mbed_pinmap_common.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include "hal/pinmap.h"
00017 #include "platform/mbed_error.h"
00018 
00019 void pinmap_pinout(PinName pin, const PinMap *map) {
00020     if (pin == NC)
00021         return;
00022 
00023     while (map->pin != NC) {
00024         if (map->pin == pin) {
00025             pin_function(pin, map->function);
00026 
00027             pin_mode(pin, PullNone);
00028             return;
00029         }
00030         map++;
00031     }
00032     error("could not pinout");
00033 }
00034 
00035 uint32_t pinmap_merge(uint32_t a, uint32_t b) {
00036     // both are the same (inc both NC)
00037     if (a == b)
00038         return a;
00039 
00040     // one (or both) is not connected
00041     if (a == (uint32_t)NC)
00042         return b;
00043     if (b == (uint32_t)NC)
00044         return a;
00045 
00046     // mis-match error case
00047     error("pinmap mis-match");
00048     return (uint32_t)NC;
00049 }
00050 
00051 uint32_t pinmap_find_peripheral(PinName pin, const PinMap* map) {
00052     while (map->pin != NC) {
00053         if (map->pin == pin)
00054             return map->peripheral;
00055         map++;
00056     }
00057     return (uint32_t)NC;
00058 }
00059 
00060 uint32_t pinmap_peripheral(PinName pin, const PinMap* map) {
00061     uint32_t peripheral = (uint32_t)NC;
00062 
00063     if (pin == (PinName)NC)
00064         return (uint32_t)NC;
00065     peripheral = pinmap_find_peripheral(pin, map);
00066     if ((uint32_t)NC == peripheral) // no mapping available
00067         error("pinmap not found for peripheral");
00068     return peripheral;
00069 }
00070 
00071 uint32_t pinmap_find_function(PinName pin, const PinMap* map) {
00072     while (map->pin != NC) {
00073         if (map->pin == pin)
00074             return map->function;
00075         map++;
00076     }
00077     return (uint32_t)NC;
00078 }
00079 
00080 uint32_t pinmap_function(PinName pin, const PinMap* map) {
00081     uint32_t function = (uint32_t)NC;
00082 
00083     if (pin == (PinName)NC)
00084         return (uint32_t)NC;
00085     function = pinmap_find_function(pin, map);
00086     if ((uint32_t)NC == function) // no mapping available
00087         error("pinmap not found for function");
00088     return function;
00089 }