diff --git a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_neu.h b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_neu.h
index bf56883d3..86c3818c2 100644
--- a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_neu.h
+++ b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_neu.h
@@ -304,29 +304,6 @@ static uint8_t headstage_debug_instruction(uint8_t* ins_buf) {
     return 0;
 }
 
-/**
- *  @fn build amplifier bias
- */
-
-static bool build_amp_bias(uint32_t* value) {
-    uint8_t ins_opcode = INSTRUCTION.ins_opcode;
-    switch (ins_opcode) {
-        case BIAS_ONE: {
-            *value                 = (0x01 << 23) | (0x39 << 16) | NEU_LNA_BIAS_ONE;
-            INSTRUCTION.ins_opcode = BIAS_TWO;
-            return false;
-        }
-        case BIAS_TWO: {
-            *value                 = (0x01 << 23) | (0x3A << 16) | NEU_LNA_BIAS_TWO;
-            INSTRUCTION.ins_opcode = BIAS_TWO;
-            return true;
-        }
-        default: {
-            return false;
-        }
-    }
-}
-
 /**
  *  @fn headstage_init
  *
@@ -1017,7 +994,7 @@ static void headstage_neu_state_spi() {
             SPICallBack = ONE_SHOT_SPI;
             INSTRUCTION.ins_opcode    = T_ZE;
 
-            nxt_ins                   = build_ins_ins(NEULIVE_STATE.config_type, &value); /**< set instruction one by one in order to set all the parameter.*/
+            nxt_ins                   = build_sti_ins(NEULIVE_STATE.config_type, &value); /**< set instruction one by one in order to set all the parameter.*/
             NEULIVE_STATE.config_type = nxt_ins;
 
             if (nxt_ins == NEU_SETUP_DONE) {
@@ -1135,7 +1112,7 @@ static void headstage_neu_state_spi() {
 
 
         // terminate stimulation
-        case NEU_STI_INT {
+        case NEU_STI_INT: {
             NEULIVE_STATE.state = NEU_STI_INT_TWICE;
             SPICallBack = ONE_SHOT_SPI;
 
@@ -1145,7 +1122,7 @@ static void headstage_neu_state_spi() {
             break;
         }
 
-        case NEU_STI_INT_TWICE {
+        case NEU_STI_INT_TWICE: {
             NEULIVE_STATE.state = NEU_CHECK_STI_INT;
             SPICallBack = ONE_SHOT_SPI;
 
@@ -1155,7 +1132,7 @@ static void headstage_neu_state_spi() {
             break;
         }
 
-        case NEU_CHECK_STI_INT {
+        case NEU_CHECK_STI_INT: {
             rec_sti_command &= ~STATUS_STI;
             if(rec_sti_command & STATUS_REC){
                 check_register(STI_CHANNEL_REG, 0, NEU_PREPARE_READ);
diff --git a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_rec_ins.h b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_rec_ins.h
index cd298cfa3..bd68ae380 100644
--- a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_rec_ins.h
+++ b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_rec_ins.h
@@ -4,6 +4,29 @@
 
 #include "headstage_instruction.h"
 
+/**
+ *  @fn build amplifier bias
+ */
+
+static bool build_amp_bias(uint32_t* value) {
+    uint8_t ins_opcode = INSTRUCTION.ins_opcode;
+    switch (ins_opcode) {
+        case BIAS_ONE: {
+            *value                 = (0x01 << 23) | (0x39 << 16) | NEU_LNA_BIAS_ONE;
+            INSTRUCTION.ins_opcode = BIAS_TWO;
+            return false;
+        }
+        case BIAS_TWO: {
+            *value                 = (0x01 << 23) | (0x3A << 16) | NEU_LNA_BIAS_TWO;
+            INSTRUCTION.ins_opcode = BIAS_TWO;
+            return true;
+        }
+        default: {
+            return false;
+        }
+    }
+}
+
 static uint8_t build_rec_ins(uint8_t config_type, uint32_t* value) {
     bool single_ch_config_done;
     bool done;
diff --git a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_sti_ins.h b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_sti_ins.h
index a1fb2a0f9..0400f13dc 100644
--- a/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_sti_ins.h
+++ b/simplelink/ble_sdk_2_02_02_25/src/examples/simple_peripheral/cc26xx/app/headstage/headstage_sti_ins.h
@@ -198,6 +198,10 @@ static uint8_t build_sti_ins(uint8_t config_type, uint32_t* value){
             *value = (0x01 << 23) | (0x38 << 16) | (INSTRUCTION.sti_mode << 2) | (INSTRUCTION.sti_h_bridge << 1) | (INSTRUCTION.sti_ref);
             return NEU_SETUP_DONE;
         }
+
+        default: {
+            return NEU_WARM_UP;
+        }
     }
 }
 #endif