µOS++ IIIe Reference 6.3.17
The third edition of µOS++, a POSIX inspired open source framework, written in C++
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trace-segger-rtt.cpp
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1/*
2 * This file is part of the µOS++ distribution.
3 * (https://github.com/micro-os-plus)
4 * Copyright (c) 2016 Liviu Ionescu.
5 *
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use,
10 * copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom
12 * the Software is furnished to do so, subject to the following
13 * conditions:
14 *
15 * The above copyright notice and this permission notice shall be
16 * included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 */
27
28#if defined(__ARM_EABI__)
29
30// ----------------------------------------------------------------------------
31
32#if defined(TRACE)
33
34#include <cmsis-plus/os-app-config.h>
35
36#if defined(OS_USE_TRACE_SEGGER_RTT)
37
38#include <cmsis-plus/rtos/os.h>
40
41#include <cmsis_device.h>
42
43#include "SEGGER_RTT.h"
44
45// ----------------------------------------------------------------------------
46
47namespace os
48{
49 namespace trace
50 {
51 // --------------------------------------------------------------------
52
53 void
54 initialize (void)
55 {
56 SEGGER_RTT_Init ();
57
58 // Clear the SLEEPDEEP.
59 // This does not guarantee that the WFI will not prevent
60 // the J-Link to read the RTT buffer, but it is the best it
61 // can be done at this level.
62 SCB->SCR &= ~SCB_SCR_SLEEPDEEP_Msk;
63 }
64
65 // --------------------------------------------------------------------
66
67 ssize_t
68 write (const void* buf, std::size_t nbyte)
69 {
70 if (buf == nullptr || nbyte == 0)
71 {
72 return 0;
73 }
74
75 if (nbyte > BUFFER_SIZE_UP)
76 {
77 return 0;
78 }
79
80 ssize_t ret;
81
82 rtos::interrupts::critical_section ics;
83 ret = (ssize_t) SEGGER_RTT_WriteNoLock (0, buf, nbyte);
84
85 return ret;
86 }
87
88 void
89 flush (void)
90 {
91 while (_SEGGER_RTT.aUp[0].WrOff != _SEGGER_RTT.aUp[0].RdOff)
92 {
93 __NOP ();
94 }
95 }
96
97 } /* namespace trace */
98} /* namespace os */
99
100#endif /* defined(OS_USE_TRACE_SEGGER_RTT) */
101#endif /* defined(TRACE) */
102
103// ----------------------------------------------------------------------------
104
105#endif /* defined(__ARM_EABI__) */
106
void initialize(void)
Definition trace.cpp:50
ssize_t write(const void *buf, std::size_t nbyte)
Write the given number of bytes to the trace output channel.
Definition trace.cpp:60
void flush(void)
Flush the output.
Definition trace.cpp:66
System namespace.
Single file µOS++ RTOS definitions.