SSD1306 OLED display driver 1.8.2 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 <stdio.h>
46 #include <stdint.h>
47 #include <unistd.h>
48 #include <time.h>
49 #include <string.h>
50 #endif
51
53 #define LOW 0
54 #define HIGH 1
55 #define INPUT 1
56 #define OUTPUT 0
57
58 #define PROGMEM
59
60 #ifdef __cplusplus
61 extern "C" {
62 #endif
63
64 #if defined(__KERNEL__) // ============== KERNEL
65 static inline int digitalRead(int pin) { return LOW; };
66 static inline void delay(unsigned long ms) { };
67 static inline void delayMicroseconds(unsigned long us) { };
68 static inline int analogRead(int pin) { return 0; };
69 static inline void digitalWrite(int pin, int level) { };
70 static inline uint32_t millis(void) { return 0; };
71 static inline uint32_t micros(void) { return 0; };
72 static inline void pinMode(int pin, int mode) {};
73
74 #else // ============== LINUX
75 static inline void delay(unsigned long ms) { usleep(ms*1000); };
76 static inline void delayMicroseconds(unsigned long us) { usleep(us); };
77 static inline uint32_t millis(void)
78 {
79 struct timespec ts;
80 clock_gettime(CLOCK_MONOTONIC, &ts);
81 return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
82 };
83
84 static inline uint32_t micros(void)
85 {
86 struct timespec ts;
87 clock_gettime(CLOCK_MONOTONIC, &ts);
88 return ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
89 };
90
91 /* For some reason defines do not work accross the libraries *
92 * Didn't yet figure out, what is the reason fo this issue */
93 //define min(a,b) (((a)<(b))?(a):(b))
94 //define max(a,b) (((a)>(b))?(a):(b))
95 static inline int min(int a, int b) { return a<b?a:b; };
96 static inline int max(int a, int b) { return a>b?a:b; };
97 #if !defined(SDL_EMULATION)
98 void pinMode(int pin, int mode);
99 static inline int digitalRead(int pin) { return LOW; };
100 #endif
101
102 #endif
103
104 #if defined(SDL_EMULATION)
105 static inline int digitalRead(int pin) { return sdl_read_digital(pin); };
106 static inline int analogRead(int pin) { return sdl_read_analog(pin); };
107 static inline void digitalWrite(int pin, int level) { sdl_write_digital(pin, level); };
108 static inline void pinMode(int pin, int mode) { };
109 #elif !defined(__KERNEL__)
110 static inline int analogRead(int pin) { return 0; };
111 void digitalWrite(int pin, int level);
112 #endif
113
114 static inline void randomSeed(int seed) { };
115 static inline void attachInterrupt(int pin, void (*interrupt)(void), int level) { };
116 static inline uint8_t pgm_read_byte(const void *ptr) { return *((const uint8_t *)ptr); };
117 static inline uint16_t eeprom_read_word(const void *ptr) { return 0; };
118 static inline void eeprom_write_word(const void *ptr, uint16_t val) { };
119
120 static inline char *utoa(unsigned int num, char *str, int radix)
121 {
122 char temp[17]; //an int can only be 16 bits long
123 //at radix 2 (binary) the string
124 //is at most 16 + 1 null long.
125 int temp_loc = 0;
126 int str_loc = 0;
127
128 //construct a backward string of the number.
129 do {
130 int digit = (unsigned int)num % radix;
131 if (digit < 10)
132 temp[temp_loc++] = digit + '0';
133 else
134 temp[temp_loc++] = digit - 10 + 'A';
135 num = ((unsigned int)num) / radix;
136 } while ((unsigned int)num > 0);
137
138 temp_loc--;
139
140
141 //now reverse the string.
142 while ( temp_loc >=0 ) {// while there are still chars
143 str[str_loc++] = temp[temp_loc--];
144 }
145 str[str_loc] = 0; // add null termination.
146
147 return str;
148 }
149
150 #ifdef __cplusplus
151 }
152 #endif
153
154 #ifdef __cplusplus
155 #include <cstdlib>
156 static inline long random(long v)
157 {
158 return rand() % v;
159 }
160
161 static inline long random(long min, long max)
162 {
163 return rand() % (max - min + 1) + min;
164 }
165 #endif
166
167 #endif
168
max
#define max(a, b)
Definition: nano_gfx_types.h:40
min
#define min(a, b)
Definition: nano_gfx_types.h:35