nxp-PIN Pad Point of Sale (POS) Solution
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© 2017 NXP B.V.
Linux Point of Sale (LPOS) Reader Solution
User’s Guide
1. Introduction
The Linux Point of Sale (LPOS) Reader Solution is a
collection of hardware, software enablement, middleware
and specialized segment-specific software for the point-
of-sale market. This document provides detailed
information about the hardware, software building blocks
and examples provided with the solution as well as a
blueprint for developing custom POS applications based
on this software.
2. Hardware Overview
The Linux POS Reader Solution is fully assembled and
loaded with software at the factory. This section describes
each piece of the solution and its configuration settings.
The fully assembled hardware is pictured below in Figure
1.
NXP Semiconductors
Document Number: LPOSRS003SUG
Solution User’s Guide
Rev. 2,
04/2018
Contents
1. Introduction ........................................................................ 1
2. Hardware Overview ........................................................... 1
TWR-POS-i.MX6UL .............................................. 2
Security architecture description for iMX6UL
processor ............................................................................... 3
TWR-iMX (SOM Base board for iMX6) ................ 4
3. Software Overview ............................................................ 7
Software Layers ...................................................... 7
OPTEE Architecture ............................................... 9
NXP Modules for LPOS Applications .................. 10
4. Build system setup ........................................................... 11
Prerequisites .......................................................... 11
Building the project .............................................. 12
Code repositories and their Yocto recipes ............. 13
Working with Yocto ............................................. 16
5. Secure Boot Flow ............................................................. 20
Introduction........................................................... 20
Implementation ..................................................... 20
Updating the OPTEE/Linux keys.......................... 23
6. Secure screen generation .................................................. 24
Introduction........................................................... 24
Implementation ..................................................... 24
Adding/Updating a Secure Screen ........................ 25
7. ISDM - Inter Services Domain Manager ........................ 26
Introduction........................................................... 26
Implementation ..................................................... 26
8. Tamper ............................................................................. 27
Introduction........................................................... 27
Implementation ..................................................... 27
9. Running Demo Scenarios ................................................. 28
10. Revision history ............................................................... 28
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