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Dependents:   STM32_F103-C8T6basecanblink_led

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drivers/SerialWireOutput.h@185:08ed48f1de7f, 2018-04-19 (annotated)

Committer:
AnnaBridge
Date:
Thu Apr 19 17:12:19 2018 +0100
Revision:
185:08ed48f1de7f
mbed-dev library. Release version 161

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 185:08ed48f1de7f 1 /* mbed Microcontroller Library
AnnaBridge 185:08ed48f1de7f 2 * Copyright (c) 2017 ARM Limited
AnnaBridge 185:08ed48f1de7f 3 *
AnnaBridge 185:08ed48f1de7f 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 185:08ed48f1de7f 5 * you may not use this file except in compliance with the License.
AnnaBridge 185:08ed48f1de7f 6 * You may obtain a copy of the License at
AnnaBridge 185:08ed48f1de7f 7 *
AnnaBridge 185:08ed48f1de7f 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 185:08ed48f1de7f 9 *
AnnaBridge 185:08ed48f1de7f 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 185:08ed48f1de7f 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 185:08ed48f1de7f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 185:08ed48f1de7f 13 * See the License for the specific language governing permissions and
AnnaBridge 185:08ed48f1de7f 14 * limitations under the License.
AnnaBridge 185:08ed48f1de7f 15 */
AnnaBridge 185:08ed48f1de7f 16
AnnaBridge 185:08ed48f1de7f 17 #if defined(DEVICE_ITM)
AnnaBridge 185:08ed48f1de7f 18
AnnaBridge 185:08ed48f1de7f 19 #include "hal/itm_api.h"
AnnaBridge 185:08ed48f1de7f 20 #include "platform/FileHandle.h"
AnnaBridge 185:08ed48f1de7f 21
AnnaBridge 185:08ed48f1de7f 22 class SerialWireOutput : public FileHandle {
AnnaBridge 185:08ed48f1de7f 23 public:
AnnaBridge 185:08ed48f1de7f 24 SerialWireOutput(void)
AnnaBridge 185:08ed48f1de7f 25 {
AnnaBridge 185:08ed48f1de7f 26 /* Initialize ITM using internal init function. */
AnnaBridge 185:08ed48f1de7f 27 mbed_itm_init();
AnnaBridge 185:08ed48f1de7f 28 }
AnnaBridge 185:08ed48f1de7f 29
AnnaBridge 185:08ed48f1de7f 30 virtual ssize_t write(const void *buffer, size_t size)
AnnaBridge 185:08ed48f1de7f 31 {
AnnaBridge 185:08ed48f1de7f 32 const unsigned char *buf = static_cast<const unsigned char *>(buffer);
AnnaBridge 185:08ed48f1de7f 33
AnnaBridge 185:08ed48f1de7f 34 /* Send buffer one character at a time over the ITM SWO port */
AnnaBridge 185:08ed48f1de7f 35 for (size_t i = 0; i < size; i++) {
AnnaBridge 185:08ed48f1de7f 36 mbed_itm_send(ITM_PORT_SWO, buf[i]);
AnnaBridge 185:08ed48f1de7f 37 }
AnnaBridge 185:08ed48f1de7f 38 return size;
AnnaBridge 185:08ed48f1de7f 39 }
AnnaBridge 185:08ed48f1de7f 40
AnnaBridge 185:08ed48f1de7f 41 virtual ssize_t read(void *buffer, size_t size)
AnnaBridge 185:08ed48f1de7f 42 {
AnnaBridge 185:08ed48f1de7f 43 /* Reading is not supported by this file handle */
AnnaBridge 185:08ed48f1de7f 44 return -EBADF;
AnnaBridge 185:08ed48f1de7f 45 }
AnnaBridge 185:08ed48f1de7f 46
AnnaBridge 185:08ed48f1de7f 47 virtual off_t seek(off_t offset, int whence = SEEK_SET)
AnnaBridge 185:08ed48f1de7f 48 {
AnnaBridge 185:08ed48f1de7f 49 /* Seeking is not support by this file handler */
AnnaBridge 185:08ed48f1de7f 50 return -ESPIPE;
AnnaBridge 185:08ed48f1de7f 51 }
AnnaBridge 185:08ed48f1de7f 52
AnnaBridge 185:08ed48f1de7f 53 virtual off_t size()
AnnaBridge 185:08ed48f1de7f 54 {
AnnaBridge 185:08ed48f1de7f 55 /* Size is not defined for this file handle */
AnnaBridge 185:08ed48f1de7f 56 return -EINVAL;
AnnaBridge 185:08ed48f1de7f 57 }
AnnaBridge 185:08ed48f1de7f 58
AnnaBridge 185:08ed48f1de7f 59 virtual int isatty()
AnnaBridge 185:08ed48f1de7f 60 {
AnnaBridge 185:08ed48f1de7f 61 /* File handle is used for terminal output */
AnnaBridge 185:08ed48f1de7f 62 return true;
AnnaBridge 185:08ed48f1de7f 63 }
AnnaBridge 185:08ed48f1de7f 64
AnnaBridge 185:08ed48f1de7f 65 virtual int close()
AnnaBridge 185:08ed48f1de7f 66 {
AnnaBridge 185:08ed48f1de7f 67 return 0;
AnnaBridge 185:08ed48f1de7f 68 }
AnnaBridge 185:08ed48f1de7f 69 };
AnnaBridge 185:08ed48f1de7f 70
AnnaBridge 185:08ed48f1de7f 71 #endif