at指令下发可解析有返回值，at指令处理数据相关参考赵老师的modbus写的。

usersrc/atcmd.c

@@ -1,4 +1,16 @@
 #include "atcmd.h"
+#include "zport.h"
+
+#define at_processer_rx_buf_size 128
+#define at_processer_tx_buf_size 128
+
+// 接收到了多少数据
+volatile uint16_t s_at_cmd_uart_rx_off = 0;
+// 当前是否正在处理接收到的数据
+volatile bool s_at_cmd_uart_rx_buf_is_processing = false;
+
+static uint8_t at_rx_buf[at_processer_rx_buf_size];
+//static uint8_t at_tx_buf[at_processer_tx_buf_size];
 
 /* AT指令表 */
 const AT_cmd_func at_cmd_func[] = {
@@ -132,3 +144,45 @@ unsigned char at_cmd_parse(unsigned char *p, unsigned char len)
 
     return ret;
 }
+
+void at_cmd_processer_push_data(uint8_t rxdata)
+{
+    if (!s_at_cmd_uart_rx_buf_is_processing)
+    {
+        if (s_at_cmd_uart_rx_off < at_processer_rx_buf_size)
+        {
+            at_rx_buf[s_at_cmd_uart_rx_off] = rxdata;
+            s_at_cmd_uart_rx_off++;
+        }
+    }
+}
+
+void at_cmd_processer_try_process_data(void)
+{
+    /**
+     * @brief
+     * 根据modbus协议，当超过3.5个字符时间后依然没有收到数据
+     */
+    if (s_at_cmd_uart_rx_off != 0)
+    {
+        uint16_t modbus_uart_rx_off_before = s_at_cmd_uart_rx_off;
+
+        HAL_Delay(1);
+
+        sys_critical_enter();
+        if (s_at_cmd_uart_rx_off == modbus_uart_rx_off_before)
+        {
+            s_at_cmd_uart_rx_buf_is_processing = true;
+        }
+        sys_critical_exit();
+
+        if (s_at_cmd_uart_rx_buf_is_processing)
+        {
+            at_cmd_parse(at_rx_buf, s_at_cmd_uart_rx_off);
+            sys_critical_enter();
+            s_at_cmd_uart_rx_off = 0;
+            s_at_cmd_uart_rx_buf_is_processing = false;
+            sys_critical_exit();
+        }
+    }
+}

usersrc/atcmd.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "main.h"
 #include <stdio.h>
+#include <stdbool.h>
 
 #define AT_SUCCESS (0)        /* 指令正常 */
 #define AT_ERR (1)            /* 指令异常 */
@@ -33,3 +34,5 @@ unsigned char at_cmd_test(unsigned char *p, unsigned char len);
 unsigned char at_cmd_ip(unsigned char *p, unsigned char len);
 unsigned char AT_cmd_search(unsigned char *p, unsigned char len);
 unsigned char at_cmd_parse(unsigned char *p, unsigned char len);
+void at_cmd_processer_push_data(uint8_t rxdata);
+void at_cmd_processer_try_process_data(void);

usersrc/usermain.c

@@ -14,6 +14,7 @@
 #include "zflash.h"
 #include "config.h"
 #include "zkey.h"
+#include "atcmd.h"
 
 #define KEY_SCAN_PERIOD 20
 
@@ -76,7 +77,7 @@ void port_mock_on_uart_rx(uart_t *uart)
   // 处理指令串口接收到的数据
   if (uart->uarthandler == &DEBUG_UART)
   {
-    printf("%c", uart->rxbuf);
+    at_cmd_processer_push_data(uart->rxbuf);
   }
 }
 
@@ -96,6 +97,7 @@ void user_main()
     zkey_schedule();
     udp_client_recv();
     encoder_read_printf();
+    at_cmd_processer_try_process_data();
     port_do_debug_light_state();
     osDelay(1);
   }

usersrc/zport.c

@@ -4,6 +4,8 @@
 #include <stdio.h>
 #include "zboard.h"
 
+uint8_t g_port_exit_critical_count;
+
 uint32_t sys_haspassedms(uint32_t ticket)
 {
   uint32_t nowticket = HAL_GetTick();
@@ -80,3 +82,20 @@ void port_uart_start_all_uart_receive(void)
     uarts_start_receive(&m_uarts[i]);
   }
 }
+
+void sys_critical_enter(void)
+{
+  if (g_port_exit_critical_count == 0)
+  {
+    __disable_irq();
+  }
+  g_port_exit_critical_count++;
+}
+void sys_critical_exit(void)
+{
+  g_port_exit_critical_count--;
+  if (g_port_exit_critical_count == 0)
+  {
+    __enable_irq();
+  }
+}

usersrc/zport.h

@@ -15,6 +15,11 @@ void port_do_debug_light_state(void);
 /***********************************************************************************************************************
  * *******************************************************串口******************************************************** *
  ***********************************************************************************************************************/
+// 注意修改这里并不会修改真正的波特率，需要修改usart.c中对应的位置
+// #define at_cmd_baundrate 115200
+/*modebus判断一帧是以是否3.5byte时间内是否收到新的数据*/
+// #define kat_cmd_baundrate_one_packet_delay_us ((1000000 / (at_cmd_baundrate / 8) + 1) * 3) // 211
+
 typedef struct
 {
     UART_HandleTypeDef *uarthandler;
@@ -23,3 +28,5 @@ typedef struct
 
 void port_mock_on_uart_rx(uart_t *uart);
 void port_uart_start_all_uart_receive(void);
+void sys_critical_enter(void);
+void sys_critical_exit(void);