From 3b1853ceb55d6929c2fedfb4f3adac1c89e7c11b Mon Sep 17 00:00:00 2001
From: sakumisu <1203593632@qq.com>
Date: Mon, 28 Jul 2025 21:23:23 +0800
Subject: [PATCH] fix(platform/rtthread): change RT_USING_CACHE to
 CONFIG_USB_DCACHE_ENABLE

Signed-off-by: sakumisu <1203593632@qq.com>
---
 platform/rtthread/usbd_serial.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/platform/rtthread/usbd_serial.c b/platform/rtthread/usbd_serial.c
index 42144396..aeb53a9b 100644
--- a/platform/rtthread/usbd_serial.c
+++ b/platform/rtthread/usbd_serial.c
@@ -123,7 +123,7 @@ static rt_ssize_t usbd_serial_write(struct rt_device *dev,
     }
     align_buf = (rt_uint8_t *)buffer;
 
-#ifdef RT_USING_CACHE
+#ifdef CONFIG_USB_DCACHE_ENABLE
     if ((uint32_t)buffer & (CONFIG_USB_ALIGN_SIZE - 1)) {
         align_buf = rt_malloc_align(size, CONFIG_USB_ALIGN_SIZE);
         if (!align_buf) {
@@ -215,7 +215,7 @@ void usbd_cdc_acm_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
 
             if (serial->parent.rx_indicate) {
                 serial->parent.rx_indicate(&serial->parent, nbytes);
-            }            
+            }
             break;
         }
     }