Update lwIP byte alignment to make Zynq pings more reliable.

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/FreeRTOSConfig.h

@@ -218,10 +218,10 @@ Zynq MPU. */
 #define configMAC_ADDR5	0x16
 
 /* IP address configuration. */
-#define configIP_ADDR0		10
+#define configIP_ADDR0		172
-#define configIP_ADDR1		134
+#define configIP_ADDR1		25
-#define configIP_ADDR2		134
+#define configIP_ADDR2		218
-#define configIP_ADDR3		210
+#define configIP_ADDR3		200
 
 /* Netmask configuration. */
 #define configNET_MASK0		255

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/lwIP_port/netif/xadapter.c

@@ -201,7 +201,7 @@ xemacif_input_thread(struct netif *netif)
 		 * This semaphore is set by the packet receive interrupt
 		 * routine.
 		 */
-		sys_sem_wait(&emac->sem_rx_data_available);
+		sys_arch_sem_wait( &emac->sem_rx_data_available, 250 / portTICK_PERIOD_MS );
 
 		/* move all received packets to lwIP */
 		xemacif_input(netif);

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/Full_Demo/lwIP_port/sys_arch.c

@@ -276,15 +276,10 @@ err_t sys_sem_new( sys_sem_t *pxSemaphore, u8_t ucCount )
 {
 err_t xReturn = ERR_MEM;
 
-	vSemaphoreCreateBinary( ( *pxSemaphore ) );
+	*pxSemaphore = xSemaphoreCreateCounting( 0xffff, ( unsigned long ) ucCount );
 
 	if( *pxSemaphore != NULL )
 	{
-		if( ucCount == 0U )
-		{
-			xSemaphoreTake( *pxSemaphore, 1UL );
-		}
-
 		xReturn = ERR_OK;
 		SYS_STATS_INC_USED( sem );
 	}

FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/lwipopts.h

@@ -109,7 +109,7 @@ void vLwipAppsReleaseTxBuffer( void );
    byte alignment -> define MEM_ALIGNMENT to 2. */
 /* MSVC port: intel processors don't need 4-byte alignment,
    but are faster that way! */
-#define MEM_ALIGNMENT			4
+#define MEM_ALIGNMENT			64
 
 /* MEM_SIZE: the size of the heap memory. If the application will send
 a lot of data that needs to be copied, this should be set high. */
@@ -148,10 +148,10 @@ a lot of data that needs to be copied, this should be set high. */
 /* The following four are used only with the sequential API and can be
    set to 0 if the application only will use the raw API. */
 /* MEMP_NUM_NETBUF: the number of struct netbufs. */
-#define MEMP_NUM_NETBUF         0
+#define MEMP_NUM_NETBUF         8
 
 /* MEMP_NUM_NETCONN: the number of struct netconns. */
-#define MEMP_NUM_NETCONN        10
+#define MEMP_NUM_NETCONN        16
 
 /* MEMP_NUM_TCPIP_MSG_*: the number of struct tcpip_msg, which is used
    for sequential API communication and incoming packets. Used in
@@ -198,6 +198,13 @@ a lot of data that needs to be copied, this should be set high. */
    TCP_SND_BUF/TCP_MSS for things to work. */
 #define TCP_SND_QUEUELEN		(16 * TCP_SND_BUF/TCP_MSS)
 
+#define CHECKSUM_GEN_TCP 	0
+#define CHECKSUM_GEN_UDP 	0
+#define CHECKSUM_GEN_IP  	0
+#define CHECKSUM_CHECK_TCP  0
+#define CHECKSUM_CHECK_UDP  0
+#define CHECKSUM_CHECK_IP 	0
+
 /* TCP writable space (bytes). This must be less than or equal
    to TCP_SND_BUF. It is the amount of space which must be
    available in the tcp snd_buf for select to return writable */
@@ -227,10 +234,15 @@ a lot of data that needs to be copied, this should be set high. */
 
 /* IP reassembly and segmentation.These are orthogonal even
  * if they both deal with IP fragments */
-#define IP_REASSEMBLY			0
+#define IP_REASSEMBLY			1
-#define IP_REASS_MAX_PBUFS		10
+#define IP_REASS_MAX_PBUFS		128
 #define MEMP_NUM_REASSDATA		10
-#define IP_FRAG					0
+#define IP_FRAG					1
+
+#define IP_OPTIONS 0
+#define IP_FRAG_MAX_MTU 1500
+#define IP_DEFAULT_TTL 255
+#define LWIP_CHKSUM_ALGORITHM 3
 
 
 /* ---------- ICMP options ---------- */
@@ -278,6 +290,15 @@ a lot of data that needs to be copied, this should be set high. */
 #endif /* LWIP_STATS */
 
 
+#define NO_SYS_NO_TIMERS 1
+#define MEMP_SEPARATE_POOLS 1
+#define MEMP_NUM_FRAG_PBUF 256
+#define IP_OPTIONS_ALLOWED 0
+#define TCP_OVERSIZE TCP_MSS
+#define LWIP_COMPAT_MUTEX 0
+#define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 1
+
+
 /* ---------- PPP options ---------- */
 
 #define PPP_SUPPORT			 0	  /* Set > 0 for PPP */