drivers/segger: Add STREAM_RTT option

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

boards/sim/sim/sim/configs/segger/defconfig

@@ -68,5 +68,6 @@ CONFIG_SCHED_WAITPID=y
 CONFIG_SEGGER_SYSVIEW=y
 CONFIG_START_MONTH=6
 CONFIG_START_YEAR=2008
+CONFIG_STREAM_RTT=y
 CONFIG_SYSLOG_RTT=y
 CONFIG_SYSTEM_NSH=y

drivers/segger/Kconfig

@@ -78,6 +78,13 @@ endchoice # SEGGER_RTT_MODE
 
 endif # SEGGER_RTT
 
+config STREAM_RTT
+	bool "Stream to/from Segger J-Link RTT"
+	select SEGGER_RTT
+	default n
+	---help---
+		Use Segger J-Link RTT as a stream input and output.
+
 if SEGGER_SYSVIEW
 
 config SEGGER_SYSVIEW_RTT_CHANNEL

drivers/segger/Make.defs

@@ -54,7 +54,7 @@ TARGET_ZIP += $(SGDIR)/RTT.zip
 
 endif
 
-ifeq ($(CONFIG_SEGGER_RTT),y)
+ifeq ($(CONFIG_STREAM_RTT),y)
   CSRCS += segger/stream_rtt.c
 endif
 

drivers/segger/stream_rtt.c

@@ -25,7 +25,6 @@
 #include <assert.h>
 #include <stdio.h>
 
-#include <nuttx/config.h>
 #include <nuttx/kmalloc.h>
 #include <nuttx/streams.h>
 #include <nuttx/segger/rtt.h>

include/nuttx/segger/rtt.h

@@ -36,6 +36,7 @@
  * Type Declarations
  ****************************************************************************/
 
+#ifdef CONFIG_STREAM_RTT
 struct lib_rttoutstream_s
 {
   struct lib_outstream_s public;
@@ -51,6 +52,7 @@ struct lib_rttinstream_s
   FAR char *buffer;
   int channel;
 };
+#endif
 
 /****************************************************************************
  * Public Function Prototypes
@@ -61,6 +63,7 @@ extern "C"
 {
 #endif
 
+#ifdef CONFIG_STREAM_RTT
 /****************************************************************************
 * Name: lib_rttoutstream_open
 *****************************************************************************/
@@ -86,6 +89,7 @@ void lib_rttinstream_open(FAR struct lib_rttinstream_s *stream,
  ****************************************************************************/
 
 void lib_rttinstream_close(FAR struct lib_rttinstream_s *stream);
+#endif
 
 #ifdef __cplusplus
 }