oled initialization with ssd1306

oled-main with structure
ssd1306 initialization

test/oled/CMakeLists.txt

@@ -8,10 +8,11 @@ set(INCLUDE_DIRS
 )
 
 set(SRCS
-
+    ../../oled/oled.c
+    helpers/src/mock_i2c.c
 )
 
 add_definitions(-DTEST)
 add_executable(${TEST_NAME} ${SRCS})
 
-target_include_directories(${TEST_NAME} PUBLIC ${INCLUDE_DIR})
+target_include_directories(${TEST_NAME} PUBLIC ${INCLUDE_DIRS})

test/oled/helpers/inc/main.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct 
+{
+    uint8_t dummy;
+}I2C_HandleTypeDef;
+
+typedef enum 
+{
+  HAL_OK       = 0x00U,
+  HAL_ERROR    = 0x01U,
+  HAL_BUSY     = 0x02U,
+  HAL_TIMEOUT  = 0x03
+} HAL_StatusTypeDef;
+
+HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout);

test/oled/helpers/src/mock_i2c.c

@@ -0,0 +1,14 @@
+#include "main.h"
+
+
+HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
+{
+    (void)hi2c;
+    (void)DevAddress;
+    (void)MemAddress;
+    (void)MemAddSize;
+    (void)pData;
+    (void)Size;
+    (void)Timeout;
+    return HAL_OK;
+}