SSD1306 OLED display driver  1.7.1
This library is developed to control SSD1306/SSD1331/SSD1351/IL9163/PCD8554 RGB i2c/spi LED displays
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 
25 /*
26  * @file ssd1306_hal/linux/io.h SSD1306 LINUX IO communication functions
27  */
28 
29 #ifndef _SSD1306_LINUX_IO_H_
30 #define _SSD1306_LINUX_IO_H_
31 
32 #define CONFIG_PLATFORM_I2C_AVAILABLE
33 #define CONFIG_PLATFORM_SPI_AVAILABLE
34 
35 
36 #if defined(SDL_EMULATION) // SDL Emulation mode includes
37 #include "sdl_core.h"
38 #endif
39 
40 #if defined(__KERNEL__) // KERNEL includes
41 #include <linux/types.h>
42 
43 #else // LINUX includes
44 
45 #include <stdint.h>
46 #include <unistd.h>
47 #include <time.h>
48 #include <string.h>
49 #endif
50 
52 #define LOW 0
53 #define HIGH 1
54 #define INPUT 1
55 #define OUTPUT 0
56 
57 #define PROGMEM
58 
59 #ifdef __cplusplus
60 extern "C" {
61 #endif
62 
63 static inline int digitalRead(int pin) { return LOW; };
64 #if defined(__KERNEL__) // ============== KERNEL
65 static inline void delay(unsigned long ms) { };
66 static inline void delayMicroseconds(unsigned long us) { };
67 static inline int analogRead(int pin) { return 0; };
68 static inline void digitalWrite(int pin, int level) { };
69 static inline uint32_t millis(void) { return 0; };
70 static inline uint32_t micros(void) { return 0; };
71 static inline void pinMode(int pin, int mode) {};
72 
73 #else // ============== LINUX
74 static inline void delay(unsigned long ms) { usleep(ms*1000); };
75 static inline void delayMicroseconds(unsigned long us) { usleep(us); };
76 static inline uint32_t millis(void)
77 {
78  struct timespec ts;
79  clock_gettime(CLOCK_MONOTONIC, &ts);
80  return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
81 };
82 
83 static inline uint32_t micros(void)
84 {
85  struct timespec ts;
86  clock_gettime(CLOCK_MONOTONIC, &ts);
87  return ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
88 };
89 
90 /* For some reason defines do not work accross the libraries *
91  * Didn't yet figure out, what is the reason fo this issue */
92 //define min(a,b) (((a)<(b))?(a):(b))
93 //define max(a,b) (((a)>(b))?(a):(b))
94 static inline int min(int a, int b) { return a<b?a:b; };
95 static inline int max(int a, int b) { return a>b?a:b; };
96 #if !defined(SDL_EMULATION)
97 void pinMode(int pin, int mode);
98 #endif
99 
100 #endif
101 
102 #if defined(SDL_EMULATION)
103 static inline int analogRead(int pin) { return sdl_read_analog(pin); };
104 static inline void digitalWrite(int pin, int level) { sdl_write_digital(pin, level); };
105 static inline void pinMode(int pin, int mode) { };
106 #elif !defined(__KERNEL__)
107 static inline int analogRead(int pin) { return 0; };
108 void digitalWrite(int pin, int level);
109 #endif
110 
111 static inline void randomSeed(int seed) { };
112 static inline void attachInterrupt(int pin, void (*interrupt)(void), int level) { };
113 static inline uint8_t pgm_read_byte(const void *ptr) { return *((const uint8_t *)ptr); };
114 static inline uint16_t eeprom_read_word(const void *ptr) { return 0; };
115 static inline void eeprom_write_word(const void *ptr, uint16_t val) { };
116 
117 static inline char *utoa(unsigned int num, char *str, int radix)
118 {
119  char temp[17]; //an int can only be 16 bits long
120  //at radix 2 (binary) the string
121  //is at most 16 + 1 null long.
122  int temp_loc = 0;
123  int digit;
124  int str_loc = 0;
125 
126  //construct a backward string of the number.
127  do {
128  digit = (unsigned int)num % radix;
129  if (digit < 10)
130  temp[temp_loc++] = digit + '0';
131  else
132  temp[temp_loc++] = digit - 10 + 'A';
133  num = ((unsigned int)num) / radix;
134  } while ((unsigned int)num > 0);
135 
136  temp_loc--;
137 
138 
139  //now reverse the string.
140  while ( temp_loc >=0 ) {// while there are still chars
141  str[str_loc++] = temp[temp_loc--];
142  }
143  str[str_loc] = 0; // add null termination.
144 
145  return str;
146 }
147 
148 #ifdef __cplusplus
149 }
150 #endif
151 
152 #ifdef __cplusplus
153 #include <cstdlib>
154 static inline long random(long v)
155 {
156  return rand() % v;
157 }
158 
159 static inline long random(long min, long max)
160 {
161  return rand() % (max - min + 1) + min;
162 }
163 #endif
164 
165 #endif
166 
#define max(a, b)
#define min(a, b)