RTC auf true
Diff: components/802_15_4_RF/atmel-rf-driver/source/at24mac.cpp
- Revision:
- 2:7aab896b1a3b
diff -r 7bcfbc328423 -r 7aab896b1a3b components/802_15_4_RF/atmel-rf-driver/source/at24mac.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/components/802_15_4_RF/atmel-rf-driver/source/at24mac.cpp Wed Mar 13 11:03:24 2019 +0000 @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2016-2016 ARM Limited. All rights reserved. + * SPDX-License-Identifier: Apache-2.0 + * Licensed under the Apache License, Version 2.0 (the License); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an AS IS BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "at24mac.h" + +#if DEVICE_I2C + +/* Device addressing */ +#define AT24MAC_EEPROM_ADDRESS (0x0A<<4) +#define AT24MAC_RW_PROTECT_ADDRESS (0x06<<4) +#define AT24MAC_SERIAL_ADDRESS (0x0B<<4) + +/* Known memory blocks */ +#define AT24MAC_SERIAL_OFFSET (0x80) +#define AT24MAC_EUI64_OFFSET (0x98) +#define AT24MAC_EUI48_OFFSET (0x9A) + +#define SERIAL_LEN 16 +#define EUI64_LEN 8 +#define EUI48_LEN 6 + +AT24Mac::I2CReset::I2CReset(PinName sda, PinName scl) +{ + mbed::DigitalInOut pin_sda(sda, PIN_OUTPUT, PullUp, 1); + mbed::DigitalInOut pin_scl(scl, PIN_OUTPUT, PullUp, 0); + //generate 9 clocks for worst-case scenario + for (int i = 0; i < 10; ++i) { + pin_scl = 1; + wait_us(5); + pin_scl = 0; + wait_us(5); + } + //generate a STOP condition + pin_sda = 0; + wait_us(5); + pin_scl = 1; + wait_us(5); + pin_sda = 1; + wait_us(5); +} + +/*I2C needs to be reset before constructing the I2C object (in case I2C is stuck) + because they use the same pins, therefore i2c_reset has to be before _i2c + in the initializer list*/ +AT24Mac::AT24Mac(PinName sda, PinName scl) : i2c_reset(sda, scl), _i2c(sda, scl) +{ + // Do nothing +} + +int AT24Mac::read_serial(void *buf) +{ + char offset = AT24MAC_SERIAL_OFFSET; + if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) + return -1; //No ACK + return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, SERIAL_LEN); +} + +int AT24Mac::read_eui64(void *buf) +{ + char offset = AT24MAC_EUI64_OFFSET; + if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) + return -1; //No ACK + return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, EUI64_LEN); +} + +int AT24Mac::read_eui48(void *buf) +{ + char offset = AT24MAC_EUI48_OFFSET; + if (_i2c.write(AT24MAC_SERIAL_ADDRESS, &offset, 1, true)) + return -1; //No ACK + return _i2c.read(AT24MAC_SERIAL_ADDRESS, (char*)buf, EUI48_LEN); +} + +#endif /* DEVICE_I2C */