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https://github.com/espressif/ESP8266_RTOS_SDK.git
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103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _ROM_GPIO_H_
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#define _ROM_GPIO_H_
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#include <stdint.h>
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#include "esp8266/pin_mux_register.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup gpio_apis, uart configuration and communication related apis
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* @brief gpio apis
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*/
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/** @addtogroup gpio_apis
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* @{
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*/
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#define GPIO_INPUT_GET(gpio_no) ((gpio_input_get() >> (gpio_no)) & BIT0)
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/**
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* @brief Change GPIO(0-15) pin output by setting, clearing, or disabling pins, GPIO0<->BIT(0).
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* There is no particular ordering guaranteed; so if the order of writes is significant,
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* calling code should divide a single call into multiple calls.
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*
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* @param uint32_t set_mask : the gpios that need high level.
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*
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* @param uint32_t clear_mask : the gpios that need low level.
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*
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* @param uint32_t enable_mask : the gpios that need be changed.
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*
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* @param uint32_t disable_mask : the gpios that need diable output.
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*
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* @return None
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*/
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void gpio_output_set(uint32_t set_mask, uint32_t clear_mask, uint32_t enable_mask, uint32_t disable_mask);
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/**
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* @brief Sample the value of GPIO input pins(0-31) and returns a bitmask.
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*
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* @param None
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*
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* @return uint32_t : bitmask for GPIO input pins, BIT(0) for GPIO0.
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*/
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uint32_t gpio_input_get(void);
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/**
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* @brief Select pad as a gpio function from IOMUX.
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*
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* @param uint32_t gpio_num : gpio number, 0~15
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*
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* @return None
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*/
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static inline void gpio_pad_select_gpio(uint32_t gpio_num)
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{
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uint32_t gpio_mux_reg = PERIPHS_GPIO_MUX_REG(gpio_num);
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if (gpio_num == 0 || gpio_num == 2 || gpio_num == 4 || gpio_num == 5) {
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PIN_FUNC_SELECT(gpio_mux_reg, 0);
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} else {
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PIN_FUNC_SELECT(gpio_mux_reg, 3);
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}
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}
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/**
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* @brief Pull up the pad from gpio number.
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*
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* @param uint32_t gpio_num : gpio number, 0~15
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*
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* @return None
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*/
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static inline void gpio_pad_pullup(uint32_t gpio_num)
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{
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uint32_t gpio_mux_reg = PERIPHS_GPIO_MUX_REG(gpio_num);
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PIN_PULLUP_EN(gpio_mux_reg);
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}
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ROM_GPIO_H_ */
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