[at]优化at格式化输出，避免多个at client和server输出冲突

components/net/at/Kconfig

@@ -22,6 +22,10 @@ if RT_USING_AT
             int "The maximum length of server data accepted"
             default 256
 
+        config AT_SERVER_SEND_BUFF_LEN
+            int "The maximum length of server commands buffer"
+            default 256
+
         choice
             prompt "The commands new line sign"
             help
@@ -81,10 +85,6 @@ if RT_USING_AT
             bool "Enable print RAW format AT command communication data"
             default n
 
-        config AT_CMD_MAX_LEN
-            int "The maximum length of AT Commands buffer"
-            default 128
-
     endif
 
     config AT_SW_VERSION_NUM

components/net/at/include/at.h

@@ -100,6 +100,7 @@ struct at_server
     rt_err_t (*get_char)(struct at_server *server, char *ch, rt_int32_t timeout);
     rt_bool_t echo_mode;
 
+    char send_buffer[AT_SERVER_SEND_BUFF_LEN];
     char recv_buffer[AT_SERVER_RECV_BUFF_LEN];
     rt_size_t cur_recv_len;
     rt_sem_t rx_notice;
@@ -166,6 +167,12 @@ struct at_client
     at_status_t status;
     char end_sign;
 
+    char *send_buf;
+    /* The maximum supported send cmd length */
+    rt_size_t send_bufsz;
+    /* The length of last cmd */
+    rt_size_t last_cmd_len;
+
     /* the current received one line data buffer */
     char *recv_line_buf;
     /* The length of the currently received one line data */
@@ -181,6 +188,7 @@ struct at_client
 
     struct at_urc_table *urc_table;
     rt_size_t urc_table_size;
+    const struct at_urc *urc;
 
     rt_thread_t parser;
 };
@@ -205,7 +213,7 @@ int at_req_parse_args(const char *req_args, const char *req_expr, ...);
 #ifdef AT_USING_CLIENT
 
 /* AT client initialize and start*/
-int at_client_init(const char *dev_name,  rt_size_t recv_bufsz);
+int at_client_init(const char *dev_name, rt_size_t recv_bufsz, rt_size_t send_bufsz);
 
 /* ========================== multiple AT client function ============================ */
 

components/net/at/src/at_client.c

@@ -33,9 +33,8 @@ extern rt_size_t at_utils_send(rt_device_t dev,
                                rt_off_t    pos,
                                const void *buffer,
                                rt_size_t   size);
-extern rt_size_t at_vprintfln(rt_device_t device, const char *format, va_list args);
+extern rt_size_t at_vprintfln(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args);
 extern void at_print_raw_cmd(const char *type, const char *cmd, rt_size_t size);
-extern const char *at_get_last_cmd(rt_size_t *cmd_size);
 
 /**
  * Create response object.
@@ -289,9 +288,7 @@ int at_resp_parse_line_args_by_kw(at_response_t resp, const char *keyword, const
 int at_obj_exec_cmd(at_client_t client, at_response_t resp, const char *cmd_expr, ...)
 {
     va_list args;
-    rt_size_t cmd_size = 0;
     rt_err_t result = RT_EOK;
-    const char *cmd = RT_NULL;
 
     RT_ASSERT(cmd_expr);
 
@@ -321,23 +318,25 @@ int at_obj_exec_cmd(at_client_t client, at_response_t resp, const char *cmd_expr
     rt_sem_control(client->resp_notice, RT_IPC_CMD_RESET, RT_NULL);
 
     va_start(args, cmd_expr);
-    at_vprintfln(client->device, cmd_expr, args);
+    client->last_cmd_len = at_vprintfln(client->device, client->send_buf, client->send_bufsz, cmd_expr, args);
+    if (client->last_cmd_len > 2)
+    {
+        client->last_cmd_len -= 2; /* "\r\n" */
+    }
     va_end(args);
 
     if (resp != RT_NULL)
     {
         if (rt_sem_take(client->resp_notice, resp->timeout) != RT_EOK)
         {
-            cmd = at_get_last_cmd(&cmd_size);
-            LOG_W("execute command (%.*s) timeout (%d ticks)!", cmd_size, cmd, resp->timeout);
+            LOG_W("execute command (%.*s) timeout (%d ticks)!", client->last_cmd_len, client->send_buf, resp->timeout);
             client->resp_status = AT_RESP_TIMEOUT;
             result = -RT_ETIMEOUT;
             goto __exit;
         }
         if (client->resp_status != AT_RESP_OK)
         {
-            cmd = at_get_last_cmd(&cmd_size);
-            LOG_E("execute command (%.*s) failed!", cmd_size, cmd);
+            LOG_E("execute command (%.*s) failed!", client->last_cmd_len, client->send_buf);
             result = -RT_ERROR;
             goto __exit;
         }
@@ -700,7 +699,7 @@ static int at_recv_readline(at_client_t client)
 
         /* is newline or URC data */
         if ((ch == '\n' && last_ch == '\r') || (client->end_sign != 0 && ch == client->end_sign)
-                || get_urc_obj(client))
+                || (client->urc = get_urc_obj(client)) != RT_NULL)
         {
             if (is_full)
             {
@@ -723,19 +722,18 @@ static int at_recv_readline(at_client_t client)
 
 static void client_parser(at_client_t client)
 {
-    const struct at_urc *urc;
-
     while(1)
     {
         if (at_recv_readline(client) > 0)
         {
-            if ((urc = get_urc_obj(client)) != RT_NULL)
+            if (client->urc != RT_NULL)
             {
                 /* current receive is request, try to execute related operations */
-                if (urc->func != RT_NULL)
+                if (client->urc->func != RT_NULL)
                 {
-                    urc->func(client, client->recv_line_buf, client->recv_line_len);
+                    client->urc->func(client, client->recv_line_buf, client->recv_line_len);
                 }
+                client->urc = RT_NULL;
             }
             else if (client->resp != RT_NULL)
             {
@@ -835,6 +833,15 @@ static int at_client_para_init(at_client_t client)
         goto __exit;
     }
 
