Yes, this register is set to 0x3 by default which disables infrared operation. I experimented with changing these values but doing so did not result in coorect operation.
Something else I noticed was that the control register for UARTB has the UARTEN bit cleared after booting but works anyway. Reading through the documention I found that bit 3 (counting from 0) of the PINMUX register being enabled (i.e., set to 1) is what actually controls this port.
I was hoping that UARTC had the same sort of condition!
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