diff --git a/cube/User/Inc/signal.h b/cube/User/Inc/signal.h
new file mode 100644
index 0000000..66cd0bc
--- /dev/null
+++ b/cube/User/Inc/signal.h
@@ -0,0 +1,13 @@
+#ifndef _DEBUG_H_
+#define _DEBUG_H_
+
+
+#include <stdint.h>
+
+typedef enum { DEBUG_1, DEBUG_2, LED_RED, LED_GREEN } signalPin_t;
+typedef enum { ON, OFF, TOGGLE } signalAction_t;
+
+void signal(signalPin_t signalPin, signalAction_t action);
+
+
+#endif // _DEBUG_H_
diff --git a/cube/User/Src/signal.c b/cube/User/Src/signal.c
new file mode 100644
index 0000000..ef75e8d
--- /dev/null
+++ b/cube/User/Src/signal.c
@@ -0,0 +1,49 @@
+#include <main.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stm32f103xe.h>
+
+
+void signal(signalPin_t signalPin, signalAction_t action) {
+    GPIO_TypeDef *port = NULL;
+    uint16_t pin = 0;
+
+    switch (signalPin) {
+        case DEBUG_1:
+        port = Debug_Signal_1_GPIO_Port;
+        pin = Debug_Signal_1_Pin;
+        break;
+
+        case DEBUG_2:
+        port = Debug_Signal_2_GPIO_Port;
+        pin = Debug_Signal_2_Pin;
+        break;
+
+        case LED_RED:
+        port = LED_Red_GPIO_Port;
+        pin = LED_Red_Pin;
+        break;
+
+        case LED_GREEN:
+        port = LED_Green_GPIO_Port;
+        pin = LED_Green_Pin;
+        break;
+    }
+
+    if (port != NULL) {
+        switch (action) {
+            case ON:
+            HAL_GPIO_WritePin(port, pin, GPIO_PIN_SET);
+            break;
+
+            case OFF:
+            HAL_GPIO_WritePin(port, pin, GPIO_PIN_RESET);
+            break;
+
+            case TOGGLE:
+            HAL_GPIO_TogglePin(port, pin);
+            break;
+        }
+    }
+}