ftdi_poll_modem_status() results in upper byte of status being to to 0xFF

[Tom Saunders <trsaunders@xxxxxxxxx>]

Hi,

I've been experimenting with libftdi 0.18 on my Mac OS X 10.6.7 machine with gcc 4.2.1.

I've been finding that the upper byte of the unsigned short filled by ftdi_poll_modem_status is allways 0xFF. E.g, when the status should be 0x00b0 it comes out as 0xffb0.

By changing the final line of ftdi_poll_modem_status from:

*status = (usb_val[1] << 8) | usb_val[0];

to:

*status = (usb_val[1] << 8) | (usb_val[0] & 0xFF);

I've found the problem to be fixed. Is this something wrong with my environment or a bug in the library?

Tom

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