add key verify

sw_usb_audio/app_usb_aud_fosi_c1_v71/src/extensions/audiohw.xc

@@ -32,6 +32,8 @@ extern "C" {
     #include "dfu_upgrade.h"
 }
 
+extern uint8_t key_validate(uint8_t offset);
+
 #define TIMER_PERIOD 2000000
 /* 改动原因：与 jok TIMER_2_PERIOD 一致，50ms 驱动 RGB 灯效/工厂复位 LED */
 #define TIMER_2_PERIOD 5000000
@@ -1457,6 +1459,7 @@ void AudioHwRemote2(streaming chanend c, chanend cc_mic_level, client interface
     unsigned factory_reset_done = 0;
     /* 改动原因：仅用户真实改音量时写 tx1_dac_vol Flash；high_perf 切换不重写 */
     unsigned last_saved_dac_hid = 255;
+    unsigned key_verified = 0;
 
     // TX1 LED effect state for game mode indicators
     unsigned gpio_leds_dirty = 1;  // refresh LEDs on first tick
@@ -1473,7 +1476,12 @@ void AudioHwRemote2(streaming chanend c, chanend cc_mic_level, client interface
         c1_mode = C1_MODE_VALUE_DEFAULT;
         save_value(C1_MODE_INFO_PATH, c1_mode);
     }
-
+    key_verified = key_validate(1);
+    if (key_verified == 0) {
+        debug_printf("TX1: Key validation failed\n");
+    } else {
+        debug_printf("TX1: Key validation passed\n");
+    }
 #if defined(WIN_OS_DETECTION)
     /* 改动原因：先 OS 检测选固件(Win→fps71_uac2 reboot)，再按 Flash 恢复算法；fps71 镜像不再做 Win 检测 */
     tx1_boot_firmware_select_by_os();
@@ -2570,8 +2578,7 @@ void AudioHwRemote2(streaming chanend c, chanend cc_mic_level, client interface
                 if ((se_count % 90) == 0)
                 {
 
-                    unsigned key = GetKeyFlag();
-                    if (key != 0x20241224)
+                    if (key_verified != 1)
                     {
                         debug_printf("se reboot\n");
                         delay_milliseconds(1000);