tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC82X/pinmap.c

   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 "mbed_assert.h"
  17 #include "pinmap.h"
  18 #include "mbed_error.h"
  19
  20
  21 void pin_function(PinName pin, int function)
  22 {
  23     // do nothing
  24     return;
  25 }
  26
  27 void pin_mode(PinName pin, PinMode mode)
  28 {
  29     MBED_ASSERT(pin != (PinName)NC);
  30
  31     if ((pin == P0_10) || (pin == P0_11)) {
  32         // True open-drain pins can be configured for different I2C-bus speeds
  33         return;
  34     }
  35
  36     __IO uint32_t *reg = (uint32_t *)(LPC_IOCON_BASE + (pin & 0xFF));
  37
  38     if (mode == OpenDrain) {
  39         *reg |= (1 << 10);
  40     } else {
  41         uint32_t tmp = *reg;
  42         tmp &= ~(0x3 << 3);
  43         tmp |= (mode & 0x3) << 3;
  44         *reg = tmp;
  45     }
  46 }