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优化usb外设插入时重复触发的问题

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tang1219
2026-06-16 14:07:40 +08:00
parent 98390053fd
commit 34157e19da
1 changed files with 28 additions and 20 deletions
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opt/ktouch/src/usb_ds.c
+28 -20
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@@ -16,6 +16,7 @@
#define DEFAULT_POLL_INTERVAL 5 // 默认轮询间隔为5秒
#define MAX_RETRY_ATTEMPTS 3 // 最大重试次数
#define RETRY_DELAY 1 // 重试延迟(秒)
#define COOLDOWN_SECONDS 30 // 触摸屏检测冷却时间(秒)
FILE *log_file = NULL; // 日志文件指针
// 函数提前声明
@@ -213,6 +214,7 @@ void monitor_usb_devices(const char *control_file_path, int poll_interval) {
printf("按Ctrl+C退出\n\n");
// 主循环，监控设备事件
time_t last_trigger_time = 0; // 上次触发控制文件的时间
while (keep_running) {
fd_set fds;
struct timeval tv;
@@ -292,28 +294,34 @@ void monitor_usb_devices(const char *control_file_path, int poll_interval) {
}
}
// 一轮检测完成后，如果需要更新控制文件状态
// 一轮检测完成后，如果需要更新控制文件状态（带冷却时间防重复触发）
if (use_control_file && touchscreen_detected) {
if (write_file_content_with_retry(control_file_path, 1) == 0) {
log_message("已更新控制文件状态为1\n");
// 等待文件状态恢复为0
printf("等待控制文件状态恢复为0...\n");
while (keep_running) {
int current_status = read_file_content_with_retry(control_file_path);
if (current_status == 0) {
printf("控制文件状态已恢复为0，继续监控\n");
break;
} else if (current_status == -1) {
printf("读取控制文件失败，等待%d秒后重试\n", poll_interval);
sleep(poll_interval);
} else {
printf("当前控制文件状态: %d，等待%d秒后检查\n", current_status, poll_interval);
sleep(poll_interval);
}
}
time_t now = time(NULL);
if (difftime(now, last_trigger_time) < COOLDOWN_SECONDS) {
log_message("冷却中，跳过本次触发（距上次 %.0f 秒）\n", difftime(now, last_trigger_time));
} else {
log_message("更新控制文件状态失败\n");
if (write_file_content_with_retry(control_file_path, 1) == 0) {
last_trigger_time = time(NULL);
log_message("已更新控制文件状态为1\n");
// 等待文件状态恢复为0
printf("等待控制文件状态恢复为0...\n");
while (keep_running) {
int current_status = read_file_content_with_retry(control_file_path);
if (current_status == 0) {
printf("控制文件状态已恢复为0，继续监控\n");
break;
} else if (current_status == -1) {
printf("读取控制文件失败，等待%d秒后重试\n", poll_interval);
sleep(poll_interval);
} else {
printf("当前控制文件状态: %d，等待%d秒后检查\n", current_status, poll_interval);
sleep(poll_interval);
}
}
} else {
log_message("更新控制文件状态失败\n");
}
}
}
}