text: /*
   * File      : at_socket_n58.c
   * This file is part of RT-Thread RTOS
   * COPYRIGHT (C) 2006 - 2020, RT-Thread Development Team
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Change Logs:
   * Date           Author            Notes
   * 2020-05-22     shuobatian        first version
   */
  
  #include <stdio.h>
  #include <string.h>
  #include <ctype.h>
  #include <at_device_n58.h>
  
  #if !defined(AT_SW_VERSION_NUM) || AT_SW_VERSION_NUM < 0x10300
  #error "This AT Client version is older, please check and update latest AT Client!"
  #endif
  
  #define LOG_TAG "at.dev"
  #include <at_log.h>
  
  #ifdef AT_DEVICE_USING_N58
  
  #define N58_WAIT_CONNECT_TIME 10000
  #define N58_THREAD_STACK_SIZE 2048
  #define N58_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX / 2)
  // #define N58_THREAD_PRIORITY 6
  
  static void n58_power_on(struct at_device *device)
  {
  
      struct at_device_n58 *n58 = RT_NULL;
  
      n58 = (struct at_device_n58 *)device->user_data;
  
      /* not nead to set pin configuration for n58 device power on */
  #if (N58_SAMPLE_POWER_PIN != -1)
  #if (N58_SAMPLE_STATUS_PIN != -1)
      if (n58->power_pin == -1 || n58->power_status_pin == -1)
      {
          return;
      }
  
      if (rt_pin_read(n58->power_status_pin) == PIN_HIGH)
      {
          return;
      }
      rt_pin_write(n58->power_pin, PIN_HIGH);
      while (rt_pin_read(n58->power_status_pin) == PIN_LOW)
      {
          rt_thread_mdelay(10);
      }
      rt_pin_write(n58->power_pin, PIN_LOW);
  #else
      if (n58->power_pin == -1)
      {
          return;
      }
      rt_pin_write(n58->power_pin, PIN_HIGH);
  #endif
  #endif
  }
  
  static void n58_power_off(struct at_device *device)
  {
      struct at_device_n58 *n58 = RT_NULL;
  
      n58 = (struct at_device_n58 *)device->user_data;
  
  #if (N58_SAMPLE_POWER_PIN != -1)
  #if (N58_SAMPLE_STATUS_PIN != -1)
      /* not nead to set pin configuration for n58 device power on */
      if (n58->power_pin == -1 || n58->power_status_pin == -1)
      {
          return;
      }
      if (rt_pin_read(n58->power_status_pin) == PIN_LOW)
      {
          return;
      }
  
      rt_pin_write(n58->power_pin, PIN_HIGH);
      while (rt_pin_read(n58->power_status_pin) == PIN_HIGH)
      {
          rt_thread_mdelay(10);
      }
      rt_pin_write(n58->power_pin, PIN_LOW);
  #else
      if (n58->power_pin == -1)
      {
          return;
      }
      rt_pin_write(n58->power_pin, PIN_LOW);
  #endif
  #endif
  }
  
  /* =============================  neoway n58 network interface operations ============================= */
  
  /* set n58 network interface device status and address information */
  static int n58_netdev_set_info(struct netdev *netdev)
  {
  #define N58_SET_INFO_RESP_SIZE 128
  #define N58_INFO_RESP_TIMO rt_tick_from_millisecond(300)
  
      int result = RT_EOK;
      //int at_result = 0;
      ip_addr_t addr;
      at_response_t resp = RT_NULL;
      struct at_device *device = RT_NULL;
  
      if (netdev == RT_NULL)
      {
          LOG_E("input network interface device is NULL.");
          return -RT_ERROR;
      }
      LOG_D("netdev set info");
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
          return -RT_ERROR;
      }
  
      /* set network interface device status */
      netdev_low_level_set_status(netdev, RT_TRUE);
      netdev_low_level_set_link_status(netdev, RT_TRUE);
      netdev_low_level_set_dhcp_status(netdev, RT_TRUE);
  
      resp = at_create_resp(N58_SET_INFO_RESP_SIZE, 0, N58_INFO_RESP_TIMO);
      if (resp == RT_NULL)
      {
          LOG_E("n58 device(%s) set IP address failed, no memory for response object.", device->name);
          result = -RT_ENOMEM;
          goto __exit;
      }
  
