Microchip ATMXT448UD Manual

Microchip Ikke kategoriseret ATMXT448UD

Læs gratis den danske manual til Microchip ATMXT448UD (20 sider) i kategorien Ikke kategoriseret. Denne vejledning er vurderet som hjælpsom af 24 personer og har en gennemsnitlig bedømmelse på 4.6 stjerner ud af 12.5 anmeldelser. Har du et spørgsmål om Microchip ATMXT448UD, eller vil du spørge andre brugere om produktet?

Download PDF

Side 1/20

 2019 Microchip Technology Inc. DS00003084A-page 1

TABLE OF CONTENTS

1.0 Introduction ................................................................................................................................................................. 1

1.1 SAMA5D3 Xplained Board ............................................................................................................................... 2

1.2 SAM Boot Assistance (SAM-BA) ...................................................................................................................... 2

1.3 Putty Terminal Program .................................................................................................................................... 3

1.4 Github Repository – maXTouch_linux .............................................................................................................. 4

2.0 Building the source and setting up the tools ................................................................................................................ 5

2.1 Device Tree Files .............................................................................................................................................. 5

2.1.1 at91-sama5d3_xplained_dm_pda4.dtsi ................................................................................................ 5

2.1.2 at91-sama5d3_xplained_pda4.dts ....................................................................................................... 5

2.2 Configuring the Kernel Options ......................................................................................................................... 5

2.3 Loading the Touch Driver as a Module ............................................................................................................. 6

2.4 Building the Kernel ............................................................................................................................................ 6

2.5 Modifying the U-boot-env.txt File ...................................................................................................................... 7

2.6 Programming the SAMA5D3 Xplained Board ................................................................................................... 8

3.0 maXTouch Linux Driver ............................................................................................................................................... 9

3.1 I2C Driver – atmel_mxt_ts.c .............................................................................................................................. 9

3.2 Object-based Protocol ...................................................................................................................................... 9

3.3 Power Up and Reset ......................................................................................................................................... 9

3.4 Downloading the Configuration ......................................................................................................................... 9

3.4.1 triggering configuration download with sysfs ...................................................................................... 10

3.4.2 Automatically downloading the configuration on driver probe ............................................................ 10

3.5 Firmware Upgrade .......................................................................................................................................... 10

4.0 Debugging the Driver ................................................................................................................................................ 12

4.1 Enabling Driver Debug Messages – dev_dbg ................................................................................................ 12

4.2 Viewing Touch Events – evtest ....................................................................................................................... 12

4.3 Viewing Touch Events – Android getevent ..................................................................................................... 13

4.4 Debug File System Interface – sysfs .............................................................................................................. 14

4.4.1 mem_access ...................................................................................................................................... 15

4.4.2 debug_enable ..................................................................................................................................... 15

4.5 Improved Debug Interface .............................................................................................................................. 15

4.6 The mxt-app Utility .......................................................................................................................................... 15

Appendix A. Revision History .............................................................................................................................................. 18

1.0 INTRODUCTION

This application note introduces the maXTouch Linux driver, its features and available debug options to help developers

with driver integration. It also provides details on how to configure and build the kernel on a test platform.

The maXTouch Linux driver is designed to support the Linux input subsystem. This driver resides in the drivers/input/

touchscreen directory of the kernel and interfaces with the hardware to generate 2D touch events to the Linux input

subsystem.

The Linux driver can be compiled as an in-built driver or as a module to be loaded after the initial kernel boot. The

application note provides details regarding function of the driver and the debug options that are available through the

touch driver along with information regarding the testing of the touch driver.

This application note assumes that the user has a Linux based PC (either actual or a virtual machine) and has basic

knowledge of the Linux OS. It also assumes basic use of Github. All testing has been done using the Ubuntu OS version

16.04. Any critical libraries or tools that need to be installed will be mentioned in this application note.

The details within this document will mainly reference the standard Linux kernel. Where possible, differences between

the Linux “distributions” (for example, Ubuntu, Android) in terms of tools, directory locations or behavior will be noted.

AN3084

Using the maXTouch Linux Driver

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	ATMXT448UD

Har du brug for hjælp?

Hvis du har brug for hjælp til Microchip ATMXT448UD stil et spørgsmål nedenfor, og andre brugere vil svare dig

Dit navn*

Din email*

Skriv dit spørgsmål her

Ikke kategoriseret Microchip Manualer

Microchip M2GL060 Manual

2 December 2025

Microchip RTPF500TS Manual

2 December 2025

Microchip M1A3P600L Manual

1 December 2025

Microchip M2S090TS Manual

1 December 2025

Microchip M1A3P1000L Manual

1 December 2025

Microchip M2S090 Manual

30 November 2025

Microchip A3PE3000L Manual

30 November 2025

Microchip HC12-100S0s Manual

30 November 2025

Microchip M2GL010T Manual

29 November 2025

Microchip M2GL150T Manual

29 November 2025

Ikke kategoriseret Manualer

Nyeste Ikke kategoriseret Manualer

Vinotemp BR-RETRO-01-W Manual

17 December 2025

NightStick INTRANT XPP-5566RX Manual

17 December 2025

Vaxcel T0690 Manual

17 December 2025

Silverstone TS12 Manual

17 December 2025

TOTO Silas TS210P Manual

17 December 2025

Wine-Mate WM-8500DS Manual

17 December 2025

Arçelik A75L 8870 5B Manual

17 December 2025

Dals RWS48-CC Manual

17 December 2025

Vinotemp BR-30SSGG Manual

17 December 2025

Gamdias Aura GC1 Elite Manual

17 December 2025