diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 6dc1654..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "lwip"]
-	path = lwip
-	url = git@github.com:lwip-tcpip/lwip.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8f6f367..ca743db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ project(stm32)
 
 add_subdirectory(bsp)   #application
 add_subdirectory(lib)   #stm32f4xx library
-add_subdirectory(lwip)  #lwip library
+# add_subdirectory(lwip)  #lwip library
 
 
 
diff --git a/README.md b/README.md
index e69de29..0f7e1d8 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,7 @@
+## Build
+### Manual Build
+    $cmake -S . -B build 
+    cmake --build build
+### Auto Build
+    $./bld 
+The executables located in the bin directory
diff --git a/bsp/CMakeLists.txt b/bsp/CMakeLists.txt
index 3b15075..dd69774 100644
--- a/bsp/CMakeLists.txt
+++ b/bsp/CMakeLists.txt
@@ -4,21 +4,30 @@ project(${target_base_name})
 
 set(elf_file ${target_base_name}.elf)
 
-set(CMAKE_PREFIX_PATH ${CMAKE_SOURCE_DIR}/lwip)
-
-find_package(LwIP REQUIRED)
+# set(LWIP_SOURCE_DIR ${CMAKE_SOURCE_DIR}/lwip)
+# file(GLOB_RECURSE LWIP_SOURCES ${LWIP_SOURCE_DIR}/*.c)
 
 add_executable(${elf_file}    
     ${CMAKE_SOURCE_DIR}/app/app.c 
     bsp.c
     main.c
     syscalls.c
+    # ${CMAKE_SOURCE_DIR}/lwip/src/core/init.c 
+    # ${LWIP_SOURCES}
+    # ${CMAKE_SOURCE_DIR}/lwip/src/core/netif.c 
+    # ${CMAKE_SOURCE_DIR}/lwip/src/core/udp.c 
+    # ${CMAKE_SOURCE_DIR}/lwip/src/core/mem.c 
+    # ${CMAKE_SOURCE_DIR}/lwip/src/core/sys.c 
 )
 
 target_include_directories(${elf_file} PRIVATE 
     ${CMAKE_SOURCE_DIR}/app
     ${CMAKE_SOURCE_DIR}/bsp
-    # ${CMAKE_SOURCE_DIR}/lwip/src/include/lwip 
+    ${CMAKE_SOURCE_DIR}/lwip
+    # ${CMAKE_SOURCE_DIR}/lwip/src/include
+    # ${CMAKE_SOURCE_DIR}/lwip/src/include/lwip
+    # ${CMAKE_SOURCE_DIR}/lwip/src/include/netif
+    # ${CMAKE_SOURCE_DIR}/lwip/system/
 )
 
 target_compile_options(${elf_file} PRIVATE -Wall -Wextra -Os)
diff --git a/bsp/bsp.c b/bsp/bsp.c
index 7536079..d2c6ca0 100644
--- a/bsp/bsp.c
+++ b/bsp/bsp.c
@@ -1,6 +1,6 @@
 #include <stdio.h> 
 #include "bsp.h"
- 
+
 static uint32_t EthStatus = 0;
 
 void SysTick_Handler(void)
@@ -94,37 +94,36 @@ void usart_init() {
 const uint8_t MAC_ADDR[6] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55};
 const uint8_t PHY_ADDR = 0x00;
 
+#define IP_ADDR0 192
+#define IP_ADDR1 168
+#define IP_ADDR2 0
+#define IP_ADDR3 5
+
+#define NETMASK_ADDR0 255
+#define NETMASK_ADDR1 255
+#define NETMASK_ADDR2 255
+#define NETMASK_ADDR3 0
+
+#define GW_ADDR0 192
+#define GW_ADDR1 168
+#define GW_ADDR2 0
+#define GW_ADDR3 1
+
+// static struct udp_pcb *echo_pcb;
+// static char echo_buffer[128];
+// static ip_addr_t ipaddr, netmask, gw;
+// static struct netif gnetif;
 void eth_init() {
-    ETH_InitTypeDef ETH_InitStructure;
+    // lwip_init();
     
