Merge pull request #103 from luhuadong/develop

Add bc28 class

SConscript

@@ -129,7 +129,16 @@ if GetDepend(['AT_DEVICE_USING_M6315']):
         src += Glob('class/m6315/at_socket_m6315.c')
     if GetDepend(['AT_DEVICE_M6315_SAMPLE']):
         src += Glob('samples/at_sample_m6315.c')            
-        
+
+# BC28
+if GetDepend(['AT_DEVICE_USING_BC28']):
+    path += [cwd + '/class/bc28']
+    src += Glob('class/bc28/at_device_bc28.c')
+    if GetDepend(['AT_USING_SOCKET']):
+        src += Glob('class/bc28/at_socket_bc28.c')
+    if GetDepend(['AT_DEVICE_BC28_SAMPLE']):
+        src += Glob('samples/at_sample_bc28.c')
+
 group = DefineGroup('at_device', src, depend = ['PKG_USING_AT_DEVICE'], CPPPATH = path)
 
 Return('group')

class/bc28/at_device_bc28.c

@@ -0,0 +1,953 @@
+ /*
+ * File      : at_device_bc28.c
+ * This file is part of RT-Thread RTOS
+ * Copyright (c) 2020, RudyLo <luhuadong@163.com>
+ * 
+ *  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
+ * 2020-02-12     luhuadong         first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_bc28.h>
+
+#define LOG_TAG                        "at.dev.bc28"
+#include <at_log.h>
+
+#ifdef AT_DEVICE_USING_BC28
+
+#define BC28_WAIT_CONNECT_TIME          5000
+#define BC28_THREAD_STACK_SIZE          2048
+#define BC28_THREAD_PRIORITY            (RT_THREAD_PRIORITY_MAX/2)
+
+static int bc28_sleep(struct at_device *device)
+{
+    return(RT_EOK);
+}
+
+static int bc28_wakeup(struct at_device *device)
+{
+    return(RT_EOK);
+}
+
+static int bc28_reset(struct at_device *device)
+{
+    struct at_device_bc28 *bc28 = (struct at_device_bc28 *)device->user_data;
+
+    rt_pin_mode(bc28->power_pin, PIN_MODE_OUTPUT);
+    rt_pin_write(bc28->power_pin, PIN_HIGH);
+    rt_thread_mdelay(300);
+    rt_pin_write(bc28->power_pin, PIN_LOW);
+    bc28->power_status = 1;
+
+    return(RT_EOK);
+}
+
+static int bc28_check_link_status(struct at_device *device)
+{
+    at_response_t resp = RT_NULL;
+    struct at_device_bc28 *bc28 = RT_NULL;
+    int result = -RT_ERROR;
+    
+    bc28 = (struct at_device_bc28 *)device->user_data;
+    if ( ! bc28->power_status) // power off
+    {
+        LOG_E("the power is off.");
+        return(-RT_ERROR);
+    }
+    if (bc28->sleep_status)    // is sleep status
+    {
+        if (bc28->power_pin != -1)
+        {
+            rt_pin_write(bc28->power_pin, PIN_HIGH);
+            rt_thread_mdelay(100);
+            rt_pin_write(bc28->power_pin, PIN_LOW);
+            rt_thread_mdelay(200);
+        }
+    }
+    
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return(-RT_ERROR);
+    }
+
+    result = -RT_ERROR;
+    if (at_obj_exec_cmd(device->client, resp, "AT+CGATT?") == RT_EOK)
+    {
+        int link_stat = 0;
+        if (at_resp_parse_line_args_by_kw(resp, "+CGATT:", "+CGATT:%d", &link_stat) > 0)
+        {
+            if (link_stat == 1)
+            {
+                result = RT_EOK;
+            }
+        }
+    }
+
+    at_delete_resp(resp);    
+    return(result);
+}
+
+/* =============================  bc28 network interface operations ============================= */
+/* set bc28 network interface device status and address information */
+static int bc28_netdev_set_info(struct netdev *netdev)
+{
+#define BC28_INFO_RESP_SIZE        128
+#define BC28_INFO_RESP_TIMOUT      rt_tick_from_millisecond(5000)
+
+    int result = RT_EOK;
+    ip_addr_t addr;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+
+    RT_ASSERT(netdev);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%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(BC28_INFO_RESP_SIZE, 0, BC28_INFO_RESP_TIMOUT);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* set network interface device hardware address(IMEI) */
+    {
+        #define BC28_NETDEV_HWADDR_LEN   8
+        #define BC28_IMEI_LEN            15
+
+        char imei[BC28_IMEI_LEN] = {0};
+        int i = 0, j = 0;
+
+        /* send "AT+CGSN=1" commond to get device IMEI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGSN=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        if (at_resp_parse_line_args(resp, 2, "+CGSN:%s", imei) <= 0)
+        {
+            LOG_E("%s device prase \"AT+CGSN=1\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        LOG_D("%s device IMEI number: %s", device->name, imei);
+
+        netdev->hwaddr_len = BC28_NETDEV_HWADDR_LEN;
+        /* get hardware address by IMEI */
+        for (i = 0, j = 0; i < BC28_NETDEV_HWADDR_LEN && j < BC28_IMEI_LEN; i++, j+=2)
+        {
+            if (j != BC28_IMEI_LEN - 1)
+            {
+                netdev->hwaddr[i] = (imei[j] - '0') * 10 + (imei[j + 1] - '0');
+            }
+            else
+            {
+                netdev->hwaddr[i] = (imei[j] - '0');
+            }
+        }
+    }
+
+    /* set network interface device IP address */
+    {
+        #define IP_ADDR_SIZE_MAX    16
+        char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+        
+        /* send "AT+CGPADDR" commond to get IP address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGPADDR") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* parse response data "+CGPADDR: 0,<IP_address>" */
+        if (at_resp_parse_line_args_by_kw(resp, "+CGPADDR:", "+CGPADDR:%*d,%s", ipaddr) <= 0)
+        {
+            LOG_E("%s device \"AT+CGPADDR\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_D("%s device 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+QIDNSCFG?" commond to get DNS servers address */
+        if (at_obj_exec_cmd(device->client, resp, "AT+QIDNSCFG?") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* parse response data "PrimaryDns:<pri_dns>" 
+         *                     "SecondaryDns:<sec_dns>" 
+        */
+        if (at_resp_parse_line_args_by_kw(resp, "PrimaryDns:", "PrimaryDns: %s", dns_server1) <= 0)
+        {
+            LOG_E("%s device prase \"AT+QIDNSCFG?\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        if (at_resp_parse_line_args_by_kw(resp, "SecondaryDns:", "SecondaryDns: %s", dns_server2) <= 0)
+        {
+            LOG_E("%s device prase \"AT+QIDNSCFG?\" cmd error.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        LOG_D("%s device primary DNS server address: %s", device->name, dns_server1);
+        LOG_D("%s device 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 bc28_check_link_status_entry(void *parameter)
+{
+#define BC28_LINK_DELAY_TIME    (60 * RT_TICK_PER_SECOND)
+
+    rt_bool_t is_link_up;
+    struct at_device *device = RT_NULL;
+    struct netdev *netdev = (struct netdev *) parameter;
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_NETDEV, netdev->name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", netdev->name);
+        return;
+    }
+    
+    while (1)
+    {
+        is_link_up = (bc28_check_link_status(device) == RT_EOK);
+
+        netdev_low_level_set_link_status(netdev, is_link_up);
+
+        rt_thread_delay(BC28_LINK_DELAY_TIME);
+    }
+}
+
+static int bc28_netdev_check_link_status(struct netdev *netdev)
+{
+#define BC28_LINK_THREAD_STACK_SIZE     (1024 + 512)
+#define BC28_LINK_THREAD_PRIORITY       (RT_THREAD_PRIORITY_MAX - 2)
+
+    rt_thread_t tid;
+    char tname[RT_NAME_MAX] = {0};
+
+    RT_ASSERT(netdev);
+
+    rt_snprintf(tname, RT_NAME_MAX, "%s", netdev->name);
+
+    /* create bc28 link status polling thread  */
+    tid = rt_thread_create(tname, bc28_check_link_status_entry, (void *)netdev,
+                           BC28_LINK_THREAD_STACK_SIZE, BC28_LINK_THREAD_PRIORITY, 20);
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+
+    return RT_EOK;
+}
+
+static int bc28_net_init(struct at_device *device);
+
