1  /*
 2   Arduino.h - Main include file for the Arduino SDK
 3   Copyright (c) 2005-2013 Arduino Team.  All right reserved.
 4  
 5   This library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9  
10   This library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14  
15   You should have received a copy of the GNU Lesser General Public
16   License along with this library; if not, write to the Free Software
17   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18   */
19  
20  #ifndef MAIN_ESP32_HAL_GPIO_H_
21  #define MAIN_ESP32_HAL_GPIO_H_
22  
23  #ifdef __cplusplus
24  extern "C" {
25  #endif
26    
27  
28  #define LOW               0x0
29  #define HIGH              0x1
30  
31  //GPIO FUNCTIONS
32  #define INPUT             0x01
33  #define OUTPUT            0x02
34  #define PULLUP            0x04
35  #define INPUT_PULLUP      0x05
36  #define PULLDOWN          0x08
37  #define INPUT_PULLDOWN    0x09
38  #define OPEN_DRAIN        0x10
39  #define OUTPUT_OPEN_DRAIN 0x12
40  #define SPECIAL           0xF0
41  #define FUNCTION_1        0x00
42  #define FUNCTION_2        0x20
43  #define FUNCTION_3        0x40
44  #define FUNCTION_4        0x60
45  #define FUNCTION_5        0x80
46  #define FUNCTION_6        0xA0
47  #define ANALOG            0xC0
48  
49  //Interrupt Modes
50  #define DISABLED  0x00
51  #define RISING    0x01
52  #define FALLING   0x02
53  #define CHANGE    0x03
54  #define ONLOW     0x04
55  #define ONHIGH    0x05
56  #define ONLOW_WE  0x0C
57  #define ONHIGH_WE 0x0D
58  
59  typedef struct {
60      uint8_t reg;      /*!< GPIO register offset from DR_REG_IO_MUX_BASE */
61      int8_t rtc;       /*!< RTC GPIO number (-1 if not RTC GPIO pin) */
62      int8_t adc;       /*!< ADC Channel number (-1 if not ADC pin) */
63      int8_t touch;     /*!< Touch Channel number (-1 if not Touch pin) */
64  } esp32_gpioMux_t;
65  
66  extern const esp32_gpioMux_t esp32_gpioMux[40];
67  extern const int8_t esp32_adc2gpio[20];
68  
69  #define digitalPinIsValid(pin)          ((pin) < 40 && esp32_gpioMux[(pin)].reg)
70  #define digitalPinCanOutput(pin)        ((pin) < 34 && esp32_gpioMux[(pin)].reg)
71  #define digitalPinToRtcPin(pin)         (((pin) < 40)?esp32_gpioMux[(pin)].rtc:-1)
72  #define digitalPinToAnalogChannel(pin)  (((pin) < 40)?esp32_gpioMux[(pin)].adc:-1)
73  #define digitalPinToTouchChannel(pin)   (((pin) < 40)?esp32_gpioMux[(pin)].touch:-1)
74  #define digitalPinToDacChannel(pin)     (((pin) == 25)?0:((pin) == 26)?1:-1)
75  
76  void pinMode(uint8_t pin, uint8_t mode);
77  void digitalWrite(uint8_t pin, uint8_t val);
78  int digitalRead(uint8_t pin);
79  
80  void attachInterrupt(uint8_t pin, void (*)(void), int mode);
81  void attachInterruptArg(uint8_t pin, void (*)(void*), void * arg, int mode);
82  void detachInterrupt(uint8_t pin);
83  
84  #ifdef __cplusplus
85  }
86  #endif
87  
88  #endif /* MAIN_ESP32_HAL_GPIO_H_ */