Supported ICs

Ameba SoC

RTL8721Dx

RTL8726E

RTL8720E

RTL8730E

Supported

N

N

N

Y

Introduction

The EdDSA engine possesses a signature verification function and supports three signature verification modes:

  • Step Mode

  • Half-Auto Mode

  • Auto Mode

Half-Auto Mode is recommended, because in Auto Mode, the signature buffer and hash value need the same register, but the time to write signature buffer and hash is hard to control.

Note

  • The EdDSA can be accessed by NP and AP, but if multi-cores call the API to operate the EdDSA simultaneously, it will cause EdDSA function error.

  • Users must implement protective measures to ensure that only one core operates EdDSA at a certain time.

Usage

  1. Enabling Clock for EdDSA Engine

    Make sure that the function and clock of the EdDSA are enabled; otherwise, the function will hang.

    RCC_PeriphClockCmd(APBPeriph_ED25519, APBPeriph_CLOCK_NULL, ENABLE);

  2. Starting EdDSA Engine Calculation

    Initialize the parameters and call xxx() to start EdDSA engine calculation.