      /* set network interface device hardware address(IEMI) */
      {
  #define N58_NETDEV_HWADDR_LEN 8
  #define N58_IEMI_LEN 15
  
          char iemi[N58_IEMI_LEN] = {0};
          int i = 0, j = 0;
  
          /* send "AT+GSN" commond to get device IEMI */
          if (at_obj_exec_cmd(device->client, resp, "AT+CGSN") < 0)
          {
              result = -RT_ERROR;
              goto __exit;
          }
  
          if (at_resp_parse_line_args_by_kw(resp, "+CGSN:", "+CGSN: %s", iemi) <= 0)
          {
              LOG_E("n58 device(%s) IEMI get fail", device->name);
              result = -RT_ERROR;
              goto __exit;
          }
  
          netdev->hwaddr_len = N58_NETDEV_HWADDR_LEN;
          /* get hardware address by IEMI */
          for (i = 0, j = 0; i < N58_NETDEV_HWADDR_LEN && j < N58_IEMI_LEN; i++, j += 2)
          {
              if (j != N58_IEMI_LEN - 1)
              {
                  netdev->hwaddr[i] = (iemi[j] - '0') * 10 + (iemi[j + 1] - '0');
              }
              else
              {
                  netdev->hwaddr[i] = (iemi[j] - '0');
              }
          }
  
          LOG_D("hwaddr:%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X-%.2X,IEMI:%s", netdev->hwaddr[0],
                netdev->hwaddr[1], netdev->hwaddr[2], netdev->hwaddr[3], netdev->hwaddr[4],
                netdev->hwaddr[5], netdev->hwaddr[6], netdev->hwaddr[7], iemi);
      }
      LOG_D("get IP address");
      /* get network interface device IP address */
      {
  #define IP_ADDR_SIZE_MAX 32
          char ipaddr[IP_ADDR_SIZE_MAX] = {0};
  
          /* send "AT+XIIC?" commond to get IP address */
          if (at_obj_exec_cmd(device->client, resp, "AT+XIIC?") < 0)
          {
              result = -RT_ERROR;
              goto __exit;
          }
  
          if (at_resp_parse_line_args_by_kw(resp, "+XIIC:    ", "+XIIC:%*[^,],%s", ipaddr) <= 0)
          {
              LOG_E("n58 device(%s) prase \"AT+XIIC?\" commands resposne data error!", device->name);
              result = -RT_ERROR;
              goto __exit;
          }
  
          LOG_I("n58 device(%s) IP address: %s", device->name, ipaddr);
  
          /* set network interface address information */
          inet_aton(ipaddr, &addr);
          netdev_low_level_set_ipaddr(netdev, &addr);
      }
  
      /* set network interface device dns server */
      {
  #define DNS_ADDR_SIZE_MAX 16
          char dns_server1[DNS_ADDR_SIZE_MAX] = {0}, dns_server2[DNS_ADDR_SIZE_MAX] = {0};
  
          /* send "AT+DNSSERVER?" commond to get DNS servers address */
          if (at_obj_exec_cmd(device->client, resp, "AT+DNSSERVER?") < 0)
          {
              result = -RT_ERROR;
              goto __exit;
          }
  
          if (at_resp_parse_line_args_by_kw(resp, "+DNSSERVER: ", "+DNSSERVER: dns1:%[^,],dns2:%s\r\n", dns_server1, dns_server2) <= 0)
          {
              LOG_E("Prase \"AT+DNSSERVER?\" commands resposne data error!");
              result = -RT_ERROR;
              goto __exit;
          }
  
          LOG_D("n58 device(%s) primary DNS server address: %s", device->name, dns_server1);
          LOG_D("n58 device(%s) secondary DNS server address: %s", device->name, dns_server2);
  
          inet_aton(dns_server1, &addr);
          netdev_low_level_set_dns_server(netdev, 0, &addr);
  
          inet_aton(dns_server2, &addr);
          netdev_low_level_set_dns_server(netdev, 1, &addr);
      }
  
