mirror of https://github.com/ARMmbed/mbed-os.git
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "hal/device_uid_api.h"
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#include "platform/mbed_assert.h"
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#include "platform/CriticalSectionLock.h"
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#include "drivers/DeviceUid.h"
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#if DEVICE_DEVICEUID
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namespace mbed {
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uint8_t DeviceUid::_uidbuf[MBED_DEVICEUID_SIZE] = {0};
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uint8_t* DeviceUid::_uidptr = NULL;
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char DeviceUid::_strbuf[DEVICEUID_STRING_BUFFER_SIZE] = {'\0'};
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char* DeviceUid::_strptr = NULL;
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#ifndef MBED_DEVICEUID_STR_SIZE_MAX
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const char DeviceUid::_hexChars[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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#endif
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DeviceUid::DeviceUid()
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{
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populate_uid_buf();
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}
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void DeviceUid::populate_uid_buf()
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{
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if (_uidptr == NULL) {
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CriticalSectionLock lock;
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device_uid_get_uid(_uidbuf);
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_uidptr = _uidbuf;
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}
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}
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void DeviceUid::populate_str_buf()
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{
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if (_strptr == NULL) {
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CriticalSectionLock lock;
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#ifdef MBED_DEVICEUID_STR_SIZE_MAX
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device_uid_get_str(_strbuf);
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_strptr = _strbuf;
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#else
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int pos = 0;
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populate_uid_buf();
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for (int i = 0; i < MBED_DEVICEUID_SIZE; ++i) {
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_strbuf[pos++] = _hexChars[_uidptr[i] >> 4];
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_strbuf[pos++] = _hexChars[_uidptr[i] & 0x0F];
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}
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_strbuf[pos] = '\0';
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_strptr = _strbuf;
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#endif
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}
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}
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} // namespace mbed
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#endif
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