SSD1306 OLED display driver  1.4.10
This library is developed to control SSD1306/SSD1331 RGB i2c/spi OLED displays and spi PCD8544 LED display
io.h
1 /*
2  MIT License
3 
4  Copyright (c) 2018, Alexey Dynda
5 
6  Permission is hereby granted, free of charge, to any person obtaining a copy
7  of this software and associated documentation files (the "Software"), to deal
8  in the Software without restriction, including without limitation the rights
9  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  copies of the Software, and to permit persons to whom the Software is
11  furnished to do so, subject to the following conditions:
12 
13  The above copyright notice and this permission notice shall be included in all
14  copies or substantial portions of the Software.
15 
16  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22  SOFTWARE.
23 */
24 
29 #ifndef _SSD1306_LINUX_IO_H_
30 #define _SSD1306_LINUX_IO_H_
31 
32 #if (defined(__linux__) || defined(__MINGW32__)) && !defined(ARDUINO)
33 
34 #if defined(__KERNEL__)
35 #include <linux/types.h>
36 #elif defined(__MINGW32__)
37 #include <windows.h>
38 #include <stdint.h>
39 #include <unistd.h>
40 #else
41 #include <stdint.h>
42 #include <unistd.h>
43 #endif
44 
45 #define LOW 0
46 #define HIGH 1
47 #define INPUT 1
48 #define OUTPUT 0
49 #define PROGMEM
50 
51 #define SSD1306_LINUX_SUPPORTED
52 
53 #ifdef __cplusplus
54 extern "C" {
55 #endif
56 
57 static inline void digitalWrite(int pin, int level) {};
58 static inline int digitalRead(int pin) { return LOW; };
59 static inline void pinMode(int pin, int mode) {};
60 #if defined(__KERNEL__)
61 static inline void delay(unsigned long ms) { };
62 #elif defined(__MINGW32__)
63 static inline void delay(unsigned long ms) { Sleep(ms); };
64 #else
65 static inline void delay(unsigned long ms) { usleep(ms*1000); };
66 #endif
67 static inline int analogRead(int pin) { return 0; };
68 static inline uint32_t millis(void) { return 0; };
69 static inline void randomSeed(int seed) { };
70 static inline void attachInterrupt(int pin, void (*interrupt)(void), int level) { };
71 static inline uint8_t pgm_read_byte(const void *ptr) { return *((const uint8_t *)ptr); };
72 static inline uint16_t eeprom_read_word(const void *ptr) { return 0; };
73 static inline void eeprom_write_word(const void *ptr, uint16_t val) { };
74 
75 #if !defined(__MINGW32__)
76 /* For some reason defines do not work accross the libraries *
77  * Didn't yet figure out, what is the reason fo this issue */
78 //#define min(a,b) (((a)<(b))?(a):(b))
79 //#define max(a,b) (((a)>(b))?(a):(b))
80 static inline int min(int a, int b) { return a<b?a:b; };
81 static inline int max(int a, int b) { return a>b?a:b; };
82 #endif
83 
84 static inline char *utoa(unsigned int num, char *str, int radix) {
85  char temp[17]; //an int can only be 16 bits long
86  //at radix 2 (binary) the string
87  //is at most 16 + 1 null long.
88  int temp_loc = 0;
89  int digit;
90  int str_loc = 0;
91 
92  //construct a backward string of the number.
93  do {
94  digit = (unsigned int)num % radix;
95  if (digit < 10)
96  temp[temp_loc++] = digit + '0';
97  else
98  temp[temp_loc++] = digit - 10 + 'A';
99  num = ((unsigned int)num) / radix;
100  } while ((unsigned int)num > 0);
101 
102  temp_loc--;
103 
104 
105  //now reverse the string.
106  while ( temp_loc >=0 ) {// while there are still chars
107  str[str_loc++] = temp[temp_loc--];
108  }
109  str[str_loc] = 0; // add null termination.
110 
111  return str;
112 }
113 
114 #ifdef __cplusplus
115 }
116 #endif
117 
118 #ifdef __cplusplus
119 static inline int random(int max) { return 0; };
120 static inline int random(int min, int max) { return 0; };
121 #endif
122 
123 #endif
124 
125 #endif
126 
#define max(a, b)
#define min(a, b)