+static int bc28_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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_FALSE)
+    {
+        bc28_net_init(device);
+        device->is_init = RT_TRUE;
+
+        netdev_low_level_set_status(netdev, RT_TRUE);
+        LOG_D("network interface device(%s) set up status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int bc28_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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    if (device->is_init == RT_TRUE)
+    {
+        //bc28_power_off(device);
+        device->is_init = RT_FALSE;
+
+        netdev_low_level_set_status(netdev, RT_FALSE);
+        LOG_D("network interface device(%s) set down status.", netdev->name);
+    }
+
+    return RT_EOK;
+}
+
+static int bc28_netdev_set_dns_server(struct netdev *netdev, uint8_t dns_num, ip_addr_t *dns_server)
+{
+#define BC28_DNS_RESP_LEN      64
+#define BC28_DNS_RESP_TIMEOUT  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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(BC28_DNS_RESP_LEN, 0, BC28_DNS_RESP_TIMEOUT);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
+    /* send "AT+QIDNSCFG=<pri_dns>[,<sec_dns>]" commond to set dns servers */
+    if (at_obj_exec_cmd(device->client, resp, "AT+QIDNSCFG=%d,%s", 
+        dns_num, inet_ntoa(*dns_server)) != RT_EOK)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    netdev_low_level_set_dns_server(netdev, dns_num, dns_server);
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+#ifdef AT_USING_SOCKET
+    int bc28_domain_resolve(const char *name, char ip[16]);
+#endif
+#ifdef NETDEV_USING_PING
+static int bc28_netdev_ping(struct netdev *netdev, const char *host,
+        size_t data_len, uint32_t timeout, struct netdev_ping_resp *ping_resp)
+{
+#define BC28_PING_RESP_SIZE       128
+#define BC28_PING_IP_SIZE         16
+#define BC28_PING_TIMEOUT         (10 * RT_TICK_PER_SECOND)
+
+    rt_err_t result = RT_EOK;
+    int response = -1, recv_data_len, ping_time, ttl;
+    char ip_addr[BC28_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 device(%s) failed.", netdev->name);
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(BC28_PING_RESP_SIZE, 4, BC28_PING_TIMEOUT);
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create");
+        return -RT_ENOMEM;
+    }
+
+    /* DNS resolve */
+    struct in_addr inp;
+    if (inet_aton(host, &inp) > 0)
+    {
+        rt_strncpy(ip_addr, host, BC28_PING_IP_SIZE);
+    }
+#ifdef AT_USING_SOCKET
+    else
+    {
+        bc28_domain_resolve(host, ip_addr);
+    }
+#endif
+    
+    if (at_obj_exec_cmd(device->client, resp, "AT+NPING=%s,%d,%d", 
+                        ip_addr, data_len, timeout*1000/RT_TICK_PER_SECOND) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "+NPINGERR:", "+NPINGERR:%d", &response) > 0)
+    {
+        switch (response)
+        {
+        case 1:
+            result = -RT_ETIMEOUT;
+            break;
+        case 2:
+        default:
+            result = -RT_ERROR;
+            break;
+        }
+    }
+    else if (at_resp_parse_line_args_by_kw(resp, "+NPING:", "+NPING:%[^,],%d,%d",
+                                            ip_addr, &ttl, &ping_time) > 0 )
+    {
+        inet_aton(ip_addr, &(ping_resp->ip_addr));
+        ping_resp->data_len = data_len;
+        ping_resp->ticks = rt_tick_from_millisecond(ping_time);
+        ping_resp->ttl = ttl;
+        result = RT_EOK;
+    }
+    else
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+#endif /* NETDEV_USING_PING */
+
+const struct netdev_ops bc28_netdev_ops =
+{
+    bc28_netdev_set_up,
+    bc28_netdev_set_down,
+
+    RT_NULL,
+    bc28_netdev_set_dns_server,
+    RT_NULL,
+
+#ifdef NETDEV_USING_PING
+    bc28_netdev_ping,
+#endif
+    RT_NULL,
+};
+
+static struct netdev *bc28_netdev_add(const char *netdev_name)
+{
+#define ETHERNET_MTU        1500
+#define HWADDR_LEN          8
+    struct netdev *netdev = RT_NULL;
+
+    netdev = (struct netdev *)rt_calloc(1, sizeof(struct netdev));
+    if (netdev == RT_NULL)
+    {
+        LOG_E("no memory for netdev create.");
+        return RT_NULL;
+    }
+
+    netdev->mtu = ETHERNET_MTU;
+    netdev->ops = &bc28_netdev_ops;
+    netdev->hwaddr_len = HWADDR_LEN;
+
+#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;
+}
+
+/* =============================  bc28 device operations ============================= */
+
+/* initialize for bc28 */
+static void bc28_init_thread_entry(void *parameter)
+{
+#define INIT_RETRY                     5
+#define CPIN_RETRY                     5
+#define CSQ_RETRY                      20
+#define CGREG_RETRY                    50
+#define IPADDR_RETRY                   10
+#define AT_DEFAULT_TIMEOUT             5000
+
+    int i;
+    int retry_num = INIT_RETRY;
+    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(AT_DEFAULT_TIMEOUT));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return;
+    }
+
+    LOG_D("start init %s device.", device->name);
+
+    while (retry_num--)
+    {
+        /* reset the bc28 device */
+        bc28_reset(device);
+        rt_thread_mdelay(1000);
+
+        /* wait bc28 startup finish, send AT every 500ms, if receive OK, SYNC success*/
+        if (at_client_obj_wait_connect(client, BC28_WAIT_CONNECT_TIME))
+        {
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        
+        /* disable echo */
+        if (at_obj_exec_cmd(device->client, resp, "ATE0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E("ATE0");
+            goto __exit;
+        }
+
+        /* disable auto register */
+        if (at_obj_exec_cmd(device->client, resp, "AT+QREGSWT=2") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+QREGSWT=2");
+            goto __exit;
+        }
+        
+        /* disable auto connect */
+        if (at_obj_exec_cmd(device->client, resp, "AT+NCONFIG=AUTOCONNECT,FALSE") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+NCONFIG=AUTOCONNECT,FALSE");
+            goto __exit;
+        }
+
+        /* reboot */
+        at_obj_exec_cmd(device->client, resp, "AT+NRB");
+        rt_thread_mdelay(5000);
+
+        while (at_obj_exec_cmd(device->client, resp, "AT") != RT_EOK)
+        {
+            rt_thread_mdelay(1000);
+        }
+
+        /* check IMEI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGSN=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CGSN=1");
+            goto __exit;
+        }
+
+        /* search band 8 */
+        if (at_obj_exec_cmd(device->client, resp, "AT+NBAND=8") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+NBAND=8");
+            goto __exit;
+        }
+
+        /* set max function */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CFUN=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CFUN=1");
+            goto __exit;
+        }
+
+        /* auto report recv from tcp */
+        if (at_obj_exec_cmd(device->client, resp, "AT+NSONMI=2") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+NSONMI=2");
+            goto __exit;
+        }
+
+        /* disable eDRX mode  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CEDRXS=0,5") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CEDRXS=0,5");
+            goto __exit;
+        }
+        
+        /* disable PSM mode  */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CPSMS=0") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CPSMS=0");
+            goto __exit;
+        }
+
+        /* check IMSI */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CIMI") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CIMI");
+            goto __exit;
+        }
+
+        /* attach */
