Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NXP/TARGET_LPC13XX/gpio_api.c@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "mbed_assert.h"
elessair 0:f269e3021894 17 #include "gpio_api.h"
elessair 0:f269e3021894 18 #include "pinmap.h"
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 uint32_t gpio_set(PinName pin) {
elessair 0:f269e3021894 21 MBED_ASSERT(pin != (PinName)NC);
elessair 0:f269e3021894 22 int f = ((pin == P0_11) || (pin == P0_12) ||
elessair 0:f269e3021894 23 (pin == P0_13) || (pin == P0_14)) ? (1) : (0);
elessair 0:f269e3021894 24 pin_function(pin, f);
elessair 0:f269e3021894 25
elessair 0:f269e3021894 26 return (1 << ((int)pin & 0x1F));
elessair 0:f269e3021894 27 }
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 void gpio_init(gpio_t *obj, PinName pin) {
elessair 0:f269e3021894 30 obj->pin = pin;
elessair 0:f269e3021894 31 if (pin == (PinName)NC)
elessair 0:f269e3021894 32 return;
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 obj->mask = gpio_set(pin);
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 unsigned int port = (unsigned int)pin >> PORT_SHIFT;
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 obj->reg_set = &LPC_GPIO->SET[port];
elessair 0:f269e3021894 39 obj->reg_clr = &LPC_GPIO->CLR[port];
elessair 0:f269e3021894 40 obj->reg_in = &LPC_GPIO->PIN[port];
elessair 0:f269e3021894 41 obj->reg_dir = &LPC_GPIO->DIR[port];
elessair 0:f269e3021894 42 }
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 void gpio_mode(gpio_t *obj, PinMode mode) {
elessair 0:f269e3021894 45 pin_mode(obj->pin, mode);
elessair 0:f269e3021894 46 }
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 void gpio_dir(gpio_t *obj, PinDirection direction) {
elessair 0:f269e3021894 49 MBED_ASSERT(obj->pin != (PinName)NC);
elessair 0:f269e3021894 50 switch (direction) {
elessair 0:f269e3021894 51 case PIN_INPUT :
elessair 0:f269e3021894 52 *obj->reg_dir &= ~obj->mask;
elessair 0:f269e3021894 53 break;
elessair 0:f269e3021894 54 case PIN_OUTPUT:
elessair 0:f269e3021894 55 *obj->reg_dir |= obj->mask;
elessair 0:f269e3021894 56 break;
elessair 0:f269e3021894 57 }
elessair 0:f269e3021894 58 }