[BUG] Found an error on pio_usb_host.c

[luisibalaz]

So I was playing around with that file given that I'm writing an xinput USB host implementation for the Pico, when I found a bug.

It looks like it is a typo, it is on line 851 (request_length is declared on line 849):
https://github.com/sekigon-gonnoc/Pico-PIO-USB/blob/main/src/pio_usb_host.c#L851

  uint16_t request_length =
      get_configuration_descriptor_request.length_lsb |
      (get_configuration_descriptor_request.index_msb << 8); // <- HERE, that *index_msb* should be *length_msb*

It should say:

  uint16_t request_length =
      get_configuration_descriptor_request.length_lsb |
      (get_configuration_descriptor_request.length_msb << 8);

It is a minor typo, but generates wrong information.

[soulfish5]

@luisibalaz thanks for this! I ran into this problem a few months back when I was porting a driver from the PICOs USB to PIO.