blob: 3efff6d0e3487fef297b4fdb67abe72676020b12 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/**
* Simple API for scrolling lines. Keeps things simple by not even assuming
* which screen is being drawn on.
*/
#ifndef DEVICE_SCREEN_H
#define DEVICE_SCREEN_H
#include <time.h>
#include <OLEDDisplay.h>
#include <Wire.h>
#define SCREEN_WIDTH (128)
#define SCREEN_HEIGHT (32)
#define FONT_WIDTH (8)
#define FONT_HEIGHT (16)
#define SCREEN_LINE_COUNT (SCREEN_HEIGHT / FONT_HEIGHT)
#define SCREEN_LINE_CHARS (SCREEN_WIDTH / FONT_WIDTH)
#define SCREEN_TOTAL_CHARS (SCREEN_LINE_COUNT * SCREEN_LINE_CHARS)
#define MESSAGE_MAX (1023)
/**
* Struct that keeps track of the lines on the screen.
*/
struct display_status {
OLEDDisplay *screen;
unsigned long period; /* milliseconds/Line */
unsigned long last_scroll_time;
char message[MESSAGE_MAX + 1]; /* Entire message to be shown */
char lines[SCREEN_LINE_COUNT][SCREEN_LINE_CHARS + 1];
char *cursor; /* the begining of the *next* location in the message to be shown*/
size_t msg_len;
size_t remaining; /* offset of the next part of text to be shown */
};
/**
* Displays scrolling text on the screen.
*/
int display_update_scroll(struct display_status *status);
#define END_OF_MESSAGE (1 << 0)
/**
* Initialises display_status structure so it can be used for
* display_update_scroll.
*
* screen - screen to draw on
*
* status - structure to Initialise
*
* msg - message to scroll on the screen
*
* size - length of the message
*
* period - time between [elder] scrolls
*/
void display_status_init(OLEDDisplay *screen, struct display_status *status, char *msg, size_t size, unsigned long int period);
#endif /* DEVICE_SCREEN_H */
|
