text: /* 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 "mbed_assert.h"
  #include "pinmap.h"
  #include "error.h"
  
  __IO uint32_t* IOCON_REGISTERS[18] = {
          &LPC_IOCON->PIO0_0 , &LPC_IOCON->PIO0_1 , &LPC_IOCON->PIO0_2 ,
          &LPC_IOCON->PIO0_3 , &LPC_IOCON->PIO0_4 , &LPC_IOCON->PIO0_5 ,
          &LPC_IOCON->PIO0_6 , &LPC_IOCON->PIO0_7 , &LPC_IOCON->PIO0_8 ,
          &LPC_IOCON->PIO0_9 , &LPC_IOCON->PIO0_10, &LPC_IOCON->PIO0_11,
          &LPC_IOCON->PIO0_12, &LPC_IOCON->PIO0_13, &LPC_IOCON->PIO0_14,
          &LPC_IOCON->PIO0_15, &LPC_IOCON->PIO0_16, &LPC_IOCON->PIO0_17,
  };
  
  void pin_function(PinName pin, int function) {
      
  }
  
  void pin_mode(PinName pin, PinMode mode) {
      MBED_ASSERT(pin != (PinName)NC);
  
      if ((pin == 10) || (pin == 11)) {
          // True open-drain pins can be configured for different I2C-bus speeds
          return;
      }
      
      __IO uint32_t *reg = IOCON_REGISTERS[pin];
      
      if (mode == OpenDrain) {
          *reg |= (1 << 10);
      } else {
          uint32_t tmp = *reg;
          tmp &= ~(0x3 << 3);
          tmp |= (mode & 0x3) << 3;
          *reg = tmp;
      }
  }
  