1/*
2 * lws abstract display implementation for ssd1306 on i2c
3 *
4 * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
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
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell 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
14 * all 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
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#if !defined(__LWS_DISPLAY_SSD1306_I2C_H__)
26#define __LWS_DISPLAY_SSD1306_I2C_H__
27
28/*
29 * D/C# pin on SSD1306 sets the I2C device ads
30 * from these two options (7-bit address)
31 */
32
33#define SSD1306_I2C7_ADS1 0x3c
34#define SSD1306_I2C7_ADS2 0x3d
35
36typedef struct lws_display_ssd1306 {
37
38 lws_display_t disp; /* use lws_display_ssd1306_ops to set ops */
39 const lws_i2c_ops_t *i2c; /* i2c ops */
40
41 const lws_gpio_ops_t *gpio; /* NULL or gpio ops */
42 _lws_plat_gpio_t reset_gpio; /* if gpio ops, nReset gpio # */
43
44 uint8_t i2c7_address; /* one of SSD1306_I2C7_ADS... */
45
46} lws_display_ssd1306_t;
47
48int
49lws_display_ssd1306_i2c_init(const struct lws_display *disp);
50int
51lws_display_ssd1306_i2c_contrast(const struct lws_display *disp, uint8_t b);
52int
53lws_display_ssd1306_i2c_blit(const struct lws_display *disp, const uint8_t *src,
54 lws_display_scalar x, lws_display_scalar y,
55 lws_display_scalar w, lws_display_scalar h);
56int
57lws_display_ssd1306_i2c_power(const struct lws_display *disp, int state);
58
59#define lws_display_ssd1306_ops \
60 .init = lws_display_ssd1306_i2c_init, \
61 .contrast = lws_display_ssd1306_i2c_contrast, \
62 .blit = lws_display_ssd1306_i2c_blit, \
63 .power = lws_display_ssd1306_i2c_power
64#endif
65