mirror of https://github.com/ARMmbed/mbed-os.git
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/***************************************************************************//**
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* @file pinmap_function.c
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
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*******************************************************************************
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "pinmap_function.h"
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#include "PinNames.h"
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#include "mbed_error.h"
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/**
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* Get the value of the function field for a pin in a pinmap
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* @param pin A pin
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* @param map A pinmap for a given peripheral
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* @return Content of function field in pinmap for the given pin
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*/
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uint32_t pinmap_get_function_field(PinName pin, const PinMap *map)
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{
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while (map->pin != NC) {
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if (map->pin == pin) {
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return map->function;
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}
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map++;
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}
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return (uint32_t) NC;
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}
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/**
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* Get the location a given peripheral is routed to from pin
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* This is stored in the function field of the pinmap
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* @param pin The pin
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* @param map Pinmap for the given peripheral
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* @return uint32 describing location (0, 1, 2, ...)
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*/
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uint32_t pin_location(PinName pin, const PinMap *map)
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{
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if (pin == (PinName) NC) {
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return (uint32_t) NC;
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}
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uint32_t location = pinmap_get_function_field(pin, map);
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if ((uint32_t) NC == location) { // no mapping available
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error("location not found for pin");
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}
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return location;
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}
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