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_M2351/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 187:0387e8f68319 1 /* mbed Microcontroller Library
AnnaBridge 187:0387e8f68319 2 * Copyright (c) 2015-2017 Nuvoton
AnnaBridge 187:0387e8f68319 3 *
AnnaBridge 187:0387e8f68319 4 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 187:0387e8f68319 5 * you may not use this file except in compliance with the License.
AnnaBridge 187:0387e8f68319 6 * You may obtain a copy of the License at
AnnaBridge 187:0387e8f68319 7 *
AnnaBridge 187:0387e8f68319 8 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 187:0387e8f68319 9 *
AnnaBridge 187:0387e8f68319 10 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 187:0387e8f68319 11 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 187:0387e8f68319 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 187:0387e8f68319 13 * See the License for the specific language governing permissions and
AnnaBridge 187:0387e8f68319 14 * limitations under the License.
AnnaBridge 187:0387e8f68319 15 */
AnnaBridge 187:0387e8f68319 16
AnnaBridge 187:0387e8f68319 17 #include "gpio_api.h"
AnnaBridge 187:0387e8f68319 18 #include "mbed_assert.h"
AnnaBridge 187:0387e8f68319 19 #include "pinmap.h"
AnnaBridge 187:0387e8f68319 20 #include "mbed_error.h"
AnnaBridge 187:0387e8f68319 21 #include "PeripheralPins.h"
AnnaBridge 187:0387e8f68319 22
AnnaBridge 187:0387e8f68319 23 uint32_t gpio_set(PinName pin)
AnnaBridge 187:0387e8f68319 24 {
AnnaBridge 187:0387e8f68319 25 if (pin == (PinName) NC) {
AnnaBridge 187:0387e8f68319 26 return 0;
AnnaBridge 187:0387e8f68319 27 }
AnnaBridge 187:0387e8f68319 28
AnnaBridge 187:0387e8f68319 29 uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
AnnaBridge 187:0387e8f68319 30
AnnaBridge 187:0387e8f68319 31 #if 1
AnnaBridge 187:0387e8f68319 32 pin_function(pin, 0 << NU_MFP_POS(pin_index));
AnnaBridge 187:0387e8f68319 33 #else
AnnaBridge 187:0387e8f68319 34 pinmap_pinout(pin, PinMap_GPIO);
AnnaBridge 187:0387e8f68319 35 #endif
AnnaBridge 187:0387e8f68319 36
AnnaBridge 187:0387e8f68319 37 return (uint32_t)(1 << pin_index); // Return the pin mask
AnnaBridge 187:0387e8f68319 38 }
AnnaBridge 187:0387e8f68319 39
AnnaBridge 187:0387e8f68319 40 int gpio_is_connected(const gpio_t *obj)
AnnaBridge 187:0387e8f68319 41 {
AnnaBridge 187:0387e8f68319 42 return (obj->pin != (PinName) NC);
AnnaBridge 187:0387e8f68319 43 }
AnnaBridge 187:0387e8f68319 44
AnnaBridge 187:0387e8f68319 45 void gpio_init(gpio_t *obj, PinName pin)
AnnaBridge 187:0387e8f68319 46 {
AnnaBridge 187:0387e8f68319 47 obj->pin = pin;
AnnaBridge 187:0387e8f68319 48
AnnaBridge 187:0387e8f68319 49 if (obj->pin == (PinName) NC) {
AnnaBridge 187:0387e8f68319 50 return;
AnnaBridge 187:0387e8f68319 51 }
AnnaBridge 187:0387e8f68319 52
AnnaBridge 187:0387e8f68319 53 obj->mask = gpio_set(pin);
AnnaBridge 188:bcfe06ba3d64 54 /* Default mode/direction */
AnnaBridge 188:bcfe06ba3d64 55 obj->mode = PullUp;
AnnaBridge 188:bcfe06ba3d64 56 obj->direction = PIN_INPUT;
AnnaBridge 187:0387e8f68319 57 }
AnnaBridge 187:0387e8f68319 58
AnnaBridge 187:0387e8f68319 59 void gpio_mode(gpio_t *obj, PinMode mode)
AnnaBridge 187:0387e8f68319 60 {
AnnaBridge 187:0387e8f68319 61 if (obj->pin == (PinName) NC) {
AnnaBridge 187:0387e8f68319 62 return;
AnnaBridge 187:0387e8f68319 63 }
AnnaBridge 188:bcfe06ba3d64 64
AnnaBridge 188:bcfe06ba3d64 65 switch (mode) {
AnnaBridge 188:bcfe06ba3d64 66 case PullNone:
AnnaBridge 188:bcfe06ba3d64 67 case PullDown:
AnnaBridge 188:bcfe06ba3d64 68 case PullUp:
AnnaBridge 188:bcfe06ba3d64 69 /* H/W doesn't support separate configuration for input pull mode/direction.
