mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
Diff: common/I2C.cpp
- Revision:
- 13:0645d8841f51
- Parent:
- 10:3bc89ef62ce7
- Child:
- 212:34d62c0b2af6
diff -r 5fa2273de5db -r 0645d8841f51 common/I2C.cpp --- a/common/I2C.cpp Wed Jul 24 11:11:21 2013 +0100 +++ b/common/I2C.cpp Mon Aug 05 14:12:34 2013 +0300 @@ -1,92 +1,92 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * 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 "I2C.h" - -#if DEVICE_I2C - -namespace mbed { - -I2C *I2C::_owner = NULL; - -I2C::I2C(PinName sda, PinName scl) { - // The init function also set the frequency to 100000 - i2c_init(&_i2c, sda, scl); - _hz = 100000; - - // Used to avoid unnecessary frequency updates - _owner = this; -} - -void I2C::frequency(int hz) { - _hz = hz; - - // We want to update the frequency even if we are already the bus owners - i2c_frequency(&_i2c, _hz); - - // Updating the frequency of the bus we become the owners of it - _owner = this; -} - -void I2C::aquire() { - if (_owner != this) { - i2c_frequency(&_i2c, _hz); - _owner = this; - } -} - -// write - Master Transmitter Mode -int I2C::write(int address, const char* data, int length, bool repeated) { - aquire(); - - int stop = (repeated) ? 0 : 1; - int retval = i2c_write(&_i2c, address, data, length, stop); - - return retval; -} - -int I2C::write(int data) { - return i2c_byte_write(&_i2c, data); -} - -// read - Master Reciever Mode -int I2C::read(int address, char* data, int length, bool repeated) { - aquire(); - - int stop = (repeated) ? 0 : 1; - int retval = i2c_read(&_i2c, address, data, length, stop); - - return retval; -} - -int I2C::read(int ack) { - if (ack) { - return i2c_byte_read(&_i2c, 0); - } else { - return i2c_byte_read(&_i2c, 1); - } -} - -void I2C::start(void) { - i2c_start(&_i2c); -} - -void I2C::stop(void) { - i2c_stop(&_i2c); -} - -} // namespace mbed - -#endif +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * 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 "I2C.h" + +#if DEVICE_I2C + +namespace mbed { + +I2C *I2C::_owner = NULL; + +I2C::I2C(PinName sda, PinName scl) { + // The init function also set the frequency to 100000 + i2c_init(&_i2c, sda, scl); + _hz = 100000; + + // Used to avoid unnecessary frequency updates + _owner = this; +} + +void I2C::frequency(int hz) { + _hz = hz; + + // We want to update the frequency even if we are already the bus owners + i2c_frequency(&_i2c, _hz); + + // Updating the frequency of the bus we become the owners of it + _owner = this; +} + +void I2C::aquire() { + if (_owner != this) { + i2c_frequency(&_i2c, _hz); + _owner = this; + } +} + +// write - Master Transmitter Mode +int I2C::write(int address, const char* data, int length, bool repeated) { + aquire(); + + int stop = (repeated) ? 0 : 1; + int written = i2c_write(&_i2c, address, data, length, stop); + + return length != written; +} + +int I2C::write(int data) { + return i2c_byte_write(&_i2c, data); +} + +// read - Master Reciever Mode +int I2C::read(int address, char* data, int length, bool repeated) { + aquire(); + + int stop = (repeated) ? 0 : 1; + int read = i2c_read(&_i2c, address, data, length, stop); + + return length != read; +} + +int I2C::read(int ack) { + if (ack) { + return i2c_byte_read(&_i2c, 0); + } else { + return i2c_byte_read(&_i2c, 1); + } +} + +void I2C::start(void) { + i2c_start(&_i2c); +} + +void I2C::stop(void) { + i2c_stop(&_i2c); +} + +} // namespace mbed + +#endif