+    client->last_cmd_len = 0;
+    client->send_buf = (char *) rt_calloc(1, client->send_bufsz);
+    if (client->send_buf == RT_NULL)
+    {
+        LOG_E("AT client initialize failed! No memory for send buffer.");
+        result = -RT_ENOMEM;
+        goto __exit;
+    }
+
     rt_snprintf(name, RT_NAME_MAX, "%s%d", AT_CLIENT_LOCK_NAME, at_client_num);
     client->lock = rt_mutex_create(name, RT_IPC_FLAG_PRIO);
     if (client->lock == RT_NULL)
@@ -926,7 +933,7 @@ __exit:
  *        -1 : initialize failed
  *        -5 : no memory
  */
-int at_client_init(const char *dev_name,  rt_size_t recv_bufsz)
+int at_client_init(const char *dev_name, rt_size_t recv_bufsz, rt_size_t send_bufsz)
 {
     int idx = 0;
     int result = RT_EOK;
@@ -935,6 +942,7 @@ int at_client_init(const char *dev_name,  rt_size_t recv_bufsz)
 
     RT_ASSERT(dev_name);
     RT_ASSERT(recv_bufsz > 0);
+    RT_ASSERT(send_bufsz > 0);
 
     if (at_client_get(dev_name) != RT_NULL)
     {
@@ -952,6 +960,7 @@ int at_client_init(const char *dev_name,  rt_size_t recv_bufsz)
 
     client = &at_client_table[idx];
     client->recv_bufsz = recv_bufsz;
+    client->send_bufsz = send_bufsz;
 
     result = at_client_para_init(client);
     if (result != RT_EOK)

components/net/at/src/at_server.c

@@ -43,8 +43,8 @@ extern rt_size_t at_utils_send(rt_device_t dev,
                                rt_off_t    pos,
                                const void *buffer,
                                rt_size_t   size);
-extern void at_vprintf(rt_device_t device, const char *format, va_list args);
-extern void at_vprintfln(rt_device_t device, const char *format, va_list args);
+extern void at_vprintf(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args);
+extern void at_vprintfln(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args);
 
 /**
  * AT server send data to AT device
@@ -57,7 +57,7 @@ void at_server_printf(const char *format, ...)
 
     va_start(args, format);
 
-    at_vprintf(at_server_local->device, format, args);
+    at_vprintf(at_server_local->device, at_server_local->send_buffer, sizeof(at_server_local->send_buffer), format, args);
 
     va_end(args);
 }
@@ -73,7 +73,7 @@ void at_server_printfln(const char *format, ...)
 
     va_start(args, format);
 
-    at_vprintfln(at_server_local->device, format, args);
+    at_vprintfln(at_server_local->device, at_server_local->send_buffer, sizeof(at_server_local->send_buffer), format, args);
 
     va_end(args);
 }

components/net/at/src/at_utils.c

@@ -13,9 +13,6 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-static char send_buf[AT_CMD_MAX_LEN];
-static rt_size_t last_cmd_len = 0;
-
 /**
  * dump hex format data to console device
  *
@@ -60,12 +57,6 @@ void at_print_raw_cmd(const char *name, const char *buf, rt_size_t size)
     }
 }
 
-const char *at_get_last_cmd(rt_size_t *cmd_size)
-{
-    *cmd_size = last_cmd_len;
-    return send_buf;
-}
-
 rt_weak rt_size_t at_utils_send(rt_device_t dev,
                                 rt_off_t    pos,
                                 const void *buffer,
@@ -74,37 +65,31 @@ rt_weak rt_size_t at_utils_send(rt_device_t dev,
     return rt_device_write(dev, pos, buffer, size);
 }
 
-rt_size_t at_vprintf(rt_device_t device, const char *format, va_list args)
+rt_size_t at_vprintf(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args)
 {
-    last_cmd_len = vsnprintf(send_buf, sizeof(send_buf), format, args);
-    if(last_cmd_len > sizeof(send_buf))
-        last_cmd_len = sizeof(send_buf);
+    rt_size_t len = vsnprintf(send_buf, buf_size, format, args);
+    if (len == 0)
+    {
+        return 0;
+    }
 
 #ifdef AT_PRINT_RAW_CMD
-    at_print_raw_cmd("sendline", send_buf, last_cmd_len);
+    at_print_raw_cmd("sendline", send_buf, len);
 #endif
 
-    return at_utils_send(device, 0, send_buf, last_cmd_len);
+    return at_utils_send(device, 0, send_buf, len);
 }
 
-rt_size_t at_vprintfln(rt_device_t device, const char *format, va_list args)
+rt_size_t at_vprintfln(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args)
 {
-    rt_size_t len;
-
-    last_cmd_len = vsnprintf(send_buf, sizeof(send_buf) - 2, format, args);
-
-    if(last_cmd_len == 0)
+    rt_size_t len = vsnprintf(send_buf, buf_size - 2, format, args);
+    if (len == 0)
     {
         return 0;
     }
 
-    if(last_cmd_len > sizeof(send_buf) - 2)
-    {
-        last_cmd_len = sizeof(send_buf) - 2;
-    }
-    rt_memcpy(send_buf + last_cmd_len, "\r\n", 2);
-
-    len = last_cmd_len + 2;
+    send_buf[len++] = '\r';
+    send_buf[len++] = '\n';
 
 #ifdef AT_PRINT_RAW_CMD
     at_print_raw_cmd("sendline", send_buf, len);