  __exit:
      if (resp)
      {
          at_delete_resp(resp);
      }
  
      return result;
  }
  
  static void check_link_status_entry(void *parameter)
  {
  #define N58_LINK_STATUS_OK 1
  #define N58_LINK_RESP_SIZE 64
  #define N58_LINK_RESP_TIMO (3 * RT_TICK_PER_SECOND)
  #define N58_LINK_DELAY_TIME (30 * RT_TICK_PER_SECOND)
  
      at_response_t resp = RT_NULL;
      int result_code, link_status;
      struct at_device *device = RT_NULL;
  
  #if (N58_SAMPLE_STATUS_PIN != -1)
      struct at_device_n58 *n58 = RT_NULL;
  #endif
  
      char parsed_data[10] = {0};
      struct netdev *netdev = (struct netdev *)parameter;
  
      LOG_D("statrt n58 device(%s) link status check \n");
  
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
          return;
      }
  
  #if (N58_SAMPLE_STATUS_PIN != -1)
      n58 = (struct at_device_n58 *)device->user_data;
  #endif
  
      resp = at_create_resp(N58_LINK_RESP_SIZE, 0, N58_LINK_RESP_TIMO);
      if (resp == RT_NULL)
      {
          LOG_E("n58 device(%s) set check link status failed, no memory for response object.", device->name);
          return;
      }
  
      while (1)
      {
          /* send "AT+CEREG?" commond  to check netweork interface device link status */
          if (at_obj_exec_cmd(device->client, resp, "AT+CEREG?") < 0)
          {
              rt_thread_mdelay(N58_LINK_DELAY_TIME);
              LOG_E("n58 device(%s) send cgreg failed", device->name);
              continue;
          }
  
          link_status = -1;
          at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %d,%d\r\n", &result_code, &link_status);
  
          /* check the network interface device link status  */
          if ((N58_LINK_STATUS_OK == link_status) != netdev_is_link_up(netdev))
          {
              netdev_low_level_set_link_status(netdev, (N58_LINK_STATUS_OK == link_status));
          }
  
  #if (N58_SAMPLE_STATUS_PIN != -1)
          if (rt_pin_read(n58->power_status_pin) == PIN_HIGH) //check the module_status , if moduble_status is Low, user can do your logic here
          {
  #endif
              if (at_obj_exec_cmd(device->client, resp, "AT+CSQ") == 0)
              {
                  at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
                  if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
                  {
                      LOG_D("n58 device(%s) signal strength: %s", device->name, parsed_data);
                  }
              }
  #if (N58_SAMPLE_STATUS_PIN != -1)
          }
          else
          {
              LOG_E("netdev name(%s) status pin is low", device->name);
              netdev_low_level_set_link_status(netdev, RT_FALSE);
              return;
          }
  #endif
          rt_thread_mdelay(N58_LINK_DELAY_TIME);
      }
  }
  
  static int n58_netdev_check_link_status(struct netdev *netdev)
  {
  
  #define N58_LINK_THREAD_TICK 20
  #define N58_LINK_THREAD_STACK_SIZE 1024
  #define N58_LINK_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX - 22)
  
      rt_thread_t tid;
      char tname[RT_NAME_MAX] = {0};
  
      if (netdev == RT_NULL)
      {
          LOG_E("input network interface device is NULL.\n");
          return -RT_ERROR;
      }
  
      rt_snprintf(tname, RT_NAME_MAX, "%s_link", netdev->name);
  
      tid = rt_thread_create(tname, check_link_status_entry, (void *)netdev,
                             N58_LINK_THREAD_STACK_SIZE, N58_LINK_THREAD_PRIORITY, N58_LINK_THREAD_TICK);
      if (tid)
      {
          rt_thread_startup(tid);
      }
  
      return RT_EOK;
  }
  
  static int n58_net_init(struct at_device *device);
  
  static int n58_netdev_set_up(struct netdev *netdev)
  {
      struct at_device *device = RT_NULL;
  
