Microchip ATAES132A Manual de Usario

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Atmel CryptoAuthentication

ATAES132A Firmware Development Library

USER GUIDE

Introduction

This user guide describes how to use the Atmel® CryptoAuthentication™

ATAES132A Firmware Development Library with a customized security

project and how to tune it towards the hardware. To fully understand this

document, it is required to have the library code base.

The ATAES132A is fully backwards compatible with the ATAES132. As a

result, the ATAES132A library is an extension of the ATAES132 library.

There are additional definitions added into ATAES132 library to support

ATAES132A specific commands.

Features

•Layered and Modular Design

•Compact and Optimized for 8- and 32-bit Microcontrollers

•Easy to Port

•Supports I2C and SPI Communication

•Distributed as Source Code

Atmel-8759A-CryptoAuth-ATAES132A-FW-Dev-Library_User Guide-01/2016

Table of Contents

Introduction......................................................................................................................1

Features.......................................................................................................................... 1

1. Overview....................................................................................................................3

1.1. Layered Design............................................................................................................................ 3

1.1.1. Physical Layer............................................................................................................... 4

1.1.2. Communication Layer....................................................................................................4

1.1.3. Command Marshaling Layer..........................................................................................4

1.1.4. Application Layer........................................................................................................... 4

1.2. Portability......................................................................................................................................4

1.3. Robustness...................................................................................................................................5

1.4. Optimization..................................................................................................................................5

2. Project........................................................................................................................6

2.1. Example Projects..........................................................................................................................6

2.2. Project Integration........................................................................................................................ 6

2.2.1. Folder Structure............................................................................................................. 6

2.2.2. Porting........................................................................................................................... 6

3. Tuning........................................................................................................................9

3.1. Removal of Command Marshaling Layer..................................................................................... 9

3.2. Removal of Communication Layer............................................................................................... 9

3.3. I2C Interface Using GPIO aka "bit-bang" Instead of I

2C Hardware.............................................. 9

4. Revision History.......................................................................................................10

Atmel ATAES132A Firmware Development Library [USER GUIDE]

Atmel-8759A-CryptoAuth-ATAES132A-FW-Dev-Library_User Guide-01/2016

1. Overview

1.1. Layered Design

The library consists of logically layered components in each successive layer. Since the library is

distributed as C source code, a customer application project can use or include specific parts of the

library code. For instance, compile and link the command marshaling layer functionality or exclude it. For

an embedded application that only wants authentication from the device, it would make sense for that

application to construct the byte stream per the device specification and communicate directly with the

silicon via one of the communication methods available. This would generate the smallest code size and

simplest code.

Figure 1-1. ATAES132A Library Architecture

Devices

Physical,

Hardware

Independent

Command

Marshaling

Application

Physical,

Hardware

Dependent

Communication

(spi_phys.c)

(i2c_phys.c)

(aes132_spi.c)

Commands (aes132_comm_marshaling.c)

Customer

(aes132_i2c.c)

Additional

ATAES132A

Application

aes132m_write_memory(),aes132m_read_memory(),aes132M_execute()

Communications Interface (aes_comm.c)

aes132c_wakeup(), aes132c_send_and_receive(), aes132c_calculate_crc()

I2C Interface

Single Perpheral Interface

Atmel ATAES132A Firmware Development Library [USER GUIDE]

Atmel-8759A-CryptoAuth-ATAES132A-FW-Dev-Library_User Guide-01/2016

Especificaciones del producto

Marca:	Microchip
Categoría:	No categorizado
Modelo:	ATAES132A
Color del producto:	Zwart
Peso.:	549 g
Ancho:	127 mm
Profundidad:	127 mm
Altura:	114 mm
Bluetooth:	Nee
Tipo de fuente de energía:	AC
Número de puertos USB 2.0:	1
hdmi:	Nee
Compatibilidad de marca:	Apple
Controlado remotamente:	Ja
Compatibilidad:	iPod Nano 7, iPod Touch 5, iPhone 5
Tipo de conector de acoplamiento:	Apple Lightning
voltaje-de-entrada-de-CA:	100-240 V