tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/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 void pin_function(PinName pin, int function) {
  21 }
  22
  23 void pin_mode(PinName pin, PinMode mode) {
  24     MBED_ASSERT(pin != (PinName)NC);
  25
  26     if ((pin == P0_22) || (pin == P0_23)) {
  27         // The true open-drain pins PIO0_22 and PIO0_23 can be configured for different I2C-bus speeds.
  28         return;
  29     }
  30
  31     __IO uint32_t *reg = (__IO uint32_t*)(LPC_IOCON_BASE + (pin * 4));
  32
  33     if (mode == OpenDrain) {
  34         *reg |= (1 << 10);
  35     } else {
  36         uint32_t tmp = *reg;
  37         tmp &= ~(0x3 << 3);
  38         tmp |= (mode & 0x3) << 3;
  39         *reg = tmp;
  40     }
  41 }