Jim Flynn / Mbed OS wifi_Example

wifi test

Dependencies:   X_NUCLEO_IKS01A2 mbed-http

easy-connect/atmel-rf-driver/source/at24mac.cpp@0:24d3eb812fd4, 2018-09-05 (annotated)

Committer:
JMF
Date:
Wed Sep 05 14:28:24 2018 +0000
Revision:
0:24d3eb812fd4
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JMF 0:24d3eb812fd4 1 /*
JMF 0:24d3eb812fd4 2 * Copyright (c) 2016-2016 ARM Limited. All rights reserved.
JMF 0:24d3eb812fd4 3 * SPDX-License-Identifier: Apache-2.0
JMF 0:24d3eb812fd4 4 * Licensed under the Apache License, Version 2.0 (the License); you may
JMF 0:24d3eb812fd4 5 * not use this file except in compliance with the License.
JMF 0:24d3eb812fd4 6 * You may obtain a copy of the License at
JMF 0:24d3eb812fd4 7 *
JMF 0:24d3eb812fd4 8 * http://www.apache.org/licenses/LICENSE-2.0
JMF 0:24d3eb812fd4 9 *
JMF 0:24d3eb812fd4 10 * Unless required by applicable law or agreed to in writing, software
JMF 0:24d3eb812fd4 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
JMF 0:24d3eb812fd4 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
JMF 0:24d3eb812fd4 13 * See the License for the specific language governing permissions and
JMF 0:24d3eb812fd4 14 * limitations under the License.
JMF 0:24d3eb812fd4 15 */
JMF 0:24d3eb812fd4 16 #include "at24mac.h"
JMF 0:24d3eb812fd4 17
JMF 0:24d3eb812fd4 18 /* Device addressing */
JMF 0:24d3eb812fd4 19 #define AT24MAC_EEPROM_ADDRESS (0x0A<<4)
JMF 0:24d3eb812fd4 20 #define AT24MAC_RW_PROTECT_ADDRESS (0x06<<4)
JMF 0:24d3eb812fd4 21 #define AT24MAC_SERIAL_ADDRESS (0x0B<<4)
JMF 0:24d3eb812fd4 22
JMF 0:24d3eb812fd4 23 /* Known memory blocks */
JMF 0:24d3eb812fd4 24 #define AT24MAC_SERIAL_OFFSET (0x80)
JMF 0:24d3eb812fd4 25 #define AT24MAC_EUI64_OFFSET (0x98)
JMF 0:24d3eb812fd4 26 #define AT24MAC_EUI48_OFFSET (0x9A)
JMF 0:24d3eb812fd4 27
JMF 0:24d3eb812fd4 28 #define SERIAL_LEN 16
JMF 0:24d3eb812fd4 29 #define EUI64_LEN 8
JMF 0:24d3eb812fd4 30 #define EUI48_LEN 6
JMF 0:24d3eb812fd4 31
JMF 0:24d3eb812fd4 32 AT24Mac::I2CReset::I2CReset(PinName sda, PinName scl)
JMF 0:24d3eb812fd4 33 {
JMF 0:24d3eb812fd4 34 mbed::DigitalInOut SDA(sda, PIN_OUTPUT, PullUp, 1);
JMF 0:24d3eb812fd4 35 mbed::DigitalInOut SCL(scl, PIN_OUTPUT, PullUp, 0);
JMF 0:24d3eb812fd4 36 //generate 9 clocks for worst-case scenario
JMF 0:24d3eb812fd4 37 for (int i = 0; i < 10; ++i) {
JMF 0:24d3eb812fd4 38 SCL = 1;
JMF 0:24d3eb812fd4 39 wait_us(5);
JMF 0:24d3eb812fd4 40 SCL = 0;
JMF 0:24d3eb812fd4 41 wait_us(5);
JMF 0:24d3eb812fd4 42 }
JMF 0:24d3eb812fd4 43 //generate a STOP condition
JMF 0:24d3eb812fd4 44 SDA = 0;
JMF 0:24d3eb812fd4 45 wait_us(5);
JMF 0:24d3eb812fd4 46 SCL = 1;
JMF 0:24d3eb812fd4 47 wait_us(5);
JMF 0:24d3eb812fd4 48 SDA = 1;
JMF 0:24d3eb812fd4 49 wait_us(5);
JMF 0:24d3eb812fd4 50 }
JMF 0:24d3eb812fd4 51
JMF 0:24d3eb812fd4 52 /*I2C needs to be reset before constructing the I2C object (in case I2C is stuck)
JMF 0:24d3eb812fd4 53 because they use the same pins, therefore i2c_reset has to be before _i2c
JMF 0:24d3eb812fd4 54 in the initializer list*/
JMF 0:24d3eb812fd4 55 AT24Mac::AT24Mac(PinName sda, PinName scl) : i2c_reset(sda, scl), _i2c(sda, scl)
JMF 0:24d3eb812fd4 56 {
JMF 0:24d3eb812fd4 57 // Do nothing
JMF 0:24d3eb812fd4 58 }
JMF 0:24d3eb812fd4 59
JMF 0:24d3eb812fd4 60 int AT24Mac::read_serial(void *buf)
JMF 0:24d3eb812fd4 61 {
JMF 0:24d3eb812fd4 62 char offset = AT24MAC_SERIAL_OFFSET;
JMF 0:24d3eb812fd4 63 if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true))
JMF 0:24d3eb812fd4 64 return -1; //No ACK
JMF 0:24d3eb812fd4 65 return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, SERIAL_LEN);
JMF 0:24d3eb812fd4 66 }
JMF 0:24d3eb812fd4 67
JMF 0:24d3eb812fd4 68 int AT24Mac::read_eui64(void *buf)
JMF 0:24d3eb812fd4 69 {
JMF 0:24d3eb812fd4 70 char offset = AT24MAC_EUI64_OFFSET;
JMF 0:24d3eb812fd4 71 if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true))
JMF 0:24d3eb812fd4 72 return -1; //No ACK
JMF 0:24d3eb812fd4 73 return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, EUI64_LEN);
JMF 0:24d3eb812fd4 74 }
JMF 0:24d3eb812fd4 75
JMF 0:24d3eb812fd4 76 int AT24Mac::read_eui48(void *buf)
JMF 0:24d3eb812fd4 77 {
JMF 0:24d3eb812fd4 78 char offset = AT24MAC_EUI48_OFFSET;
JMF 0:24d3eb812fd4 79 if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true))
JMF 0:24d3eb812fd4 80 return -1; //No ACK
JMF 0:24d3eb812fd4 81 return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, EUI48_LEN);
JMF 0:24d3eb812fd4 82 }