AnnaBridge 188:bcfe06ba3d64 70 * We translate to input-only/push-pull output I/O mode dependent on direction. */
AnnaBridge 188:bcfe06ba3d64 71 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 188:bcfe06ba3d64 72 break;
AnnaBridge 188:bcfe06ba3d64 73
AnnaBridge 188:bcfe06ba3d64 74 case QuasiBidirectional:
AnnaBridge 188:bcfe06ba3d64 75 /* With quasi-bidirectional I/O mode, before digital input function is performed,
AnnaBridge 188:bcfe06ba3d64 76 * the corresponding bit in GPIOx_DOUT must be set to 1. */
AnnaBridge 188:bcfe06ba3d64 77 obj->mode = QuasiBidirectional;
AnnaBridge 188:bcfe06ba3d64 78 if (obj->direction == PIN_INPUT) {
AnnaBridge 188:bcfe06ba3d64 79 gpio_write(obj, 1);
AnnaBridge 188:bcfe06ba3d64 80 }
AnnaBridge 188:bcfe06ba3d64 81 break;
AnnaBridge 188:bcfe06ba3d64 82
AnnaBridge 188:bcfe06ba3d64 83 case InputOnly:
AnnaBridge 188:bcfe06ba3d64 84 case PushPullOutput:
AnnaBridge 188:bcfe06ba3d64 85 /* We may meet contradictory I/O mode/direction configuration. Favor I/O mode
AnnaBridge 188:bcfe06ba3d64 86 * in the gpio_mode call here. */
AnnaBridge 188:bcfe06ba3d64 87 if (mode == InputOnly) {
AnnaBridge 188:bcfe06ba3d64 88 obj->direction = PIN_INPUT;
AnnaBridge 188:bcfe06ba3d64 89 obj->mode = InputOnly;
AnnaBridge 188:bcfe06ba3d64 90 } else {
AnnaBridge 188:bcfe06ba3d64 91 obj->direction = PIN_OUTPUT;
AnnaBridge 188:bcfe06ba3d64 92 obj->mode = PushPullOutput;
AnnaBridge 188:bcfe06ba3d64 93 }
AnnaBridge 188:bcfe06ba3d64 94 break;
AnnaBridge 188:bcfe06ba3d64 95
AnnaBridge 188:bcfe06ba3d64 96 default:
AnnaBridge 188:bcfe06ba3d64 97 /* Allow for configuring other I/O modes directly */
AnnaBridge 188:bcfe06ba3d64 98 obj->mode = mode;
AnnaBridge 188:bcfe06ba3d64 99 break;
AnnaBridge 188:bcfe06ba3d64 100 }
AnnaBridge 188:bcfe06ba3d64 101
AnnaBridge 188:bcfe06ba3d64 102 pin_mode(obj->pin, obj->mode);
AnnaBridge 187:0387e8f68319 103 }
AnnaBridge 187:0387e8f68319 104
AnnaBridge 187:0387e8f68319 105 void gpio_dir(gpio_t *obj, PinDirection direction)
AnnaBridge 187:0387e8f68319 106 {
AnnaBridge 187:0387e8f68319 107 if (obj->pin == (PinName) NC) {
AnnaBridge 187:0387e8f68319 108 return;
AnnaBridge 187:0387e8f68319 109 }
AnnaBridge 188:bcfe06ba3d64 110
AnnaBridge 188:bcfe06ba3d64 111 obj->direction = direction;
AnnaBridge 188:bcfe06ba3d64 112
AnnaBridge 188:bcfe06ba3d64 113 switch (obj->mode) {
AnnaBridge 188:bcfe06ba3d64 114 case PullNone:
AnnaBridge 188:bcfe06ba3d64 115 case PullDown:
AnnaBridge 188:bcfe06ba3d64 116 case PullUp:
AnnaBridge 188:bcfe06ba3d64 117 /* H/W doesn't support separate configuration for input pull mode/direction.
AnnaBridge 188:bcfe06ba3d64 118 * We translate to input-only/push-pull output I/O mode dependent on direction. */
AnnaBridge 188:bcfe06ba3d64 119 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 187:0387e8f68319 120 break;
AnnaBridge 187:0387e8f68319 121
AnnaBridge 188:bcfe06ba3d64 122 case QuasiBidirectional:
AnnaBridge 188:bcfe06ba3d64 123 /* With quasi-bidirectional I/O mode, before digital input function is performed,
AnnaBridge 188:bcfe06ba3d64 124 * the corresponding bit in GPIOx_DOUT must be set to 1. */
AnnaBridge 188:bcfe06ba3d64 125 if (obj->direction == PIN_INPUT) {
AnnaBridge 188:bcfe06ba3d64 126 gpio_write(obj, 1);
AnnaBridge 188:bcfe06ba3d64 127 }
AnnaBridge 188:bcfe06ba3d64 128 break;
AnnaBridge 188:bcfe06ba3d64 129
AnnaBridge 188:bcfe06ba3d64 130 case InputOnly:
AnnaBridge 188:bcfe06ba3d64 131 case PushPullOutput:
AnnaBridge 188:bcfe06ba3d64 132 /* We may meet contradictory I/O mode/direction configuration. Favor direction
AnnaBridge 188:bcfe06ba3d64 133 * in the gpio_dir call here. */
AnnaBridge 188:bcfe06ba3d64 134 obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput;
AnnaBridge 188:bcfe06ba3d64 135 break;
AnnaBridge 188:bcfe06ba3d64 136
AnnaBridge 187:0387e8f68319 137 default:
AnnaBridge 188:bcfe06ba3d64 138 break;
AnnaBridge 187:0387e8f68319 139 }
AnnaBridge 188:bcfe06ba3d64 140
AnnaBridge 188:bcfe06ba3d64 141 pin_mode(obj->pin, obj->mode);
AnnaBridge 187:0387e8f68319 142 }