+        if (at_obj_exec_cmd(device->client, resp, "AT+CGATT=1") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+CGATT=1");
+            goto __exit;
+        }
+        
+        /* Get the baudrate */
+        if (at_obj_exec_cmd(device->client, resp, "AT+NATSPEED?") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> AT+NATSPEED?");
+            goto __exit;
+        }
+        at_resp_parse_line_args_by_kw(resp, "+NATSPEED:", "+NATSPEED:%d", &i);
+        LOG_D("%s device baudrate %d", device->name, i);
+        
+        /* get module version */
+        if (at_obj_exec_cmd(device->client, resp, "ATI") != RT_EOK)
+        {
+            result = -RT_ERROR;
+            LOG_E(">> ATI");
+            goto __exit;
+        }
+        for (i = 0; i < (int) resp->line_counts - 1; i++)
+        {
+            LOG_D("%s", at_resp_get_line(resp, i + 1));
+        }
+        
+        /* check SIM card */
+        for (i = 0; i < CPIN_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CPIN?") == RT_EOK)
+            {
+                if (at_resp_get_line_by_kw(resp, "READY") != RT_NULL)
+                    break;
+            }
+        }
+        if (i == CPIN_RETRY)
+        {
+            LOG_E("%s device SIM card detection failed.", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* check signal strength */
+        for (i = 0; i < CSQ_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CSQ") == RT_EOK)
+            {
+                int signal_strength = 0, err_rate = 0;
+                
+                if (at_resp_parse_line_args_by_kw(resp, "+CSQ:", "+CSQ:%d,%d", &signal_strength, &err_rate) > 0)
+                {
+                    if ((signal_strength != 99) && (signal_strength != 0))
+                    {
+                        LOG_D("%s device signal strength: %d, channel bit error rate: %d",
+                                device->name, signal_strength, err_rate);
+                        break;
+                    }
+                }
+            }
+        }
+        if (i == CSQ_RETRY)
+        {
+            LOG_E("%s device signal strength check failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+                
+        /* check the GPRS network is registered */
+        for (i = 0; i < CGREG_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CGATT?") == RT_EOK)
+            {
+                int link_stat = 0;
+                
+                if (at_resp_parse_line_args_by_kw(resp, "+CGATT:", "+CGATT:%d", &link_stat) > 0)
+                {
+                    if (link_stat == 1)
+                    {
+                        LOG_D("%s device GPRS is registered", device->name);
+                        break;
+                    }
+                }
+            }
+        }
+        if (i == CGREG_RETRY)
+        {
+            LOG_E("%s device GPRS is register failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        /* check the GPRS network IP address */
+        for (i = 0; i < IPADDR_RETRY; i++)
+        {
+            rt_thread_mdelay(1000);
+            if (at_obj_exec_cmd(device->client, resp, "AT+CGPADDR") == RT_EOK)
+            {
+                #define IP_ADDR_SIZE_MAX    16
+                char ipaddr[IP_ADDR_SIZE_MAX] = {0};
+                
+                /* parse response data "+CGPADDR: 0,<IP_address>" */
+                if (at_resp_parse_line_args_by_kw(resp, "+CGPADDR:", "+CGPADDR:%*d,%s", ipaddr) > 0)
+                {
+                    LOG_D("%s device IP address: %s", device->name, ipaddr);
+                    break;
+                }
+            }
+        }
+        if (i == IPADDR_RETRY)
+        {
+            LOG_E("%s device GPRS is get IP address failed", device->name);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        /* initialize successfully  */
+        result = RT_EOK;
+        break;
+
+    __exit:
+        if (result != RT_EOK)
+        {
+            /* power off the bc28 device */
+            //bc28_power_off(device);
+            rt_thread_mdelay(1000);
+
+            LOG_I("%s device initialize retry...", device->name);
+        }
+    }
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    if (result == RT_EOK)
+    {
+        /* set network interface device status and address information */
+        bc28_netdev_set_info(device->netdev);
+        /* check and create link staus sync thread  */
+        if (rt_thread_find(device->netdev->name) == RT_NULL)
+        {
+            bc28_netdev_check_link_status(device->netdev);
+        }
+
+        LOG_I("%s device network initialize success.", device->name);
+    }
+    else
+    {
+        LOG_E("%s device network initialize failed(%d).", device->name, result);
+    }
+}
+
+/* bc28 device network initialize */
+static int bc28_net_init(struct at_device *device)
+{
+#ifdef AT_DEVICE_BC28_INIT_ASYN
+    rt_thread_t tid;
+
+    tid = rt_thread_create("bc28_net", bc28_init_thread_entry, (void *)device,
+                           BC28_THREAD_STACK_SIZE, BC28_THREAD_PRIORITY, 20);
+    if (tid)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("create %s device init thread failed.", device->name);
+        return -RT_ERROR;
+    }
+#else
+    bc28_init_thread_entry(device);
+#endif /* AT_DEVICE_BC28_INIT_ASYN */
+
+    return RT_EOK;
+}
+
+static int bc28_init(struct at_device *device)
+{
+    struct at_device_bc28 *bc28 = (struct at_device_bc28 *)device->user_data;
+
+    /* initialize AT client */
+    at_client_init(bc28->client_name, bc28->recv_bufsz);
+
+    device->client = at_client_get(bc28->client_name);
+    if (device->client == RT_NULL)
+    {
+        LOG_E("get AT client(%s) failed.", bc28->client_name);
+        return -RT_ERROR;
+    }
+
+    /* register URC data execution function  */
+#ifdef AT_USING_SOCKET
+    bc28_socket_init(device);
+#endif
+
+    /* add bc28 device to the netdev list */
+    device->netdev = bc28_netdev_add(bc28->device_name);
+    if (device->netdev == RT_NULL)
+    {
+        LOG_E("add netdev(%s) failed.", bc28->device_name);
+        return -RT_ERROR;
+    }
+
+    /* initialize bc28 pin configuration */
+    if (bc28->power_pin != -1)
+    {
+        rt_pin_mode(bc28->power_pin, PIN_MODE_OUTPUT);
+        rt_pin_write(bc28->power_pin, PIN_LOW);
+    }
+
+    /* initialize bc28 device network */
+    return bc28_netdev_set_up(device->netdev);
+}
+
+static int bc28_deinit(struct at_device *device)
+{
+    RT_ASSERT(device);
+    
+    return bc28_netdev_set_down(device->netdev);
+}
+
+static int bc28_control(struct at_device *device, int cmd, void *arg)
+{
+    int result = -RT_ERROR;
+
+    RT_ASSERT(device);
+
+    switch (cmd)
+    {
+    case AT_DEVICE_CTRL_RESET:
+        result = bc28_reset(device);
+        break;
+    case AT_DEVICE_CTRL_SLEEP:
+    case AT_DEVICE_CTRL_WAKEUP:
+    case AT_DEVICE_CTRL_POWER_ON:
+    case AT_DEVICE_CTRL_POWER_OFF:
+    case AT_DEVICE_CTRL_LOW_POWER:
+    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("not support the control command(%d).", cmd);
+        break;
+    default:
+        LOG_E("input error control command(%d).", cmd);
+        break;
+    }
+
+    return result;
+}
+
+const struct at_device_ops bc28_device_ops =
+{
+    bc28_init,
+    bc28_deinit,
+    bc28_control,
+};
+
+static int bc28_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 device class create.");
+        return -RT_ENOMEM;
+    }
+
+    /* fill bc28 device class object */
+#ifdef AT_USING_SOCKET
+    bc28_socket_class_register(class);
+#endif
+    class->device_ops = &bc28_device_ops;
+
+    return at_device_class_register(class, AT_DEVICE_CLASS_BC28);
+}
+INIT_DEVICE_EXPORT(bc28_device_class_register);
+
+#endif /* AT_DEVICE_USING_BC28 */

