diff --git a/arm_mps3_an547/liteos_m/board/main.c b/arm_mps3_an547/liteos_m/board/main.c
index 3cf2390cb2349ca4f211d422cc82d6da64f3b82c..98bc403e0a59c2aaad632b4b6693d007e76e6986 100755
--- a/arm_mps3_an547/liteos_m/board/main.c
+++ b/arm_mps3_an547/liteos_m/board/main.c
@@ -34,15 +34,36 @@
 unsigned int LosAppInit(VOID);
 unsigned int LosShellInit(void);
 
+// Enable EPU
+static void EPUInit(void)
+{
+#if ((__FPU_PRESENT == 1U) && (__FPU_USED == 1U))
+    __asm volatile
+    (
+        "    .equ CPACR, 0xE000ED88                 \n"
+        "                                           \n"
+        "    ldr  r0, =CPACR                        \n"
+        "    ldr  r1, [r0]                          \n"
+        "    orr  r1, r1, #(0xf << 20)              \n"
+        "    str  r1, [r0]                          \n"
+        "    dsb                                    \n"
+        "    isb                                    \n"
+        "                                           \n"
+        "    .align 4                               \n"
+    );
+#endif
+}
+
 LITE_OS_SEC_TEXT_INIT int main(void)
 {
     unsigned int ret;
 
+    EPUInit();
     UartInit();
 
     ret = LOS_KernelInit();
     if (ret != LOS_OK) {
-        printf("Liteos kernel init failed! ERROR: %d\n", ret);
+        printf("Liteos kernel init failed! ERROR: %u\n", ret);
         goto EXIT;
     }
 
@@ -51,13 +72,13 @@ LITE_OS_SEC_TEXT_INIT int main(void)
 #if (LOSCFG_USE_SHELL == 1)
     ret = LosShellInit();
     if (ret != LOS_OK) {
-        printf("LosAppInit failed! ERROR: %d\n", ret);
+        printf("LosAppInit failed! ERROR: %u\n", ret);
     }
 #endif
 
     ret = LosAppInit();
     if (ret != LOS_OK) {
-        printf("LosAppInit failed! ERROR: %d\n", ret);
+        printf("LosAppInit failed! ERROR: %u\n", ret);
     }
 
     LOS_Start();
diff --git a/arm_mps3_an547/liteos_m/board/startup.s b/arm_mps3_an547/liteos_m/board/startup.s
index d71866fbcc416aa03a2da478cee8b976931e82ca..ba5faee986a9da23b6051d3d4933697a32123ffb 100755
--- a/arm_mps3_an547/liteos_m/board/startup.s
+++ b/arm_mps3_an547/liteos_m/board/startup.s
@@ -33,8 +33,6 @@
   .fpu vfpv3-d16-fp16
   .thumb
 
-.equ CPACR, 0xE000ED88
-
 .extern HalExcNMI;
 .extern HalExcHardFault;
 .extern HalExcMemFault;
@@ -59,14 +57,6 @@ bss_loop:
     subs r3, r1, r0
     bne  bss_loop
 
-    // Enable EPU
-    ldr  r0, =CPACR
-    ldr  r1, [r0]
-    orr  r1, r1, #(0xf << 20)
-    str  r1, [r0]
-    dsb
-    isb
-
     ldr  sp, =__irq_stack_top
     b    main
 .size  Reset_Handler, .-Reset_Handler
diff --git a/arm_mps3_an547/liteos_m/config.gni b/arm_mps3_an547/liteos_m/config.gni
index cdc21923214235b1a85aa749453c8c38ed189b8c..f1ecc63fe629469032a803012cfe584234408cc0 100755
--- a/arm_mps3_an547/liteos_m/config.gni
+++ b/arm_mps3_an547/liteos_m/config.gni
@@ -52,6 +52,7 @@ board_cflags = [
   "-ffunction-sections",
   "-fno-builtin",
   "-fno-strict-aliasing",
+  "-mno-unaligned-access",
   "-fsigned-char",
   "-std=c99",
   "-Os",