1 /*
2 * Copyright (c) 2018 PHYTEC Messtechnik GmbH
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/device.h>
9 #include <zephyr/display/cfb.h>
10 #include <stdio.h>
11
main(void)12 int main(void)
13 {
14 const struct device *dev;
15 uint16_t x_res;
16 uint16_t y_res;
17 uint16_t rows;
18 uint8_t ppt;
19 uint8_t font_width;
20 uint8_t font_height;
21
22 dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display));
23 if (!device_is_ready(dev)) {
24 printf("Device %s not ready\n", dev->name);
25 return 0;
26 }
27
28 if (display_set_pixel_format(dev, PIXEL_FORMAT_MONO10) != 0) {
29 if (display_set_pixel_format(dev, PIXEL_FORMAT_MONO01) != 0) {
30 printf("Failed to set required pixel format");
31 return 0;
32 }
33 }
34
35 printf("Initialized %s\n", dev->name);
36
37 if (cfb_framebuffer_init(dev)) {
38 printf("Framebuffer initialization failed!\n");
39 return 0;
40 }
41
42 cfb_framebuffer_clear(dev, true);
43
44 display_blanking_off(dev);
45
46 x_res = cfb_get_display_parameter(dev, CFB_DISPLAY_WIDTH);
47 y_res = cfb_get_display_parameter(dev, CFB_DISPLAY_HEIGH);
48 rows = cfb_get_display_parameter(dev, CFB_DISPLAY_ROWS);
49 ppt = cfb_get_display_parameter(dev, CFB_DISPLAY_PPT);
50
51 for (int idx = 0; idx < 42; idx++) {
52 if (cfb_get_font_size(dev, idx, &font_width, &font_height)) {
53 break;
54 }
55 cfb_framebuffer_set_font(dev, idx);
56 printf("font width %d, font height %d\n",
57 font_width, font_height);
58 }
59
60 printf("x_res %d, y_res %d, ppt %d, rows %d, cols %d\n",
61 x_res,
62 y_res,
63 ppt,
64 rows,
65 cfb_get_display_parameter(dev, CFB_DISPLAY_COLS));
66
67 cfb_framebuffer_invert(dev);
68
69 cfb_set_kerning(dev, 3);
70
71 while (1) {
72 for (int i = 0; i < MIN(x_res, y_res); i++) {
73 cfb_framebuffer_clear(dev, false);
74 if (cfb_print(dev,
75 "0123456789mMgj!\"§$%&/()=",
76 i, i)) {
77 printf("Failed to print a string\n");
78 continue;
79 }
80
81 cfb_framebuffer_finalize(dev);
82 #if defined(CONFIG_ARCH_POSIX)
83 k_sleep(K_MSEC(20));
84 #endif
85 }
86 }
87 return 0;
88 }
89