class/bc28/at_device_bc28.h

@@ -0,0 +1,70 @@
+ /*
+ * File      : at_device_bc28.h
+ * This file is part of RT-Thread RTOS
+ * Copyright (c) 2020, RudyLo <luhuadong@163.com>
+ *
+ *  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
+ * 2020-02-12     luhuadong         first version
+ */
+
+#ifndef __AT_DEVICE_BC28_H__
+#define __AT_DEVICE_BC28_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdlib.h>
+
+#include <at_device.h>
+
+/* The maximum number of sockets supported by the BC28 device */
+#define AT_DEVICE_BC28_SOCKETS_NUM  7
+
+struct at_device_bc28
+{
+    char *device_name;
+    char *client_name;
+
+    int power_pin;          /* BC28 has not power_en, it should be reset pin */
+    int power_status_pin;   /* ADC */
+    size_t recv_bufsz;
+    struct at_device device;
+
+    void *socket_data;
+    void *user_data;
+
+    rt_bool_t power_status;
+    rt_bool_t sleep_status;
+};
+
+#ifdef AT_USING_SOCKET
+
+/* bc28 device socket initialize */
+int bc28_socket_init(struct at_device *device);
+
+/* bc28 device class socket register */
+int bc28_socket_class_register(struct at_device_class *class);
+
+#endif /* AT_USING_SOCKET */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __AT_DEVICE_BC28_H__ */

