Ubuntu读取PS4手柄

链接

长安手柄的share键和PS键直到手柄快闪两次反复，配对状态
使用bluetoothctl工具
命令行敲击之后，输入power on
agent on
default-agent
scan on
找到名字（最右边一列）中带有Wireless Controller字样的设备
与之MAC地址配对pair XX:XX:XX:XX:XX:XX
然后connect XX:XX:XX:XX:XX:XX
第二次链接
按一次PS键，白灯呼吸闪烁即可
可能需要执行power on
同样使用bluetoothctl工具如上
输入命令查看配对的设备：paired-devices
connect XX:XX:XX:XX:XX:XX
使用trust <MAC地址>的方式信任设备
读取
使用sudo evtest查看手柄状态
6是触控板，8是按钮（不包括左边的四个方向键）
例子

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <libevdev/libevdev.h>

void print_event(struct input_event *ev) {
    if (ev->type == EV_ABS) {
        switch (ev->code) {
            case ABS_X:
                printf("Left stick X: %d\n", ev->value);
                break;
            case ABS_Y:
                printf("Left stick Y: %d\n", ev->value);
                break;
            case ABS_RX:
                printf("Right stick X: %d\n", ev->value);
                break;
            case ABS_RY:
                printf("Right stick Y: %d\n", ev->value);
                break;
            case ABS_Z:
                printf("Left trigger: %d\n", ev->value);
                break;
            case ABS_RZ:
                printf("Right trigger: %d\n", ev->value);
                break;
        }
    } else if (ev->type == EV_KEY) {
        switch (ev->code) {
            case BTN_A:
                printf("Cross button: %s\n", ev->value ? "pressed" : "released");
                break;
            case BTN_B:
                printf("Circle button: %s\n", ev->value ? "pressed" : "released");
                break;
            case BTN_X:
                printf("Square button: %s\n", ev->value ? "pressed" : "released");
                break;
            case BTN_Y:
                printf("Triangle button: %s\n", ev->value ? "pressed" : "released");
                break;
        }
    }
}

int main() {
    struct libevdev *dev = NULL;
    // eventX要用sudo evtest自己看
    int fd = open("/dev/input/eventX", O_RDONLY | O_NONBLOCK);
    if (fd < 0) {
        perror("Failed to open device");
        return 1;
    }

    int rc = libevdev_new_from_fd(fd, &dev);
    if (rc < 0) {
        fprintf(stderr, "Failed to init libevdev (%s)\n", strerror(-rc));
        return 1;
    }

    printf("Input device name: \"%s\"\n", libevdev_get_name(dev));

    while (1) {
        struct input_event ev;
        rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_NORMAL, &ev);
        if (rc == 0) {
            print_event(&ev);
        } else if (rc != -EAGAIN) {
            fprintf(stderr, "Failed to read next event (%s)\n", strerror(-rc));
            break;
        }

        usleep(10000);  // Sleep for 10ms to reduce CPU usage
    }

    libevdev_free(dev);
    close(fd);
    return 0;
}

链接

第二次链接

读取