tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC43XX/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  * Ported to NXP LPC43XX by Micromint USA <support@micromint.com>
  17  */
  18 #include "mbed_assert.h"
  19 #include "pinmap.h"
  20 #include "mbed_error.h"
  21
  22 void pin_function(PinName pin, int function) {
  23     MBED_ASSERT(pin != (PinName)NC);
  24
  25     __IO uint32_t *reg = (__IO uint32_t*) MBED_SCU_REG(pin);
  26
  27     // Set pin function
  28     *reg = function;
  29 }
  30
  31 void pin_mode(PinName pin, PinMode mode) {
  32     MBED_ASSERT(pin != (PinName)NC); // && (mode != OpenDrain));
  33
  34     __IO uint32_t *reg = (__IO uint32_t*) MBED_SCU_REG(pin);
  35     uint32_t tmp = *reg;
  36
  37     // pin mode bits: [4:3] -> 11000 = (0x3 << 3)
  38     tmp &= ~(0x3 << 3);
  39     tmp |= (mode & 0x3) << 3;
  40
  41     *reg = tmp;
  42 }