h6. [[GPIO]] h6(. » [[GPIO SWI Calls|SWI Calls]] h6((. » GPIO_WriteData h2. GPIO_WriteData h5. (SWI &58F81) |_<^. Entry | | |<^. R0 |<^. Logical GPIO pin number | |<. R1 = 0 (set low), 1 (set high)| h4. Use Writes the state of the given GPIO pin, or returns an error if the pin number is not valid.