xiaoxiang781216 commented on a change in pull request #5295:
URL: https://github.com/apache/incubator-nuttx/pull/5295#discussion_r790857009
##########
File path: arch/sim/src/sim/up_uart.c
##########
@@ -31,12 +31,16 @@
#include "up_internal.h"
-#if defined(USE_DEVCONSOLE) || CONFIG_SIM_UART_NUMBER > 0
+#if defined(USE_DEVCONSOLE) || defined(CONFIG_SIM_UART)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
-#define BUFSIZE 256
+#ifdef CONFIG_SIM_UART_BUFFER_SIZE
Review comment:
let's change to:
```
#define BUFSIZE CONFIG_SIM_UART_BUFFER_SIZE
```
or use CONFIG_SIM_UART_BUFFER_SIZE directly?
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