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@188:bcfe06ba3d64, 2018-11-08 (annotated)
- Committer:
- AnnaBridge
- Date:
- Thu Nov 08 11:46:34 2018 +0000
- Revision:
- 188:bcfe06ba3d64
- Parent:
- 187:0387e8f68319
mbed-dev library. Release version 164
Who changed what in which revision?
User | Revision | Line number | New 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 | } |