tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC81X/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 __IO uint32_t* IOCON_REGISTERS[18] = {
  21         &LPC_IOCON->PIO0_0 , &LPC_IOCON->PIO0_1 , &LPC_IOCON->PIO0_2 ,
  22         &LPC_IOCON->PIO0_3 , &LPC_IOCON->PIO0_4 , &LPC_IOCON->PIO0_5 ,
  23         &LPC_IOCON->PIO0_6 , &LPC_IOCON->PIO0_7 , &LPC_IOCON->PIO0_8 ,
  24         &LPC_IOCON->PIO0_9 , &LPC_IOCON->PIO0_10, &LPC_IOCON->PIO0_11,
  25         &LPC_IOCON->PIO0_12, &LPC_IOCON->PIO0_13, &LPC_IOCON->PIO0_14,
  26         &LPC_IOCON->PIO0_15, &LPC_IOCON->PIO0_16, &LPC_IOCON->PIO0_17,
  27 };
  28
  29 void pin_function(PinName pin, int function) {
  30
  31 }
  32
  33 void pin_mode(PinName pin, PinMode mode) {
  34     MBED_ASSERT(pin != (PinName)NC);
  35
  36     if ((pin == 10) || (pin == 11)) {
  37         // True open-drain pins can be configured for different I2C-bus speeds
  38         return;
  39     }
  40
  41     __IO uint32_t *reg = IOCON_REGISTERS[pin];
  42
  43     if (mode == OpenDrain) {
  44         *reg |= (1 << 10);
  45     } else {
  46         uint32_t tmp = *reg;
  47         tmp &= ~(0x3 << 3);
  48         tmp |= (mode & 0x3) << 3;
  49         *reg = tmp;
  50     }
  51 }