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  • Product Series

    • FPGA+ARM

      • GM-3568JHF

        • 1. Introduction

          • GM-3568JHF Introduction
        • 2. Quick Start

          • 01 Environment Construction
          • 02 Compilation Instructions
          • 03 Burning Guide
          • 04 Debugging Tools
          • 05 Software Update
          • 06 View information
          • 07 Test Command
          • 08 Application Compilation
          • 09 Source code acquisition
        • 3. Peripherals and Interfaces

          • USB
          • Display and touch
          • Ethernet
          • WIFI
          • Bluetooth
          • TF-Card
          • Audio
          • Serial Port
          • CAN
          • RTC
        • 4. Application Development

          • 01 UART read and write case
          • 02 Key detection case
          • 03 LED light flashing case
          • 04 MIPI screen detection case
          • 05 Read USB device information example
          • 06 FAN Detection Case
          • 07 FPGA FSPI Communication Case
          • 08 FPGA DMA read and write case
          • 09 GPS debugging case
          • 10 Ethernet Test Cases
          • 11 RS485 reading and writing examples
          • 12 FPGA IIC read and write examples
          • 13 PN532 NFC card reader case
          • 14 TF card reading and writing case
        • 5. QT Development

          • 01 ARM64 cross compiler environment construction
          • 02 QT program added automatic startup service
        • 6. Others

          • 01 Modification of the root directory file system
          • 02 System auto-start service
    • ShimetaPi

      • M4-R1

        • Introduction

          • M4-R1 Introduction
        • Get started quickly

          • OpenHarmony概述
          • 镜像烧录
          • 开发环境准备
          • Hello World应用以及部署
        • Application Development

          • getting Started

            • 第一章 ArkTS语言简介
            • 第二章 UI组件介绍和实际应用(上)
            • 第三章 UI组件介绍和实际应用(中)
            • 第四章 UI组件介绍和实际应用(下)
          • Advanced

            • 第一章 入门指引
            • 第二章 三方库的引用和使用
            • 第三章 应用编译以及部署
            • 第四章 命令行恢复出厂设置
            • 第五章 系统调试--HDC调试
            • 第六章 APP 稳定性测试
            • 第七章 应用测试
        • Equipment Development

          • 第一章 环境搭建
          • 第二章 下载源码
          • 第三章 编译源码
        • Peripherals and interfaces

          • 树莓派接口
          • GPIO 接口
          • I2C 接口
          • SPI通信
          • PWM控制
          • 串口通讯
          • TF Card
          • 屏幕
          • 触摸
          • 音频
          • RTC
          • Ethernet
          • M.2
          • MINI-PCIE
          • Camera
          • WIFI&BT
          • 树莓派拓展板
        • Frequently asked questions

          • 资源下载
      • M5-R1

        • Introduction

          • Introduction to ShimetaPi M5-R1
    • OpenHarmony

      • SC-3568HA

        • Introduction

          • SC-3568HA Overview
        • Quick Start Guide

          • OpenHarmony Overview
          • Image Flashing
          • Setting Up the Development Environment
          • Hello World Application and Deployment
        • Application Development

          • ArkUI

            • Chapter 1 Introduction to ArkTS Language
            • Chapter 2 Introduction to UI Components and Practical Applications (Part 1)
            • Chapter 3 Introduction to UI Components and Practical Applications (Part 2)
            • Chapter 4 Introduction to UI Components and Practical Applications (Part 3)
          • Expand

            • Chapter 1 Getting Started Guide
            • Chapter 2 Referencing and Using Third-Party Libraries
            • Chapter 3: Application Compilation and Deployment
            • Chapter 4: Command-Line Factory Reset
            • Chapter 5: System Debugging -- HDC (Huawei Device Connector) Debugging
            • Chapter 6 APP Stability Testing
            • Chapter 7 Application Testing
        • Device Development

          • Chapter 1 Environment Setup
          • Chapter 2 Download Source Code
          • Chapter 3 Compiling Source Code
        • Peripheral And Iinterface

          • Raspberry Pi interface
          • GPIO Interface
          • I2C Interface
          • SPI communication
          • PWM (Pulse Width Modulation) control
          • Serial port communication
          • TF Card
          • Display Screen
          • Touch
          • Audio
          • RTC
          • Ethernet
          • M.2
          • MINI-PCIE
          • Camera
          • WIFI&BT
          • Raspberry Pi expansion board
        • Frequently Asked Questions

          • Resource Downloads
      • M-K1HSE

        • Introduction

          • M-K1HSE Introduction
        • Quick Start

          • Development environment construction
          • Source code acquisition
          • Compilation Notes
          • Burning Guide
        • Peripherals and interfaces

          • 01 Audio
          • 02 RS485
          • 03 Display
        • System customization development

          • System transplant
          • System customization
          • Driver Development
          • System Debugging
          • OTA Update
    • EVS-Camera

      • CF-NRS1

        • 1. Introduction

          • Event Camera Technical Documentation
        • 2. Quick Start

          • Host driver and software installation
        • 3. SDK application development

          • API Usage Instructions
      • CF-CRA2

        • Introduction

          • About CF-NRS1
    • AI-model

      • 1684XB-32T

        • Introduction

          • AIBOX-1684XB-32 Introduction
        • Get started quickly

          • First time use
          • Network Configuration
          • Disk usage
          • Memory allocation
          • Fan Strategy
          • Firmware Upgrade
        • Deployment Tutorial

