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/* 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 "mbed_assert.h"
#include "gpio_api.h"
#include "pinmap.h"
void gpio_init(gpio_t *obj, PinName pin)
{
obj->pin = pin;
if (pin == (PinName)NC) {
return;
}
obj->mask = (1ul << pin);
obj->reg_set = &NRF_GPIO->OUTSET;
obj->reg_clr = &NRF_GPIO->OUTCLR;
obj->reg_in = &NRF_GPIO->IN;
obj->reg_dir = &NRF_GPIO->DIR;
}
void gpio_mode(gpio_t *obj, PinMode mode)
{
pin_mode(obj->pin, mode);
}
void gpio_dir(gpio_t *obj, PinDirection direction)
{
MBED_ASSERT(obj->pin != (PinName)NC);
switch (direction) {
case PIN_INPUT:
NRF_GPIO->PIN_CNF[obj->pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
| (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
break;
case PIN_OUTPUT:
NRF_GPIO->PIN_CNF[obj->pin] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
| (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
| (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
break;
}
}