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
          return -RT_ERROR;
      }
  
      if (device->is_init == RT_FALSE)
      {
          n58_net_init(device);
          device->is_init = RT_TRUE;
  
          netdev_low_level_set_status(netdev, RT_TRUE);
          LOG_D("the network interface device(%s) set up status.", netdev->name);
      }
  
      return RT_EOK;
  }
  
  static int n58_netdev_set_down(struct netdev *netdev)
  {
      struct at_device *device = RT_NULL;
  
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
          return -RT_ERROR;
      }
  
      if (device->is_init == RT_TRUE)
      {
          n58_power_off(device);
          device->is_init = RT_FALSE;
  
          netdev_low_level_set_status(netdev, RT_FALSE);
          LOG_D("the network interface device(%s) set down status.", netdev->name);
      }
  
      return RT_EOK;
  }
  
  static int n58_netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, ip_addr_t *dns_server)
  {
  #define N58_DNS_RESP_LEN 128
  #define N58_DNS_RESP_TIMEO rt_tick_from_millisecond(300)
  
      int result = RT_EOK;
      at_response_t resp = RT_NULL;
      struct at_device *device = RT_NULL;
  
      RT_ASSERT(netdev);
      RT_ASSERT(dns_server);
  
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
      }
  
      resp = at_create_resp(N58_DNS_RESP_LEN, 0, N58_DNS_RESP_TIMEO);
      if (resp == RT_NULL)
      {
          LOG_D("n58 set dns server failed, no memory for response object.");
          result = -RT_ENOMEM;
          goto __exit;
      }
      LOG_D("dns_num:%d,dns_server:%s", dns_num, inet_ntoa(*dns_server));
      /* send "AT+CDNSCFG=<pri_dns>[,<sec_dns>]" commond to set dns servers */
      if (at_obj_exec_cmd(device->client, resp, "AT+DNSSERVER=%d,%s", dns_num + 1, inet_ntoa(*dns_server)) < 0)
      {
          result = -RT_ERROR;
          goto __exit;
      }
  
      netdev_low_level_set_dns_server(netdev, dns_num, dns_server);
  
  __exit:
      if (resp)
      {
          at_delete_resp(resp);
      }
      result = -RT_ERROR;
  
      return result;
  }
  
  #ifdef NETDEV_USING_PING
  static int n58_netdev_ping(struct netdev *netdev, const char *host,
                             size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
  {
  #define N58_PING_RESP_SIZE 512
  #define N58_PING_IP_SIZE 16
  #define N58_PING_TIMEO (5 * RT_TICK_PER_SECOND)
  
  #define N58_PING_ERR_TIME 600
  #define N58_PING_ERR_TTL 255
  
      int result = RT_EOK;
      int bytes, time, ttl, i;
      char ip_addr[N58_PING_IP_SIZE] = {0};
      at_response_t resp = RT_NULL;
      struct at_device *device = RT_NULL;
  
      RT_ASSERT(netdev);
      RT_ASSERT(host);
      RT_ASSERT(ping_resp);
  
      device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
      if (device == RT_NULL)
      {
          LOG_E("get n58 device by netdev name(%s) failed.", netdev->name);
          return -RT_ERROR;
      }
  
      for (i = 0; i < rt_strlen(host) && !isalpha(host[i]); i++)
          ;
  
      resp = at_create_resp(N58_PING_RESP_SIZE, 7, N58_PING_TIMEO);
      if (resp == RT_NULL)
      {
          LOG_E("n58 device(%s) set dns server failed, no memory for response object.", device->name);
          result = -RT_ERROR;
          goto __exit;
      }
  
      /* send "AT+PING=<ip>[,<timeout>,<size>,<num>]" commond to send ping request */
      /* n58 ping <size> ranges of ipv4(36-1500), ipv6(56-1500) */
      if (at_obj_exec_cmd(device->client, resp, "AT+PING=%s,%d,%d,1",
                          host, N58_PING_TIMEO / (RT_TICK_PER_SECOND / 10), data_len + 4) < 0)
      {
          result = -RT_ERROR;
          goto __exit;
      }
      //Reply from 39.156.69.79: bytes= 36 time = 148(ms), TTL = 255
      //Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d
      if (at_resp_parse_line_args_by_kw(resp, "Reply from ", "Reply from %[^:]: bytes= %d time = %d(ms), TTL = %d",
                                        ip_addr, &bytes, &time, &ttl) <= 0)
      {
          result = -RT_ERROR;
          goto __exit;
      }
  
