Microchip SAMV71Q21ET Manual

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SMART ARM-based Microcontrollers

AT17629: SAM E70/V70 Ethernet Bootloader

APPLICATION NOTE

Introduction

The Atmel® | SMART ARM® Cortex®-M7 based MCUs deliver the highest

performing Cortex-M7 based MCUs to the market with an exceptional

memory and connectivity options for design flexibility making them ideal for

the automotive, IoT, and industrial connectivity markets. The ARM Cortex-M7

architecture enhances performance and at the same time keeps the cost

and power consumption under control.

Microcontrollers are used in a variety of electronic products. The devices are

becoming more flexible due to the reprogrammable memory (Flash memory)

often used to store the firmware of the product. This enables the firmware in

a device to be upgraded in the field for correcting bugs or adding new

functionalities.

Features

This application note provides an Ethernet-based bootloader implementation

for Atmel SAM V7/E7 ARM Cortex-M7 based microcontrollers. It also

discusses the boot sequence, upgrade sequence, safety, and security in

bootloaders.

Atmel-42782A-SAM-V70-E70-Ethernet-Bootloader_AT17629_Application Note-09/2016

Table of Contents

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

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

1. Abbreviations.............................................................................................................3

2. Bootloader................................................................................................................. 4

2.1. Boot Sequence.............................................................................................................................4

2.2. Upgrade Sequence.......................................................................................................................4

2.3. Safety........................................................................................................................................... 5

2.4. Security.........................................................................................................................................5

3. TFTP Protocol............................................................................................................9

3.1. TFTP Packets...............................................................................................................................9

3.2. TFTP Option Extensions............................................................................................................ 10

3.3. TFTP Option Negotiation............................................................................................................ 11

4. Example Bootloader and User Application.............................................................. 12

4.1. Hardware/Software Requirements............................................................................................. 12

4.2. Design Considerations............................................................................................................... 12

4.3. Software Architecture................................................................................................................. 13

5. Firmware Packager..................................................................................................23

5.1. Generate Configuration and Image Files................................................................................... 23

5.2. Setup tftpd64 Server Application................................................................................................24

6. Running Example Bootloader and User Application................................................27

7. References.............................................................................................................. 28

8. Revision History.......................................................................................................29

Atmel AT17629: SAM E70/V70 Ethernet Bootloader [APPLICATION NOTE]

Atmel-42782A-SAM-V70-E70-Ethernet-Bootloader_AT17629_Application Note-09/2016

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SAMV71Q21ET

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