S_LE(MS_OS_20_DESC_LEN-0x0A-0x14), U16_TO_U8S_LE(MS_OS_20_FEATURE_REG_PROPERTY),
U16_TO_U8S_LE(0x0007), U16_TO_U8S_LE(0x002A), // wPropertyDataType, wPropertyNameLength and PropertyName "DeviceInterfaceGUIDs\0" in UTF-16
'D', 0x00, 'e', 0x00, 'v', 0x00, 'i', 0x00, 'c', 0x00, 'e', 0x00, 'I', 0x00, 'n', 0x00, 't', 0x00, 'e', 0x00,
'r', 0x00, 'f', 0x00, 'a', 0x00, 'c', 0x00, 'e', 0x00, 'G', 0x00, 'U', 0x00, 'I', 0x00, 'D', 0x00, 's', 0x00, 0x00, 0x00,
U16_TO_U8S_LE(0x0050), // wPropertyDataLength
//bPropertyData: “{4df22270-47cd-44cc-9272-8f40c8ce815f}”.
'{', 0x00, '4', 0x00, 'D', 0x00, 'F', 0x00, '2', 0x00, '2', 0x00, '2', 0x00, '7', 0x00, '0', 0x00, '-', 0x00,
'4', 0x00, '7', 0x00, 'C', 0x00, 'D', 0x00, '-', 0x00, '4', 0x00, '4', 0x00, 'C', 0x00, 'C', 0x00, '-', 0x00,
'9', 0x00, '2', 0x00, '7', 0x00, '2', 0x00, '-', 0x00, '8', 0x00, 'F', 0x00, '4', 0x00, '0', 0x00, 'C', 0x00,
'8', 0x00, 'C', 0x00, 'E', 0x00, '8', 0x00, '1', 0x00, '5', 0x00, 'F', 0x00, '}', 0x00, 0x00, 0x00, 0x00, 0x00
};
TU_VERIFY_STATIC(sizeof(desc_ms_os_20) == MS_OS_20_DESC_LEN, "Incorrect size");References |
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I'm trying to make DFU driverless with MS OS 2.0 descriptor, while it works in the end it's a little strange.
I've to add another interface in order to make OS 2.0 descriptor works for example a placebo HID. In both case OS 2.0 descriptor is read by the host but without HID seems the host does nothing.
DFU only:
DFU + HID:
And my descriptors:
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