diff --git a/arch/risc-v/bumblebee/gcc/riscv_port_c.c b/arch/risc-v/bumblebee/gcc/riscv_port_c.c
index 27d711f8..7e063ac2 100644
--- a/arch/risc-v/bumblebee/gcc/riscv_port_c.c
+++ b/arch/risc-v/bumblebee/gcc/riscv_port_c.c
@@ -1,5 +1,101 @@
-#include "gd32vf103.h"
+#include "tos.h"
+
+#define ECLIC_ADDR_BASE         0xD2000000
+#define CLIC_INT_TMR            0x07
+
+#define ECLIC_CFG_OFFSET        0x00
+#define ECLIC_INFO_OFFSET       0x04
+#define ECLIC_MTH_OFFSET        0x0B
+
+
+#define ECLIC_INT_IP_OFFSET     0x1000
+#define ECLIC_INT_IE_OFFSET     0x1001
+#define ECLIC_INT_ATTR_OFFSET   0x1002
+#define ECLIC_INT_CTRL_OFFSET   0x1003
+
+
+#define ECLIC_CFG_NLBITS_MASK   0x1E
+#define ECLIC_CFG_NLBITS_LSB    1
+
+
+static uint8_t elci_get_clic_int_ctl_bits() {
+    uint32_t bits = *(volatile uint32_t*)(ECLIC_ADDR_BASE+ECLIC_INFO_OFFSET);
+    bits >>= 21;
+    return (uint8_t) bits;
+}
+
+
+static uint8_t elci_get_nlbits() {
+    uint8_t nlbits = *(volatile uint8_t*)(ECLIC_ADDR_BASE+ECLIC_CFG_OFFSET);
+    nlbits = (nlbits & ECLIC_CFG_NLBITS_MASK) >> ECLIC_CFG_NLBITS_LSB;
+
+    uint8_t cicbits = elci_get_clic_int_ctl_bits();
+    if(nlbits > cicbits) {
+        nlbits = cicbits;
+    }
+
+    return nlbits;
+}
+
+static uint8_t eclic_get_intctrl(uint32_t source) {
+    return *(volatile uint8_t*)(ECLIC_ADDR_BASE+ECLIC_INT_CTRL_OFFSET+source*4);
+}
+
+static void    eclic_set_intctrl(uint32_t source, uint8_t v) {
+    *(volatile uint8_t*)(ECLIC_ADDR_BASE+ECLIC_INT_CTRL_OFFSET+source*4) = v;
+}
+
+
+static void eclic_enable_interrupt(uint32_t source) {
+    *(volatile uint8_t*)(ECLIC_ADDR_BASE+ECLIC_INT_IE_OFFSET+source*4) = 1;
+}
+
+static void eclic_set_irq_level(uint32_t source, uint8_t level) {
+    uint8_t nlbits = elci_get_nlbits();
+
+    if (nlbits == 0) {
+        return ;
+    }
+
+    uint8_t intctrl_val = eclic_get_intctrl(CLIC_INT_TMR);
+
+    intctrl_val <<= nlbits;
+    intctrl_val >>= nlbits;
+    intctrl_val  |= (level << (8- nlbits));
+
+    eclic_set_intctrl(CLIC_INT_TMR, intctrl_val);
+}
+
+static void eclic_set_irq_priority(uint32_t source, uint8_t priority) {
+    uint8_t nlbits = elci_get_nlbits();
+    uint8_t cicbits= elci_get_clic_int_ctl_bits();
+
+    if (nlbits >= cicbits) {
+        return ;
+    }
+
+
+    uint8_t pad   = ~0;
+    pad         >>= (8 - cicbits);
+    pad         <<= (8 - cicbits);
+
+
+    uint8_t intctrl_val = eclic_get_intctrl(CLIC_INT_TMR);
+
+    intctrl_val >>= (8 - nlbits);
+    intctrl_val <<= (8 - nlbits);
+    intctrl_val  |= (priority << (8 - cicbits));
+    intctrl_val  |= pad;
+
+    eclic_set_intctrl(CLIC_INT_TMR, intctrl_val);
+}
 
 void riscv_cpu_init() {
-    eclic_irq_enable(CLIC_INT_TMR, 0, 0);
+
+    eclic_enable_interrupt(CLIC_INT_TMR);
+
+    eclic_set_irq_level(CLIC_INT_TMR, 0);
+
+    eclic_set_irq_priority(CLIC_INT_TMR, 0);
+
 }
diff --git a/arch/risc-v/rv32i/gcc/port_c.c b/arch/risc-v/rv32i/gcc/port_c.c
index 0a2aa0e8..fc848646 100644
--- a/arch/risc-v/rv32i/gcc/port_c.c
+++ b/arch/risc-v/rv32i/gcc/port_c.c
@@ -2,8 +2,6 @@
 #include "riscv_port.h"
 #include <tos.h>
 
-//#include "gd32vf103.h"
-
 __PORT__ void port_systick_config(uint32_t cycle_per_tick)
 {
 
@@ -37,5 +35,5 @@ __PORT__ void port_systick_config(uint32_t cycle_per_tick)
 
 __PORT__ void port_systick_priority_set(uint32_t prio)
 {
-    //NVIC_SetPriority(SysTick_IRQn, prio);
+
 }
diff --git a/board/GD32VF103C_START/eclipse/hello_world/.cproject b/board/GD32VF103C_START/eclipse/hello_world/.cproject
index 0da076c8..f8d3eea4 100644
--- a/board/GD32VF103C_START/eclipse/hello_world/.cproject
+++ b/board/GD32VF103C_START/eclipse/hello_world/.cproject
@@ -142,6 +142,8 @@
                                     <listOptionValue builtIn="false" value="&quot;${workspace_loc:/hello_world/TencentOS_tiny/arch/risc-v/rv32i}&quot;"/>
                                     									
                                     <listOptionValue builtIn="false" value="&quot;${workspace_loc:/hello_world/TencentOS_tiny/arch/risc-v/bumblebee}&quot;"/>
+                                    									
+                                    <listOptionValue builtIn="false" value="&quot;${workspace_loc:/hello_world/TencentOS_tiny/kernel/evtdrv/include}&quot;"/>
                                     								
                                 </option>
                                 								
diff --git a/board/GD32VF103C_START/eclipse/hello_world/.settings/language.settings.xml b/board/GD32VF103C_START/eclipse/hello_world/.settings/language.settings.xml
index 23927be1..140cae41 100644
--- a/board/GD32VF103C_START/eclipse/hello_world/.settings/language.settings.xml
+++ b/board/GD32VF103C_START/eclipse/hello_world/.settings/language.settings.xml
@@ -11,7 +11,7 @@
             			
             <provider-reference id="org.eclipse.cdt.managedbuilder.core.MBSLanguageSettingsProvider" ref="shared-provider"/>
             			
-            <provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="1372898985477160516" id="ilg.gnumcueclipse.managedbuild.cross.riscv.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT RISC-V Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
+            <provider class="org.eclipse.cdt.managedbuilder.language.settings.providers.GCCBuiltinSpecsDetector" console="false" env-hash="1367083006174630109" id="ilg.gnumcueclipse.managedbuild.cross.riscv.GCCBuiltinSpecsDetector" keep-relative-paths="false" name="CDT RISC-V Cross GCC Built-in Compiler Settings" parameter="${COMMAND} ${FLAGS} ${cross_toolchain_flags} -E -P -v -dD &quot;${INPUTS}&quot;" prefer-non-shared="true">
                 				
                 <language-scope id="org.eclipse.cdt.core.gcc"/>