forked from Elara6331/itd
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
|
package infinitime
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"encoding/binary"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// SetTime sets the current time, and then sets the timezone data,
|
||
|
|
// if the local time characteristic is available.
|
||
|
|
func (d *Device) SetTime(t time.Time) error {
|
||
|
|
c, err := d.getChar(currentTimeChar)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
buf := &bytes.Buffer{}
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint16(t.Year()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Month()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Day()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Hour()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Minute()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Second()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(t.Weekday()))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8((t.Nanosecond()/1000)/1e6*256))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(0b0001))
|
||
|
|
|
||
|
|
_, err = c.WriteWithoutResponse(buf.Bytes())
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
ltc, err := d.getChar(localTimeChar)
|
||
|
|
if err != nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
_, offset := t.Zone()
|
||
|
|
dst := 0
|
||
|
|
|
||
|
|
// Local time expects two values: the timezone offset and the dst offset, both
|
||
|
|
// expressed in quarters of an hour.
|
||
|
|
// Timezone offset is to be constant over DST, with dst offset holding the offset != 0
|
||
|
|
// when DST is in effect.
|
||
|
|
// As there is no standard way in go to get the actual dst offset, we assume it to be 1h
|
||
|
|
// when DST is in effect
|
||
|
|
if t.IsDST() {
|
||
|
|
dst = 3600
|
||
|
|
offset -= 3600
|
||
|
|
}
|
||
|
|
|
||
|
|
buf.Reset()
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(offset/3600*4))
|
||
|
|
binary.Write(buf, binary.LittleEndian, uint8(dst/3600*4))
|
||
|
|
|
||
|
|
_, err = ltc.WriteWithoutResponse(buf.Bytes())
|
||
|
|
return err
|
||
|
|
}
|