File content as of revision 189:f392fc9709a3:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2018 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "port_api.h"
#include "pinmap.h"
#include "gpio_api.h"

extern PinName gpio_pinname(int pin_n);

PinName port_pin(PortName port, int pin_n)
{
    return (PinName)((port << PORT_SHIFT) | pin_n);
}

void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
{
    uint32_t i;

    obj->port = port;
    obj->mask = mask;

    obj->reg_out = &RDA_GPIO->DOUT;
    obj->reg_in  = &RDA_GPIO->DIN;
    obj->reg_dir = &RDA_GPIO->DIR;

    // The mode is set per pin: reuse gpio logic
    for (i = 0; i < 32; i++) {
        if (obj->mask & (1 << i)) {
            // For RDA5991H, port0,1,4,5 is about IOMUX, not GPIO number, cannot use port_pin here
            //gpio_set(port_pin(obj->port, i));
            gpio_set(gpio_pinname(i));
        }
    }

    port_dir(obj, dir);
}

void port_mode(port_t *obj, PinMode mode)
{
    uint32_t i;
    // The mode is set per pin: reuse pinmap logic
    for (i = 0; i < 32; i++) {
        if (obj->mask & (1 <<i )) {
            pin_mode(port_pin(obj->port, i), mode);
        }
    }
}

void port_dir(port_t *obj, PinDirection dir)
{
    switch (dir) {
        case PIN_INPUT :
            *obj->reg_dir |=  obj->mask;
            break;
        case PIN_OUTPUT:
            *obj->reg_dir &= ~obj->mask;
            break;
    }
}

void port_write(port_t *obj, int value)
{
    *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask);
}

int port_read(port_t *obj)
{
    return (*obj->reg_in & obj->mask);
}