pinmap.c

/*
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//Based on mbed-os/hal/mbed_pinmap_common.c

#include "pinmap.h"

void* pinmap_find_peripheral(PinName pin, const PinMap* map) {
  while (map->pin != NC) {
    if (map->pin == pin)
      return map->peripheral;
    map++;
  }
  return NP;
}

void* pinmap_peripheral(PinName pin, const PinMap* map) {
  void* peripheral = NP;

  if (pin != (PinName)NC) {
    peripheral = pinmap_find_peripheral(pin, map);
  }
  // else error("pinmap not found for peripheral");
  return peripheral;
}

uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
  while (map->pin != NC) {
    if (map->pin == pin)
      return map->function;
    map++;
  }
  return (uint32_t)NC;
}

uint32_t pinmap_function(PinName pin, const PinMap* map) {
  uint32_t function = (uint32_t)NC;

  if (pin != (PinName)NC) {
    function = pinmap_find_function(pin, map);
  }
  // else error("pinmap not found for function");
  return function;
}

bool pin_in_pinmap(PinName pin, const PinMap* map) {
  if (pin != (PinName)NC) {
    while (map->pin != NC) {
      if (map->pin == pin)
        return true;
      map++;
    }
  }
  return false;
}

// Merge peripherals
void* pinmap_merge_peripheral(void* a, void* b) {
    // both are the same (inc both NP)
    if (a == b)
        return a;

    // one (or both) is not set
    if (a == NP)
        return b;
    if (b == NP)
        return a;

    // mis-match error case
    // error("pinmap mis-match");
    return NP;
}

PinName pin_pinName(const PinMap* map) {
  if(map->pin != NC) {
    return map->pin;
  } else {
    return NC;
  }
}