class/bc28/at_socket_bc28.c

@@ -0,0 +1,773 @@
+/*
+ * File      : at_socket_bc28.c
+ * This file is part of RT-Thread RTOS
+ * Copyright (c) 2020, RudyLo <luhuadong@163.com>
+ *
+ *  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
+ * 2020-02-13     luhuadong         first version
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <at_device_bc28.h>
+
+#define LOG_TAG                        "at.skt.bc28"
+#include <at_log.h>
+
+#if defined(AT_DEVICE_USING_BC28) && defined(AT_USING_SOCKET)
+
+#define BC28_MODULE_SEND_MAX_SIZE       1024
+
+/* set real event by current socket and current state */
+#define SET_EVENT(socket, event)       (((socket + 1) << 16) | (event))
+
+/* AT socket event type */
+#define BC28_EVENT_CONN_OK             (1L << 0)
+#define BC28_EVENT_SEND_OK             (1L << 1)
+#define BC28_EVENT_RECV_OK             (1L << 2)
+#define BC28_EVNET_CLOSE_OK            (1L << 3)
+#define BC28_EVENT_CONN_FAIL           (1L << 4)
+#define BC28_EVENT_SEND_FAIL           (1L << 5)
+#define BC28_EVENT_DOMAIN_OK           (1L << 6)
+
+static at_evt_cb_t at_evt_cb_set[] = {
+        [AT_SOCKET_EVT_RECV] = NULL,
+        [AT_SOCKET_EVT_CLOSED] = NULL,
+};
+
+static void at_tcp_ip_errcode_parse(int result)//TCP/IP_QIGETERROR
+{
+    switch(result)
+    {
+    case 0   : LOG_D("%d : Operation successful",         result); break;
+    case 550 : LOG_E("%d : Unknown error",                result); break;
+    case 551 : LOG_E("%d : Operation blocked",            result); break;
+    case 552 : LOG_E("%d : Invalid parameters",           result); break;
+    case 553 : LOG_E("%d : Memory not enough",            result); break;
+    case 554 : LOG_E("%d : Create socket failed",         result); break;
+    case 555 : LOG_E("%d : Operation not supported",      result); break;
+    case 556 : LOG_E("%d : Socket bind failed",           result); break;
+    case 557 : LOG_E("%d : Socket listen failed",         result); break;
+    case 558 : LOG_E("%d : Socket write failed",          result); break;
+    case 559 : LOG_E("%d : Socket read failed",           result); break;
+    case 560 : LOG_E("%d : Socket accept failed",         result); break;
+    case 561 : LOG_E("%d : Open PDP context failed",      result); break;
+    case 562 : LOG_E("%d : Close PDP context failed",     result); break;
+    case 563 : LOG_W("%d : Socket identity has been used", result); break;
+    case 564 : LOG_E("%d : DNS busy",                     result); break;
+    case 565 : LOG_E("%d : DNS parse failed",             result); break;
+    case 566 : LOG_E("%d : Socket connect failed",        result); break;
+    // case 567 : LOG_W("%d : Socket has been closed",       result); break;
+    case 567 : break;
+    case 568 : LOG_E("%d : Operation busy",               result); break;
+    case 569 : LOG_E("%d : Operation timeout",            result); break;
+    case 570 : LOG_E("%d : PDP context broken down",      result); break;
+    case 571 : LOG_E("%d : Cancel send",                  result); break;
+    case 572 : LOG_E("%d : Operation not allowed",        result); break;
+    case 573 : LOG_E("%d : APN not configured",           result); break;
+    case 574 : LOG_E("%d : Port busy",                    result); break;
+    default  : LOG_E("%d : Unknown err code",             result); break;
+    }
+}
+
+
+static int bc28_socket_event_send(struct at_device *device, uint32_t event)
+{
+    return (int) rt_event_send(device->socket_event, event);
+}
+
+static int bc28_socket_event_recv(struct at_device *device, uint32_t event, uint32_t timeout, rt_uint8_t option)
+{
+    int result = RT_EOK;
+    rt_uint32_t recved;
+
+    result = rt_event_recv(device->socket_event, event, option | RT_EVENT_FLAG_CLEAR, timeout, &recved);
+    if (result != RT_EOK)
+    {
+        return -RT_ETIMEOUT;
+    }
+
+    return recved;
+}
+
+/**
+ * close socket by AT commands.
+ *
+ * @param current socket
+ *
+ * @return  0: close socket success
+ *         -1: send AT commands error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+static int bc28_socket_close(struct at_socket *socket)
+{
+    int result = RT_EOK;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+
+    resp = at_create_resp(64, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+    
+    result = at_obj_exec_cmd(device->client, resp, "AT+NSOCL=%d", device_socket);
+
+    at_delete_resp(resp);
+
+    return result;
+}
+
+/**
+ * create TCP/UDP client or server connect by AT commands.
+ *
+ * @param socket current socket
+ * @param ip server or client IP address
+ * @param port server or client port
+ * @param type connect socket type(tcp, udp)
+ * @param is_client connection is client
+ *
+ * @return   0: connect success
+ *          -1: connect failed, send commands error or type error
+ *          -2: wait socket event timeout
+ *          -5: no memory
+ */
+static int bc28_socket_connect(struct at_socket *socket, char *ip, int32_t port,
+    enum at_socket_type type, rt_bool_t is_client)
+{
+#define CONN_RETRY  2
+
+    int i = 0;
+    const char *type_str = RT_NULL;
+    uint32_t event = 0;
+    at_response_t resp = RT_NULL;
+    int result = 0, event_result = 0;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+
+    RT_ASSERT(ip);
+    RT_ASSERT(port >= 0);
+
+    if ( ! is_client)
+    {
+        return -RT_ERROR;
+    }
+
+    if (type != AT_SOCKET_TCP)
+    {
+        return -RT_ERROR;
+    }
+
+    resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    for(i=0; i<CONN_RETRY; i++)
+    {
+        /* clear socket connect event */
+        event = SET_EVENT(device_socket, BC28_EVENT_CONN_OK | BC28_EVENT_CONN_FAIL);
+        bc28_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+        if (at_obj_exec_cmd(device->client, resp, "AT+NSOCO=%d,%s,%d", 
+                            device_socket, ip, port) < 0)
+        {
+            result = -RT_ERROR;
+            break;
+        }
+
+        /* waiting result event from AT URC, the device default connection timeout is 60 seconds*/
+        if (bc28_socket_event_recv(device, SET_EVENT(device_socket, 0), 
+                                    60 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+        {
+            LOG_E("%s device socket(%d) wait connect result timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            break;
+        }
+        /* waiting OK or failed result */
+        event_result = bc28_socket_event_recv(device, BC28_EVENT_CONN_OK | BC28_EVENT_CONN_FAIL, 
+                                                1 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("%s device socket(%d) wait connect OK|FAIL timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            break;
+        }
+        /* check result */
+        if (event_result & BC28_EVENT_CONN_OK)
+        {
+            result = RT_EOK;
+            break;
+        }
+        
