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Add esp_gpio.c, including gpio_enable() function

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Fix build broken since 812c2fef (unclear why previous commits didn't break?)
This commit is contained in:
Angus Gratton 2015-12-01 09:56:40 +11:00
parent 0078a9e04e
commit b4af009efe
1 changed files with 39 additions and 0 deletions
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core/esp_gpio.c Normal file
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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)
{
uint32_t iomux_flags;
switch(direction) {
case GPIO_INPUT:
iomux_flags = 0;
break;
case GPIO_OUTPUT:
iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
break;
case GPIO_OUT_OPEN_DRAIN:
iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
break;
case GPIO_INPUT_PULLUP:
iomux_flags = IOMUX_PIN_PULLUP;
break;
default:
return; /* Invalid direction flag */
}
iomux_set_gpio_function(gpio_num, iomux_flags);
if(direction == GPIO_OUT_OPEN_DRAIN)
GPIO.CONF[gpio_num] |= GPIO_CONF_OPEN_DRAIN;
else
GPIO.CONF[gpio_num] &= ~GPIO_CONF_OPEN_DRAIN;
if (iomux_flags & IOMUX_PIN_OUTPUT_ENABLE)
GPIO.ENABLE_OUT_SET = BIT(gpio_num);
else
GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);
}