From 2ad6e28237086ccee8fcfcecdac16b6a489bfce8 Mon Sep 17 00:00:00 2001
From: guo <guozhanxin@rt-thread.com>
Date: Sun, 27 Mar 2022 00:53:23 +0800
Subject: [PATCH] Fixed the issue LOG_HEX no output at asyn mode. (#5721)

---
 components/utilities/ulog/ulog.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/components/utilities/ulog/ulog.c b/components/utilities/ulog/ulog.c
index 4bf106c8d9..f8f11aaf78 100644
--- a/components/utilities/ulog/ulog.c
+++ b/components/utilities/ulog/ulog.c
@@ -753,6 +753,13 @@ void ulog_hexdump(const char *tag, rt_size_t width, rt_uint8_t *buf, rt_size_t s
     }
 #endif /* ULOG_USING_FILTER */
 
+#ifdef ULOG_USING_ASYNC_OUTPUT
+    if (ulog.async_rb == RT_NULL)
+    {
+        ulog.async_rb = rt_ringbuffer_create(ULOG_ASYNC_OUTPUT_BUF_SIZE);
+    }
+#endif
+
     /* get log buffer */
     log_buf = get_log_buf();
 
-- 
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