+        LOG_D("%s device socket(%d) connect failed, the socket was not be closed and now will connect retry.",
+                    device->name, device_socket);
+        if (bc28_socket_close(socket) < 0)
+        {
+            result = -RT_ERROR;
+            break;
+        }
+    }
+
+    if (i == CONN_RETRY)
+    {
+        LOG_E("%s device socket(%d) connect failed.", device->name, device_socket);
+        result = -RT_ERROR;
+    }
+    
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int at_get_send_size(struct at_socket *socket, size_t *size, size_t *acked, size_t *nacked)
+{
+    int result = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+
+    resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.", device->name);
+        return -RT_ENOMEM;
+    }
+
+    if (at_obj_exec_cmd(device->client, resp, "AT+QISEND=%d,0", device_socket) < 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    if (at_resp_parse_line_args_by_kw(resp, "+QISEND:", "+QISEND: %d,%d,%d", size, acked, nacked) <= 0)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+__exit:
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+}
+
+static int at_wait_send_finish(struct at_socket *socket, size_t settings_size)
+{
+    /* get the timeout by the input data size */
+    rt_tick_t timeout = rt_tick_from_millisecond(settings_size);
+    rt_tick_t last_time = rt_tick_get();
+    size_t size = 0, acked = 0, nacked = 0xFFFF;
+
+    while (rt_tick_get() - last_time <= timeout)
+    {
+        at_get_send_size(socket, &size, &acked, &nacked);
+        if (nacked == 0)
+        {
+            return RT_EOK;
+        }
+        rt_thread_mdelay(100);
+    }
+
+    return -RT_ETIMEOUT;
+}
+
+/**
+ * send data to server or client by AT commands.
+ *
+ * @param socket current socket
+ * @param buff send buffer
+ * @param bfsz send buffer size
+ * @param type connect socket type(tcp, udp)
+ *
+ * @return >=0: the size of send success
+ *          -1: send AT commands error or send data error
+ *          -2: waited socket event timeout
+ *          -5: no memory
+ */
+static int bc28_socket_send(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type)
+{
+    uint32_t event = 0;
+    int result = 0, event_result = 0;
+    size_t cur_pkt_size = 0, sent_size = 0;
+    at_response_t resp = RT_NULL;
+    int device_socket = (int) socket->user_data;
+    struct at_device *device = (struct at_device *) socket->device;
+    struct at_device_bc28 *bc28 = (struct at_device_bc28 *) device->user_data;
+    rt_mutex_t lock = device->client->lock;
+
+    RT_ASSERT(buff);
+
+    resp = at_create_resp(128, 2, rt_tick_from_millisecond(300));
+    if (resp == RT_NULL)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    rt_mutex_take(lock, RT_WAITING_FOREVER);
+
+    /* set current socket for send URC event */
+    bc28->user_data = (void *) device_socket;
+
+    /* clear socket send event */
+    event = SET_EVENT(device_socket, BC28_EVENT_SEND_OK | BC28_EVENT_SEND_FAIL);
+    bc28_socket_event_recv(device, event, 0, RT_EVENT_FLAG_OR);
+
+    /* set AT client end sign to deal with '>' sign.*/
+    at_obj_set_end_sign(device->client, '>');
+
+    while (sent_size < bfsz)
+    {
+        if (bfsz - sent_size < BC28_MODULE_SEND_MAX_SIZE)
+        {
+            cur_pkt_size = bfsz - sent_size;
+        }
+        else
+        {
+            cur_pkt_size = BC28_MODULE_SEND_MAX_SIZE;
+        }
+
+        /* send the "AT+QISEND" commands to AT server than receive the '>' response on the first line. */
+        if (at_obj_exec_cmd(device->client, resp, "AT+QISEND=%d,%d", device_socket, (int)cur_pkt_size) < 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+        
+        rt_thread_mdelay(5);//delay at least 4ms
+        
+        /* send the real data to server or client */
+        result = (int) at_client_obj_send(device->client, buff + sent_size, cur_pkt_size);
+        if (result == 0)
+        {
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        /* waiting result event from AT URC */
+        event = SET_EVENT(device_socket, 0);
+        event_result = bc28_socket_event_recv(device, event, 10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("%s device socket(%d) wait event timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* waiting OK or failed result */
+        event = BC28_EVENT_SEND_OK | BC28_EVENT_SEND_FAIL;
+        event_result = bc28_socket_event_recv(device, event, 1 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR);
+        if (event_result < 0)
+        {
+            LOG_E("%s device socket(%d) wait sned OK|FAIL timeout.", device->name, device_socket);
+            result = -RT_ETIMEOUT;
+            goto __exit;
+        }
+        /* check result */
+        if (event_result & BC28_EVENT_SEND_FAIL)
+        {
+            LOG_E("%s device socket(%d) send failed.", device->name, device_socket);
+            result = -RT_ERROR;
+            goto __exit;
+        }
+
+        if (type == AT_SOCKET_TCP)
+        {
+            at_wait_send_finish(socket, 2*cur_pkt_size);
+        }
+
+        sent_size += cur_pkt_size;
+    }
+
+__exit:
+    /* reset the end sign for data conflict */
+    at_obj_set_end_sign(device->client, 0);
+
+    rt_mutex_release(lock);
+
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result > 0 ? sent_size : result;
+}
+
+/**
+ * domain resolve by AT commands.
+ *
+ * @param name domain name
+ * @param ip parsed IP address, it's length must be 16
+ *
+ * @return  0: domain resolve success
+ *         -1: send AT commands error or response error
+ *         -2: wait socket event timeout
+ *         -5: no memory
+ */
+int bc28_domain_resolve(const char *name, char ip[16])
+{
+    #define RESOLVE_RETRY  3
+
+    int i, result;
+    at_response_t resp = RT_NULL;
+    struct at_device *device = RT_NULL;
+    struct at_device_bc28 *bc28 = RT_NULL;
+
+    RT_ASSERT(name);
+    RT_ASSERT(ip);
+
+    device = at_device_get_first_initialized();
+    if (device == RT_NULL)
+    {
+        LOG_E("get first init device failed.");
+        return -RT_ERROR;
+    }
+
+    /* the maximum response time is 60 seconds, but it set to 10 seconds is convenient to use. */
+    resp = at_create_resp(128, 0, rt_tick_from_millisecond(300));
+    if (!resp)
+    {
+        LOG_E("no memory for resp create.");
+        return -RT_ENOMEM;
+    }
+
+    /* clear BC28_EVENT_DOMAIN_OK */
+    bc28_socket_event_recv(device, BC28_EVENT_DOMAIN_OK, 0, RT_EVENT_FLAG_OR);
+    
+    bc28 = (struct at_device_bc28 *) device->user_data;
+    bc28->socket_data = ip;
+
+    if (at_obj_exec_cmd(device->client, resp, "AT+QDNS=0,%s", name) != RT_EOK)
+    {
+        result = -RT_ERROR;
+        goto __exit;
+    }
+
+    for(i = 0; i < RESOLVE_RETRY; i++)
+    {
+        /* waiting result event from AT URC, the device default connection timeout is 30 seconds.*/
+        if (bc28_socket_event_recv(device, BC28_EVENT_DOMAIN_OK, 10 * RT_TICK_PER_SECOND, RT_EVENT_FLAG_OR) < 0)
