【主线待合】增加mount命令，修改cat实现。

bspMCU/l_stm32.c

@@ -434,6 +434,14 @@ static int l_w25qxx(lua_State *L)
 	lua_pushinteger(L, uId);
 	return 1;
 }
+
+int Rd_Lfs_Mount(void);
+static int l_mount (lua_State *L)
+{
+    int err = Rd_Lfs_Mount();
+    lua_pushinteger(L, err);
+    return 1;
+}
 #endif
 
 static int l_sendto(lua_State *L)
@@ -783,6 +791,7 @@ int luaopen_stm32(lua_State *L)
 
 #ifdef USE_W25QXX
     lua_register_help(L, "w25qxx", l_w25qxx, "Show w25qxx ID");
+    lua_register_help(L, "mount", l_mount, "mount littlefs disk");
 #endif
 
     lua_register_help(L, "sendto", l_sendto, "Send msg: sendto(dst,id,data)");

library/common/rd_stdio.c

@@ -305,7 +305,25 @@ WEAK long Rd_Mtell(void *file)
 
 WEAK int Rd_fflush(void *file)
 {
+#ifdef USE_W25QXX
+#if LV_USE_FS_LITTLEFS
+    (void)file;
     return RD_SUCCESS;
+#else
+    if (file == NULL) return RD_FAILURE;
+    lfs_file_t *fp = (lfs_file_t *)file;
+    int err = lfs_file_sync(&g_lfs, fp);
+    if (err < 0)
+    {
+        printf("lfs_file_sync failed: %d\n", err);
+        return RD_FAILURE;
+    }
+    return RD_SUCCESS;
+#endif
+#else
+    (void)file;
+    return RD_FAILURE;
+#endif
 }
 
 WEAK int Rd_remove(const char *filename)
@@ -335,6 +353,12 @@ WEAK int Rd_rename(const char *oldpath, const char *newpath)
 #endif
 }
 
+int Rd_Lfs_Mount(void)
+{
+	lfs_format(&g_lfs, &g_cfg);
+	return lfs_mount(&g_lfs, &g_cfg);
+}
+
 WEAK void Rd_LittleFSInit(void)
 {
 #ifdef USE_W25QXX
@@ -345,8 +369,7 @@ WEAK void Rd_LittleFSInit(void)
 	if (err)
 	{
 		printf("mount error format...\n");
-		lfs_format(&g_lfs, &g_cfg);
-		lfs_mount(&g_lfs, &g_cfg);
+		(void)Rd_Lfs_Mount();
 	}
 	return;
 #else

lua/lua.c

@@ -462,22 +462,25 @@ static int l_echo(lua_State *L)
 
 static int l_cat(lua_State *L)
 {
-    size_t len;
-    const char *path = luaL_checklstring(L, 1, &len);
-    char str[64] = {0};
+    const char *path = luaL_checkstring(L, 1);
+    char buf[128];              /* 小缓冲区，循环读取整个文件 */
 
     void *fp = Rd_Fopen(path, "r");
-    if (fp != NULL)
+    if (fp == NULL)
     {
-        Rd_Mread(str, sizeof(str), fp);
-        Rd_Mclose(fp);
-        lua_pushstring(L, str);
+        lua_print("cat: cannot open '%s'\n", path);
+        return 0;
     }
-    else 
+
+    ssize_t n;
+    while ((n = Rd_Mread(buf, sizeof(buf), fp)) > 0)
     {
-        lua_pushstring(L, "");
+        /* 用精度限定打印，避免依赖缓冲区末尾的 '\0'，也支持二进制内容 */
+        lua_print("%.*s", (int)n, buf);
     }
-    return 1;
+
+    Rd_Mclose(fp);
+    return 0;   /* 直接打印到终端，不再向 Lua 返回字符串 */
 }
 
 static int l_mv(lua_State *L)