diff --git a/.gitmodules b/.gitmodules
index 17f8003..d0d6642 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "lwip/lwip"]
 	path = lwip/lwip
-	url = https://github.com/ourairquality/lwip.git
+	url = https://github.com/ccbruce0812/lwip.git
 [submodule "extras/mbedtls/mbedtls"]
 	path = extras/mbedtls/mbedtls
 	url = https://github.com/ARMmbed/mbedtls.git
@@ -28,3 +28,15 @@
 [submodule "extras/crc_generic/crc_lib"]
 	path = extras/crc_generic/crc_lib
 	url = https://github.com/Zaltora/crc_generic_lib.git
+[submodule "extras/kt0803l"]
+	path = extras/kt0803l
+	url = https://github.com/ccbruce0812/kt0803l.git
+[submodule "extras/rda5807m"]
+	path = extras/rda5807m
+	url = https://github.com/ccbruce0812/rda5807m.git
+[submodule "examples/rda5807m_test"]
+	path = examples/rda5807m_test
+	url = https://github.com/ccbruce0812/rda5807m_test.git
+[submodule "extras/mcpwm"]
+	path = extras/mcpwm
+	url = https://github.com/ccbruce0812/mcpwm.git
diff --git a/examples/rda5807m_test b/examples/rda5807m_test
new file mode 160000
index 0000000..439b9fa
--- /dev/null
+++ b/examples/rda5807m_test
@@ -0,0 +1 @@
+Subproject commit 439b9fa3dfd8ea29cfef60184889ea461f56a7d7
diff --git a/extras/dhcpserver/dhcpserver.c b/extras/dhcpserver/dhcpserver.c
old mode 100644
new mode 100755
index 934beb2..e0debff
--- a/extras/dhcpserver/dhcpserver.c
+++ b/extras/dhcpserver/dhcpserver.c
@@ -106,6 +106,29 @@ void dhcpserver_start(const ip4_addr_t *first_client_addr, uint8_t max_leases)
     xTaskCreate(dhcpserver_task, "DHCP Server", 448, NULL, 2, &dhcpserver_task_handle);
 }
 
+uint32_t dhcpserver_get_leases(dhcpserver_lease_t *leases, uint32_t capacity) {
+	uint32_t i=0, count=0;
+	
+	taskENTER_CRITICAL();
+
+	for(i=0;i<state->max_leases;i++) {
+		if(count>=capacity) {
+			count=capacity;
+			break;
+		}
+		
+		if(state->leases[i].active) {
+			memcpy(&leases[count].hwaddr, &state->leases[i].hwaddr, sizeof(uint8_t)*6);
+			ip4_addr_copy(leases[count].ipaddr, state->first_client_addr);
+			leases[count].ipaddr.addr+=count;
+			count++;
+		}
+	}
+
+	taskEXIT_CRITICAL();
+	return count;
+}
+
 void dhcpserver_stop(void)
 {
     if (dhcpserver_task_handle) {
@@ -150,6 +173,8 @@ static void dhcpserver_task(void *pxParameter)
             printf("DHCP Server Error: Failed to receive DHCP packet. err=%d\r\n", err);
             continue;
         }
+		
+		taskENTER_CRITICAL();
 
         /* expire any leases that have passed */
         uint32_t now = xTaskGetTickCount();
@@ -169,6 +194,7 @@ static void dhcpserver_task(void *pxParameter)
         if (netbuf_len(netbuf) < offsetof(struct dhcp_msg, options)) {
             /* too short to be a valid DHCP client message */
             netbuf_delete(netbuf);
+			taskEXIT_CRITICAL();
             continue;
         }
         if (netbuf_len(netbuf) >= sizeof(struct dhcp_msg)) {
@@ -182,6 +208,7 @@ static void dhcpserver_task(void *pxParameter)
                                                  DHCP_OPTION_MESSAGE_TYPE_LEN, NULL);
         if (!message_type) {
             printf("DHCP Server Error: No message type field found");
+			taskEXIT_CRITICAL();
             continue;
         }
 
