tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/pinmap_common.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 "pinmap.h"
  17 #include "mbed_error.h"
  18
  19 void pinmap_pinout(PinName pin, const PinMap *map) {
  20     if (pin == NC)
  21         return;
  22
  23     while (map->pin != NC) {
  24         if (map->pin == pin) {
  25             pin_function(pin, map->function);
  26
  27             pin_mode(pin, PullNone);
  28             return;
  29         }
  30         map++;
  31     }
  32     error("could not pinout");
  33 }
  34
  35 uint32_t pinmap_merge(uint32_t a, uint32_t b) {
  36     // both are the same (inc both NC)
  37     if (a == b)
  38         return a;
  39
  40     // one (or both) is not connected
  41     if (a == (uint32_t)NC)
  42         return b;
  43     if (b == (uint32_t)NC)
  44         return a;
  45
  46     // mis-match error case
  47     error("pinmap mis-match");
  48     return (uint32_t)NC;
  49 }
  50
  51 uint32_t pinmap_find_peripheral(PinName pin, const PinMap* map) {
  52     while (map->pin != NC) {
  53         if (map->pin == pin)
  54             return map->peripheral;
  55         map++;
  56     }
  57     return (uint32_t)NC;
  58 }
  59
  60 uint32_t pinmap_peripheral(PinName pin, const PinMap* map) {
  61     uint32_t peripheral = (uint32_t)NC;
  62
  63     if (pin == (PinName)NC)
  64         return (uint32_t)NC;
  65     peripheral = pinmap_find_peripheral(pin, map);
  66     if ((uint32_t)NC == peripheral) // no mapping available
  67         error("pinmap not found for peripheral");
  68     return peripheral;
  69 }
  70
  71 uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
  72     while (map->pin != NC) {
  73         if (map->pin == pin)
  74             return map->function;
  75         map++;
  76     }
  77     return (uint32_t)NC;
  78 }
  79
  80 uint32_t pinmap_function(PinName pin, const PinMap* map) {
  81     uint32_t function = (uint32_t)NC;
  82
  83     if (pin == (PinName)NC)
  84         return (uint32_t)NC;
  85     function = pinmap_find_function(pin, map);
  86     if ((uint32_t)NC == function) // no mapping available
  87         error("pinmap not found for function");
  88     return function;
  89 }