32 lines
697 B
Go
32 lines
697 B
Go
package shared
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import (
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"errors"
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"github.com/goburrow/serial"
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"io"
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"time"
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)
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// receive the requested number of bytes from serial port and stop after the given timeout in seconds
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func ReceiveBytes(port *serial.Port, count int, timeout time.Duration) ([]byte, error) {
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timeoutCh := time.After(timeout * time.Second)
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readCh := make(chan []byte, 1)
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errCh := make(chan error, 1)
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go func() {
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data := make([]byte, count)
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if _, err := io.ReadAtLeast(*port, data, count); err != nil {
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errCh <- err
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} else {
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readCh <- data
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}
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}()
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select {
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case <-timeoutCh:
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return nil, errors.New("timeout")
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case err := <-errCh:
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return nil, err
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case data := <-readCh:
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return data, nil
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}
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}
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