diff --git a/Core/Inc/main.h b/Core/Inc/main.h
index 9f6c7db..beb171b 100644
--- a/Core/Inc/main.h
+++ b/Core/Inc/main.h
@@ -97,8 +97,8 @@ void Error_Handler(void);
 #define STATUS3_GPIO_Port GPIOB
 #define STATUS4_Pin GPIO_PIN_7
 #define STATUS4_GPIO_Port GPIOB
-#define AMS_ERROR_Pin GPIO_PIN_8
-#define AMS_ERROR_GPIO_Port GPIOB
+#define AMS_NERROR_Pin GPIO_PIN_8
+#define AMS_NERROR_GPIO_Port GPIOB
 
 /* USER CODE BEGIN Private defines */
 
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 90dcfb0..521d565 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -110,6 +110,7 @@ int main(void) {
   shunt_init();
   ts_sm_init();
   soc_init();
+  HAL_GPIO_WritePin(AMS_NERROR_GPIO_Port, AMS_NERROR_Pin, GPIO_PIN_SET);
   /* USER CODE END 2 */
 
   /* Infinite loop */
@@ -315,7 +316,8 @@ static void MX_GPIO_Init(void) {
                     SLAVE_POWER_1_Pin | SLAVE_POWER_DSEL_Pin |
                         SLAVE_POWER_DEN_Pin | SLAVE_POWER_0_Pin |
                         POS_AIR_CTRL_Pin | NEG_AIR_CTRL_Pin | STATUS1_Pin |
-                        STATUS2_Pin | STATUS3_Pin | STATUS4_Pin | AMS_ERROR_Pin,
+                        STATUS2_Pin | STATUS3_Pin | STATUS4_Pin |
+                        AMS_NERROR_Pin,
                     GPIO_PIN_RESET);
 
   /*Configure GPIO pin Output Level */
@@ -340,11 +342,11 @@ static void MX_GPIO_Init(void) {
 
   /*Configure GPIO pins : SLAVE_POWER_1_Pin SLAVE_POWER_DSEL_Pin
      SLAVE_POWER_DEN_Pin SLAVE_POWER_0_Pin POS_AIR_CTRL_Pin NEG_AIR_CTRL_Pin
-     STATUS1_Pin STATUS2_Pin STATUS3_Pin STATUS4_Pin AMS_ERROR_Pin */
-  GPIO_InitStruct.Pin = SLAVE_POWER_1_Pin | SLAVE_POWER_DSEL_Pin |
-                        SLAVE_POWER_DEN_Pin | SLAVE_POWER_0_Pin |
-                        POS_AIR_CTRL_Pin | NEG_AIR_CTRL_Pin | STATUS1_Pin |
-                        STATUS2_Pin | STATUS3_Pin | STATUS4_Pin | AMS_ERROR_Pin;
+     STATUS1_Pin STATUS2_Pin STATUS3_Pin STATUS4_Pin AMS_NERROR_Pin */
+  GPIO_InitStruct.Pin =
+      SLAVE_POWER_1_Pin | SLAVE_POWER_DSEL_Pin | SLAVE_POWER_DEN_Pin |
+      SLAVE_POWER_0_Pin | POS_AIR_CTRL_Pin | NEG_AIR_CTRL_Pin | STATUS1_Pin |
+      STATUS2_Pin | STATUS3_Pin | STATUS4_Pin | AMS_NERROR_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
   GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
diff --git a/Makefile b/Makefile
index ecf1f2c..a3b15bc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 ##########################################################################################################################
-# File automatically-generated by tool: [projectgenerator] version: [3.19.2] date: [Sun Mar 12 19:36:18 CET 2023] 
+# File automatically-generated by tool: [projectgenerator] version: [3.19.2] date: [Sun Apr 02 01:03:50 CEST 2023] 
 ##########################################################################################################################
 
 # ------------------------------------------------
diff --git a/STM32Make.make b/STM32Make.make
index b398e59..908631a 100644
--- a/STM32Make.make
+++ b/STM32Make.make
@@ -199,8 +199,14 @@ vpath %.cpp $(sort $(dir $(CPP_SOURCES)))
 # list of C objects
 OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
 vpath %.c $(sort $(dir $(C_SOURCES)))
+
 # list of ASM program objects
-OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
+# list of ASM program objects
+UPPER_CASE_ASM_SOURCES = $(filter %.S,$(ASM_SOURCES))
+LOWER_CASE_ASM_SOURCES = $(filter %.s,$(ASM_SOURCES))
+
+OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(UPPER_CASE_ASM_SOURCES:.S=.o)))
+OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(LOWER_CASE_ASM_SOURCES:.s=.o)))
 vpath %.s $(sort $(dir $(ASM_SOURCES)))
 
 $(BUILD_DIR)/%.o: %.cpp STM32Make.make | $(BUILD_DIR) 
@@ -215,6 +221,9 @@ $(BUILD_DIR)/%.o: %.c STM32Make.make | $(BUILD_DIR)
 $(BUILD_DIR)/%.o: %.s STM32Make.make | $(BUILD_DIR)
 	$(AS) -c $(CFLAGS) $< -o $@
 
+$(BUILD_DIR)/%.o: %.S STM32Make.make | $(BUILD_DIR)
+	$(AS) -c $(CFLAGS) $< -o $@
+
 $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) STM32Make.make
 	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
 	$(SZ) $@
diff --git a/ams-master-23.ioc b/ams-master-23.ioc
index 25faf02..799e80b 100644
--- a/ams-master-23.ioc
+++ b/ams-master-23.ioc
@@ -185,7 +185,7 @@ PB7.GPIO_Label=STATUS4
 PB7.Locked=true
 PB7.Signal=GPIO_Output
 PB8.GPIOParameters=GPIO_Label
-PB8.GPIO_Label=AMS_ERROR
+PB8.GPIO_Label=AMS_NERROR
 PB8.Locked=true
 PB8.Signal=GPIO_Output
 PF0-OSC_IN.Mode=HSE-External-Oscillator