+        {
+            result = -RT_ETIMEOUT;
+            continue;
+        }
+        else
+        {
+            if (rt_strlen(ip) < 8)
+            {
+                rt_thread_mdelay(100);
+                /* resolve failed, maybe receive an URC CRLF */
+                result = -RT_ERROR;
+                continue;
+            }
+            else
+            {
+                result = RT_EOK;
+                break;
+            }
+        }
+    }
+
+ __exit:
+    bc28->socket_data = RT_NULL;
+    if (resp)
+    {
+        at_delete_resp(resp);
+    }
+
+    return result;
+
+}
+
+/**
+ * set AT socket event notice callback
+ *
+ * @param event notice event
+ * @param cb notice callback
+ */
+static void bc28_socket_set_event_cb(at_socket_evt_t event, at_evt_cb_t cb)
+{
+    if (event < sizeof(at_evt_cb_set) / sizeof(at_evt_cb_set[1]))
+    {
+        at_evt_cb_set[event] = cb;
+    }
+}
+
+static void urc_connect_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0, result = 0;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    sscanf(data, "+QIOPEN: %d,%d", &device_socket , &result);
+
+    if (result == 0)
+    {
+        bc28_socket_event_send(device, SET_EVENT(device_socket, BC28_EVENT_CONN_OK));
+    }
+    else
+    {
+        at_tcp_ip_errcode_parse(result);
+        bc28_socket_event_send(device, SET_EVENT(device_socket, BC28_EVENT_CONN_FAIL));
+    }
+}
+
+static void urc_send_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_device *device = RT_NULL;
+    struct at_device_bc28 *bc28 = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+    
+    bc28 = (struct at_device_bc28 *) device->user_data;
+    device_socket = (int) bc28->user_data;
+
+    if (rt_strstr(data, "SEND OK"))
+    {
+        bc28_socket_event_send(device, SET_EVENT(device_socket, BC28_EVENT_SEND_OK));
+    }
+    else if (rt_strstr(data, "SEND FAIL"))
+    {
+        bc28_socket_event_send(device, SET_EVENT(device_socket, BC28_EVENT_SEND_FAIL));
+    }
+}
+
+static void urc_close_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    sscanf(data, "+QIURC: \"closed\",%d", &device_socket);
+    /* get at socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the socket is disconnect by remote */
+    if (at_evt_cb_set[AT_SOCKET_EVT_CLOSED])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_CLOSED](socket, AT_SOCKET_EVT_CLOSED, NULL, 0);
+    }
+}
+
+static void urc_recv_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int device_socket = 0;
+    rt_int32_t timeout;
+    rt_size_t bfsz = 0, temp_size = 0;
+    char *recv_buf = RT_NULL, temp[8] = {0};
+    struct at_socket *socket = RT_NULL;
+    struct at_device *device = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+
+    /* get the current socket and receive buffer size by receive data */
+    sscanf(data, "+QIURC: \"recv\",%d,%d", &device_socket, (int *) &bfsz);
+    /* set receive timeout by receive buffer length, not less than 10 ms */
+    timeout = bfsz > 10 ? bfsz : 10;
+
+    if (device_socket < 0 || bfsz == 0)
+    {
+        return;
+    }
+
+    recv_buf = (char *) rt_calloc(1, bfsz);
+    if (recv_buf == RT_NULL)
+    {
+        LOG_E("no memory for URC receive buffer(%d).", bfsz);
+        /* read and clean the coming data */
+        while (temp_size < bfsz)
+        {
+            if (bfsz - temp_size > sizeof(temp))
+            {
+                at_client_obj_recv(client, temp, sizeof(temp), timeout);
+            }
+            else
+            {
+                at_client_obj_recv(client, temp, bfsz - temp_size, timeout);
+            }
+            temp_size += sizeof(temp);
+        }
+        return;
+    }
+
+    /* sync receive data */
+    if (at_client_obj_recv(client, recv_buf, bfsz, timeout) != bfsz)
+    {
+        LOG_E("%s device receive size(%d) data failed.", device->name, bfsz);
+        rt_free(recv_buf);
+        return;
+    }
+
+    /* get at socket object by device socket descriptor */
+    socket = &(device->sockets[device_socket]);
+
+    /* notice the receive buffer and buffer size */
+    if (at_evt_cb_set[AT_SOCKET_EVT_RECV])
+    {
+        at_evt_cb_set[AT_SOCKET_EVT_RECV](socket, AT_SOCKET_EVT_RECV, recv_buf, bfsz);
+    }
+}
+
+static void urc_dnsqip_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    int i = 0, j = 0;
+    char recv_ip[16] = {0};
+    int result, ip_count, dns_ttl;
+    struct at_device *device = RT_NULL;
+    struct at_device_bc28 *bc28 = RT_NULL;
+    char *client_name = client->device->parent.name;
+
+    RT_ASSERT(data && size);
+
+    device = at_device_get_by_name(AT_DEVICE_NAMETYPE_CLIENT, client_name);
+    if (device == RT_NULL)
+    {
+        LOG_E("get device(%s) failed.", client_name);
+        return;
+    }
+    
+    bc28 = (struct at_device_bc28 *) device->user_data;
+    if (bc28->socket_data == RT_NULL)
+    {
+        LOG_D("%s device socket_data no config.", bc28->device_name);
+        return;
+    }
+
+    sscanf(data, "+QDNS:%s", recv_ip);
+    recv_ip[15] = '\0';
+
+    rt_memcpy(bc28->socket_data, recv_ip, sizeof(recv_ip));
+
+    bc28_socket_event_send(device, BC28_EVENT_DOMAIN_OK);
+}
+
+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);
+}
+
+static void urc_dns_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    RT_ASSERT(data && size);
+
+    urc_dnsqip_func(client, data, size);
+}
+
+static void urc_qiurc_func(struct at_client *client, const char *data, rt_size_t size)
+{
+    RT_ASSERT(data && size);
+
+    switch(*(data + 9))
+    {
+    case 'c' : urc_close_func(client, data, size); break;//+QIURC: "closed"
+    case 'r' : urc_recv_func(client, data, size); break;//+QIURC: "recv"
+    case 'd' : urc_dnsqip_func(client, data, size); break;//+QIURC: "dnsgip"
+    default  : urc_func(client, data, size);      break;
+    }
+}
+
+static const struct at_urc urc_table[] =
+{
+    {"SEND OK",     "\r\n",                 urc_send_func},
+    {"SEND FAIL",   "\r\n",                 urc_send_func},
+    {"+QIOPEN:",    "\r\n",                 urc_connect_func},
+    {"+QIURC:",     "\r\n",                 urc_qiurc_func},
+    {"+QDNS:",      "\r\n",                 urc_dns_func},
+};
+
+static const struct at_socket_ops bc28_socket_ops =
+{
+    bc28_socket_connect,
+    bc28_socket_close,
+    bc28_socket_send,
+    bc28_domain_resolve,
+    bc28_socket_set_event_cb,
+};
+
+int bc28_socket_init(struct at_device *device)
+{
+    RT_ASSERT(device);
+
+    /* register URC data execution function  */
+    at_obj_set_urc_table(device->client, urc_table, sizeof(urc_table) / sizeof(urc_table[0]));
+
+    return RT_EOK;
+}
+
+int bc28_socket_class_register(struct at_device_class *class)
+{
+    RT_ASSERT(class);
+
+    class->socket_num = AT_DEVICE_BC28_SOCKETS_NUM;
+    class->socket_ops = &bc28_socket_ops;
+
+    return RT_EOK;
+}
+
+#endif /* AT_DEVICE_USING_BC28 && AT_USING_SOCKET */
+

