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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#include <string.h>
#include "shared-module/displayio/__init__.h"
#include "lib/utils/interrupt_char.h"
#include "py/reload.h"
#include "py/runtime.h"
#include "shared-bindings/displayio/Bitmap.h"
#include "shared-bindings/displayio/Display.h"
#include "shared-bindings/displayio/Group.h"
#include "shared-bindings/displayio/Palette.h"
#include "supervisor/shared/autoreload.h"
#include "supervisor/shared/display.h"
#include "supervisor/memory.h"
#include "supervisor/usb.h"
primary_display_t displays[CIRCUITPY_DISPLAY_LIMIT];
static inline void swap(uint16_t* a, uint16_t* b) {
uint16_t temp = *a;
*a = *b;
*b = temp;
}
// Check for recursive calls to displayio_refresh_displays.
bool refresh_displays_in_progress = false;
void displayio_refresh_displays(void) {
if (mp_hal_is_interrupted()) {
return;
}
if (reload_requested) {
// Reload is about to happen, so don't redisplay.
return;
}
if (refresh_displays_in_progress) {
// Don't allow recursive calls to this routine.
return;
}
refresh_displays_in_progress = true;
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].display.base.type == NULL || displays[i].display.base.type == &mp_type_NoneType) {
// Skip null display.
continue;
}
displayio_display_obj_t* display = &displays[i].display;
displayio_display_update_backlight(display);
// Time to refresh at specified frame rate?
if (!displayio_display_frame_queued(display)) {
// Too soon. Try next display.
continue;
}
if (displayio_display_refresh_queued(display)) {
// We compute the pixels. r and c are row and column to match the display memory
// structure. x and y match location within the groups.
uint16_t c0 = 0;
uint16_t r0 = 0;
uint16_t c1 = display->width;
uint16_t r1 = display->height;
if (display->transpose_xy) {
swap(&c1, &r1);
}
if (!displayio_display_begin_transaction(display)) {
// Can't acquire display bus; skip updating this display. Try next display.
continue;
}
displayio_display_set_region_to_update(display, c0, r0, c1, r1);
displayio_display_end_transaction(display);
uint16_t x0 = 0;
uint16_t x1 = display->width - 1;
uint16_t startx = 0;
int8_t dx = 1;
if (display->mirror_x) {
dx = -1;
startx = x1;
}
uint16_t y0 = 0;
uint16_t y1 = display->height - 1;
uint16_t starty = 0;
int8_t dy = 1;
if (display->mirror_y) {
dy = -1;
starty = y1;
}
bool transpose = false;
if (display->transpose_xy) {
transpose = true;
int8_t temp_dx = dx;
dx = dy;
dy = temp_dx;
swap(&starty, &startx);
swap(&x0, &y0);
swap(&x1, &y1);
}
size_t index = 0;
uint16_t buffer_size = 256;
uint32_t buffer[buffer_size / 2];
bool skip_this_display = false;
for (uint16_t y = starty; y0 <= y && y <= y1; y += dy) {
for (uint16_t x = startx; x0 <= x && x <= x1; x += dx) {
uint16_t* pixel = &(((uint16_t*)buffer)[index]);
*pixel = 0;
if (display->current_group != NULL) {
if (transpose) {
displayio_group_get_pixel(display->current_group, y, x, pixel);
} else {
displayio_group_get_pixel(display->current_group, x, y, pixel);
}
}
index += 1;
// The buffer is full, send it.
if (index >= buffer_size) {
if (!displayio_display_begin_transaction(display)) {
// Can't acquire display bus; skip the rest of the data. Try next display.
index = 0;
skip_this_display = true;
break;
}
displayio_display_send_pixels(display, buffer, buffer_size / 2);
displayio_display_end_transaction(display);
// TODO(tannewt): Make refresh displays faster so we don't starve other
// background tasks.
usb_background();
index = 0;
}
}
}
if (skip_this_display) {
// Go on to next display.
continue;
}
// Send the remaining data.
if (index) {
if (!displayio_display_begin_transaction(display)) {
// Can't get display bus. Skip the rest of the data. Try next display.
continue;
}
displayio_display_send_pixels(display, buffer, index * 2);
}
displayio_display_end_transaction(display);
}
displayio_display_finish_refresh(display);
}
// All done.
refresh_displays_in_progress = false;
}
void common_hal_displayio_release_displays(void) {
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
mp_const_obj_t bus_type = displays[i].fourwire_bus.base.type;
if (bus_type == NULL) {
continue;
} else if (bus_type == &displayio_fourwire_type) {
common_hal_displayio_fourwire_deinit(&displays[i].fourwire_bus);
} else if (bus_type == &displayio_parallelbus_type) {
common_hal_displayio_parallelbus_deinit(&displays[i].parallel_bus);
}
displays[i].fourwire_bus.base.type = &mp_type_NoneType;
}
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
release_display(&displays[i].display);
displays[i].display.base.type = &mp_type_NoneType;
}
supervisor_stop_terminal();
}
void reset_displays(void) {
#if CIRCUITPY_DISPLAYIO
// The SPI buses used by FourWires may be allocated on the heap so we need to move them inline.
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].fourwire_bus.base.type != &displayio_fourwire_type) {
continue;
}
displayio_fourwire_obj_t* fourwire = &displays[i].fourwire_bus;
if (((uint32_t) fourwire->bus) < ((uint32_t) &displays) ||
((uint32_t) fourwire->bus) > ((uint32_t) &displays + CIRCUITPY_DISPLAY_LIMIT)) {
busio_spi_obj_t* original_spi = fourwire->bus;
if (original_spi == board_spi()) {
continue;
}
memcpy(&fourwire->inline_bus, original_spi, sizeof(busio_spi_obj_t));
fourwire->bus = &fourwire->inline_bus;
// Check for other displays that use the same spi bus and swap them too.
for (uint8_t j = i + 1; j < CIRCUITPY_DISPLAY_LIMIT; j++) {
if (displays[i].fourwire_bus.bus == original_spi) {
displays[i].fourwire_bus.bus = &fourwire->inline_bus;
}
}
}
}
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].display.base.type == NULL) {
continue;
}
displayio_display_obj_t* display = &displays[i].display;
display->auto_brightness = true;
common_hal_displayio_display_show(display, &circuitpython_splash);
}
#endif
}
|
