diff --git a/bare-metal-bsp b/bare-metal-bsp
index fc3f6c5..d8728e3 160000
--- a/bare-metal-bsp
+++ b/bare-metal-bsp
@@ -1 +1 @@
-Subproject commit fc3f6c57e5cfef59da2b74c78da350857b449cbf
+Subproject commit d8728e319c31cedda9e2d901ebcdf37afb6488cb
diff --git a/test_fw/test_fw.c b/test_fw/test_fw.c
index da3cfd9..1530792 100644
--- a/test_fw/test_fw.c
+++ b/test_fw/test_fw.c
@@ -6,11 +6,15 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-extern void _init();
+void handle_m_time_interrupt() {
+    uint64_t time = get_aclint_mtime(aclint);
+    time += MTIMER_NEXT_TICK_INC;
+    set_aclint_mtimecmp(aclint, time);
+    puts("m_time_irq");
+}
+
 int main() {
-    // board_init();
-    _init();
-    puts("after _init");
+    puts("in main");
     // avoid getting interrupt upon enabling MIP/MIE_MTI
     set_aclint_mtimecmp(aclint, 0xffffffffffffffff);
     // enable global interrupt
@@ -22,16 +26,16 @@ int main() {
     puts("after enable MIE");
 
     uint64_t time = get_aclint_mtime(aclint);
-    printf("in main() get_aclint_mtime return %lu \n ", (uint32_t)time);
+    printf("in main() get_aclint_mtime return %lu \n", (uint32_t)time);
     set_aclint_mtime(aclint, 9);
     time = get_aclint_mtime(aclint);
-    printf("in main() get_aclint_mtime  after set 9, return %lu \n ", (uint32_t)time);
+    printf("in main() get_aclint_mtime  after set 9, return %lu \n", (uint32_t)time);
 
-    set_aclint_mtimecmp(aclint, (time + 300));
+    set_aclint_mtimecmp(aclint, (time + 3));
     puts("set mtimecmp");
 
     uint64_t timecmp = get_aclint_mtimecmp(aclint);
-    printf("in  main() get_aclint_mtimecmp return %d \n ", timecmp);
+    printf("in  main() get_aclint_mtimecmp return %d \n", timecmp);
 
     puts(" finshed ");
     return 0;