sfdpPresent (SPIFlash)

Signatures

• bool SPIFlash::sfdpPresent(void)

What It Is For

Check whether Serial Flash Discoverable Parameters (SFDP) are present and readable on the connected flash chip.

Parameters

• No parameters.

Behavior Details

SFDP presence can improve compatibility and timing/erase parameter discovery on supported parts.

Return Semantics

Returns true if SFDP was detected/read, else false.

Failure Behavior

false may be normal on older/non-SFDP chips. It is not automatically a fatal error if chip ID and operations still work.

Common Mistakes

• Treating false as immediate hard failure on chips that do not expose SFDP.
• Skipping JEDEC/basic comm checks because SFDP is present.
• Assuming SFDP guarantees all opcodes are supported the same way.

Choosing Between Similar APIs

• Use sfdpPresent() to detect optional advanced parameter support.
• Use getJEDECID() for baseline identification regardless of SFDP.
• Do not gate all functionality solely on SFDP presence.

Example

if (flash.sfdpPresent()) {
  Serial.println("SFDP available");
} else {
  Serial.println("SFDP not available");
}