diff --git a/Ubiquitous/XiZi_IIoT/arch/risc-v/shared/boot.h b/Ubiquitous/XiZi_IIoT/arch/risc-v/shared/boot.h
index e6c6505a5..4d3d1226f 100644
--- a/Ubiquitous/XiZi_IIoT/arch/risc-v/shared/boot.h
+++ b/Ubiquitous/XiZi_IIoT/arch/risc-v/shared/boot.h
@@ -47,37 +47,102 @@
 .endm
 
 .macro ZERO_F_REGISTERS
+  fssr x31
+
+  fmv.d.x f0, x31
   FSubDS f0, f0, f0
+
+  fmv.d.x f1, x31
   FSubDS f1, f1, f1
+
+  fmv.d.x f2, x31
   FSubDS f2, f2, f2
+
+  fmv.d.x f3, x31
   FSubDS f3, f3, f3
+
+  fmv.d.x f4, x31
   FSubDS f4, f4, f4
+
+  fmv.d.x f5, x31
   FSubDS f5, f5, f5
+
+  fmv.d.x f6, x31
   FSubDS f6, f6, f6
+
+  fmv.d.x f7, x31
   FSubDS f7, f7, f7
+
+  fmv.d.x f8, x31
   FSubDS f8, f8, f8
+
+  fmv.d.x f9, x31
   FSubDS f9, f9, f9
+
+  fmv.d.x f10, x31
   FSubDS f10,f10,f10
+
+  fmv.d.x f11, x31
   FSubDS f11,f11,f11
+
+  fmv.d.x f12, x31
   FSubDS f12,f12,f12
+
+  fmv.d.x f13, x31
   FSubDS f13,f13,f13
+
+  fmv.d.x f14, x31
   FSubDS f14,f14,f14
+
+  fmv.d.x f15, x31
   FSubDS f15,f15,f15
+
+  fmv.d.x f16, x31
   FSubDS f16,f16,f16
+
+  fmv.d.x f17, x31
   FSubDS f17,f17,f17
+
+  fmv.d.x f18, x31
   FSubDS f18,f18,f18
+
+  fmv.d.x f19, x31
   FSubDS f19,f19,f19
+
+  fmv.d.x f20, x31
   FSubDS f20,f20,f20
+
+  fmv.d.x f21, x31
   FSubDS f21,f21,f21
+
+  fmv.d.x f22, x31
   FSubDS f22,f22,f22
+
+  fmv.d.x f23, x31
   FSubDS f23,f23,f23
+
+  fmv.d.x f24, x31
   FSubDS f24,f24,f24
+
+  fmv.d.x f25, x31
   FSubDS f25,f25,f25
+
+  fmv.d.x f26, x31
   FSubDS f26,f26,f26
+
+  fmv.d.x f27, x31
   FSubDS f27,f27,f27
+
+  fmv.d.x f28, x31
   FSubDS f28,f28,f28
+
+  fmv.d.x f29, x31
   FSubDS f29,f29,f29
+
+  fmv.d.x f30, x31
   FSubDS f30,f30,f30
+
+  fmv.d.x f31, x31
   FSubDS f31,f31,f31
 .endm
 
diff --git a/Ubiquitous/XiZi_IIoT/board/kd233/config.mk b/Ubiquitous/XiZi_IIoT/board/kd233/config.mk
index 6a106fa32..ac381a53d 100644
--- a/Ubiquitous/XiZi_IIoT/board/kd233/config.mk
+++ b/Ubiquitous/XiZi_IIoT/board/kd233/config.mk
@@ -1,4 +1,4 @@
-export CFLAGS := -mcmodel=medany -march=rv64imafdc -mabi=lp64d -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -O0 -ggdb -fgnu89-inline -Werror 
+export CFLAGS := -mcmodel=medany -march=rv64imafdc -mabi=lp64d -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -O0 -ggdb -fgnu89-inline  
 # $(warning, "DEBUG, here add cflags.")
 # export CFLAGS += -nostdlib -nostdinc -fno-builtin
 export AFLAGS := -c -mcmodel=medany -march=rv64imafdc -mabi=lp64d -x assembler-with-cpp -ggdb
@@ -16,7 +16,7 @@ ifeq ($(CONFIG_RESOURCES_LWIP), y)
 export LINK_LWIP := $(KERNEL_ROOT)/resources/ethernet/LwIP/liblwip.a
 endif
 
-export CXXFLAGS := -mcmodel=medany -march=rv64imafdc -mabi=lp64d -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -O0 -ggdb -Werror
+export CXXFLAGS := -mcmodel=medany -march=rv64imafdc -mabi=lp64d -fno-common -ffunction-sections -fdata-sections -fstrict-volatile-bitfields -O0 -ggdb 
 
 export CROSS_COMPILE ?=/opt/gnu-mcu-eclipse/riscv-none-gcc/8.2.0-2.1-20190425-1021/bin/riscv-none-embed-