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157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2018 ARM Limited and affiliates.
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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");
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* you may 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,
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* WITHOUT 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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#ifndef PINMAP_EX_H
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#define PINMAP_EX_H
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#include "PinNames.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Data structure for pre-allocated I2C instances. */
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typedef struct {
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PinName sda;
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PinName scl;
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int instance;
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} PinMapI2C;
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extern const PinMapI2C PinMap_I2C[];
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/* Data structure for pre-allocated SPI instances. */
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typedef struct {
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PinName mosi;
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PinName miso;
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PinName clk;
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int instance;
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} PinMapSPI;
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extern const PinMapSPI PinMap_SPI[];
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/* Data structure for pre-allocated PWM instances. */
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typedef struct {
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PinName pwm;
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int instance;
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} PinMapPWM;
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extern const PinMapPWM PinMap_PWM[];
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/* Data structure for pre-allocated UART instances. */
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typedef struct {
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PinName tx;
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PinName rx;
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int instance;
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} PinMapUART;
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extern const PinMapUART PinMap_UART[];
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/**
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* @brief Find hardware instance for the provided I2C pins.
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*
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* The function will search the PeripheralPin map for a pre-allocated
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* assignment. If none is found the allocation map will be searched
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* to see if the same pins have been assigned an instance before.
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*
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* If no assignement is found and there is an empty slot left in the
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* map, the pins are stored in the map and the hardware instance is
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* returned.
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*
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* If no free instances are available, the default instance is returned.
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*
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* @param[in] sda sda pin.
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* @param[in] scl scl pin.
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*
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* @return Hardware instance associated with provided pins.
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*/
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int pin_instance_i2c(PinName sda, PinName scl);
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/**
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* @brief Find hardware instance for the provided SPI pins.
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*
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* The function will search the PeripheralPin map for a pre-allocated
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* assignment. If none is found the allocation map will be searched
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* to see if the same pins have been assigned an instance before.
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*
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* If no assignement is found and there is an empty slot left in the
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* map, the pins are stored in the map and the hardware instance is
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* returned.
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*
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* If no free instances are available, the default instance is returned.
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*
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* @param[in] mosi mosi pin.
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* @param[in] miso miso pin.
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* @param[in] clk clk pin.
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*
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* @return Hardware instance associated with provided pins.
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*/
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int pin_instance_spi(PinName mosi, PinName miso, PinName clk);
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/**
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* @brief Find hardware instance for the provided PWM pins.
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*
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* The function will search the PeripheralPin map for a pre-allocated
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* assignment. If none is found the allocation map will be searched
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* to see if the same pins have been assigned an instance before.
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*
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* If no assignement is found and there is an empty slot left in the
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* map, the pins are stored in the map and the hardware instance is
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* returned.
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*
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* If no free instances are available, the default instance is returned.
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*
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* @param[in] pwm pwm pin.
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*
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* @return Hardware instance associated with provided pins.
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*/
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int pin_instance_pwm(PinName pwm);
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/**
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* Brief Find hardware instance for the provided PWM pin and free it
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*
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* Parameter pwm pwm pin.
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*
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* Return Nothing
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*/
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void pin_instance_pwm_free(PinName pwm);
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/**
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* @brief Find hardware instance for the provided UART pins.
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*
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* The function will search the PeripheralPin map for a pre-allocated
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* assignment. If none is found the allocation map will be searched
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* to see if the same pins have been assigned an instance before.
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*
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* If no assignement is found and there is an empty slot left in the
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* map, the pins are stored in the map and the hardware instance is
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* returned.
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*
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* If no free instances are available, the default instance is returned.
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*
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* @param[in] tx tx pin.
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* @param[in] rx rx pin.
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*
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* @return Hardware instance associated with provided pins.
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*/
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int pin_instance_uart(PinName tx, PinName rx);
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#ifdef __cplusplus
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}
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#endif
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#endif // PINMAP_EX_H
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