LNXCORE/v8/include/libwebsockets/lws-ssd1306-i2c.h
2025-01-22 17:22:38 +01:00

65 lines
2.3 KiB
C

/*
* lws abstract display implementation for ssd1306 on i2c
*
* Copyright (C) 2019 - 2022 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#if !defined(__LWS_DISPLAY_SSD1306_I2C_H__)
#define __LWS_DISPLAY_SSD1306_I2C_H__
/*
* D/C# pin on SSD1306 sets the I2C device ads
* from these two options (7-bit address)
*/
#define SSD1306_I2C7_ADS1 0x3c
#define SSD1306_I2C7_ADS2 0x3d
typedef struct lws_display_ssd1306 {
lws_display_t disp; /* use lws_display_ssd1306_ops to set ops */
const lws_i2c_ops_t *i2c; /* i2c ops */
lws_display_completion_t cb;
const lws_gpio_ops_t *gpio; /* NULL or gpio ops */
_lws_plat_gpio_t reset_gpio; /* if gpio ops, nReset gpio # */
uint8_t i2c7_address; /* one of SSD1306_I2C7_ADS... */
} lws_display_ssd1306_t;
int
lws_display_ssd1306_i2c_init(lws_display_state_t *lds);
int
lws_display_ssd1306_i2c_contrast(lws_display_state_t *lds, uint8_t b);
int
lws_display_ssd1306_i2c_blit(lws_display_state_t *lds, const uint8_t *src,
lws_box_t *box, lws_dll2_owner_t *ids);
int
lws_display_ssd1306_i2c_power(lws_display_state_t *lds, int state);
#define lws_display_ssd1306_ops \
.init = lws_display_ssd1306_i2c_init, \
.contrast = lws_display_ssd1306_i2c_contrast, \
.blit = lws_display_ssd1306_i2c_blit, \
.power = lws_display_ssd1306_i2c_power
#endif