Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/filesystem/bd/SlicingBlockDevice.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2017 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16
marcozecchini 0:9fca2b23d0ba 17 #include "SlicingBlockDevice.h"
marcozecchini 0:9fca2b23d0ba 18
marcozecchini 0:9fca2b23d0ba 19
marcozecchini 0:9fca2b23d0ba 20 SlicingBlockDevice::SlicingBlockDevice(BlockDevice *bd, bd_addr_t start, bd_addr_t stop)
marcozecchini 0:9fca2b23d0ba 21 : _bd(bd)
marcozecchini 0:9fca2b23d0ba 22 , _start_from_end(false), _start(start)
marcozecchini 0:9fca2b23d0ba 23 , _stop_from_end(false), _stop(stop)
marcozecchini 0:9fca2b23d0ba 24 {
marcozecchini 0:9fca2b23d0ba 25 if ((int64_t)_start < 0) {
marcozecchini 0:9fca2b23d0ba 26 _start_from_end = true;
marcozecchini 0:9fca2b23d0ba 27 _start = -_start;
marcozecchini 0:9fca2b23d0ba 28 }
marcozecchini 0:9fca2b23d0ba 29
marcozecchini 0:9fca2b23d0ba 30 if ((int64_t)_stop <= 0) {
marcozecchini 0:9fca2b23d0ba 31 _stop_from_end = true;
marcozecchini 0:9fca2b23d0ba 32 _stop = -_stop;
marcozecchini 0:9fca2b23d0ba 33 }
marcozecchini 0:9fca2b23d0ba 34 }
marcozecchini 0:9fca2b23d0ba 35
marcozecchini 0:9fca2b23d0ba 36 int SlicingBlockDevice::init()
marcozecchini 0:9fca2b23d0ba 37 {
marcozecchini 0:9fca2b23d0ba 38 int err = _bd->init();
marcozecchini 0:9fca2b23d0ba 39 if (err) {
marcozecchini 0:9fca2b23d0ba 40 return err;
marcozecchini 0:9fca2b23d0ba 41 }
marcozecchini 0:9fca2b23d0ba 42
marcozecchini 0:9fca2b23d0ba 43 bd_size_t size = _bd->size();
marcozecchini 0:9fca2b23d0ba 44
marcozecchini 0:9fca2b23d0ba 45 // Calculate from_end values
marcozecchini 0:9fca2b23d0ba 46 if (_start_from_end) {
marcozecchini 0:9fca2b23d0ba 47 _start_from_end = false;
marcozecchini 0:9fca2b23d0ba 48 _start = size - _start;
marcozecchini 0:9fca2b23d0ba 49 }
marcozecchini 0:9fca2b23d0ba 50
marcozecchini 0:9fca2b23d0ba 51 if (_stop_from_end) {
marcozecchini 0:9fca2b23d0ba 52 _stop_from_end = false;
marcozecchini 0:9fca2b23d0ba 53 _stop = size - _stop;
marcozecchini 0:9fca2b23d0ba 54 }
marcozecchini 0:9fca2b23d0ba 55
marcozecchini 0:9fca2b23d0ba 56 // Check that block addresses are valid
marcozecchini 0:9fca2b23d0ba 57 MBED_ASSERT(_bd->is_valid_erase(_start, _stop - _start));
marcozecchini 0:9fca2b23d0ba 58
marcozecchini 0:9fca2b23d0ba 59 return 0;
marcozecchini 0:9fca2b23d0ba 60 }
marcozecchini 0:9fca2b23d0ba 61
marcozecchini 0:9fca2b23d0ba 62 int SlicingBlockDevice::deinit()
marcozecchini 0:9fca2b23d0ba 63 {
marcozecchini 0:9fca2b23d0ba 64 return _bd->deinit();
marcozecchini 0:9fca2b23d0ba 65 }
marcozecchini 0:9fca2b23d0ba 66
marcozecchini 0:9fca2b23d0ba 67 int SlicingBlockDevice::read(void *b, bd_addr_t addr, bd_size_t size)
marcozecchini 0:9fca2b23d0ba 68 {
marcozecchini 0:9fca2b23d0ba 69 MBED_ASSERT(is_valid_read(addr, size));
marcozecchini 0:9fca2b23d0ba 70 return _bd->read(b, addr + _start, size);
marcozecchini 0:9fca2b23d0ba 71 }
marcozecchini 0:9fca2b23d0ba 72
marcozecchini 0:9fca2b23d0ba 73 int SlicingBlockDevice::program(const void *b, bd_addr_t addr, bd_size_t size)
marcozecchini 0:9fca2b23d0ba 74 {
marcozecchini 0:9fca2b23d0ba 75 MBED_ASSERT(is_valid_program(addr, size));
marcozecchini 0:9fca2b23d0ba 76 return _bd->program(b, addr + _start, size);
marcozecchini 0:9fca2b23d0ba 77 }
marcozecchini 0:9fca2b23d0ba 78
marcozecchini 0:9fca2b23d0ba 79 int SlicingBlockDevice::erase(bd_addr_t addr, bd_size_t size)
marcozecchini 0:9fca2b23d0ba 80 {
marcozecchini 0:9fca2b23d0ba 81 MBED_ASSERT(is_valid_erase(addr, size));
marcozecchini 0:9fca2b23d0ba 82 return _bd->erase(addr + _start, size);
marcozecchini 0:9fca2b23d0ba 83 }
marcozecchini 0:9fca2b23d0ba 84
marcozecchini 0:9fca2b23d0ba 85 bd_size_t SlicingBlockDevice::get_read_size() const
marcozecchini 0:9fca2b23d0ba 86 {
marcozecchini 0:9fca2b23d0ba 87 return _bd->get_read_size();
marcozecchini 0:9fca2b23d0ba 88 }
marcozecchini 0:9fca2b23d0ba 89
marcozecchini 0:9fca2b23d0ba 90 bd_size_t SlicingBlockDevice::get_program_size() const
marcozecchini 0:9fca2b23d0ba 91 {
marcozecchini 0:9fca2b23d0ba 92 return _bd->get_program_size();
marcozecchini 0:9fca2b23d0ba 93 }
marcozecchini 0:9fca2b23d0ba 94
marcozecchini 0:9fca2b23d0ba 95 bd_size_t SlicingBlockDevice::get_erase_size() const
marcozecchini 0:9fca2b23d0ba 96 {
marcozecchini 0:9fca2b23d0ba 97 return _bd->get_erase_size();
marcozecchini 0:9fca2b23d0ba 98 }
marcozecchini 0:9fca2b23d0ba 99
marcozecchini 0:9fca2b23d0ba 100 bd_size_t SlicingBlockDevice::size() const
marcozecchini 0:9fca2b23d0ba 101 {
marcozecchini 0:9fca2b23d0ba 102 return _stop - _start;
marcozecchini 0:9fca2b23d0ba 103 }