mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_NUVOTON/TARGET_NANO100/gpio_api.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
188:bcfe06ba3d64 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 174:b96e65c34a4d 1 /* mbed Microcontroller Library
AnnaBridge 174:b96e65c34a4d 2 * Copyright (c) 2015-2017 Nuvoton
AnnaBridge 174:b96e65c34a4d 3 *
AnnaBridge 174:b96e65c34a4d 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 174:b96e65c34a4d 5 * you may not use this file except in compliance with the License.
AnnaBridge 174:b96e65c34a4d 6 * You may obtain a copy of the License at
AnnaBridge 174:b96e65c34a4d 7 *
AnnaBridge 174:b96e65c34a4d 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 174:b96e65c34a4d 9 *
AnnaBridge 174:b96e65c34a4d 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 174:b96e65c34a4d 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 174:b96e65c34a4d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 174:b96e65c34a4d 13 * See the License for the specific language governing permissions and
AnnaBridge 174:b96e65c34a4d 14 * limitations under the License.
AnnaBridge 174:b96e65c34a4d 15 */
AnnaBridge 174:b96e65c34a4d 16
AnnaBridge 174:b96e65c34a4d 17 #include "gpio_api.h"
AnnaBridge 174:b96e65c34a4d 18 #include "mbed_assert.h"
AnnaBridge 174:b96e65c34a4d 19 #include "pinmap.h"
AnnaBridge 174:b96e65c34a4d 20 #include "mbed_error.h"
AnnaBridge 174:b96e65c34a4d 21 #include "PeripheralPins.h"
AnnaBridge 174:b96e65c34a4d 22
AnnaBridge 174:b96e65c34a4d 23 uint32_t gpio_set(PinName pin)
AnnaBridge 174:b96e65c34a4d 24 {
AnnaBridge 174:b96e65c34a4d 25 if (pin == (PinName) NC) {
AnnaBridge 174:b96e65c34a4d 26 return 0;
AnnaBridge 174:b96e65c34a4d 27 }
AnnaBridge 174:b96e65c34a4d 28
AnnaBridge 174:b96e65c34a4d 29 uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
AnnaBridge 174:b96e65c34a4d 30
AnnaBridge 174:b96e65c34a4d 31 // GPIO PinMap
AnnaBridge 174:b96e65c34a4d 32 pin_function(pin, 0 << NU_MFP_POS(pin_index));
AnnaBridge 174:b96e65c34a4d 33
AnnaBridge 174:b96e65c34a4d 34 return (uint32_t)(1 << pin_index); // Return the pin mask
AnnaBridge 174:b96e65c34a4d 35 }
AnnaBridge 174:b96e65c34a4d 36
AnnaBridge 181:57724642e740 37 int gpio_is_connected(const gpio_t *obj)
AnnaBridge 181:57724642e740 38 {
AnnaBridge 181:57724642e740 39 return (obj->pin != (PinName) NC);
AnnaBridge 181:57724642e740 40 }
AnnaBridge 181:57724642e740 41
AnnaBridge 174:b96e65c34a4d 42 void gpio_init(gpio_t *obj, PinName pin)
AnnaBridge 174:b96e65c34a4d 43 {
AnnaBridge 174:b96e65c34a4d 44 obj->pin = pin;
AnnaBridge 174:b96e65c34a4d 45
AnnaBridge 174:b96e65c34a4d 46 if (obj->pin == (PinName) NC) {
AnnaBridge 174:b96e65c34a4d 47 return;
AnnaBridge 174:b96e65c34a4d 48 }
AnnaBridge 174:b96e65c34a4d 49
AnnaBridge 174:b96e65c34a4d 50 obj->mask = gpio_set(pin);
AnnaBridge 188:bcfe06ba3d64 51 /* Default mode/direction */
AnnaBridge 188:bcfe06ba3d64 52 obj->mode = PullUp;
AnnaBridge 188:bcfe06ba3d64 53 obj->direction = PIN_INPUT;
AnnaBridge 174:b96e65c34a4d 54 }
AnnaBridge 174:b96e65c34a4d 55
AnnaBridge 174:b96e65c34a4d 56 void gpio_mode(gpio_t *obj, PinMode mode)
AnnaBridge 174:b96e65c34a4d 57 {
AnnaBridge 174:b96e65c34a4d 58 if (obj->pin == (PinName) NC) {
AnnaBridge 174:b96e65c34a4d 59 return;
AnnaBridge 174:b96e65c34a4d 60 }
AnnaBridge 188:bcfe06ba3d64 61
AnnaBridge 188:bcfe06ba3d64 62 switch (mode) {
AnnaBridge 188:bcfe06ba3d64 63 case PullNone:
AnnaBridge 188:bcfe06ba3d64 64 case PullDown:
AnnaBridge 188:bcfe06ba3d64 65 case PullUp:
AnnaBridge 188:bcfe06ba3d64 66 /* H/W doesn't support separate configuration for input pull mode/direction.
