Set Transmit Flow Control
ctsf, dsrf = cpo:txf( [ctsf], [dsrf] )
Set and/or Get transmit flow control.
| Value | Description |
|---|---|
| 0 | Manually controlled handshake line |
| 1 | Used for flow control |
Data will not be output on the TX pin unless all enabled handshake lines are asserted by the other device.