          • Algorithm deployment
          • Deploy Llama3 Example
        • Application Development

          • Sophgo SDK Development
          • Sophon LLM_api_server development
          • Deploy MiniCPM-V-2_6
          • Qwen-2-5-VL Image and Video Recognition DEMO
          • Qwen3-chat-DEMO
          • Qwen3-Qwen Agent-MCP-Demo
          • Qwen3-langchain-AI Agent
      • 1684X-416T

        • Introduction

          • AIBOX-1684X-416 Introduction
        • Demo simple operation guide

          • Simple instructions for using shimeta smart monitoring demo
    • Core-Board

      • C-3568BQ

        • Introduction

          • C-3568BQ Overview
      • C-3588LQ

        • Introduction

          • C-3588LQ Introduction
      • GC-3568JBAF

        • Introduction

          • GC-3568JBAF Introduction
      • C-K1BA

        • Introduction

          • C-K1BA Introduction

触摸

1. I2C触摸

以M4-R1为例,该板卡目前拥有一组I2C接口的触摸接口,目前该接口适配的触摸驱动为gt9xx,该驱动为HDF框架下的驱动,驱动文件位于该路径:

  • drivers/hdf_core/framework/model/input/driver/touchscreen/touch_gt911.c

想了解更多关于HDF驱动框架可以参考该文章: https://blog.csdn.net/wobuzai11/article/details/135959347

接口位置如图:

TOOL

2. USB触摸

鸿蒙系统也支持USB触摸,当接入USB触摸时日志中会有以下打印:

    [ 1483.298817] usb 5-1: new full-speed USB device number 3 using xhci-hcd
    [ 1483.440164] usb 5-1: New USB device found, idVendor=10c4, idProduct=5e52, bcdDevice= 2.00
    [ 1483.440199] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    [ 1483.440207] usb 5-1: Product: TOUCH Devices
    [ 1483.440214] usb 5-1: Manufacturer: TOUCH FREE
    [ 1483.440220] usb 5-1: SerialNumber: MTD3210
    [ 1483.458133] input: TOUCH FREE  TOUCH Devices as /devices/platform/usbhost/fd000000.dwc3/xhci-hcd.4.auto/usb5/5-1/5-1:1.0/0003:10C4:5E52.0002/input/input8
    [ 1483.461402] hid-multitouch 0003:10C4:5E52.0002: input,hiddev96,hidraw1: USB HID v1.10 Device [TOUCH FREE  TOUCH Devices] on usb-xhci-hcd.4.auto-1/input0

3. 触摸调试

触摸屏属于input输入子系统设备,input子系统是Linux对输入设备提供的统一驱动框架。 如按键、键盘、触摸屏和鼠标等输入设备的驱动方式是类似的, 使用input子系统驱动的输入设备可以通过统一的数据结构提交给内核, 该数据结构包括输入的时间、类型、代号以及具体的键值或坐标, 内核通过/dev/input目录下的文件接口传递给用户空间。

input输入子设备系统可以通过getevent命令来获取设备上报给系统的事件

板卡中内置了 getevent命令,可以用该命令来调试触摸屏是否正常工作

    # getevent 获取所有input子设备,并监听所有设备上报事件
    ~# getevent
    add device 1: /dev/input/event7
    name:     "TOUCH FREE  TOUCH Devices"    # USB触摸
    add device 2: /dev/input/event6
    name:     "VSoC touchscreen"             # I2C触摸
    add device 3: /dev/input/event1
    name:     "fe6e0030.pwm"
    add device 4: /dev/input/event4
    name:     "Logitech USB Optical Mouse"
    add device 5: /dev/input/event3
    name:     "adc-keys"
    add device 6: /dev/input/event5
    name:     "rk-headset"
    add device 7: /dev/input/event0
    name:     "hdmi_cec_key"
    add device 8: /dev/input/event2
    name:     "rk805 pwrkey"
    # event6(触摸)上报
    /dev/input/event6: 0003 0036 000003a8
    /dev/input/event6: 0003 0039 00000000
    /dev/input/event6: 0000 0002 00000000
    /dev/input/event6: 0001 014a 00000001
    ......

    # getevent -l /dev/input/event* 监听子设备上报的事件类型
    ~# getevent -l /dev/input/event6
    EV_ABS       ABS_MT_POSITION_X    0000014c
    EV_ABS       ABS_MT_POSITION_Y    000002b8
    EV_ABS       ABS_MT_TRACKING_ID   00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_KEY       BTN_TOUCH            DOWN      #   手指按下
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_ABS       ABS_MT_POSITION_X    0000014c  #   X坐标
    EV_ABS       ABS_MT_POSITION_Y    000002b8  #   Y坐标
    EV_ABS       ABS_MT_TRACKING_ID   00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_ABS       ABS_MT_POSITION_X    0000014c
    EV_ABS       ABS_MT_POSITION_Y    000002b8
    EV_ABS       ABS_MT_TRACKING_ID   00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_ABS       ABS_MT_POSITION_X    0000014c
    EV_ABS       ABS_MT_POSITION_Y    000002b8
    EV_ABS       ABS_MT_TRACKING_ID   00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_KEY       BTN_TOUCH            UP        #   手指抬起
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000
    EV_SYN       SYN_MT_REPORT        00000000
    EV_SYN       SYN_REPORT           00000000

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Contributors: zwhuang
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