From e61d7ce84bdd39646169be0135dec8bdc9319590 Mon Sep 17 00:00:00 2001
From: Lizongdi <1210855344@qq.com>
Date: Sat, 10 Oct 2026 10:31:47 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=A3=E5=86=B3=E4=B8=B2=E5=8F=A3=E5=91=BD?=
 =?UTF-8?q?=E4=BB=A4=E5=BC=82=E5=B8=B8=EF=BC=8C=E5=A2=9E=E5=A4=A7=E4=B8=B2?=
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---
 bspMCU/l_uart.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/bspMCU/l_uart.c b/bspMCU/l_uart.c
index 02ab10d..6c2748c 100644
--- a/bspMCU/l_uart.c
+++ b/bspMCU/l_uart.c
@@ -45,11 +45,14 @@ static int l_com_new(lua_State *L)
         
     if (id == 1 || id == 2)
     {    
-        TUartUserData *ptUartUserData = UART_userdata_init(LUACOM_ID, baudrate, 0);
+        TUartUserData *ptUartUserData = UART_userdata_init(LUACOM_ID, baudrate, 4096);
         if (NULL == ptUartUserData) 
         {
             lua_print("com is already used\n");
-            return g_ptCom1;
+            u->m_ptComCtrl = g_ptCom1;
+            luaL_getmetatable(L, "stm32.COMMT");
+			lua_setmetatable(L, -2);
+			return 1;
         }
         g_ptCom1 = rd_ComCreate(NULL, NULL, COM1_Send, ptUartUserData->m_buf_size, ptUartUserData);
         UART_IT_init(g_ptCom1);
@@ -62,8 +65,11 @@ static int l_com_new(lua_State *L)
         g_ptCom0 = bsp_usb_init();
 #endif
 #else
-        TUartUserData *ptUartUserData = UART_userdata_init(0, baudrate, 0);
-        if (NULL == ptUartUserData) lua_print("com is already used\n");
+        TUartUserData *ptUartUserData = UART_userdata_init(0, baudrate, 4096);
+        if (NULL == ptUartUserData)
+        {
+        	lua_print("com is already used\n");
+        }
         g_ptCom0 = rd_ComCreate(NULL, NULL, COM0_Send, ptUartUserData->m_buf_size, ptUartUserData);
         UART_IT_init(g_ptCom0);
 #endif