      /* the ping request timeout expires, the response time settting to 600 and ttl setting to 255 */
      if (time == N58_PING_ERR_TIME && ttl == N58_PING_ERR_TTL)
      {
          result = -RT_ETIMEOUT;
          goto __exit;
      }
  
      inet_aton(ip_addr, &(ping_resp->ip_addr));
      ping_resp->data_len = data_len;
      ping_resp->ticks = time;
      ping_resp->ttl = ttl;
  
  __exit:
      if (resp)
      {
          at_delete_resp(resp);
      }
  
      return result;
  }
  #endif /* NETDEV_USING_PING */
  
  #ifdef NETDEV_USING_NETSTAT
  void n58_netdev_netstat(struct netdev *netdev)
  {
      // TODO netstat support
  }
  #endif /* NETDEV_USING_NETSTAT */
  
  const struct netdev_ops n58_netdev_ops =
      {
          n58_netdev_set_up,
          n58_netdev_set_down,
  
          RT_NULL,                   /* not support set ip, netmask, gatway address */
          n58_netdev_set_dns_server, //n58_netdev_set_dns_server,
          RT_NULL,                   /* not support set DHCP status */
  
  #ifdef NETDEV_USING_PING
          n58_netdev_ping,
  #endif
  #ifdef NETDEV_USING_NETSTAT
          n58_netdev_netstat,
  #endif
  };
  
  static struct netdev *n58_netdev_add(const char *netdev_name)
  {
  #define n58_NETDEV_MTU 1500
      struct netdev *netdev = RT_NULL;
  
      RT_ASSERT(netdev_name);
  
      netdev = (struct netdev *)rt_calloc(1, sizeof(struct netdev));
      if (netdev == RT_NULL)
      {
          LOG_E("no memory for n58 device(%s) netdev structure.", netdev_name);
          return RT_NULL;
      }
  
      netdev->mtu = n58_NETDEV_MTU;
      netdev->ops = &n58_netdev_ops;
  
  #ifdef SAL_USING_AT
      extern int sal_at_netdev_set_pf_info(struct netdev * netdev);
      /* set the network interface socket/netdb operations */
      sal_at_netdev_set_pf_info(netdev);
  #endif
  
      netdev_register(netdev, netdev_name, RT_NULL);
  
      return netdev;
  }
  
  /* =============================  n58 device operations ============================= */
  
  #define AT_SEND_CMD(client, resp, resp_line, timeout, cmd)                                      \
      do                                                                                          \
      {                                                                                           \
          (resp) = at_resp_set_info((resp), 128, (resp_line), rt_tick_from_millisecond(timeout)); \
          if (at_obj_exec_cmd((client), (resp), (cmd)) < 0)                                       \
          {                                                                                       \
              result = -RT_ERROR;                                                                 \
              goto __exit;                                                                        \
          }                                                                                       \
      } while (0)
  
  /* init for n58 */
  static void n58_init_thread_entry(void *parameter)
  {
  #define INIT_RETRY 5
  #define CPIN_RETRY 10
  #define CSQ_RETRY 10
  #define CREG_RETRY 60
  #define CEREG_RETRY 30
  #define CCID_SIZE 20
  
      int i, retry_num = INIT_RETRY;
      char ccid[CCID_SIZE] = {0};
      char parsed_data[10] = {0};
      rt_err_t result = RT_EOK;
      at_response_t resp = RT_NULL;
      struct at_device *device = (struct at_device *)parameter;
      struct at_client *client = device->client;
  
      resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
      if (resp == RT_NULL)
      {
          LOG_E("no memory for n58 device(%s) response structure.", device->name);
          return;
      }
  
      while (retry_num--)
      {
          rt_memset(parsed_data, 0, sizeof(parsed_data));
          rt_thread_mdelay(1000);
          n58_power_on(device);
          rt_thread_mdelay(5000); //check the n58 hardware manual, when we use the pow_key to start n58, it takes about 20s,so we put 25s here to ensure starting n58 normally.
  
