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 36 typedef 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 48 int 49 lws_display_ssd1306_i2c_init(const struct lws_display *disp); 50 int 51 lws_display_ssd1306_i2c_contrast(const struct lws_display *disp, uint8_t b); 52 int 53 lws_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); 56 int 57 lws_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