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add rts/cts flow-control support #201

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add rts/cts flow-control support #201

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1 change: 1 addition & 0 deletions serial.go
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,7 @@ type Mode struct {
Parity Parity // Parity (see Parity type for more info)
StopBits StopBits // Stop bits (see StopBits type for more info)
InitialStatusBits *ModemOutputBits // Initial output modem bits status (if nil defaults to DTR=true and RTS=true)
RTSCTSFlowControl bool // Enable RTS/CTS hardware flow control
}

// Parity describes a serial port parity setting
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4 changes: 2 additions & 2 deletions serial_unix.go
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Expand Up @@ -238,8 +238,8 @@ func nativeOpen(portName string, mode *Mode) (*unixPort, error) {
// Set raw mode
setRawMode(settings)

// Explicitly disable RTS/CTS flow control
setTermSettingsCtsRts(false, settings)
// Explicitly enable/disable RTS/CTS flow control
setTermSettingsCtsRts(mode.RTSCTSFlowControl, settings)

if err = port.setTermSettings(settings); err != nil {
port.Close()
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8 changes: 7 additions & 1 deletion serial_windows.go
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Expand Up @@ -388,7 +388,13 @@ func nativeOpen(portName string, mode *Mode) (*windowsPort, error) {
params.Flags |= windows.RTS_CONTROL_ENABLE
}
}
params.Flags &^= dcbOutXCTSFlow

if mode.RTSCTSFlowControl {
params.Flags |= dcbOutXCTSFlow
} else {
params.Flags &^= dcbOutXCTSFlow
}

params.Flags &^= dcbOutXDSRFlow
params.Flags &^= dcbDSRSensitivity
params.Flags |= dcbTXContinueOnXOFF
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