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GPIO16 support.

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This commit is contained in:
ourairquality 2016-08-30 21:22:05 +10:00
parent c9851e9253
commit c52890eed7
2 changed files with 27 additions and 4 deletions
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17
core/esp_gpio.c
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@ -5,9 +5,26 @@
* BSD Licensed as described in the file LICENSE * BSD Licensed as described in the file LICENSE
*/ */
#include <esp/gpio.h> #include <esp/gpio.h>
#include <esp/rtc_regs.h>
void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction) void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction)
{ {
if (gpio_num == 16) {
RTC.GPIO_CFG[3] = (RTC.GPIO_CFG[3] & 0xffffffbc) | 1;
RTC.GPIO_CONF = (RTC.GPIO_CONF & 0xfffffffe) | 0;
switch (direction) {
case GPIO_INPUT:
RTC.GPIO_ENABLE = (RTC.GPIO_OUT & 0xfffffffe);
break;
case GPIO_OUTPUT:
case GPIO_OUT_OPEN_DRAIN:
/* TODO open drain? */
RTC.GPIO_ENABLE = (RTC.GPIO_OUT & 0xfffffffe) | 1;
break;
}
return;
}
switch (direction) { switch (direction) {
case GPIO_INPUT: case GPIO_INPUT:
GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num); GPIO.ENABLE_OUT_CLEAR = BIT(gpio_num);

14
core/include/esp/gpio.h
View file

@ -10,6 +10,7 @@
#define _ESP_GPIO_H #define _ESP_GPIO_H
#include <stdbool.h> #include <stdbool.h>
#include "esp/gpio_regs.h" #include "esp/gpio_regs.h"
#include "esp/rtc_regs.h"
#include "esp/iomux.h" #include "esp/iomux.h"
#include "esp/interrupts.h" #include "esp/interrupts.h"
@ -23,7 +24,7 @@ typedef enum {
GPIO_OUT_OPEN_DRAIN, /* Open drain output */ GPIO_OUT_OPEN_DRAIN, /* Open drain output */
} gpio_direction_t; } gpio_direction_t;
/* Enable GPIO on the specified pin, and set it to input or output mode /* Enable GPIO on the specified pin, and set it to input or output mode.
*/ */
void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction); void gpio_enable(const uint8_t gpio_num, const gpio_direction_t direction);
@ -80,7 +81,9 @@ static inline void gpio_set_output_on_sleep(const uint8_t gpio_num, bool enabled
*/ */
static inline void gpio_write(const uint8_t gpio_num, const bool set) static inline void gpio_write(const uint8_t gpio_num, const bool set)
{ {
if (set) if (gpio_num == 16) {
RTC.GPIO_OUT = (RTC.GPIO_OUT & 0xfffffffe) | (set ? 1 : 0);
} else if (set)
GPIO.OUT_SET = BIT(gpio_num) & GPIO_OUT_PIN_MASK; GPIO.OUT_SET = BIT(gpio_num) & GPIO_OUT_PIN_MASK;
else else
GPIO.OUT_CLEAR = BIT(gpio_num) & GPIO_OUT_PIN_MASK; GPIO.OUT_CLEAR = BIT(gpio_num) & GPIO_OUT_PIN_MASK;
@ -101,7 +104,7 @@ static inline void gpio_toggle(const uint8_t gpio_num)
get an invalid value. Prevents one task from clobbering another get an invalid value. Prevents one task from clobbering another
task's pins, without needing to disable/enable interrupts. task's pins, without needing to disable/enable interrupts.
*/ */
if(GPIO.OUT & BIT(gpio_num)) if (GPIO.OUT & BIT(gpio_num))
GPIO.OUT_CLEAR = BIT(gpio_num) & GPIO_OUT_PIN_MASK; GPIO.OUT_CLEAR = BIT(gpio_num) & GPIO_OUT_PIN_MASK;
else else
GPIO.OUT_SET = BIT(gpio_num) & GPIO_OUT_PIN_MASK; GPIO.OUT_SET = BIT(gpio_num) & GPIO_OUT_PIN_MASK;
@ -118,7 +121,10 @@ static inline void gpio_toggle(const uint8_t gpio_num)
*/ */
static inline bool gpio_read(const uint8_t gpio_num) static inline bool gpio_read(const uint8_t gpio_num)
{ {
return GPIO.IN & BIT(gpio_num); if (gpio_num == 16)
return RTC.GPIO_IN & 1;
else
return GPIO.IN & BIT(gpio_num);
} }
extern void gpio_interrupt_handler(void); extern void gpio_interrupt_handler(void);