mirror of https://github.com/ARMmbed/mbed-os.git
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if defined(DEVICE_ITM)
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#include "hal/itm_api.h"
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#include "platform/FileHandle.h"
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class SerialWireOutput : public FileHandle {
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public:
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SerialWireOutput(void)
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{
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/* Initialize ITM using internal init function. */
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mbed_itm_init();
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}
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virtual ssize_t write(const void *buffer, size_t size)
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{
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const unsigned char *buf = static_cast<const unsigned char *>(buffer);
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/* Send buffer one character at a time over the ITM SWO port */
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for (size_t i = 0; i < size; i++) {
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mbed_itm_send(ITM_PORT_SWO, buf[i]);
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}
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return size;
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}
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virtual ssize_t read(void *buffer, size_t size)
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{
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/* Reading is not supported by this file handle */
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return -EBADF;
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}
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virtual off_t seek(off_t offset, int whence = SEEK_SET)
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{
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/* Seeking is not support by this file handler */
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return -ESPIPE;
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}
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virtual off_t size()
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{
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/* Size is not defined for this file handle */
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return -EINVAL;
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}
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virtual int isatty()
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{
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/* File handle is used for terminal output */
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return true;
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}
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virtual int close()
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{
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return 0;
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}
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};
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#endif
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