129 lines
4.9 KiB
Bash
129 lines
4.9 KiB
Bash
#!/bin/bash
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# 退出码说明
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# 0 - 成功
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# 1 - 错误：等待TTY设备就绪超时
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# 2 - 错误：未找到CH343驱动
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# 3 - 错误：未找到含Qingheng的USB设备
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# 4 - 错误：未找到对应USB地址
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# 5 - 错误：未找到cdc_acm绑定的对应USB设备
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# 6 - 错误：解绑cdc_acm驱动失败
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# 7 - 错误：绑定usb_ch343驱动失败
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# 变量设置
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TTY_DEVICE="/dev/ttyACM*" # 替换为你要等待的tty设备路径
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CDC_ACM_PATH="/sys/bus/usb/drivers/cdc_acm"
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USB_CH343_PATH="/sys/bus/usb/drivers/usb_ch343"
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CHECK_INTERVAL=1 # 检查设备就绪的时间间隔（秒）
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MAX_WAIT_SECONDS=30 # 最大等待时间（秒），0表示无限等待
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# 初始化变量
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start_time=$(cut -d. -f1 /proc/uptime)
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current_time=0
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qinheng_id=""
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usb_address=""
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vendor_id=""
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product_id=""
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cdc_acm_sub_addr=""
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# ----------------- 1. 等待TTY设备就绪 -----------------
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# 循环等待tty设备就绪（检查设备节点是否存在+是否可读写）
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while true; do
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for dev in /dev/ttyACM*; do
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[ -e "$dev" ] || continue
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if [ -c "$dev" ] && [ -r "$dev" ] && [ -w "$dev" ]; then
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echo "[雷达驱动自动切换程序] 设备 $dev 已就绪！" > /dev/kmsg
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TTY_DEVICE="$dev"
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break 2 # 跳出两层循环
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fi
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done
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if [ ${MAX_WAIT_SECONDS} -gt 0 ]; then
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current_time=$(cut -d. -f1 /proc/uptime)
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elapsed_seconds=$((current_time - start_time))
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if [ ${elapsed_seconds} -ge ${MAX_WAIT_SECONDS} ]; then
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echo "[雷达驱动自动切换程序] 错误：等待 ${TTY_DEVICE} 超时（${MAX_WAIT_SECONDS}秒）！" > /dev/kmsg
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exit 1
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fi
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echo "[雷达驱动自动切换程序] 仍在等待${TTY_DEVICE}（已等待${elapsed_seconds}秒）..." > /dev/kmsg
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fi
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sleep ${CHECK_INTERVAL}
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done
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# ------ 2. 查看CH343是否存在 ------
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if ls /sys/bus/usb/drivers/usb_ch343 > /dev/null 2>&1; then
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echo "[雷达驱动自动切换程序] 检测到CH343驱动存在，继续执行..." > /dev/kmsg
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else
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echo "[雷达驱动自动切换程序] 错误：未找到CH343驱动！" > /dev/kmsg
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exit 2
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fi
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# ------------- 3. 查找Qingheng对应的usb接口 -------------
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echo "[雷达驱动自动切换程序] 开始提取QinHeng设备ID..." > /dev/kmsg
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# 执行lsusb并过滤含QinHeng的行，提取ID（核心逻辑）
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qinheng_id=$(lsusb | grep "QinHeng" | awk '{print $6}' | head -n 1)
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# 检查是否提取到ID
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if [ -z "${qinheng_id}" ]; then
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echo "[雷达驱动自动切换程序] 错误：未找到含QinHeng的USB设备！" > /dev/kmsg
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exit 3
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else
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echo "[雷达驱动自动切换程序] 成功提取QinHeng设备ID：${qinheng_id}" > /dev/kmsg
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# 将ID拆分为vendor_id和product_id
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vendor_id=$(echo "${qinheng_id}" | cut -d ':' -f 1)
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product_id=$(echo "${qinheng_id}" | cut -d ':' -f 2)
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fi
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# -------------------- 4. 提取USB地址 --------------------
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echo "[雷达驱动自动切换程序] 开始查找idVendor=${vendor_id},idProduct=${product_id}的USB地址..." > /dev/kmsg
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# 核心命令：过滤dmesg日志，提取USB地址
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usb_address=$(dmesg | grep -E "idVendor=${vendor_id}, idProduct=${product_id}" | grep -oE "usb [0-9]+-[0-9.]+:" | awk '{print $2}' | sed 's/://' | tail -n 1)
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# 检查是否提取到USB地址
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if [ -z "${usb_address}" ]; then
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echo "[雷达驱动自动切换程序] 错误：未找到对应USB地址" > /dev/kmsg
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exit 4
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else
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echo "[雷达驱动自动切换程序] 成功找到USB地址：${usb_address}" > /dev/kmsg
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fi
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# ---- 5. 找到cdc_acm驱动对应的usb设备 ----
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echo "[雷达驱动自动切换程序] 开始从${CDC_ACM_PATH}提取${usb_address}对应的子地址..." > /dev/kmsg
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cdc_acm_sub_addr=$(ls "${CDC_ACM_PATH}" 2>/dev/null | grep "^${usb_address}:" | head -n 1)
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if [ -z "${cdc_acm_sub_addr}" ]; then
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echo "[雷达驱动自动切换程序] 错误：${CDC_ACM_PATH}中未找到${usb_address}绑定的对应USB设备" > /dev/kmsg
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exit 5
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else
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echo "[雷达驱动自动切换程序] 成功提取cdc_acm子地址：${cdc_acm_sub_addr}" > /dev/kmsg
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fi
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# 6. 切换驱动
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echo "[雷达驱动自动切换程序] 开始切换cdc_acm驱动到USB地址${usb_address}..." > /dev/kmsg
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echo "${cdc_acm_sub_addr}" | sudo tee "${CDC_ACM_PATH}/unbind" 2>/dev/null
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if [ $? -eq 0 ]; then
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echo "[雷达驱动自动切换程序] 成功解绑cdc_acm驱动：${cdc_acm_sub_addr}" > /dev/kmsg
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else
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echo "[雷达驱动自动切换程序] 错误：解绑cdc_acm驱动失败" > /dev/kmsg
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exit 6
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fi
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echo "${cdc_acm_sub_addr}" | sudo tee "${USB_CH343_PATH}/bind" 2>/dev/null
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if [ $? -eq 0 ]; then
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echo "[雷达驱动自动切换程序] 成功绑定usb_ch343驱动：${cdc_acm_sub_addr}" > /dev/kmsg
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else
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echo "[雷达驱动自动切换程序] 错误：绑定usb_ch343驱动失败（检查驱动是否加载）" > /dev/kmsg
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exit 7
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fi
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# 执行完成
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echo "[雷达驱动自动切换程序] 雷达驱动自动切换完毕！" > /dev/kmsg
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exit 0 |