          LOG_I("start initializing the n58 device(%s)", device->name);
          /* wait n58 startup finish */
          if (at_client_obj_wait_connect(client, N58_WAIT_CONNECT_TIME))
          {
              result = -RT_ETIMEOUT;
              goto __exit;
          }
  
          /* disable echo */
          AT_SEND_CMD(client, resp, 0, 300, "ATE0");
          /* get module version */
          AT_SEND_CMD(client, resp, 0, 300, "ATI");
          /* show module version */
          for (i = 0; i < (int)resp->line_counts - 1; i++)
          {
              LOG_I("%s", at_resp_get_line(resp, i + 1));
          }
          /* check SIM card */
          for (i = 0; i < CPIN_RETRY; i++)
          {
              at_resp_set_info(resp, 128, 2, 5 * RT_TICK_PER_SECOND);
              if (at_obj_exec_cmd(client, resp, "AT+CCID") < 0)
              {
                  LOG_E("AT+CCID ERROR! retry:%d.", i);
                  rt_thread_mdelay(1000);
                  continue;
              }
  
              if (at_resp_parse_line_args_by_kw(resp, "+CCID:", "+CCID: %s", ccid))
              {
                  LOG_I("n58 device(%s) SIM card detection success.", device->name);
                  LOG_I("CCID: %s", ccid);
                  break;
              }
              rt_thread_mdelay(1000);
          }
          if (i == CPIN_RETRY)
          {
              LOG_E("n58 device(%s) SIM card detection failed.", device->name);
              result = -RT_ERROR;
              goto __exit;
          }
  
          /* waiting for dirty data to be digested */
          rt_thread_mdelay(500);
          LOG_I("register network!");
          /* check the GSM network is registered */
          for (i = 0; i < CREG_RETRY; i++)
          {
              AT_SEND_CMD(client, resp, 0, 1000, "AT+CREG?");
              at_resp_parse_line_args_by_kw(resp, "+CREG:", "+CREG: %s", &parsed_data);
              if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
                  !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
              {
                  LOG_I("n58 device(%s) network is registered(%s),", device->name, parsed_data);
                  break;
              }
              rt_thread_mdelay(1000);
              LOG_W("AT+CREG? Retry:%d", i);
          }
          if (i == CREG_RETRY)
          {
              LOG_E("n58 device(%s) network is register failed(%s).", device->name, parsed_data);
              rt_thread_mdelay(10);
              result = -RT_ERROR;
              goto __exit;
          }
          /* check the GPRS network is registered */
          for (i = 0; i < CEREG_RETRY; i++)
          {
              AT_SEND_CMD(client, resp, 0, 300, "AT+CEREG?");
              at_resp_parse_line_args_by_kw(resp, "+CEREG:", "+CEREG: %s", &parsed_data);
              if (!strncmp(parsed_data, "0,1", sizeof(parsed_data)) ||
                  !strncmp(parsed_data, "0,5", sizeof(parsed_data)))
              {
                  LOG_I("n58 device(%s) GPRS network is registered(%s).", device->name, parsed_data);
                  break;
              }
              rt_thread_mdelay(1000);
          }
          if (i == CEREG_RETRY)
          {
              LOG_E("n58 device(%s) GPRS network is register failed(%s).", device->name, parsed_data);
              result = -RT_ERROR;
              goto __exit;
          }
  
          /* check signal strength */
          for (i = 0; i < CSQ_RETRY; i++)
          {
              AT_SEND_CMD(client, resp, 0, 300, "AT+CSQ");
              at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ: %s", &parsed_data);
              if (strncmp(parsed_data, "99,99", sizeof(parsed_data)))
              {
                  LOG_I("n58 device(%s) signal strength: %s", device->name, parsed_data);
                  break;
              }
              rt_thread_mdelay(1000);
          }
          if (i == CSQ_RETRY)
          {
              LOG_E("n58 device(%s) signal strength check failed (%s)", device->name, parsed_data);
              result = -RT_ERROR;
              goto __exit;
          }
  
