| | |
| | | return |
| | | } |
| | | |
| | | func Write(ipAddr string, address uint16, value int) (err error) { |
| | | func Write(ipAddr string, address uint16, value int, endian string, length int) (err error) { |
| | | address-- |
| | | var bytesVal []byte |
| | | bytesVal = intToBytes(value) |
| | | bytesVal = intToBytes(value, endian, length) |
| | | cli := getModbusConnection(ipAddr) |
| | | _, err = cli.WriteMultipleRegisters(address, uint16(len(bytesVal)), bytesVal) |
| | | dealErr(err, ipAddr) |
| | | return err |
| | | } |
| | | |
| | | func intToBytes(value int) (data []byte) { |
| | | if value <= 1<<16 { |
| | | data = make([]byte, 2) |
| | | binary.BigEndian.PutUint16(data, uint16(value)) |
| | | func intToBytes(value int, endian string, length int) (data []byte) { |
| | | if endian == "mix" { |
| | | data = make([]byte, 0, 4) |
| | | highVal := value / (1 << 16) |
| | | highBts := make([]byte, 2) |
| | | binary.BigEndian.PutUint16(highBts, uint16(highVal)) |
| | | lowValue := value % (1 << 16) |
| | | lowBts := make([]byte, 2) |
| | | binary.BigEndian.PutUint16(lowBts, uint16(lowValue)) |
| | | data = append(data, lowBts...) |
| | | data = append(data, highBts...) |
| | | } else { |
| | | data = make([]byte, 4) |
| | | binary.BigEndian.PutUint32(data, uint32(value)) |
| | | if length == 1 { |
| | | data = make([]byte, 2) |
| | | if endian == "big" { |
| | | binary.BigEndian.PutUint16(data, uint16(value)) |
| | | } else { |
| | | binary.LittleEndian.PutUint16(data, uint16(value)) |
| | | } |
| | | } else { |
| | | data = make([]byte, 4) |
| | | if endian == "big" { |
| | | binary.BigEndian.PutUint32(data, uint32(value)) |
| | | } else { |
| | | binary.LittleEndian.PutUint32(data, uint32(value)) |
| | | } |
| | | } |
| | | } |
| | | return |
| | | } |