#include #include "shared-module/displayio/__init__.h" #include "lib/utils/interrupt_char.h" #include "py/reload.h" #include "py/runtime.h" #include "shared-bindings/board/__init__.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 BOARD_SPI // We don't need to move original_spi if it is the board.SPI object because it is // statically allocated already. (Doing so would also make it impossible to reference in // a subsequent VM run.) if (original_spi == common_hal_board_get_spi()) { continue; } #endif 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 }