BA / SerialCom

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Fork of OmniWheels by Gustav Atmel

mbed-os/drivers/SerialWireOutput.h@2:798925c9e4a8, 2018-05-01 (annotated)

Committer:
gustavatmel
Date:
Tue May 01 15:55:34 2018 +0000
Revision:
2:798925c9e4a8
Parent:
1:9c5af431a1f1 
bluetooth

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gustavatmel 1:9c5af431a1f1 1 /* mbed Microcontroller Library
gustavatmel 1:9c5af431a1f1 2 * Copyright (c) 2017 ARM Limited
gustavatmel 1:9c5af431a1f1 3 *
gustavatmel 1:9c5af431a1f1 4 * Licensed under the Apache License, Version 2.0 (the "License");
gustavatmel 1:9c5af431a1f1 5 * you may not use this file except in compliance with the License.
gustavatmel 1:9c5af431a1f1 6 * You may obtain a copy of the License at
gustavatmel 1:9c5af431a1f1 7 *
gustavatmel 1:9c5af431a1f1 8 * http://www.apache.org/licenses/LICENSE-2.0
gustavatmel 1:9c5af431a1f1 9 *
gustavatmel 1:9c5af431a1f1 10 * Unless required by applicable law or agreed to in writing, software
gustavatmel 1:9c5af431a1f1 11 * distributed under the License is distributed on an "AS IS" BASIS,
gustavatmel 1:9c5af431a1f1 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
gustavatmel 1:9c5af431a1f1 13 * See the License for the specific language governing permissions and
gustavatmel 1:9c5af431a1f1 14 * limitations under the License.
gustavatmel 1:9c5af431a1f1 15 */
gustavatmel 1:9c5af431a1f1 16
gustavatmel 1:9c5af431a1f1 17 #if defined(DEVICE_ITM)
gustavatmel 1:9c5af431a1f1 18
gustavatmel 1:9c5af431a1f1 19 #include "hal/itm_api.h"
gustavatmel 1:9c5af431a1f1 20 #include "platform/FileHandle.h"
gustavatmel 1:9c5af431a1f1 21
gustavatmel 1:9c5af431a1f1 22 namespace mbed {
gustavatmel 1:9c5af431a1f1 23
gustavatmel 1:9c5af431a1f1 24 class SerialWireOutput : public FileHandle {
gustavatmel 1:9c5af431a1f1 25
gustavatmel 1:9c5af431a1f1 26 public:
gustavatmel 1:9c5af431a1f1 27
gustavatmel 1:9c5af431a1f1 28 SerialWireOutput(void)
gustavatmel 1:9c5af431a1f1 29 {
gustavatmel 1:9c5af431a1f1 30 /* Initialize ITM using internal init function. */
gustavatmel 1:9c5af431a1f1 31 mbed_itm_init();
gustavatmel 1:9c5af431a1f1 32 }
gustavatmel 1:9c5af431a1f1 33
gustavatmel 1:9c5af431a1f1 34 virtual ssize_t write(const void *buffer, size_t size)
gustavatmel 1:9c5af431a1f1 35 {
gustavatmel 1:9c5af431a1f1 36 const unsigned char *buf = static_cast<const unsigned char *>(buffer);
gustavatmel 1:9c5af431a1f1 37
gustavatmel 1:9c5af431a1f1 38 /* Send buffer one character at a time over the ITM SWO port */
gustavatmel 1:9c5af431a1f1 39 for (size_t i = 0; i < size; i++) {
gustavatmel 1:9c5af431a1f1 40 mbed_itm_send(ITM_PORT_SWO, buf[i]);
gustavatmel 1:9c5af431a1f1 41 }
gustavatmel 1:9c5af431a1f1 42 return size;
gustavatmel 1:9c5af431a1f1 43 }
gustavatmel 1:9c5af431a1f1 44
gustavatmel 1:9c5af431a1f1 45 virtual ssize_t read(void *buffer, size_t size)
gustavatmel 1:9c5af431a1f1 46 {
gustavatmel 1:9c5af431a1f1 47 /* Reading is not supported by this file handle */
gustavatmel 1:9c5af431a1f1 48 return -EBADF;
gustavatmel 1:9c5af431a1f1 49 }
gustavatmel 1:9c5af431a1f1 50
gustavatmel 1:9c5af431a1f1 51 virtual off_t seek(off_t offset, int whence = SEEK_SET)
gustavatmel 1:9c5af431a1f1 52 {
gustavatmel 1:9c5af431a1f1 53 /* Seeking is not support by this file handler */
gustavatmel 1:9c5af431a1f1 54 return -ESPIPE;
gustavatmel 1:9c5af431a1f1 55 }
gustavatmel 1:9c5af431a1f1 56
gustavatmel 1:9c5af431a1f1 57 virtual off_t size()
gustavatmel 1:9c5af431a1f1 58 {
gustavatmel 1:9c5af431a1f1 59 /* Size is not defined for this file handle */
gustavatmel 1:9c5af431a1f1 60 return -EINVAL;
gustavatmel 1:9c5af431a1f1 61 }
gustavatmel 1:9c5af431a1f1 62
gustavatmel 1:9c5af431a1f1 63 virtual int isatty()
gustavatmel 1:9c5af431a1f1 64 {
gustavatmel 1:9c5af431a1f1 65 /* File handle is used for terminal output */
gustavatmel 1:9c5af431a1f1 66 return true;
gustavatmel 1:9c5af431a1f1 67 }
gustavatmel 1:9c5af431a1f1 68
gustavatmel 1:9c5af431a1f1 69 virtual int close()
gustavatmel 1:9c5af431a1f1 70 {
gustavatmel 1:9c5af431a1f1 71 return 0;
gustavatmel 1:9c5af431a1f1 72 }
gustavatmel 1:9c5af431a1f1 73 };
gustavatmel 1:9c5af431a1f1 74
gustavatmel 1:9c5af431a1f1 75 } // namespace mbed
gustavatmel 1:9c5af431a1f1 76
gustavatmel 1:9c5af431a1f1 77 #endif