Denislam Valeev / Mbed OS Nucleo_rtos_basic

1

mbed-os/drivers/SerialWireOutput.h@0:e056ac8fecf8, 2018-03-13 (annotated)

Committer:
valeyev
Date:
Tue Mar 13 07:17:50 2018 +0000
Revision:
0:e056ac8fecf8
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valeyev 0:e056ac8fecf8 1 /* mbed Microcontroller Library
valeyev 0:e056ac8fecf8 2 * Copyright (c) 2017 ARM Limited
valeyev 0:e056ac8fecf8 3 *
valeyev 0:e056ac8fecf8 4 * Licensed under the Apache License, Version 2.0 (the "License");
valeyev 0:e056ac8fecf8 5 * you may not use this file except in compliance with the License.
valeyev 0:e056ac8fecf8 6 * You may obtain a copy of the License at
valeyev 0:e056ac8fecf8 7 *
valeyev 0:e056ac8fecf8 8 * http://www.apache.org/licenses/LICENSE-2.0
valeyev 0:e056ac8fecf8 9 *
valeyev 0:e056ac8fecf8 10 * Unless required by applicable law or agreed to in writing, software
valeyev 0:e056ac8fecf8 11 * distributed under the License is distributed on an "AS IS" BASIS,
valeyev 0:e056ac8fecf8 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
valeyev 0:e056ac8fecf8 13 * See the License for the specific language governing permissions and
valeyev 0:e056ac8fecf8 14 * limitations under the License.
valeyev 0:e056ac8fecf8 15 */
valeyev 0:e056ac8fecf8 16
valeyev 0:e056ac8fecf8 17 #if defined(DEVICE_ITM)
valeyev 0:e056ac8fecf8 18
valeyev 0:e056ac8fecf8 19 #include "hal/itm_api.h"
valeyev 0:e056ac8fecf8 20 #include "platform/FileHandle.h"
valeyev 0:e056ac8fecf8 21
valeyev 0:e056ac8fecf8 22 class SerialWireOutput : public FileHandle {
valeyev 0:e056ac8fecf8 23 public:
valeyev 0:e056ac8fecf8 24 SerialWireOutput(void)
valeyev 0:e056ac8fecf8 25 {
valeyev 0:e056ac8fecf8 26 /* Initialize ITM using internal init function. */
valeyev 0:e056ac8fecf8 27 mbed_itm_init();
valeyev 0:e056ac8fecf8 28 }
valeyev 0:e056ac8fecf8 29
valeyev 0:e056ac8fecf8 30 virtual ssize_t write(const void *buffer, size_t size)
valeyev 0:e056ac8fecf8 31 {
valeyev 0:e056ac8fecf8 32 const unsigned char *buf = static_cast<const unsigned char *>(buffer);
valeyev 0:e056ac8fecf8 33
valeyev 0:e056ac8fecf8 34 /* Send buffer one character at a time over the ITM SWO port */
valeyev 0:e056ac8fecf8 35 for (size_t i = 0; i < size; i++) {
valeyev 0:e056ac8fecf8 36 mbed_itm_send(ITM_PORT_SWO, buf[i]);
valeyev 0:e056ac8fecf8 37 }
valeyev 0:e056ac8fecf8 38 return size;
valeyev 0:e056ac8fecf8 39 }
valeyev 0:e056ac8fecf8 40
valeyev 0:e056ac8fecf8 41 virtual ssize_t read(void *buffer, size_t size)
valeyev 0:e056ac8fecf8 42 {
valeyev 0:e056ac8fecf8 43 /* Reading is not supported by this file handle */
valeyev 0:e056ac8fecf8 44 return -EBADF;
valeyev 0:e056ac8fecf8 45 }
valeyev 0:e056ac8fecf8 46
valeyev 0:e056ac8fecf8 47 virtual off_t seek(off_t offset, int whence = SEEK_SET)
valeyev 0:e056ac8fecf8 48 {
valeyev 0:e056ac8fecf8 49 /* Seeking is not support by this file handler */
valeyev 0:e056ac8fecf8 50 return -ESPIPE;
valeyev 0:e056ac8fecf8 51 }
valeyev 0:e056ac8fecf8 52
valeyev 0:e056ac8fecf8 53 virtual off_t size()
valeyev 0:e056ac8fecf8 54 {
valeyev 0:e056ac8fecf8 55 /* Size is not defined for this file handle */
valeyev 0:e056ac8fecf8 56 return -EINVAL;
valeyev 0:e056ac8fecf8 57 }
valeyev 0:e056ac8fecf8 58
valeyev 0:e056ac8fecf8 59 virtual int isatty()
valeyev 0:e056ac8fecf8 60 {
valeyev 0:e056ac8fecf8 61 /* File handle is used for terminal output */
valeyev 0:e056ac8fecf8 62 return true;
valeyev 0:e056ac8fecf8 63 }
valeyev 0:e056ac8fecf8 64
valeyev 0:e056ac8fecf8 65 virtual int close()
valeyev 0:e056ac8fecf8 66 {
valeyev 0:e056ac8fecf8 67 return 0;
valeyev 0:e056ac8fecf8 68 }
valeyev 0:e056ac8fecf8 69 };
valeyev 0:e056ac8fecf8 70
valeyev 0:e056ac8fecf8 71 #endif