If no bytes arrive within the time specified by ReadTotalTimeoutConstant, ReadFile times out. If there are no bytes in the input buffer, ReadFile waits until a byte arrives and then returns immediately. // Based on (v=vs.85).aspx: // If there are any bytes in the input buffer, ReadFile returns immediately with the bytes in the buffer. SetReadTimeoutEx(t, i uint32) error // SetLegacyReadTimeout - Very special function. // Generally interbyte timeout is not needed, but in some special cases this function cat help you. SetReadTimeout(t int) error // SetReadTimeoutEx - Sets whole package read timeout similar to general purpose function SetReadTimeout(), // and also sets interbyte timeout. `Read` function returns immediately when the requested number of bytes are available, // otherwise wait until the timeout expires and return all bytes that were received until them. Values: // t 0: set timeout to `t` milliseconds. Stringer // SetMode sets all parameters of the serial port SetMode(mode * Mode) error // SetReadTimeout sets the whole packet read timeout. func (e PortError) EncodedErrorString() stringįmt.func (e PortError) Code() PortErrorCode.func Open(portName string, mode *Mode) (Port, error).Send the string "10,20,30\n\r" to the serial port Open the first serial port detected at 9600bps N81 To send a string "10,20,30" and prints the response on the screen. This example prints the list of serial ports and use the first one This means that if you need USB enumeration Unfortunately the USB enumeration package for darwin (MacOSX) requires cgo This library tries to avoid the use of the "C" package (and consequently the need Ports, err := enumerator.GetDetailedPortsList()įmt.Printf("Found port: %s\n", port.Name)įmt.Printf(" USB ID %s:%s\n", port.VID, port.PID)įmt.Printf(" USB serial %s\n", port.SerialNumber)įor details on USB port enumeration see the documentation of the specific package. GetDetailedPortsList function in the enumerator package: The USB metadata, like VID/PID or USB Serial Number, with the If a port is a virtual USB-CDC serial port (for example an USB-to-RS232Ĭable or a microcontroller development board) is possible to retrieve The usual Read, Write and Close functions to send and receive data from the The port object implements the io.ReadWriteCloser interface, so we can use The configuration can be changed at any time with the SetMode function: The following snippets shows how to declare a configuration for 57600_E71: In the example above only the speed is changed so the port is opened using 115200_N81. If not specified the default options are 9600_N81, The Open function needs a "mode" parameter that specifies the configuration Port, err := serial.Open("/dev/ttyUSB0", mode) The serial port can be opened with the Open function: It is possible to get the list of available serial ports with the Package serial is a cross-platform serial library for the go language.
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