text: /*
   * Copyright (C) 2017 - 2018 Xilinx, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice,
   *    this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
   * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
   * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
   * OF SUCH DAMAGE.
   *
   */
  
  #include <sleep.h>
  #include "netif/xadapter.h"
  #include "platform_config.h"
  #include "xil_printf.h"
  #include "lwip/init.h"
  #include "lwip/inet.h"
  
  #if LWIP_DHCP==1
  #include "lwip/dhcp.h"
  extern volatile int dhcp_timoutcntr;
  err_t dhcp_start(struct netif *netif);
  #endif
  
  #ifdef XPS_BOARD_ZCU102
  #ifdef XPAR_XIICPS_0_DEVICE_ID
  int IicPhyReset(void);
  #endif
  #endif
  
  static int complete_nw_thread;
  
  void print_app_header();
  void start_application();
  
  #define THREAD_STACKSIZE 1024
  
  #define DEFAULT_IP_ADDRESS "192.168.1.10"
  #define DEFAULT_IP_MASK "255.255.255.0"
  #define DEFAULT_GW_ADDRESS "192.168.1.1"
  
  struct netif server_netif;
  
  static void print_ip(char *msg, ip_addr_t *ip)
  {
  	xil_printf(msg);
  	xil_printf("%d.%d.%d.%d\n\r", ip4_addr1(ip), ip4_addr2(ip),
  				ip4_addr3(ip), ip4_addr4(ip));
  }
  
  static void print_ip_settings(ip_addr_t *ip, ip_addr_t *mask, ip_addr_t *gw)
  {
  	print_ip("Board IP:       ", ip);
  	print_ip("Netmask :       ", mask);
  	print_ip("Gateway :       ", gw);
  }
  
  static void assign_default_ip(ip_addr_t *ip, ip_addr_t *mask, ip_addr_t *gw)
  {
  	int err;
  
  	xil_printf("Configuring default IP %s \r\n", DEFAULT_IP_ADDRESS);
  
  	err = inet_aton(DEFAULT_IP_ADDRESS, ip);
  	if(!err)
  		xil_printf("Invalid default IP address: %d\r\n", err);
  
  	err = inet_aton(DEFAULT_IP_MASK, mask);
  	if(!err)
  		xil_printf("Invalid default IP MASK: %d\r\n", err);
  
  	err = inet_aton(DEFAULT_GW_ADDRESS, gw);
  	if(!err)
  		xil_printf("Invalid default gateway address: %d\r\n", err);
  }
  
  void network_thread(void *p)
  {
  #if LWIP_DHCP==1
  	int mscnt = 0;
  #endif
  	/* the mac address of the board. this should be unique per board */
  	u8_t mac_ethernet_address[] = { 0x00, 0x0a, 0x35, 0x00, 0x01, 0x02 };
  
  	/* Add network interface to the netif_list, and set it as default */
  	if (!xemac_add(&server_netif, NULL, NULL, NULL, mac_ethernet_address,
  		PLATFORM_EMAC_BASEADDR)) {
  		xil_printf("Error adding N/W interface\r\n");
  		return;
  	}
  
  	netif_set_default(&server_netif);
  
  	/* specify that the network if is up */
  	netif_set_up(&server_netif);
  
  	/* start packet receive thread - required for lwIP operation */
  	sys_thread_new("xemacif_input_thread",
  			(void(*)(void*))xemacif_input_thread, &server_netif,
  			THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
  
  	complete_nw_thread = 1;
  
  #if LWIP_DHCP==1
  	dhcp_start(&server_netif);
  	while (1) {
  		vTaskDelay(DHCP_FINE_TIMER_MSECS / portTICK_RATE_MS);
  		dhcp_fine_tmr();
  		mscnt += DHCP_FINE_TIMER_MSECS;
  		if (mscnt >= DHCP_COARSE_TIMER_SECS*1000) {
  			dhcp_coarse_tmr();
  			mscnt = 0;
  		}
  	}
  #else
  	vTaskDelete(NULL);
  #endif
  }
  
  int main_thread()
  {
  
  #if LWIP_DHCP==1
  	int mscnt = 0;
  #endif
  
  #ifdef XPS_BOARD_ZCU102
  	IicPhyReset();
  #endif
  	xil_printf("\n\r\n\r");
  	xil_printf("-----lwIP Socket Mode UDP Client Application------\r\n");
  
  	/* initialize lwIP before calling sys_thread_new */
  	lwip_init();
  
  	/* any thread using lwIP should be created using sys_thread_new */
  	sys_thread_new("nw_thread", network_thread, NULL,
  			THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
  
  	while(!complete_nw_thread)
  		usleep(50);
  
  #if LWIP_DHCP==1
  	while (1) {
  		vTaskDelay(DHCP_FINE_TIMER_MSECS / portTICK_RATE_MS);
  		if (server_netif.ip_addr.addr) {
  			xil_printf("DHCP request success\r\n");
  			break;
  		}
  		mscnt += DHCP_FINE_TIMER_MSECS;
  		if (mscnt >= 10000) {
  			xil_printf("ERROR: DHCP request timed out\r\n");
  			assign_default_ip(&(server_netif.ip_addr),
  						&(server_netif.netmask),
  						&(server_netif.gw));
  			break;
  		}
  	}
  
  #else
  	assign_default_ip(&(server_netif.ip_addr), &(server_netif.netmask),
  				&(server_netif.gw));
  #endif
  
  	print_ip_settings(&(server_netif.ip_addr), &(server_netif.netmask),
  				&(server_netif.gw));
  	xil_printf("\r\n");
  
  	/* print all application headers */
  	print_app_header();
  	xil_printf("\r\n");
  
  	/* start the application*/
  	start_application();
  
  	vTaskDelete(NULL);
  	return 0;
  }
  
  int main()
  {
  	sys_thread_new("main_thread", (void(*)(void*))main_thread, 0,
  			THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
  	vTaskStartScheduler();
  	while(1);
  	return 0;
  }
  