          AT_SEND_CMD(client, resp, 0, 300, "AT+COPS=3,0");
          AT_SEND_CMD(client, resp, 0, 300, "AT+COPS?");
          at_resp_parse_line_args_by_kw(resp, "+COPS:", "+COPS: %*[^\"]\"%[^\"]", &parsed_data);
  
          if (rt_strcmp(parsed_data, "ChinaMobile") == 0)
          {
              /* "CMCC" */
              LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
          }
          else if (rt_strcmp(parsed_data, "ChinaUnicom") == 0)
          {
              /* "UNICOM" */
              LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
          }
          else if (rt_strcmp(parsed_data, "ChinaTelecom") == 0)
          {
              /* "CT" */
              LOG_I("n58 device(%s) network operator: %s", device->name, parsed_data);
          }
          else
          {
              LOG_E("n58 device(%s) Unknown carrier:%s", device->name, parsed_data);
          }
          /* the device default response timeout is 150 seconds, but it set to 20 seconds is convenient to use. */
          AT_SEND_CMD(client, resp, 0, 20 * 1000, "AT+XIIC=1");
  
          AT_SEND_CMD(client, resp, 0, 300, "AT+XIIC?");
          if (at_resp_get_line_by_kw(resp, "ERROR") != RT_NULL)
          {
              LOG_E("n58 device(%s) get the local address failed.", device->name);
              result = -RT_ERROR;
              goto __exit;
          }
          result = RT_EOK;
  
          AT_SEND_CMD(client, resp, 0, 300, "AT+RECVMODE=1"); //set direct receive
  
          rt_thread_mdelay(2000); //wait for the module to process
  
      __exit:
          if (result == RT_EOK)
          {
              break;
          }
          else
          {
              /* power off the n58 device */
              n58_power_off(device);
              rt_thread_mdelay(1000);
  
              LOG_I("n58 device(%s) initialize retry...", device->name);
          }
      }
  
      if (resp)
      {
          at_delete_resp(resp);
      }
  
      if (result == RT_EOK)
      {
          /* set network interface device status and address information */
          n58_netdev_set_info(device->netdev);
          n58_netdev_check_link_status(device->netdev);
          LOG_I("n58 device(%s) network initialize success!", device->name);
      }
      else
      {
          LOG_E("n58 device(%s) network initialize failed(%d)!", device->name, result);
      }
  }
  
  static int n58_net_init(struct at_device *device)
  {
  #ifdef AT_DEVICE_N58_INIT_ASYN
      rt_thread_t tid;
      tid = rt_thread_create("n58_net_init", n58_init_thread_entry, (void *)device,
                             N58_THREAD_STACK_SIZE, N58_THREAD_PRIORITY, 20);
      if (tid)
      {
          rt_thread_startup(tid);
      }
      else
      {
          LOG_E("create n58 device(%s) initialization thread failed.", device->name);
          return -RT_ERROR;
      }
  #else
      n58_init_thread_entry(device);
  #endif /* AT_DEVICE_N58_INIT_ASYN */
  
      return RT_EOK;
  }
  
  static void urc_func(struct at_client *client, const char *data, rt_size_t size)
  {
      RT_ASSERT(data);
  
      LOG_I("URC data : %.*s", size, data);
  }
  
  /* n58 device URC table for the device control */
  static const struct at_urc urc_table[] =
      {
          {"+PBREADY", "\r\n", urc_func},
          {"CLOSED", "\r\n", urc_func},
  };
  
  static int n58_init(struct at_device *device)
  {
      struct at_device_n58 *n58 = (struct at_device_n58 *)device->user_data;
  
      /* initialize AT client */
      at_client_init(n58->client_name, n58->recv_line_num);
  
      device->client = at_client_get(n58->client_name);
      if (device->client == RT_NULL)
      {
          LOG_E("n58 device(%s) initialize failed, get AT client(%s) failed.", n58->device_name, n58->client_name);
          return -RT_ERROR;
      }
  
