39 lines
1 KiB
C
39 lines
1 KiB
C
/* GPIO management functions
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*
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* Part of esp-open-rtos
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* Copyright (C) 2015 Angus Gratton
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* BSD Licensed as described in the file LICENSE
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*/
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#include <esp/gpio.h>
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void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction)
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{
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uint32_t iomux_flags;
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switch(direction) {
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case GPIO_INPUT:
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iomux_flags = 0;
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break;
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case GPIO_OUTPUT:
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iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
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break;
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case GPIO_OUT_OPEN_DRAIN:
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iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
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break;
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case GPIO_INPUT_PULLUP:
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iomux_flags = IOMUX_PIN_PULLUP;
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break;
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default:
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return; /* Invalid direction flag */
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}
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iomux_set_gpio_function(gpio_num, iomux_flags);
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if(direction == GPIO_OUT_OPEN_DRAIN)
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GPIO.CONF[gpio_num] |= GPIO_CONF_OPEN_DRAIN;
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else
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GPIO.CONF[gpio_num] &= ~GPIO_CONF_OPEN_DRAIN;
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if (iomux_flags & IOMUX_PIN_OUTPUT_ENABLE)
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GPIO.ENABLE_OUT_SET = BIT(gpio_num);
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else
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GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);
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}
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