-    ETH_DeInit();
-    ETH_SoftwareReset();
-    printf("Eth reseting...\r\n");
-    while (ETH_GetSoftwareResetStatus() == SET);
-    printf("Done\r\n");
 
-    ETH_MACAddressConfig(ETH_MAC_Address0, MAC_ADDR);
+    // IP4_ADDR(&ipaddr, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);
+    // IP4_ADDR(&netmask, NETMASK_ADDR0, NETMASK_ADDR1, NETMASK_ADDR2, NETMASK_ADDR3);
+    // IP4_ADDR(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
 
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_ETH_MAC | RCC_AHB1Periph_ETH_MAC_Tx | RCC_AHB1Periph_ETH_MAC_Rx, ENABLE);
-    ETH_StructInit(&ETH_InitStructure);
-    ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable;
-    ETH_InitStructure.ETH_Speed = ETH_Speed_100M;
-    ETH_InitStructure.ETH_Mode = ETH_Mode_FullDuplex;   
-    ETH_InitStructure.ETH_LoopbackMode = ETH_LoopbackMode_Disable;
-    ETH_InitStructure.ETH_RetryTransmission = ETH_RetryTransmission_Disable;
-    ETH_InitStructure.ETH_AutomaticPadCRCStrip = ETH_AutomaticPadCRCStrip_Disable;
-    ETH_InitStructure.ETH_ReceiveAll = ETH_ReceiveAll_Enable;
-
-    ETH_InitStructure.ETH_BroadcastFramesReception = ETH_BroadcastFramesReception_Enable;
-    ETH_InitStructure.ETH_PromiscuousMode = ETH_PromiscuousMode_Disable;
-    ETH_InitStructure.ETH_MulticastFramesFilter = ETH_MulticastFramesFilter_Perfect;
-    ETH_InitStructure.ETH_UnicastFramesFilter = ETH_UnicastFramesFilter_Perfect;
-
-    
-    EthStatus = ETH_Init(&ETH_InitStructure, PHY_ADDR);
-    printf("Eth init with status: %d\r\n", EthStatus);
-
-    ETH_Start();
+    // netif_set_ipaddr(&gnetif, &ipaddr);
+    // netif_set_netmask(&gnetif, &netmask);
+    // netif_set_gw(&gnetif, &gw);
 }
 
 void board_init() {
diff --git a/bsp/syscalls.c b/bsp/syscalls.c
index c098400..445969a 100644
--- a/bsp/syscalls.c
+++ b/bsp/syscalls.c
@@ -60,7 +60,7 @@ int _getpid(void)
 
 int _kill(int pid, int sig)
 {
-	errno = EINVAL;
+	// errno = EINVAL;
 	return -1;
 }
 
@@ -79,7 +79,7 @@ int _read (int file, char *ptr, int len)
 	  *ptr++ = __io_getchar();
 	}
 
-return len;
+	return len;
 }
 
 int _write(int file, char *ptr, int len)
@@ -108,7 +108,7 @@ caddr_t _sbrk(int incr)
 	{
 //		write(1, "Heap and stack collision\n", 25);
 //		abort();
-		errno = ENOMEM;
+		// errno = ENOMEM;
 		return (caddr_t) -1;
 	}
 
@@ -147,13 +147,13 @@ int _open(char *path, int flags, ...)
 
 int _wait(int *status)
 {
-	errno = ECHILD;
+	// errno = ECHILD;
 	return -1;
 }
 
 int _unlink(char *name)
 {
-	errno = ENOENT;
+	// errno = ENOENT;
 	return -1;
 }
 
@@ -170,18 +170,18 @@ int _stat(char *file, struct stat *st)
 
 int _link(char *old, char *new)
 {
-	errno = EMLINK;
+	// errno = EMLINK;
 	return -1;
 }
 
 int _fork(void)
 {
-	errno = EAGAIN;
+	// errno = EAGAIN;
 	return -1;
 }
 
 int _execve(char *name, char **argv, char **env)
 {
-	errno = ENOMEM;
+	// errno = ENOMEM;
 	return -1;
 }