SPI Set Clock Frequency

Set the clock frequency for the specified SPI channel.

Command Packet

  • SPI Set Clock Frequency Command
  • SPI Set Clock Frequency Response
  • SPI Set Clock Frequency Command
    Description Set the clock frequency for the specified SPI channel.
    Size 12 Bytes
    Format
    0
    1
    2
    3
    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
    SoF : 0xFF
    PACKET SIZE : 0x0C
    PACKET NUM
    4
    5
    6
    7
    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
    CMD : 0x0102
    CHANNEL
    TARGET FREQ
    8
    9
    10
    11
    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
    TARGET FREQ
    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 SPI Open Command.
    CHANNEL SPI channel to configure.
    TARGET FREQ U32 target frequency in Hz (MSB first). Note, due to hardware limitations not all frequencies are achievable. Examine the response of this packet to see the actual achieved frequency.
    CHECKSUM Checksum. Computed by adding all of the bytes in the packet in U8 form ignoring rollover.

    ==== LINX Target ====6

    Developer Note

    Response Packet

    SPI Set Clock Frequency Response
    Description LINX device's response to SPI Set Clock Frequency command
    Size 10 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 : 0x0A
    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
    ACTUAL FREQ
    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
    ACTUAL FREQ
    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.
    ACTUAL FREQ U32 actual SPI clock frequency achieved.
    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.