at24mac_s2lp.cpp

00001 /*
00002  * Copyright (c) 2019-2019 ARM Limited. All rights reserved.
00003  * SPDX-License-Identifier: Apache-2.0
00004  * Licensed under the Apache License, Version 2.0 (the License); you may
00005  * not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  * http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an AS IS BASIS, WITHOUT
00012  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include "NanostackRfPhys2lp.h"
00017 #include "at24mac_s2lp.h"
00018 
00019 
00020 #if DEVICE_I2C
00021 #ifdef AT24MAC
00022 
00023 /* Device addressing */
00024 #define AT24MAC_EEPROM_ADDRESS      (0x0A<<4)
00025 #define AT24MAC_RW_PROTECT_ADDRESS  (0x06<<4)
00026 #define AT24MAC_SERIAL_ADDRESS      (0x0B<<4)
00027 
00028 /* Known memory blocks */
00029 #define AT24MAC_SERIAL_OFFSET   (0x80)
00030 #define AT24MAC_EUI64_OFFSET    (0x98)
00031 #define AT24MAC_EUI48_OFFSET    (0x9A)
00032 
00033 #define SERIAL_LEN 16
00034 #define EUI64_LEN 8
00035 #define EUI48_LEN 6
00036 
00037 using namespace mbed;
00038 
00039 AT24Mac_s2lp::AT24Mac_s2lp(PinName sda, PinName scl) : _i2c(sda, scl)
00040 {
00041     // Do nothing
00042 }
00043 
00044 int AT24Mac_s2lp::read_serial(void *buf)
00045 {
00046     char offset = AT24MAC_SERIAL_OFFSET;
00047     if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
00048         return -1;    //No ACK
00049     }
00050     return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, SERIAL_LEN);
00051 }
00052 
00053 int AT24Mac_s2lp::read_eui64(void *buf)
00054 {
00055     char offset = AT24MAC_EUI64_OFFSET;
00056     if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
00057         return -1;    //No ACK
00058     }
00059     return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, EUI64_LEN);
00060 }
00061 
00062 int AT24Mac_s2lp::read_eui48(void *buf)
00063 {
00064     char offset = AT24MAC_EUI48_OFFSET;
00065     if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) {
00066         return -1;    //No ACK
00067     }
00068     return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char *)buf, EUI48_LEN);
00069 }
00070 
00071 #endif /* AT24MAC */
00072 #endif /* DEVICE_I2C */