1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2013 ARM Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #include "mbed_assert.h"
20 uint32_t gpio_set(PinName pin) {
21 MBED_ASSERT(pin != (PinName)NC);
23 return (1 << ((int)pin & 0x1F));
26 void gpio_init(gpio_t *obj, PinName pin) {
28 if (pin == (PinName)NC)
31 obj->mask = gpio_set(pin);
32 LPC_GPIO_TypeDef *port_reg = (LPC_GPIO_TypeDef *)((int)pin & ~0x1F);
33 obj->reg_set = &port_reg->FIOSET;
34 obj->reg_clr = &port_reg->FIOCLR;
35 obj->reg_in = &port_reg->FIOPIN;
36 obj->reg_dir = &port_reg->FIODIR;
39 void gpio_mode(gpio_t *obj, PinMode mode) {
40 pin_mode(obj->pin, mode);
43 void gpio_dir(gpio_t *obj, PinDirection direction) {
44 MBED_ASSERT(obj->pin != (PinName)NC);
47 *obj->reg_dir &= ~obj->mask;
50 *obj->reg_dir |= obj->mask;