目標：用游戲手柄控制貪吃蛇

硬件平臺：imax6q

版本信息： arm-none-linux-gnueabi-gcc-4.8.3、 qt5.7.1、linux3.0.1

一、交叉編譯tslib1.4

由于 imax6q是 armv7-a 構架，所以以后的編譯我們都應編譯出 armv7 平臺的文件

編譯參數：

echo ‘ac_cv_func_malloc_0_nonnull=yes’ > arm-linux.cache

CFLAGS=-march=armv7-a ./configure -host=arm-linux -cache-file=arm-linux.cache -prefix=/usr/local/tslib_v7

編譯成功后 我們驗證下

二、編譯qt4.7.1

安裝依賴

apt-get install libxcb1 libxcb1-dev libx11-xcb1 libx11-xcb-dev libxcb-keysyms1 libxcb-keysyms1-dev libxcb-image0 libxcb-image0-dev libxcb-shm0 libxcb-shm0-dev libxcb-icccm4 libxcb-icccm4-dev libxcb-xfixes0-dev libxrender-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0 libxcb-render-util0-dev libxcb-glx0-dev libxcb-xinerama0-dev xorg-dev zlib1g-dev

修改qtbase/mkspecs/linux-arm-gnueabi-g++/qmake.conf

# # qmake configuration for building with arm-linux-gnueabi-g++ #MAKEFILE_GENERATOR = UNIX CONFIG += incremental QMAKE_INCREMENTAL_STYLE = sublibQT_QPA_DEFAULT_PLATFORM = linux #eglfs QMAKE_CFLAGS_RELEASE += -O2 -march=armv7-a QMAKE_CXXFLAGS_RELEASE += -O2 -march=armv7-ainclude(../common/linux.conf) include(../common/gcc-base-unix.conf) include(../common/g++-unix.conf)# modifications to g++.conf QMAKE_CC = arm-none-linux-gnueabi-gcc QMAKE_CXX = arm-none-linux-gnueabi-g++ QMAKE_LINK = arm-none-linux-gnueabi-g++ QMAKE_LINK_SHLIB = arm-none-linux-gnueabi-g++# modifications to linux.conf QMAKE_AR = arm-none-linux-gnueabi-ar cqs QMAKE_OBJCOPY = arm-none-linux-gnueabi-objcopy QMAKE_NM = arm-none-linux-gnueabi-nm -P QMAKE_STRIP = arm-none-linux-gnueabi-strip load(qt_config)

下面是我的配置腳本

#!/bin/sh./configure \-v \ -prefix /opt/armv7_qt-5.7.0 \ -release \ -opensource \ -make libs \ -xplatform linux-arm-gnueabi-g++ \ -optimized-qmake \ -pch \ -qt-sql-sqlite \ -qt-libjpeg \ -qt-zlib \ -no-opengl \ -skip qt3d \ -skip qtcanvas3d \ -skip qtpurchasing \ -no-sse2 \ -no-openssl \ -no-nis \ -no-cups \ -no-glib \ -no-iconv \ -nomake examples \ -nomake tools \ -skip qtvirtualkeyboard \ -I/usr/local/tslib_v7/include \ -L/usr/local/tslib_v7/lib exit

這是我的arm環境變量

export TSLIB_ROOT=/opt/tslib1.4 export QT_ROOT=/opt/qt-5.7.0 export TSLIB_TSDEVICE=/dev/input/event2 export TSLIB_TSEVENTTYPE=input export TSLIB_CONFFILE=/opt/tslib1.4/etc/ts.conf export TSLIB_PLUGINDIR=/opt/tslib1.4/lib/ts export TSLIB_CONSOLEDEVICE=none export TSLIB_FBDEVICE=/dev/fb0 export QWS_MOUSE_PROTO=tslib:/dev/input/event2 export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:$QT_ROOT/lib:$TSLIB_ROOT/lib:$TSLIB_ROOT/lib/ export QT_QPA_PLATFORM_PLUGIN_PATH=$QT_ROOT/plugins #很重要 export QT_QPA_PLATFORM=linuxfb:tty=/dev/fb0 export QT_QPA_FONTDIR=$QT_ROOT/lib/fonts export QT_QPA_GENERIC_PLUGINS=tslib export QWS_USB_KEYBOARD=/dev/input/event4 #鍵盤支持

具體編譯過程我就不再細說，網上教程很多

http://blog.csdn.net/u012175418/article/details/52704734

完了后在主機配置QT

主要是要指定 交叉編譯器的gcc、g++，和qt的qmake

驅動移植

對于驅動想法我是 用 內核的usbmouse.c 為模版，進行修改，由于前期在做游戲手柄驅動時遇到技術問題，我暫時改用 鼠標模擬鍵盤， 左鍵、右鍵、中鍵、pid 鍵 分別對應 A、D、W、S。用的典型的 usb + input 系統。

主要修改 中斷函數

static void usb_mouse_irq(struct urb *urb) {struct usb_mouse *mouse = urb->context;signed char *data = mouse->data;struct input_dev *dev = mouse->dev;int status;static unsigned char pre_val;char flag = 255;switch (urb->status) {case 0: /* success */break;case -ECONNRESET: /* unlink */case -ENOENT:case -ESHUTDOWN:return;/* -EPIPE: should clear the halt */default: /* error */goto resubmit;}if ((pre_val & (1<<0)) != (data[0] & (1<<0))){/* 左鍵發生了變化 */printk("L KEY \n");input_event(dev, EV_KEY, KEY_A, (data[0] & (1<<0)) ? 1 : 0);input_sync(dev);}if ((pre_val & (1<<1)) != (data[0] & (1<<1))){/* 右鍵發生了變化 */input_event(dev, EV_KEY, KEY_D, (data[0] & (1<<1)) ? 1 : 0);input_sync(dev);}if (data[2] == 0x15){/* 中鍵發生了變化 */input_event(dev, EV_KEY, KEY_W, 1);input_event(dev, EV_KEY, KEY_W, 0);input_sync(dev);}pre_val = data[0];if (data[2] == 0x1f ){//printk("orange down");//pre_val = 0x1f;flag = 's';input_event(dev, EV_KEY, KEY_S, 1);input_event(dev, EV_KEY, KEY_S, 0);input_sync(dev);}

input 的初始化也得改

input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);/*input_dev->keybit[BIT_WORD(KEY_W)] = BIT_MASK(KEY_A) |BIT_MASK(KEY_D) | BIT_MASK(KEY_S);input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |BIT_MASK(BTN_EXTRA);input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);*///set_bit(KEY_A, input_dev->keybit);for (i = 0; i < 255; i++)set_bit(usb_kbd_keycode[i], input_dev->keybit);

這里的usb_kbd_key_code 是借用usb鍵盤的代碼。

附上測試視屏 (在文章底部，這是我的另一個博客)

歡迎大家留言提問交流

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