tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KLXX/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
  19 void pin_function(PinName pin, int function) {
  20     MBED_ASSERT(pin != (PinName)NC);
  21
  22     uint32_t port_n = (uint32_t)pin >> PORT_SHIFT;
  23     uint32_t pin_n  = (uint32_t)(pin & 0x7C) >> 2;
  24
  25     SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port_n);
  26     __IO uint32_t* pin_pcr = &(((PORT_Type *)(PORTA_BASE + 0x1000 * port_n)))->PCR[pin_n];
  27
  28     // pin mux bits: [10:8] -> 11100000000 = (0x700)
  29     *pin_pcr = (*pin_pcr & ~0x700) | (function << 8);
  30 }
  31
  32 void pin_mode(PinName pin, PinMode mode) {
  33     MBED_ASSERT(pin != (PinName)NC);
  34
  35     __IO uint32_t* pin_pcr = (__IO uint32_t*)(PORTA_BASE + pin);
  36
  37     // pin pullup bits: [1:0] -> 11 = (0x3)
  38     *pin_pcr = (*pin_pcr & ~0x3) | mode;
  39 }