数据包，添加包头包尾

main.c

@@ -228,14 +228,14 @@ static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
  *          If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
  */
 
-static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len,bool raw)
+static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len)
 {
     ret_code_t ret_val;
 
     NRF_LOG_DEBUG("Receiving data.");
     NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
-    // app_uart_put(0x5A);
-    // app_uart_put(data_len);
+    app_uart_put(0xA5);
+    app_uart_put(0x5A);
     for (uint32_t i = 0; i < data_len; i++)
     {
         do
@@ -248,28 +248,34 @@ static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_le
             }
         } while (ret_val == NRF_ERROR_BUSY);
     }
-    if(!raw){
     app_uart_put(0x5A);
     app_uart_put(0xA5);
-    }
+}
+
+
+
+static void ble_nus_chars_received_uart_print_ch4(uint8_t * p_data, uint16_t data_len)
+{
+    ret_code_t ret_val;
 
-    // if (p_data[data_len-1] == '\r')
-    // {
-    //     while (app_uart_put('\n') == NRF_ERROR_BUSY);
-    // }
-    if (ECHOBACK_BLE_UART_DATA)
+    NRF_LOG_DEBUG("Receiving data.");
+    NRF_LOG_HEXDUMP_DEBUG(p_data, data_len);
+    app_uart_put(0xA4);
+    app_uart_put(0x4A);
+    for (uint32_t i = 0; i < data_len; i++)
     {
-        // Send data back to the peripheral.
         do
         {
-            ret_val = ble_nus_c_string_send(&m_ble_nus_c, p_data, data_len);
+            ret_val = app_uart_put(p_data[i]);
             if ((ret_val != NRF_SUCCESS) && (ret_val != NRF_ERROR_BUSY))
             {
-                NRF_LOG_ERROR("Failed sending NUS message. Error 0x%x. ", ret_val);
+                NRF_LOG_ERROR("app_uart_put failed for index 0x%04x.", i);
                 APP_ERROR_CHECK(ret_val);
             }
         } while (ret_val == NRF_ERROR_BUSY);
     }
+    app_uart_put(0x4A);
+    app_uart_put(0xA4);
 }
 
 
@@ -357,10 +363,10 @@ static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, ble_nus_c_evt_t con
             break;
 
         case BLE_NUS_C_EVT_NUS_TX_EVT:
-            ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len,false);
+            ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
             break;
        case BLE_NUS_C_EVT_NUS_TX_EVT_2:
-            ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len,true);
+            ble_nus_chars_received_uart_print_ch4(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
             rxcnt+=p_ble_nus_evt->data_len;
             // printf("data_len:%d %d\n",p_ble_nus_evt->data_len,rxcnt);
            break;