Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

hal/mbed_pinmap_common.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "hal/pinmap.h"
elessair 0:f269e3021894 17 #include "platform/mbed_error.h"
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19 void pinmap_pinout(PinName pin, const PinMap *map) {
elessair 0:f269e3021894 20 if (pin == NC)
elessair 0:f269e3021894 21 return;
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 while (map->pin != NC) {
elessair 0:f269e3021894 24 if (map->pin == pin) {
elessair 0:f269e3021894 25 pin_function(pin, map->function);
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 pin_mode(pin, PullNone);
elessair 0:f269e3021894 28 return;
elessair 0:f269e3021894 29 }
elessair 0:f269e3021894 30 map++;
elessair 0:f269e3021894 31 }
elessair 0:f269e3021894 32 error("could not pinout");
elessair 0:f269e3021894 33 }
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 uint32_t pinmap_merge(uint32_t a, uint32_t b) {
elessair 0:f269e3021894 36 // both are the same (inc both NC)
elessair 0:f269e3021894 37 if (a == b)
elessair 0:f269e3021894 38 return a;
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 // one (or both) is not connected
elessair 0:f269e3021894 41 if (a == (uint32_t)NC)
elessair 0:f269e3021894 42 return b;
elessair 0:f269e3021894 43 if (b == (uint32_t)NC)
elessair 0:f269e3021894 44 return a;
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 // mis-match error case
elessair 0:f269e3021894 47 error("pinmap mis-match");
elessair 0:f269e3021894 48 return (uint32_t)NC;
elessair 0:f269e3021894 49 }
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 uint32_t pinmap_find_peripheral(PinName pin, const PinMap* map) {
elessair 0:f269e3021894 52 while (map->pin != NC) {
elessair 0:f269e3021894 53 if (map->pin == pin)
elessair 0:f269e3021894 54 return map->peripheral;
elessair 0:f269e3021894 55 map++;
elessair 0:f269e3021894 56 }
elessair 0:f269e3021894 57 return (uint32_t)NC;
elessair 0:f269e3021894 58 }
elessair 0:f269e3021894 59
elessair 0:f269e3021894 60 uint32_t pinmap_peripheral(PinName pin, const PinMap* map) {
elessair 0:f269e3021894 61 uint32_t peripheral = (uint32_t)NC;
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 if (pin == (PinName)NC)
elessair 0:f269e3021894 64 return (uint32_t)NC;
elessair 0:f269e3021894 65 peripheral = pinmap_find_peripheral(pin, map);
elessair 0:f269e3021894 66 if ((uint32_t)NC == peripheral) // no mapping available
elessair 0:f269e3021894 67 error("pinmap not found for peripheral");
elessair 0:f269e3021894 68 return peripheral;
elessair 0:f269e3021894 69 }
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
elessair 0:f269e3021894 72 while (map->pin != NC) {
elessair 0:f269e3021894 73 if (map->pin == pin)
elessair 0:f269e3021894 74 return map->function;
elessair 0:f269e3021894 75 map++;
elessair 0:f269e3021894 76 }
elessair 0:f269e3021894 77 return (uint32_t)NC;
elessair 0:f269e3021894 78 }
elessair 0:f269e3021894 79
elessair 0:f269e3021894 80 uint32_t pinmap_function(PinName pin, const PinMap* map) {
elessair 0:f269e3021894 81 uint32_t function = (uint32_t)NC;
elessair 0:f269e3021894 82
elessair 0:f269e3021894 83 if (pin == (PinName)NC)
elessair 0:f269e3021894 84 return (uint32_t)NC;
elessair 0:f269e3021894 85 function = pinmap_find_function(pin, map);
elessair 0:f269e3021894 86 if ((uint32_t)NC == function) // no mapping available
elessair 0:f269e3021894 87 error("pinmap not found for function");
elessair 0:f269e3021894 88 return function;
elessair 0:f269e3021894 89 }