Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_NUVOTON/TARGET_NUC472/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) 2015-2016 Nuvoton
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
elessair 0:f269e3021894 17 #include "gpio_api.h"
elessair 0:f269e3021894 18 #include "mbed_assert.h"
elessair 0:f269e3021894 19 #include "pinmap.h"
elessair 0:f269e3021894 20 #include "mbed_error.h"
elessair 0:f269e3021894 21 #include "PeripheralPins.h"
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 uint32_t gpio_set(PinName pin)
elessair 0:f269e3021894 24 {
elessair 0:f269e3021894 25 if (pin == (PinName) NC) {
elessair 0:f269e3021894 26 return 0;
elessair 0:f269e3021894 27 }
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
elessair 0:f269e3021894 30
elessair 0:f269e3021894 31 #if 1
elessair 0:f269e3021894 32 pin_function(pin, 0 << NU_MFP_POS(pin_index));
elessair 0:f269e3021894 33 #else
elessair 0:f269e3021894 34 pinmap_pinout(pin, PinMap_GPIO);
elessair 0:f269e3021894 35 #endif
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 return (uint32_t)(1 << pin_index); // Return the pin mask
elessair 0:f269e3021894 38 }
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 void gpio_init(gpio_t *obj, PinName pin)
elessair 0:f269e3021894 41 {
elessair 0:f269e3021894 42 obj->pin = pin;
elessair 0:f269e3021894 43
elessair 0:f269e3021894 44 if (obj->pin == (PinName) NC) {
elessair 0:f269e3021894 45 return;
elessair 0:f269e3021894 46 }
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 obj->mask = gpio_set(pin);
elessair 0:f269e3021894 49 }
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 void gpio_mode(gpio_t *obj, PinMode mode)
elessair 0:f269e3021894 52 {
elessair 0:f269e3021894 53 if (obj->pin == (PinName) NC) {
elessair 0:f269e3021894 54 return;
elessair 0:f269e3021894 55 }
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 pin_mode(obj->pin, mode);
elessair 0:f269e3021894 58 }
elessair 0:f269e3021894 59
elessair 0:f269e3021894 60 void gpio_dir(gpio_t *obj, PinDirection direction)
elessair 0:f269e3021894 61 {
elessair 0:f269e3021894 62 if (obj->pin == (PinName) NC) {
elessair 0:f269e3021894 63 return;
elessair 0:f269e3021894 64 }
elessair 0:f269e3021894 65
elessair 0:f269e3021894 66 uint32_t pin_index = NU_PINNAME_TO_PIN(obj->pin);
elessair 0:f269e3021894 67 uint32_t port_index = NU_PINNAME_TO_PORT(obj->pin);
elessair 0:f269e3021894 68 GPIO_T *gpio_base = NU_PORT_BASE(port_index);
elessair 0:f269e3021894 69
elessair 0:f269e3021894 70 uint32_t mode_intern = GPIO_MODE_INPUT;
elessair 0:f269e3021894 71
elessair 0:f269e3021894 72 switch (direction) {
elessair 0:f269e3021894 73 case PIN_INPUT:
elessair 0:f269e3021894 74 mode_intern = GPIO_MODE_INPUT;
elessair 0:f269e3021894 75 break;
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 case PIN_OUTPUT:
elessair 0:f269e3021894 78 mode_intern = GPIO_MODE_OUTPUT;
elessair 0:f269e3021894 79 break;
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 default:
elessair 0:f269e3021894 82 return;
elessair 0:f269e3021894 83 }
elessair 0:f269e3021894 84
elessair 0:f269e3021894 85 GPIO_SetMode(gpio_base, 1 << pin_index, mode_intern);
elessair 0:f269e3021894 86 }