56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package picoserial
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import (
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"fmt"
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"time"
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"go.bug.st/serial"
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"go.bug.st/serial/enumerator"
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)
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func FindDevice() (string, error) {
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ports, err := enumerator.GetDetailedPortsList()
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if err != nil {
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return "", fmt.Errorf("enumerating ports: %w", err)
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}
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for _, p := range ports {
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if p.IsUSB {
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return p.Name, nil
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}
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}
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return "", nil
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}
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func Open(portName string) (serial.Port, error) {
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return serial.Open(portName, &serial.Mode{BaudRate: 115200})
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}
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// SendAndReceive sends data and reads the response with a timeout.
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func SendAndReceive(portName string, data []byte, timeout time.Duration) ([]byte, error) {
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port, err := Open(portName)
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if err != nil {
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return nil, fmt.Errorf("opening %s: %w", portName, err)
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}
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defer port.Close()
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port.SetReadTimeout(timeout)
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_, err = port.Write(data)
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if err != nil {
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return nil, fmt.Errorf("writing to %s: %w", portName, err)
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}
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var resp []byte
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buf := make([]byte, 256)
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for {
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n, err := port.Read(buf)
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if n > 0 {
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resp = append(resp, buf[:n]...)
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}
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if err != nil || n == 0 {
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break
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}
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}
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return resp, nil
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}
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