j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Add esp/gpio_regs.h

Browse source
This commit is contained in:
Alex Stewart 2015-08-18 22:46:25 -07:00
parent 2ffd3da71e
commit fc1a1a7d0a
6 changed files with 167 additions and 114 deletions
Download patch file Download diff file Expand all files Collapse all files

55
core/include/esp/gpio.h
View file

@ -9,7 +9,7 @@
#ifndef _ESP_GPIO_H
#define _ESP_GPIO_H
#include <stdbool.h>
#include "esp/registers.h"
#include "esp/gpio_regs.h"
#include "esp/iomux.h"
#include "esp/cpu.h"
#include "xtensa_interrupts.h"
@ -32,26 +32,27 @@ INLINED void gpio_enable(const uint8_t gpio_num, const gpio_direction_t directio
switch(direction) {
case GPIO_INPUT:
iomux_flags = 0;
ctrl_val = GPIO_SOURCE_GPIO;
ctrl_val = 0;
break;
case GPIO_OUTPUT:
iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
ctrl_val = GPIO_DRIVE_PUSH_PULL|GPIO_SOURCE_GPIO;
ctrl_val = GPIO_CONF_DRIVER_ENABLE;
break;
case GPIO_OUT_OPEN_DRAIN:
iomux_flags = IOMUX_PIN_OUTPUT_ENABLE;
ctrl_val = GPIO_DRIVE_OPEN_DRAIN|GPIO_SOURCE_GPIO;
ctrl_val = 0;
break;
case GPIO_INPUT_PULLUP:
iomux_flags = IOMUX_PIN_PULLUP;
ctrl_val = GPIO_SOURCE_GPIO;
ctrl_val = 0;
break;
}
iomux_set_gpio_function(gpio_num, iomux_flags);
GPIO_CTRL_REG(gpio_num) = (GPIO_CTRL_REG(gpio_num)&GPIO_INT_MASK) | ctrl_val;
if(direction == GPIO_OUTPUT)
GPIO_DIR_SET = BIT(gpio_num);
GPIO.CONF[gpio_num] = (GPIO.CONF[gpio_num] & FIELD_MASK(GPIO_CONF_INTTYPE)) | ctrl_val;
if (iomux_flags & IOMUX_PIN_OUTPUT_ENABLE)
GPIO.ENABLE_OUT_SET = BIT(gpio_num);
else
GPIO_DIR_CLEAR = BIT(gpio_num);
GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);
}
/* Disable GPIO on the specified pin, and set it Hi-Z.
@ -61,7 +62,7 @@ INLINED void gpio_enable(const uint8_t gpio_num, const gpio_direction_t directio
*/
INLINED void gpio_disable(const uint8_t gpio_num)
{
GPIO_DIR_CLEAR = BIT(gpio_num);
GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);
*gpio_iomux_reg(gpio_num) &= ~IOMUX_PIN_OUTPUT_ENABLE;
}
@ -72,9 +73,9 @@ INLINED void gpio_disable(const uint8_t gpio_num)
INLINED void gpio_write(const uint8_t gpio_num, const bool set)
{
if(set)
GPIO_OUT_SET = BIT(gpio_num);
GPIO.OUT_SET = BIT(gpio_num);
else
GPIO_OUT_CLEAR = BIT(gpio_num);
GPIO.OUT_CLEAR = BIT(gpio_num);
}
/* Toggle output of a pin
@ -89,10 +90,10 @@ INLINED void gpio_toggle(const uint8_t gpio_num)
get an invalid value. Prevents one task from clobbering another
task's pins, without needing to disable/enable interrupts.
*/
if(GPIO_OUT_REG & BIT(gpio_num))
GPIO_OUT_CLEAR = BIT(gpio_num);
if(GPIO.OUT & BIT(gpio_num))
GPIO.OUT_CLEAR = BIT(gpio_num);
else
GPIO_OUT_SET = BIT(gpio_num);
GPIO.OUT_SET = BIT(gpio_num);
}
/* Read input value of a GPIO pin.
@ -102,38 +103,28 @@ INLINED void gpio_toggle(const uint8_t gpio_num)
*/
INLINED bool gpio_read(const uint8_t gpio_num)
{
return GPIO_IN_REG & BIT(gpio_num);
return GPIO.IN & BIT(gpio_num);
}
typedef enum {
INT_NONE = 0,
INT_RISING = GPIO_INT_RISING,
INT_FALLING = GPIO_INT_FALLING,
INT_CHANGE = GPIO_INT_CHANGE,
INT_LOW = GPIO_INT_LOW,
INT_HIGH = GPIO_INT_HIGH,
} gpio_interrupt_t;
extern void gpio_interrupt_handler(void);
/* Set the interrupt type for a given pin
*
* If int_type is not INT_NONE, the gpio_interrupt_handler will be attached and unmasked.
* If int_type is not GPIO_INTTYPE_NONE, the gpio_interrupt_handler will be attached and unmasked.
*/
INLINED void gpio_set_interrupt(const uint8_t gpio_num, const gpio_interrupt_t int_type)
INLINED void gpio_set_interrupt(const uint8_t gpio_num, const gpio_inttype_t int_type)
{
GPIO_CTRL_REG(gpio_num) = (GPIO_CTRL_REG(gpio_num)&~GPIO_INT_MASK)
| (int_type & GPIO_INT_MASK);
if(int_type != INT_NONE) {
GPIO.CONF[gpio_num] = SET_FIELD(GPIO.CONF[gpio_num], GPIO_CONF_INTTYPE, int_type);
if(int_type != GPIO_INTTYPE_NONE) {
_xt_isr_attach(INUM_GPIO, gpio_interrupt_handler);
_xt_isr_unmask(1<<INUM_GPIO);
}
}
/* Return the interrupt type set for a pin */
INLINED gpio_interrupt_t gpio_get_interrupt(const uint8_t gpio_num)
INLINED gpio_inttype_t gpio_get_interrupt(const uint8_t gpio_num)
{
return (gpio_interrupt_t)(GPIO_CTRL_REG(gpio_num) & GPIO_INT_MASK);
return FIELD2VAL(GPIO_CONF_INTTYPE, GPIO.CONF[gpio_num]);
}
#endif