@@ -207,6 +234,8 @@ static void dhcpserver_task(void *pxParameter)
             printf("DHCP Server Error: Unsupported message type %d\r\n", *message_type);
             break;
         }
+		
+		taskEXIT_CRITICAL();
     }
 }
 
diff --git a/extras/dhcpserver/include/dhcpserver.h b/extras/dhcpserver/include/dhcpserver.h
old mode 100644
new mode 100755
index 62fa0ac..814b461
--- a/extras/dhcpserver/include/dhcpserver.h
+++ b/extras/dhcpserver/include/dhcpserver.h
@@ -18,6 +18,11 @@
 extern "C" {
 #endif
 
+typedef struct {
+    uint8_t hwaddr[6];
+	ip4_addr_t ipaddr;
+} dhcpserver_lease_t;
+
 /* Start DHCP server.
 
    Static IP of server should already be set and network interface enabled.
@@ -28,7 +33,7 @@ extern "C" {
 */
 void dhcpserver_start(const ip4_addr_t *first_client_addr, uint8_t max_leases);
 
-void dhcpserver_get_lease(const ip4_addr_t *first_client_addr, uint8_t max_leases);
+uint32_t dhcpserver_get_leases(dhcpserver_lease_t *leases, uint32_t capacity);
 
 /* Stop DHCP server.
  */
diff --git a/extras/kt0803l b/extras/kt0803l
new file mode 160000
index 0000000..32f7a13
--- /dev/null
+++ b/extras/kt0803l
@@ -0,0 +1 @@
+Subproject commit 32f7a131390d2f73f5260fa383383f1fae0e96db
diff --git a/extras/mcpwm b/extras/mcpwm
new file mode 160000
index 0000000..0f76d81
--- /dev/null
+++ b/extras/mcpwm
@@ -0,0 +1 @@
+Subproject commit 0f76d8141318899388c990c45c347ae5f37b9c07
diff --git a/extras/rda5807m b/extras/rda5807m
new file mode 160000
index 0000000..fc137d4
--- /dev/null
+++ b/extras/rda5807m
@@ -0,0 +1 @@
+Subproject commit fc137d42d5189a8d830f027fcd3c65c3048aa9ab
diff --git a/lwip/include/arch/cc.h b/lwip/include/arch/cc.h
index e7cf291..74fc332 100644
--- a/lwip/include/arch/cc.h
+++ b/lwip/include/arch/cc.h
@@ -101,6 +101,8 @@ typedef int sys_prot_t;
 #define LWIP_PLATFORM_HTONS(_n)  ((u16_t)((((_n) & 0xff) << 8) | (((_n) >> 8) & 0xff)))
 #define LWIP_PLATFORM_HTONL(_n)  ((u32_t)( (((_n) & 0xff) << 24) | (((_n) & 0xff00) << 8) | (((_n) >> 8)  & 0xff00) | (((_n) >> 24) & 0xff) ))
 
+#ifndef LWIP_RAND
 #define LWIP_RAND()                         hwrand()
+#endif
 
 #endif /* __ARCH_CC_H__ */
diff --git a/lwip/include/lwipopts.h b/lwip/include/lwipopts.h
old mode 100644
new mode 100755
index 4d69eda..c86dace
--- a/lwip/include/lwipopts.h
+++ b/lwip/include/lwipopts.h
@@ -221,6 +221,9 @@
    ---------- RAW options ----------
    ---------------------------------
 */
+#ifndef LWIP_RAW
+#define LWIP_RAW                       1
+#endif
 
 /*
    ----------------------------------
diff --git a/lwip/lwip b/lwip/lwip
index 74676d4..e5bf00e 160000
--- a/lwip/lwip
+++ b/lwip/lwip
@@ -1 +1 @@
-Subproject commit 74676d46f0bc5ed82515f8e247008b7c45ec6cf6
+Subproject commit e5bf00eab33ad371994368dbe53f7b2d456ec884