mirror of https://github.com/ARMmbed/mbed-os.git
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2019 ARM Limited
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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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#include <stdint.h>
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#include "port_api.h"
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#include "gpio_msp432.h"
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#if DEVICE_PORTIN || DEVICE_PORTOUT
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/** Get the pin name from the port's pin number
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*
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* @param port The port name
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* @param pin_n The pin number within the specified port
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* @return The pin name for the port's pin number
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*/
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PinName port_pin(PortName port, int pin_n)
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{
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return (PinName)((port << 4) + pin_n);
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}
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/** Initilize the port
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*
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* @param obj The port object to initialize
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* @param port The port name
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* @param mask The bitmask to identify which bits in the port should be included (0 - ignore)
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* @param dir The port direction
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*/
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void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
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{
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/* Initialize the port object */
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obj->port = port;
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obj->mask = mask;
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obj->port_in = PORT_REG(port_base[port], REG_IN);
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obj->port_out = PORT_REG(port_base[port], REG_OUT);
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obj->port_dir = PORT_REG(port_base[port], REG_DIR);
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port_dir(obj, dir);
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}
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/** Set the input port mode
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*
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* @param obj The port object
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* @param mode THe port mode to be set
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*/
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void port_mode(port_t *obj, PinMode mode)
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{
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uint32_t i;
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for (i = 0; i < 8; i++) {
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/* Is pin used ? */
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if (obj->mask & (1 << i)) {
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pin_mode(port_pin(obj->port, i), mode);
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}
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}
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}
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/** Set port direction (in/out)
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*
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* @param obj The port object
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* @param dir The port direction to be set
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*/
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void port_dir(port_t *obj, PinDirection dir)
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{
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if (dir == PIN_OUTPUT) {
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*obj->port_dir |= (obj->mask);
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} else {
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*obj->port_dir &= ~(obj->mask);
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}
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}
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/** Write value to the port
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*
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* @param obj The port object
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* @param value The value to be set
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*/
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void port_write(port_t *obj, int value)
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{
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*obj->port_out = (*obj->port_out & ~obj->mask) | (value & obj->mask);
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}
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/** Read the current value on the port
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*
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* @param obj The port object
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* @return An integer with each bit corresponding to an associated port pin setting
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*/
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int port_read(port_t *obj)
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{
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return *obj->port_in & obj->mask;
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}
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#endif /* DEVICE_PORTIN || DEVICE_PORTOUT */
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