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git.gir.st - tmk_keyboard.git/blob - tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20XX/gpio_api.c
1 /* mbed Microcontroller Library
2 * Copyright (c) 2006-2015 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 << ((pin
& 0x7F) >> 2);
26 void gpio_init(gpio_t
*obj
, PinName pin
) {
28 if (pin
== (PinName
)NC
)
31 obj
->mask
= gpio_set(pin
);
33 unsigned int port
= (unsigned int)pin
>> PORT_SHIFT
;
35 GPIO_Type
*reg
= (GPIO_Type
*)(PTA_BASE
+ port
* 0x40);
36 obj
->reg_set
= ®
->PSOR
;
37 obj
->reg_clr
= ®
->PCOR
;
38 obj
->reg_in
= ®
->PDIR
;
39 obj
->reg_dir
= ®
->PDDR
;
42 void gpio_mode(gpio_t
*obj
, PinMode mode
) {
43 pin_mode(obj
->pin
, mode
);
46 void gpio_dir(gpio_t
*obj
, PinDirection direction
) {
47 MBED_ASSERT(obj
->pin
!= (PinName
)NC
);
50 *obj
->reg_dir
&= ~obj
->mask
;
53 *obj
->reg_dir
|= obj
->mask
;