From f74a19b9fd32c3c6c3bb3a2626886cf422bf4ce9 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Mon, 17 Nov 2008 23:59:16 +0000
Subject: [PATCH] Add option to use C buffered I/O in examples/serloop
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1274 42af7a65-404d-4744-a932-0658087f49c3
---
examples/README.txt | 7 ++++++-
examples/serloop/main.c | 22 +++++++++++++++++++++-
2 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/examples/README.txt b/examples/README.txt
index 84deee63d7..2d8ea8a2d1 100644
--- a/examples/README.txt
+++ b/examples/README.txt
@@ -120,7 +120,12 @@ examples/serloop
^^^^^^^^^^^^^^^^
This is a mindlessly simple loopback test on the console. Useful
- for testing new serial drivers.
+ for testing new serial drivers. Configuration options include:
+
+ * CONFIG_EXAMPLES_SERLOOP_BUFIO
+ Use C buffered I/O (getchar/putchar) vs. raw console I/O
+ (read/read). The behavior of the NuttX getchar() call is
+ very hostile unless you also set CONFIG_STDIO_BUFFER_SIZE=0.
examples/udp
^^^^^^^^^^^^
diff --git a/examples/serloop/main.c b/examples/serloop/main.c
index 990fe13ed2..d59e532090 100644
--- a/examples/serloop/main.c
+++ b/examples/serloop/main.c
@@ -38,6 +38,8 @@
****************************************************************************/
#include <nuttx/config.h>
+
+#include <stdio.h>
#include <unistd.h>
/****************************************************************************
@@ -71,6 +73,23 @@ void user_initialize(void)
int user_start(int argc, char *argv[])
{
+#ifdef CONFIG_EXAMPLES_SERLOOP_BUFIO
+ int ch;
+
+ for (;;)
+ {
+ ch = getchar();
+ if (ch < 1)
+ {
+ ch = '!';
+ }
+ else if ((ch < 0x20 || ch > 0x7e) && ch != '\n')
+ {
+ ch = '.';
+ }
+ putchar(ch);
+ }
+#else
ubyte ch;
int ret;
@@ -81,12 +100,13 @@ int user_start(int argc, char *argv[])
{
ch = '!';
}
- else if (ch < 0x20 || ch > 0x7e)
+ else if ((ch < 0x20 || ch > 0x7e) && ch != '\n')
{
ch = '.';
}
ret = write(1, &ch, 1);
}
+#endif
return 0;
}
--
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