mirror of https://github.com/ARMmbed/mbed-os.git
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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* Copyright (c) 2016-2016 ARM Limited. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* 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, WITHOUT
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* 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 "at24mac.h"
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#if DEVICE_I2C
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/* Device addressing */
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#define AT24MAC_EEPROM_ADDRESS (0x0A<<4)
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#define AT24MAC_RW_PROTECT_ADDRESS (0x06<<4)
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#define AT24MAC_SERIAL_ADDRESS (0x0B<<4)
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/* Known memory blocks */
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#define AT24MAC_SERIAL_OFFSET (0x80)
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#define AT24MAC_EUI64_OFFSET (0x98)
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#define AT24MAC_EUI48_OFFSET (0x9A)
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#define SERIAL_LEN 16
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#define EUI64_LEN 8
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#define EUI48_LEN 6
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using namespace mbed;
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AT24Mac::AT24Mac(PinName sda, PinName scl) : _i2c(sda, scl)
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{
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// Do nothing
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}
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int AT24Mac::read_serial(void *buf)
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{
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char offset = AT24MAC_SERIAL_OFFSET;
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if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
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return -1; //No ACK
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}
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return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, SERIAL_LEN);
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}
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int AT24Mac::read_eui64(void *buf)
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{
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char offset = AT24MAC_EUI64_OFFSET;
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if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
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return -1; //No ACK
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}
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return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, EUI64_LEN);
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}
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int AT24Mac::read_eui48(void *buf)
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{
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char offset = AT24MAC_EUI48_OFFSET;
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if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
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return -1; //No ACK
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}
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return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, EUI48_LEN);
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}
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#endif /* DEVICE_I2C */
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