AnnaBridge 188:bcfe06ba3d64 67 * We translate to input-only/push-pull output I/O mode dependent on direction. */
AnnaBridge 188:bcfe06ba3d64 68 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 188:bcfe06ba3d64 69 break;
AnnaBridge 188:bcfe06ba3d64 70
AnnaBridge 188:bcfe06ba3d64 71
AnnaBridge 188:bcfe06ba3d64 72 case InputOnly:
AnnaBridge 188:bcfe06ba3d64 73 case PushPullOutput:
AnnaBridge 188:bcfe06ba3d64 74 /* We may meet contradictory I/O mode/direction configuration. Favor I/O mode
AnnaBridge 188:bcfe06ba3d64 75 * in the gpio_mode call here. */
AnnaBridge 188:bcfe06ba3d64 76 if (mode == InputOnly) {
AnnaBridge 188:bcfe06ba3d64 77 obj->direction = PIN_INPUT;
AnnaBridge 188:bcfe06ba3d64 78 obj->mode = InputOnly;
AnnaBridge 188:bcfe06ba3d64 79 } else {
AnnaBridge 188:bcfe06ba3d64 80 obj->direction = PIN_OUTPUT;
AnnaBridge 188:bcfe06ba3d64 81 obj->mode = PushPullOutput;
AnnaBridge 188:bcfe06ba3d64 82 }
AnnaBridge 188:bcfe06ba3d64 83 break;
AnnaBridge 188:bcfe06ba3d64 84
AnnaBridge 188:bcfe06ba3d64 85 default:
AnnaBridge 188:bcfe06ba3d64 86 /* Allow for configuring other I/O modes directly */
AnnaBridge 188:bcfe06ba3d64 87 obj->mode = mode;
AnnaBridge 188:bcfe06ba3d64 88 break;
AnnaBridge 188:bcfe06ba3d64 89 }
AnnaBridge 188:bcfe06ba3d64 90
AnnaBridge 188:bcfe06ba3d64 91 pin_mode(obj->pin, obj->mode);
AnnaBridge 174:b96e65c34a4d 92 }
AnnaBridge 174:b96e65c34a4d 93
AnnaBridge 174:b96e65c34a4d 94 void gpio_dir(gpio_t *obj, PinDirection direction)
AnnaBridge 174:b96e65c34a4d 95 {
AnnaBridge 174:b96e65c34a4d 96 if (obj->pin == (PinName) NC) {
AnnaBridge 174:b96e65c34a4d 97 return;
AnnaBridge 174:b96e65c34a4d 98 }
AnnaBridge 188:bcfe06ba3d64 99
AnnaBridge 188:bcfe06ba3d64 100 obj->direction = direction;
AnnaBridge 188:bcfe06ba3d64 101
AnnaBridge 188:bcfe06ba3d64 102 switch (obj->mode) {
AnnaBridge 188:bcfe06ba3d64 103 case PullNone:
AnnaBridge 188:bcfe06ba3d64 104 case PullDown:
AnnaBridge 188:bcfe06ba3d64 105 case PullUp:
AnnaBridge 188:bcfe06ba3d64 106 /* H/W doesn't support separate configuration for input pull mode/direction.
AnnaBridge 188:bcfe06ba3d64 107 * We translate to input-only/push-pull output I/O mode dependent on direction. */
AnnaBridge 188:bcfe06ba3d64 108 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 174:b96e65c34a4d 109 break;
AnnaBridge 188:bcfe06ba3d64 110
AnnaBridge 188:bcfe06ba3d64 111 case InputOnly:
AnnaBridge 188:bcfe06ba3d64 112 case PushPullOutput:
AnnaBridge 188:bcfe06ba3d64 113 /* We may meet contradictory I/O mode/direction configuration. Favor direction
AnnaBridge 188:bcfe06ba3d64 114 * in the gpio_dir call here. */
AnnaBridge 188:bcfe06ba3d64 115 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 174:b96e65c34a4d 116 break;
AnnaBridge 188:bcfe06ba3d64 117
AnnaBridge 174:b96e65c34a4d 118 default:
AnnaBridge 188:bcfe06ba3d64 119 break;
AnnaBridge 174:b96e65c34a4d 120 }
AnnaBridge 188:bcfe06ba3d64 121
AnnaBridge 188:bcfe06ba3d64 122 pin_mode(obj->pin, obj->mode);
AnnaBridge 174:b96e65c34a4d 123 }