      /* register URC data execution function  */
      at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
  
  #ifdef AT_USING_SOCKET
      n58_socket_init(device);
  #endif
  
      /* add n58 device to the netdev list */
      device->netdev = n58_netdev_add(n58->device_name);
      if (device->netdev == RT_NULL)
      {
          LOG_E("n58 device(%s) initialize failed, get network interface device failed.", n58->device_name);
          return -RT_ERROR;
      }
  
      /* initialize n58 pin configuration */
      if (n58->power_pin != -1)
      {
          rt_pin_mode(n58->power_pin, PIN_MODE_OUTPUT);
      }
  
      if (n58->power_status_pin != -1)
      {
          rt_pin_mode(n58->power_status_pin, PIN_MODE_INPUT);
      }
  
      /* initialize n58 device network */
      return n58_netdev_set_up(device->netdev);
  }
  
  static int n58_deinit(struct at_device *device)
  {
      return n58_netdev_set_down(device->netdev);
  }
  
  static int n58_reset(struct at_device *device)
  {
      int result = RT_EOK;
      struct at_client *client = device->client;
  
  /* n58 only poweroff cmd,not support reboot.*/
  /* use power pin reboot */
  #if (N58_SAMPLE_POWER_PIN != -1)
      rt_pin_write(N58_SAMPLE_POWER_PIN, 0);
      rt_thread_mdelay(500);
      rt_pin_write(N58_SAMPLE_POWER_PIN, 1);
  
      rt_thread_mdelay(1000);
  
      /* waiting 10 seconds for n58 device reset */
      device->is_init = RT_FALSE;
      if (at_client_obj_wait_connect(client, N58_WAIT_CONNECT_TIME))
      {
          return -RT_ETIMEOUT;
      }
  
      /* initialize n58 device network */
      n58_net_init(device);
  
      device->is_init = RT_TRUE;
  #else
      result = -RT_ERROR;
  #endif
  
      return result;
  }
  
  static int n58_control(struct at_device *device, int cmd, void *arg)
  {
      int result = -RT_ERROR;
  
      RT_ASSERT(device);
  
      switch (cmd)
      {
      case AT_DEVICE_CTRL_POWER_ON:
      case AT_DEVICE_CTRL_POWER_OFF:
      case AT_DEVICE_CTRL_LOW_POWER:
      case AT_DEVICE_CTRL_SLEEP:
      case AT_DEVICE_CTRL_WAKEUP:
      case AT_DEVICE_CTRL_NET_CONN:
      case AT_DEVICE_CTRL_NET_DISCONN:
      case AT_DEVICE_CTRL_SET_WIFI_INFO:
      case AT_DEVICE_CTRL_GET_SIGNAL:
      case AT_DEVICE_CTRL_GET_GPS:
      case AT_DEVICE_CTRL_GET_VER:
          LOG_W("n58 not support the control command(%d).", cmd);
          break;
      case AT_DEVICE_CTRL_RESET:
          result = n58_reset(device);
          break;
      default:
          LOG_E("input error control command(%d).", cmd);
          break;
      }
  
      return result;
  }
  
  const struct at_device_ops n58_device_ops =
      {
          n58_init,
          n58_deinit,
          n58_control,
  };
  
  static int n58_device_class_register(void)
  {
      struct at_device_class *class = RT_NULL;
  
      class = (struct at_device_class *)rt_calloc(1, sizeof(struct at_device_class));
      if (class == RT_NULL)
      {
          LOG_E("no memory for n58 device class create.");
          return -RT_ENOMEM;
      }
  
      /* fill n58 device class object */
  #ifdef AT_USING_SOCKET
      n58_socket_class_register(class);
  #endif
      class->device_ops = &n58_device_ops;
  
      return at_device_class_register(class, AT_DEVICE_CLASS_N58);
  }
  INIT_DEVICE_EXPORT(n58_device_class_register);
  
  #endif /* AT_DEVICE_USING_N58 */
  