Function openthread_sys::otPlatDebugUart_getc

pub unsafe extern "C" fn otPlatDebugUart_getc() -> c_int

Poll/Read a byte from the debug uart

This function MUST be implemented by the platform

@retval (negative) no data available, see otPlatDebugUart_kbhit() @retval (0x00..0x0ff) data byte value