OVMS3-idf/components/driver/include/driver/rtc_io.h
2018-09-06 15:40:46 +08:00

276 lines
7.8 KiB
C

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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.
#ifndef _DRIVER_RTC_GPIO_H_
#define _DRIVER_RTC_GPIO_H_
#include <stdint.h>
#include "esp_err.h"
#include "driver/gpio.h"
#include "soc/rtc_gpio_channel.h"
#include "soc/rtc_periph.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
RTC_GPIO_MODE_INPUT_ONLY , /*!< Pad input */
RTC_GPIO_MODE_OUTPUT_ONLY, /*!< Pad output */
RTC_GPIO_MODE_INPUT_OUTPUT, /*!< Pad pull input + output */
RTC_GPIO_MODE_DISABLED, /*!< Pad (output + input) disable */
} rtc_gpio_mode_t;
/**
* @brief Determine if the specified GPIO is a valid RTC GPIO.
*
* @param gpio_num GPIO number
* @return true if GPIO is valid for RTC GPIO use. false otherwise.
*/
inline static bool rtc_gpio_is_valid_gpio(gpio_num_t gpio_num)
{
return gpio_num < GPIO_PIN_COUNT
&& rtc_gpio_desc[gpio_num].reg != 0;
}
#define RTC_GPIO_IS_VALID_GPIO(gpio_num) rtc_gpio_is_valid_gpio(gpio_num) // Deprecated, use rtc_gpio_is_valid_gpio()
/**
* @brief Init a GPIO as RTC GPIO
*
* This function must be called when initializing a pad for an analog function.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_init(gpio_num_t gpio_num);
/**
* @brief Init a GPIO as digital GPIO
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_deinit(gpio_num_t gpio_num);
/**
* @brief Get the RTC IO input level
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - 1 High level
* - 0 Low level
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
uint32_t rtc_gpio_get_level(gpio_num_t gpio_num);
/**
* @brief Set the RTC IO output level
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
* @param level output level
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_set_level(gpio_num_t gpio_num, uint32_t level);
/**
* @brief RTC GPIO set direction
*
* Configure RTC GPIO direction, such as output only, input only,
* output and input.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
* @param mode GPIO direction
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_set_direction(gpio_num_t gpio_num, rtc_gpio_mode_t mode);
/**
* @brief RTC GPIO pullup enable
*
* This function only works for RTC IOs. In general, call gpio_pullup_en,
* which will work both for normal GPIOs and RTC IOs.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_pullup_en(gpio_num_t gpio_num);
/**
* @brief RTC GPIO pulldown enable
*
* This function only works for RTC IOs. In general, call gpio_pulldown_en,
* which will work both for normal GPIOs and RTC IOs.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_pulldown_en(gpio_num_t gpio_num);
/**
* @brief RTC GPIO pullup disable
*
* This function only works for RTC IOs. In general, call gpio_pullup_dis,
* which will work both for normal GPIOs and RTC IOs.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_pullup_dis(gpio_num_t gpio_num);
/**
* @brief RTC GPIO pulldown disable
*
* This function only works for RTC IOs. In general, call gpio_pulldown_dis,
* which will work both for normal GPIOs and RTC IOs.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_pulldown_dis(gpio_num_t gpio_num);
/**
* @brief Enable hold function on an RTC IO pad
*
* Enabling HOLD function will cause the pad to latch current values of
* input enable, output enable, output value, function, drive strength values.
* This function is useful when going into light or deep sleep mode to prevent
* the pin configuration from changing.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_hold_en(gpio_num_t gpio_num);
/**
* @brief Disable hold function on an RTC IO pad
*
* Disabling hold function will allow the pad receive the values of
* input enable, output enable, output value, function, drive strength from
* RTC_IO peripheral.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12)
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_hold_dis(gpio_num_t gpio_num);
/**
* @brief Helper function to disconnect internal circuits from an RTC IO
* This function disables input, output, pullup, pulldown, and enables
* hold feature for an RTC IO.
* Use this function if an RTC IO needs to be disconnected from internal
* circuits in deep sleep, to minimize leakage current.
*
* In particular, for ESP32-WROVER module, call
* rtc_gpio_isolate(GPIO_NUM_12) before entering deep sleep, to reduce
* deep sleep current.
*
* @param gpio_num GPIO number (e.g. GPIO_NUM_12).
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_ARG if GPIO is not an RTC IO
*/
esp_err_t rtc_gpio_isolate(gpio_num_t gpio_num);
/**
* @brief Disable force hold signal for all RTC IOs
*
* Each RTC pad has a "force hold" input signal from the RTC controller.
* If this signal is set, pad latches current values of input enable,
* function, output enable, and other signals which come from the RTC mux.
* Force hold signal is enabled before going into deep sleep for pins which
* are used for EXT1 wakeup.
*/
void rtc_gpio_force_hold_dis_all();
/**
* @brief Set RTC GPIO pad drive capability
*
* @param gpio_num GPIO number, only support output GPIOs
* @param strength Drive capability of the pad
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t rtc_gpio_set_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t strength);
/**
* @brief Get RTC GPIO pad drive capability
*
* @param gpio_num GPIO number, only support output GPIOs
* @param strength Pointer to accept drive capability of the pad
*
* @return
* - ESP_OK Success
* - ESP_ERR_INVALID_ARG Parameter error
*/
esp_err_t rtc_gpio_get_drive_capability(gpio_num_t gpio_num, gpio_drive_cap_t* strength);
/**
* @brief Enable wakeup from sleep mode using specific GPIO
* @param gpio_num GPIO number
* @param intr_type Wakeup on high level (GPIO_INTR_HIGH_LEVEL) or low level
* (GPIO_INTR_LOW_LEVEL)
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_ARG if gpio_num is not an RTC IO, or intr_type is not
* one of GPIO_INTR_HIGH_LEVEL, GPIO_INTR_LOW_LEVEL.
*/
esp_err_t rtc_gpio_wakeup_enable(gpio_num_t gpio_num, gpio_int_type_t intr_type);
/**
* @brief Disable wakeup from sleep mode using specific GPIO
* @param gpio_num GPIO number
* @return
* - ESP_OK on success
* - ESP_ERR_INVALID_ARG if gpio_num is not an RTC IO
*/
esp_err_t rtc_gpio_wakeup_disable(gpio_num_t gpio_num);
#ifdef __cplusplus
}
#endif
#endif