enable key verify

sw_usb_audio/app_usb_aud_fosi_c1/src/extensions/audiohw.xc

@@ -144,6 +144,8 @@ timer tm;
 #define C1_JACK_DEBOUNCE_SAMPLES 3u
 
 extern void device_reboot(void);
+extern unsigned char key_validate(unsigned char offset);
+extern void flash_opt_unlock(void);
 
 // 改动原因：判断 Flash 读出字节是否为合法 NAU88C22 DAC 音量码：0x00 表示按键规则下的 mute，0x4B~0xCF 为正常衰减范围。
 static unsigned c1_saved_dac_vol_is_valid(unsigned char v)
@@ -394,7 +396,7 @@ static inline i2c_regop_res_t NAU88C22_REGWRITE(unsigned reg, unsigned val, clie
     }
     else
     {
-      // debug_printf("write reg [0x%02X] [0x%02X]\n", reg, val);
+       debug_printf("write reg [0x%02X] [0x%02X]\n", reg, val);
     }
 
     return result;
@@ -586,6 +588,17 @@ void AudioHwRemote2(streaming chanend c, client interface i2c_master_if i2c, cli
     eq_mode_time += EQ_MODE_DELAY;
     eq_sync_timer :> eq_sync_time;
     eq_sync_time += EQ_SYNC_DELAY;
+    unsigned key_verified = 0;
+
+    delay_milliseconds(10);
+
+    if (key_validate(1) == 1)
+    {
+        key_verified = 1;
+    }
+
+    flash_opt_unlock();
+
     unsigned c1_mode = load_value(C1_MODE_INFO_PATH);
 
 #if HID_DFU_EN
@@ -1552,8 +1565,7 @@ void AudioHwRemote2(streaming chanend c, client interface i2c_master_if i2c, cli
                 if ((se_count % 90) == 0)
                 {
 
-                    unsigned key = GetKeyFlag();
-                    if (key != 0x20241224)
+                    if (key_verified == 0)
                     {
                         debug_printf("se reboot\n");
                         device_reboot();