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git.gir.st - tmk_keyboard.git/blob - tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC176X/gpio_api.c
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
;