[Utilities] Add more options for logtrace.

components/utilities/logtrace/memlog.c

@@ -0,0 +1,61 @@
+/*
+ * File      : memlog.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2013, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-06-26     Grissiom     the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <log_trace.h>
+
+#define PIPE_SZ    2048
+#define PIPE_NAME  "memlog"
+
+static rt_pipe_t *_log_pipe = NULL;
+static rt_uint8_t outbuf[1024];
+void memlog_flush(void)
+{
+    rt_size_t readsz;
+    rt_device_t console;
+
+    console = rt_console_get_device();
+    if (!console) return;
+
+    readsz = rt_device_read((rt_device_t)&(_log_pipe->parent), 0, outbuf, sizeof(outbuf));
+    if (readsz)
+        rt_device_write(console, 0, outbuf, readsz);
+}
+
+int memlog_init(void)
+{
+    _log_pipe = rt_pipe_create(PIPE_NAME, PIPE_SZ);
+    if (_log_pipe == RT_NULL)
+    {
+        rt_kprintf("init pipe device failed.\n");
+        return -1;
+    }
+
+    log_trace_set_device(PIPE_NAME);
+    rt_thread_idle_sethook(memlog_flush);
+    
+    return 0;
+}
+INIT_APP_EXPORT(memlog_init);