![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466
Diff: mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/gpio_api.c
- Revision:
- 0:8fdf9a60065b
diff -r 000000000000 -r 8fdf9a60065b mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/gpio_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/targets/TARGET_NUVOTON/TARGET_NUC472/gpio_api.c Wed Oct 10 00:33:53 2018 +0000 @@ -0,0 +1,142 @@ +/* mbed Microcontroller Library + * Copyright (c) 2015-2016 Nuvoton + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "gpio_api.h" +#include "mbed_assert.h" +#include "pinmap.h" +#include "mbed_error.h" +#include "PeripheralPins.h" + +uint32_t gpio_set(PinName pin) +{ + if (pin == (PinName) NC) { + return 0; + } + + uint32_t pin_index = NU_PINNAME_TO_PIN(pin); + +#if 1 + pin_function(pin, 0 << NU_MFP_POS(pin_index)); +#else + pinmap_pinout(pin, PinMap_GPIO); +#endif + + return (uint32_t)(1 << pin_index); // Return the pin mask +} + +int gpio_is_connected(const gpio_t *obj) +{ + return (obj->pin != (PinName) NC); +} + +void gpio_init(gpio_t *obj, PinName pin) +{ + obj->pin = pin; + + if (obj->pin == (PinName) NC) { + return; + } + + obj->mask = gpio_set(pin); + /* Default mode/direction */ + obj->mode = PullUp; + obj->direction = PIN_INPUT; +} + +void gpio_mode(gpio_t *obj, PinMode mode) +{ + if (obj->pin == (PinName) NC) { + return; + } + + switch (mode) { + case PullNone: + case PullDown: + case PullUp: + /* H/W doesn't support separate configuration for input pull mode/direction. + * We translate to input-only/push-pull output I/O mode dependent on direction. */ + obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput; + break; + + case QuasiBidirectional: + /* With quasi-bidirectional I/O mode, before digital input function is performed, + * the corresponding bit in GPIOx_DOUT must be set to 1. */ + obj->mode = QuasiBidirectional; + if (obj->direction == PIN_INPUT) { + gpio_write(obj, 1); + } + break; + + case InputOnly: + case PushPullOutput: + /* We may meet contradictory I/O mode/direction configuration. Favor I/O mode + * in the gpio_mode call here. */ + if (mode == InputOnly) { + obj->direction = PIN_INPUT; + obj->mode = InputOnly; + } else { + obj->direction = PIN_OUTPUT; + obj->mode = PushPullOutput; + } + break; + + default: + /* Allow for configuring other I/O modes directly */ + obj->mode = mode; + break; + } + + pin_mode(obj->pin, obj->mode); +} + +void gpio_dir(gpio_t *obj, PinDirection direction) +{ + if (obj->pin == (PinName) NC) { + return; + } + + obj->direction = direction; + + switch (obj->mode) { + case PullNone: + case PullDown: + case PullUp: + /* H/W doesn't support separate configuration for input pull mode/direction. + * We translate to input-only/push-pull output I/O mode dependent on direction. */ + obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput; + break; + + case QuasiBidirectional: + /* With quasi-bidirectional I/O mode, before digital input function is performed, + * the corresponding bit in GPIOx_DOUT must be set to 1. */ + if (obj->direction == PIN_INPUT) { + gpio_write(obj, 1); + } + break; + + case InputOnly: + case PushPullOutput: + /* We may meet contradictory I/O mode/direction configuration. Favor direction + * in the gpio_dir call here. */ + obj->mode = (obj->direction == PIN_INPUT) ? InputOnly : PushPullOutput; + break; + + default: + break; + } + + pin_mode(obj->pin, obj->mode); +}