tool/mbed/mbed-sdk/libraries/mbed/common/I2CSlave.cpp

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #include "I2CSlave.h"
  17
  18 #if DEVICE_I2CSLAVE
  19
  20 namespace mbed {
  21
  22 I2CSlave::I2CSlave(PinName sda, PinName scl) : _i2c() {
  23     i2c_init(&_i2c, sda, scl);
  24     i2c_frequency(&_i2c, 100000);
  25     i2c_slave_mode(&_i2c, 1);
  26 }
  27
  28 void I2CSlave::frequency(int hz) {
  29     i2c_frequency(&_i2c, hz);
  30 }
  31
  32 void I2CSlave::address(int address) {
  33     int addr = (address & 0xFF) | 1;
  34     i2c_slave_address(&_i2c, 0, addr, 0);
  35 }
  36
  37 int I2CSlave::receive(void) {
  38     return i2c_slave_receive(&_i2c);
  39 }
  40
  41 int I2CSlave::read(char *data, int length) {
  42     return i2c_slave_read(&_i2c, data, length) != length;
  43 }
  44
  45 int I2CSlave::read(void) {
  46     return i2c_byte_read(&_i2c, 0);
  47 }
  48
  49 int I2CSlave::write(const char *data, int length) {
  50     return i2c_slave_write(&_i2c, data, length) != length;
  51 }
  52
  53 int I2CSlave::write(int data) {
  54     return i2c_byte_write(&_i2c, data);
  55 }
  56
  57 void I2CSlave::stop(void) {
  58     i2c_stop(&_i2c);
  59 }
  60
  61 }
  62
  63 #endif