<commit_before>/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 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 "gpio_api.h"
#include "pinmap.h"

uint32_t gpio_set(PinName pin) {
    // PIO default value of following ports are not same as others
    int f = ((pin == P0_0 ) || // RESET
             (pin == P0_10) || // SWCLK
             (pin == P0_11) || // R
             (pin == P1_0 ) || // R
             (pin == P1_1 ) || // R
             (pin == P1_2 ) || // R
             (pin == P1_3 )) ? // 
             (1) : (0);
    
    pin_function(pin, f);
    return ((pin & 0x0F00) >> 8);
}

void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
    if(pin == NC) return;

    obj->pin = pin;
    LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000)));

    obj->reg_mask_read = &port_reg->MASKED_ACCESS[gpio_set(pin) + 1];
    obj->reg_dir       = &port_reg->DIR;
    obj->reg_write     = &port_reg->DATA;
    
    gpio_dir(obj, direction);
    
    switch (direction) {
        case PIN_OUTPUT: pin_mode(pin, PullNone); break;
        case PIN_INPUT : pin_mode(pin, PullDown); break;
    }
}

void gpio_mode(gpio_t *obj, PinMode mode) {
    pin_mode(obj->pin, mode);
}

void gpio_dir(gpio_t *obj, PinDirection direction) {
    int pin_number = ((obj->pin & 0x0F00) >> 8);
    switch (direction) {
        case PIN_INPUT : *obj->reg_dir &= ~(1 << pin_number); break;
        case PIN_OUTPUT: *obj->reg_dir |=  (1 << pin_number); break;
    }
}
<commit_msg>Fix MASKED_ACCESS bug in gpio_init, now same as LPC11xx (Also use PIN_SHIFT instead of magic number 8 in gpio_set)<commit_after>/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 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 "gpio_api.h"
#include "pinmap.h"

uint32_t gpio_set(PinName pin) {
    // PIO default value of following ports are not same as others
    int f = ((pin == P0_0 ) || // RESET
             (pin == P0_10) || // SWCLK
             (pin == P0_11) || // R
             (pin == P1_0 ) || // R
             (pin == P1_1 ) || // R
             (pin == P1_2 ) || // R
             (pin == P1_3 )) ? // 
             (1) : (0);
    
    pin_function(pin, f);
    return ((pin & 0x0F00) >> PIN_SHIFT);
}

void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) {
    if(pin == NC) return;

    obj->pin = pin;
    LPC_GPIO_TypeDef *port_reg = ((LPC_GPIO_TypeDef *) (LPC_GPIO0_BASE + (((pin & 0xF000) >> PORT_SHIFT) * 0x10000)));
    
    obj->reg_mask_read = &port_reg->MASKED_ACCESS[1 << gpio_set(pin)];
    obj->reg_dir       = &port_reg->DIR;
    obj->reg_write     = &port_reg->DATA;
    
    gpio_dir(obj, direction);
    
    switch (direction) {
        case PIN_OUTPUT: pin_mode(pin, PullNone); break;
        case PIN_INPUT : pin_mode(pin, PullDown); break;
    }
}

void gpio_mode(gpio_t *obj, PinMode mode) {
    pin_mode(obj->pin, mode);
}

void gpio_dir(gpio_t *obj, PinDirection direction) {
    int pin_number = ((obj->pin & 0x0F00) >> 8);
    switch (direction) {
        case PIN_INPUT : *obj->reg_dir &= ~(1 << pin_number); break;
        case PIN_OUTPUT: *obj->reg_dir |=  (1 << pin_number); break;
    }
}

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