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Merge pull request #1102 from kasjer/kasjer/usbd-small-ep0-enumeration-workaround 

usbd: Workaround for non standard device descriptor request
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Ha Thach 2021-09-25 18:37:24 +07:00 committed by GitHub
parent 45ae409e3f c62c1433e7
commit 958cf2cfba
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1 changed files with 4 additions and 2 deletions
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6
src/device/usbd.c
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@ -971,9 +971,11 @@ static bool process_get_descriptor(uint8_t rhport, tusb_control_request_t const
uint16_t len = sizeof(tusb_desc_device_t);
// Only send up to EP0 Packet Size if not addressed
// Only send up to EP0 Packet Size if not addressed and host requested more data
// that device descriptor has.
// This only happens with the very first get device descriptor and EP0 size = 8 or 16.
if ((CFG_TUD_ENDPOINT0_SIZE < sizeof(tusb_desc_device_t)) && !_usbd_dev.addressed)
if ((CFG_TUD_ENDPOINT0_SIZE < sizeof(tusb_desc_device_t)) && !_usbd_dev.addressed &&
((tusb_control_request_t*) p_request)->wLength > sizeof(tusb_desc_device_t))
{
len = CFG_TUD_ENDPOINT0_SIZE;