inc/at_device.h

@@ -58,6 +58,7 @@ extern "C" {
 #define AT_DEVICE_CLASS_AIR720         0x0CU
 #define AT_DEVICE_CLASS_ME3616         0x0DU
 #define AT_DEVICE_CLASS_M6315          0x0EU
+#define AT_DEVICE_CLASS_BC28           0x0FU
 
 /* Options and Commands for AT device control opreations */
 #define AT_DEVICE_CTRL_POWER_ON        0x01L

samples/at_sample_bc28.c

@@ -0,0 +1,53 @@
+/*
+ * File      : at_sample_bc28.c
+ * This file is part of RT-Thread RTOS
+ * Copyright (c) 2020, RudyLo <luhuadong@163.com>
+ *
+ *  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
+ * 2020-02-13     luhuadong         first version
+ */
+
+#include <at_device_bc28.h>
+
+#define LOG_TAG                        "at.sample.bc28"
+#include <at_log.h>
+
+#define BC28_SAMPLE_DEIVCE_NAME        "bc28"
+
+static struct at_device_bc28 _dev =
+{
+    BC28_SAMPLE_DEIVCE_NAME,
+    BC28_SAMPLE_CLIENT_NAME,
+
+    BC28_SAMPLE_POWER_PIN,
+    BC28_SAMPLE_STATUS_PIN,
+    BC28_SAMPLE_RECV_BUFF_LEN,
+};
+
+static int bc28_device_register(void)
+{
+    struct at_device_bc28 *bc28 = &_dev;
+
+    return at_device_register(&(bc28->device),
+                              bc28->device_name,
+                              bc28->client_name,
+                              AT_DEVICE_CLASS_BC28,
+                              (void *) bc28);
+}
+INIT_APP_EXPORT(bc28_device_register);
+