Lancaster University's (short term!) clone of mbed-src for micro:bit. This is a copy of the github branch https://github.com/lancaster-university/mbed-classic
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Diff: cpp/I2C.cpp
- Revision:
- 2:143cac498751
- Parent:
- 0:fd0d7bdfcdc2
diff -r 62685faffa05 -r 143cac498751 cpp/I2C.cpp --- a/cpp/I2C.cpp Thu Nov 29 15:41:14 2012 +0000 +++ b/cpp/I2C.cpp Mon Feb 18 11:44:18 2013 +0000 @@ -1,23 +1,17 @@ /* mbed Microcontroller Library - * Copyright (c) 2006-2012 ARM Limited + * Copyright (c) 2006-2013 ARM Limited * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: + * 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 * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. + * http://www.apache.org/licenses/LICENSE-2.0 * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. + * 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" @@ -31,17 +25,17 @@ // 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; } @@ -55,11 +49,11 @@ // write - Master Transmitter Mode int I2C::write(int address, const char* data, int length, bool repeated) { - aquire(); - + aquire(); + int stop = (repeated) ? 0 : 1; int retval = i2c_write(&_i2c, address, data, length, stop); - + return retval; } @@ -70,10 +64,10 @@ // 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; }