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spec spi set bit order

Ken Sharp edited this page Dec 10, 2025 · 2 revisions

SPI Bit order

Set the bit order of the specified SPI Channel.

LabVIEW

Command Packet

SPI Set Bit Order Command
Description Set the bit order of the specified SPI Channel.
Size Variable
Format 0 1 2 3 4 5 6 7 8
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 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 7 6 5 4 3 2 1 0
SoF : 0xFF PACKET SIZE PACKET NUM CMD : 0x0101 CHANNEL BIT ORDER 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 Set Bit Order Command.
CHANNEL SPI channel.
BIT ORDER SPI bit order. 0 = LSb first. 1 = MSb first.
CHECKSUM Checksum. Computed by adding all of the bytes in the packet in U8 form ignoring rollover.

LINX Target

Response Packet

SPI Open Response
Description LINX device's response to SPI Open command
Size 6 Bytes
Format 0 1 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 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
SoF : 0xFF PACKET SIZE 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.

Related Links

LINX

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