Mbed OS Reference | SerialWireOutput.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #ifndef MBED_SERIALWIREOUTPUT_H
 #define MBED_SERIALWIREOUTPUT_H
 
 #if defined(DEVICE_ITM)
 
 #include "hal/itm_api.h"
 #include "platform/FileHandle.h"
 
 namespace mbed {
 
 class SerialWireOutput : public FileHandle {
 
 public:
 
     SerialWireOutput(void)
     {
         /* Initialize ITM using internal init function. */
         mbed_itm_init();
     }
 
     virtual ssize_t write(const void *buffer, size_t size)
     {
         mbed_itm_send_block(ITM_PORT_SWO, buffer, size);
 
         return size;
     }
 
     virtual ssize_t read(void *buffer, size_t size)
     {
         /* Reading is not supported by this file handle */
         return -EBADF;
     }
 
     virtual off_t seek(off_t offset, int whence = SEEK_SET)
     {
         /* Seeking is not support by this file handler */
         return -ESPIPE;
     }
 
     virtual off_t size()
     {
         /* Size is not defined for this file handle */
         return -EINVAL;
     }
 
     virtual int isatty()
     {
         /* File handle is used for terminal output */
         return true;
     }
 
     virtual int close()
     {
         return 0;
     }
 };
 
 } // namespace mbed
 
 #endif // DEVICE_ITM
 
 #endif // MBED_SERIALWIREOUTPUT_H
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