diff --git a/raven_spn/raven_spn b/raven_spn/raven_spn
index f426bcb..cee7a80 100755
Binary files a/raven_spn/raven_spn and b/raven_spn/raven_spn differ
diff --git a/raven_spn/src/raven_spn.cpp b/raven_spn/src/raven_spn.cpp
index 178fb5b..b0266c1 100644
--- a/raven_spn/src/raven_spn.cpp
+++ b/raven_spn/src/raven_spn.cpp
@@ -94,9 +94,16 @@ void platform_init(){
 int main() {
     platform_init();
 
-    spn::start_reg()=1;
+    printf("Configure SPN HW accelerator\n");
+    spn::mode_reg() = 0;
+    spn::input_length_reg() = 1;
+    spn::input_addr_reg() = 0x80000000;
+    spn::output_addr_reg() = 0x80001000;
+    spn::num_of_in_beats_reg() = 1;
+    spn::num_of_out_beats_reg() = 1;
 
-    printf("set SPN Mode: 1\n");
+    printf("Start SPN HW accelerator\n");
+    spn::start_reg()=1;
 
     delayUS(100);
 
diff --git a/raven_spn/src/spn_regs.h b/raven_spn/src/spn_regs.h
index 9efb417..59b2e98 100644
--- a/raven_spn/src/spn_regs.h
+++ b/raven_spn/src/spn_regs.h
@@ -73,6 +73,30 @@ public:
     static inline start_t& start_reg(){
         return *reinterpret_cast<start_t*>(BASE_ADDR+SPN_REG_START);
     }
+
+    static inline uint32_t & mode_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_MODE);
+    }
+
+    static inline uint32_t & input_length_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_INPUT_LENGTH);
+    }
+
+    static inline uint32_t & input_addr_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_INPUT_ADDR);
+    }
+
+    static inline uint32_t & output_addr_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_OUTPUT_ADDR);
+    }
+
+    static inline uint32_t & num_of_in_beats_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_NUM_OF_INPUT_BEATS);
+    }
+
+    static inline uint32_t & num_of_out_beats_reg(){
+        return *reinterpret_cast<uint32_t*>(BASE_ADDR+SPN_REG_NUM_OF_OUTPUT_BEATS);
+    }
 };
 
 #endif // _SPN_REGS_H_