test: add watchdog stall task

ql-application/threadx/interface/custom_app/custom_app.c

@@ -30,6 +30,8 @@
 #include "hal_api.h"
 #include "nfc.h"
 
+#define WATCHDOG_STALL_TEST_ENABLE
+
 
 #define APP_ENABLE_SLEEP
 
@@ -39,6 +41,21 @@ static unsigned char app_operation = 0;
 extern int fota_start;
 int fisrt_net_start = 1;
 
+#ifdef WATCHDOG_STALL_TEST_ENABLE
+static volatile unsigned char g_watchdog_stall_test;
+
+static void watchdog_stall_test_task(void *argv)
+{
+	(void)argv;
+	ql_rtos_task_sleep_s(30);
+	printf("WATCHDOG TEST: stop feeding and enter dead loop\r\n");
+	g_watchdog_stall_test = 1;
+	while (1) {
+		/* Deliberately block this task until the hardware watchdog resets us. */
+	}
+}
+#endif
+
 // 安全修复：添加互斥锁保护全局共享变量
 static ql_mutex_t g_app_op_mutex = NULL;
 #define APP_OP_LOCK()   do{ if(g_app_op_mutex) ql_rtos_mutex_lock(g_app_op_mutex, QL_WAIT_FOREVER); }while(0)
@@ -245,6 +262,11 @@ jump_not_sleep:
 		battery_check();
 	//	printf("custom_app_task running\n");
 		ql_rtos_task_sleep_s(5);
+	#ifdef WATCHDOG_STALL_TEST_ENABLE
+		if (g_watchdog_stall_test) {
+			continue;
+		}
+	#endif
 		ql_wtd_feed();
 	}
 }
@@ -252,4 +274,8 @@ jump_not_sleep:
 
 application_init(custom_app_task, "custom_app", 10, 0);
 
+#ifdef WATCHDOG_STALL_TEST_ENABLE
+application_init(watchdog_stall_test_task, "wdt_stall_test", 2, 1);
+#endif
+