esp-open-rtos/core/esp_gpio.c

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/* GPIO management functions
*
* Part of esp-open-rtos
* Copyright (C) 2015 Angus Gratton
* BSD Licensed as described in the file LICENSE
*/
#include <esp/gpio.h>
void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction)
{
switch (direction) {
case GPIO_INPUT:
GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);
iomux_set_gpio_function(gpio_num, false);
break;
case GPIO_OUTPUT:
GPIO.CONF[gpio_num] &= ~GPIO_CONF_OPEN_DRAIN;
GPIO.ENABLE_OUT_SET = BIT(gpio_num);
iomux_set_gpio_function(gpio_num, true);
break;
case GPIO_OUT_OPEN_DRAIN:
GPIO.CONF[gpio_num] |= GPIO_CONF_OPEN_DRAIN;
GPIO.ENABLE_OUT_SET = BIT(gpio_num);
iomux_set_gpio_function(gpio_num, true);
break;
}
}
void gpio_set_pullup(uint8_t gpio_num, bool enabled, bool enabled_during_sleep)
{
uint32_t flags = 0;
if (enabled) {
flags |= IOMUX_PIN_PULLUP;
}
if (enabled_during_sleep) {
flags |= IOMUX_PIN_PULLUP_SLEEP;
}
iomux_set_pullup_flags(gpio_to_iomux(gpio_num), flags);
}