tmk_core/tool/mbed/mbed-sdk/libraries/mbed/hal/i2c_api.h

   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 #ifndef MBED_I2C_API_H
  17 #define MBED_I2C_API_H
  18
  19 #include "device.h"
  20
  21 #if DEVICE_I2C
  22
  23 #ifdef __cplusplus
  24 extern "C" {
  25 #endif
  26
  27 typedef struct i2c_s i2c_t;
  28
  29 enum {
  30   I2C_ERROR_NO_SLAVE = -1,
  31   I2C_ERROR_BUS_BUSY = -2
  32 };
  33
  34 void i2c_init         (i2c_t *obj, PinName sda, PinName scl);
  35 void i2c_frequency    (i2c_t *obj, int hz);
  36 int  i2c_start        (i2c_t *obj);
  37 int  i2c_stop         (i2c_t *obj);
  38 int  i2c_read         (i2c_t *obj, int address, char *data, int length, int stop);
  39 int  i2c_write        (i2c_t *obj, int address, const char *data, int length, int stop);
  40 void i2c_reset        (i2c_t *obj);
  41 int  i2c_byte_read    (i2c_t *obj, int last);
  42 int  i2c_byte_write   (i2c_t *obj, int data);
  43
  44 #if DEVICE_I2CSLAVE
  45 void i2c_slave_mode   (i2c_t *obj, int enable_slave);
  46 int  i2c_slave_receive(i2c_t *obj);
  47 int  i2c_slave_read   (i2c_t *obj, char *data, int length);
  48 int  i2c_slave_write  (i2c_t *obj, const char *data, int length);
  49 int  i2c_slave_byte_read(i2c_t *obj, int last);
  50 int  i2c_slave_byte_write(i2c_t *obj, int data);
  51 void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
  52 #endif
  53
  54 #ifdef __cplusplus
  55 }
  56 #endif
  57
  58 #endif
  59
  60 #endif