Prevent tu_edpt_number() from returning an invalid endpoint number #3335
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HiFiPhile
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Nov 14, 2025
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Describe the PR
The endpoint number is 4 bits wide. The original code extracts 7 bits.
~TUSB_DIR_IN_MASK is 0x7F but we need to use 0x0F.
It is safer not to assume that bits 4..6 of bEndpointAddress are zero.
Additional context
See the bEndpointAddress description in the following link.
EndpointDescriptors