39 lines
599 B
Go
39 lines
599 B
Go
package sponsor
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import (
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"os"
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"strings"
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"time"
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)
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func readSerial() (string, error) {
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f, err := os.OpenFile("/dev/PulsaresSerial", os.O_RDWR, 0o644)
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if err != nil {
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return "", nil
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}
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if _, err := f.Write([]byte{0x0E, 0x00, 0x61, 0x7C, 0xD2, 0x71}); err != nil {
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return "", err
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}
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// serial timeout
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time.AfterFunc(3*time.Second, func() {
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_ = f.Close()
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})
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var token string
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b := make([]byte, 512)
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for {
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n, err := f.Read(b)
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if err != nil {
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return "", nil
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}
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token += string(b[:n])
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if token, ok := strings.CutSuffix(token, "\x04"); ok {
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return token, nil
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}
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}
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}
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