Digital Write

Writes a high or low value to the specified digital pin(s). You must use set_digital_pin_mode to configure the specified pin as an output before using this function.

LabVIEW

Developer Note

This VI takes an array of clusters. Each cluster contains a U8 for the pin number and an enum/boolean/U8 ??? for the value.

Command Packet

  • Digital Write Command
  • Digital Write Response
  • Digital Write Command
    Description Writes a high or low value to the specified digital pin(s).
    Size Variable
    Format
    -
    -
    0
    1
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    N/A
    SoF : 0xFF
    PACKET SIZE
    2
    3
    4
    5
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    PACKET NUM
    CMD : 0x0041
    6
    7
    8
    9
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    NUM PINS
    PIN NUM(S)
    VALUE(s)
    CHECKSUM
    SoF Start of Frame. Always 0xFF.
    PACKET SIZE Packet Size In Bytes
    PACKET NUM The Current Packet Number. This value increments with each new packet.
    CMD Digital Write Command.
    NUM PINS The number of pins to write.
    PIN NUM(S) Variable Length. The DIO pin numbers to write. Each byte represents one pin number.
    VALUE(s) Variable Length. One bit per pin. 0=Low 1=HIGH. The MSB pin corresponds to the LSb of the MSB value.
    CHECKSUM Checksum. Computed by adding all of the bytes in the packet in U8 form ignoring rollover.

    LINX Target

    Developer Note

    The device firmware is responsible for setting pin direction (input / output)

    Response Packet

    Digital Write Response
    Description LINX device's response to Digital Write command
    Size 6 Bytes
    Format
    -
    -
    0
    1
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    N/A
    SoF : 0xFF
    PACKET SIZE
    2
    3
    4
    5
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    7
    6
    5
    4
    3
    2
    1
    0
    PACKET NUM
    STATUS
    CHECKSUM
    SoF Start of Frame. Always 0xFF.
    PACKET SIZE Total packet size in bytes.
    PACKET NUM The packet number of the packet that generated the response.
    STATUS See Return Status section below.
    CHECKSUM Checksum. Computed by adding all of the bytes in the packet in U8 form ignoring rollover.

    Return Status

    No function specific statuses. See return_status for universal return statuses.