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 {
00021     if (pin == NC) {
00022         return;
00023     }
00024 
00025     while (map->pin != NC) {
00026         if (map->pin == pin) {
00027             pin_function(pin, map->function);
00028 
00029             pin_mode(pin, PullNone);
00030             return;
00031         }
00032         map++;
00033     }
00034     MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_PINMAP_INVALID), "could not pinout", pin);
00035 }
00036 
00037 uint32_t pinmap_merge(uint32_t a, uint32_t b)
00038 {
00039     // both are the same (inc both NC)
00040     if (a == b) {
00041         return a;
00042     }
00043 
00044     // one (or both) is not connected
00045     if (a == (uint32_t)NC) {
00046         return b;
00047     }
00048     if (b == (uint32_t)NC) {
00049         return a;
00050     }
00051 
00052     // mis-match error case
00053     MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_PINMAP_INVALID), "pinmap mis-match", a);
00054     return (uint32_t)NC;
00055 }
00056 
00057 uint32_t pinmap_find_peripheral(PinName pin, const PinMap *map)
00058 {
00059     while (map->pin != NC) {
00060         if (map->pin == pin) {
00061             return map->peripheral;
00062         }
00063         map++;
00064     }
00065     return (uint32_t)NC;
00066 }
00067 
00068 uint32_t pinmap_peripheral(PinName pin, const PinMap *map)
00069 {
00070     uint32_t peripheral = (uint32_t)NC;
00071 
00072     if (pin == (PinName)NC) {
00073         return (uint32_t)NC;
00074     }
00075     peripheral = pinmap_find_peripheral(pin, map);
00076     if ((uint32_t)NC == peripheral) { // no mapping available
00077         MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_PINMAP_INVALID), "pinmap not found for peripheral", peripheral);
00078     }
00079     return peripheral;
00080 }
00081 
00082 uint32_t pinmap_find_function(PinName pin, const PinMap *map)
00083 {
00084     while (map->pin != NC) {
00085         if (map->pin == pin) {
00086             return map->function;
00087         }
00088         map++;
00089     }
00090     return (uint32_t)NC;
00091 }
00092 
00093 uint32_t pinmap_function(PinName pin, const PinMap *map)
00094 {
00095     uint32_t function = (uint32_t)NC;
00096 
00097     if (pin == (PinName)NC) {
00098         return (uint32_t)NC;
00099     }
00100     function = pinmap_find_function(pin, map);
00101     if ((uint32_t)NC == function) { // no mapping available
00102         MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_PINMAP_INVALID), "pinmap not found for function", function);
00103     }
00104     return function;
00105 }