SPI Constants

This page aggregates all SPI-related constants used by functions and methods from the C and C++ APIs.

group SPI-related constants

SPI Target Mode

Enumerations selecting the behavior of the device while acting as an SPI target.

enum SpiTargetModel

Device emulation model presented on the bus while in SPI target mode.

Values:

enumerator SPI_TARGET_MODEL_MEMORY: Full-duplex arena with an auto-incrementing pointer.

enumerator SPI_TARGET_MODEL_FLASH: 25-series SPI-flash command set (opcode + address + data).

enumerator SPI_TARGET_MODEL_REGISTER_MAP: SPI-sensor convention: R/W bit + register address, then streamed.

enum SpiTargetEngine

Service engine for the MEMORY model (ignored by FLASH/REGISTER_MAP, which are always ISR-driven).

Values:

enumerator SPI_TARGET_ENGINE_DMA: Hardware-serviced via a gapless descriptor chain (default, fastest).

enumerator SPI_TARGET_ENGINE_ISR: Interrupt-serviced; frees the DMA channels for other use.

Enums

enum SpiBitOrder

This enum represents the SPI bit transmission order.

Values:

enum SpiMode

This enum represents the SPI clock polarity and phase modes.

Values:

enum SpiDataWidth

This enum represents the SPI data word size.

Values:

enum SpiChipSelect

This enum represents the available SPI chip select lines.

Values:

enum SpiChipSelectPolarity

This enum represents the SPI chip select active polarity.

Values: