SPIFram Constructors

Signatures

• SPIFram(uint8_t cs = CS)
• SPIFram(uint8_t cs, SPIClass *spiinterface) (supported boards)

What It Is For

Construct a SPIFram object and choose which SPI bus and chip-select pin are used to access FRAM.

Parameters

• cs: Chip-select pin connected to FRAM chip CS.
• spiinterface: Optional bus pointer for multi-SPI boards.

Behavior Details

Construction only stores interface wiring. Hardware probing, device identification, and readiness checks happen in begin().

Return Semantics

Constructors do not return values; they prepare the instance.

Failure Behavior

Incorrect bus/pin choices usually surface during begin() with zero IDs or non-zero error codes.

Common Mistakes

• Using incorrect CS pin or alternate bus for your board wiring.
• Assuming constructor validates wiring immediately (validation happens at begin()).
• Reusing examples with different board pin numbering conventions without adjustment.

Choosing Between Similar APIs

• Use default constructor for single-bus setups.
• Use alternate bus constructor only when your board/core supports extra SPI instances.
• Pick constructor based on wiring first, not performance assumptions.

Example

#include <SPIMemory.h>

SPIFram fram(10);
// SPIFram fram(5, &SPI1);