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If you try to read longer messages (>256 bytes) from USB device from host side, the buffer rolls over overwriting the buffer. For DUE/SAM can handle pipes with 1024 bytes, a uint16_t should be used.
per1234
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Apr 23, 2019
system/libsam/source/uotghs_host.c
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| { | ||
| uint8_t *ptr_ep_data = 0; | ||
| uint8_t nb_byte_received = 0; | ||
| uint16_t nb_byte_received = 0; //otherwise roll over when reading pipe >256 Bytes |
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I feel the comment on this line will be confusing when read without the context of the other information in this pull request. If the comment is to be there, I think it could be better worded.
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If you try to read longer messages (>256 bytes) from USB device from host side, the buffer rolls over overwriting the buffer.
For DUE/SAM can handle pipes with 1024 bytes, a uint16_t should be used here.
I needed this for example to be able to read 512 bytes of data from a USB-Midi device.