From 05d8885a1ab959fabdbb77f99408b2e7dc78b97c Mon Sep 17 00:00:00 2001 From: Scott Shawcroft Date: Wed, 16 Jan 2019 12:04:42 -0800 Subject: Rework displays in prep for dynamic support and 8bit parallel. --- shared-module/displayio/Display.c | 149 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 shared-module/displayio/Display.c (limited to 'shared-module/displayio/Display.c') diff --git a/shared-module/displayio/Display.c b/shared-module/displayio/Display.c new file mode 100644 index 000000000..0a14e74bb --- /dev/null +++ b/shared-module/displayio/Display.c @@ -0,0 +1,149 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries + * + * 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. + */ + +#include "shared-bindings/displayio/Display.h" + +#include "py/runtime.h" +#include "shared-bindings/displayio/FourWire.h" +#include "shared-bindings/displayio/ParallelBus.h" + +#include + +#include "tick.h" + +#define DELAY 0x80 + +void common_hal_displayio_display_construct(displayio_display_obj_t* self, + mp_obj_t bus, uint16_t width, uint16_t height, int16_t colstart, int16_t rowstart, + uint16_t color_depth, uint8_t set_column_command, uint8_t set_row_command, + uint8_t write_ram_command, uint8_t* init_sequence, uint16_t init_sequence_len) { + self->width = width; + self->height = height; + self->color_depth = color_depth; + self->set_column_command = set_column_command; + self->set_row_command = set_row_command; + self->write_ram_command = write_ram_command; + self->current_group = NULL; + self->colstart = colstart; + self->rowstart = rowstart; + + if (MP_OBJ_IS_TYPE(bus, &displayio_parallelbus_type)) { + self->begin_transaction = common_hal_displayio_parallelbus_begin_transaction; + self->send = common_hal_displayio_parallelbus_send; + self->end_transaction = common_hal_displayio_parallelbus_end_transaction; + } else if (MP_OBJ_IS_TYPE(bus, &displayio_fourwire_type)) { + self->begin_transaction = common_hal_displayio_fourwire_begin_transaction; + self->send = common_hal_displayio_fourwire_send; + self->end_transaction = common_hal_displayio_fourwire_end_transaction; + } else { + mp_raise_ValueError(translate("Unsupported display bus type")); + } + self->bus = bus; + + uint32_t i = 0; + self->begin_transaction(self->bus); + while (i < init_sequence_len) { + uint8_t *cmd = init_sequence + i; + uint8_t data_size = *(cmd + 1); + bool delay = (data_size & DELAY) != 0; + data_size &= ~DELAY; + uint8_t *data = cmd + 2; + self->send(self->bus, true, cmd, 1); + self->send(self->bus, false, data, data_size); + if (delay) { + data_size++; + uint16_t delay_length_ms = *(cmd + 1 + data_size); + if (delay_length_ms == 255) { + delay_length_ms = 500; + } + uint64_t start = ticks_ms; + while (ticks_ms - start < delay_length_ms) {} + } else { + uint64_t start = ticks_ms; + while (ticks_ms - start < 10) {} + } + i += 2 + data_size; + } + self->end_transaction(self->bus); +} + +void common_hal_displayio_display_show(displayio_display_obj_t* self, displayio_group_t* root_group) { + self->current_group = root_group; + common_hal_displayio_display_refresh_soon(self); +} + +void common_hal_displayio_display_refresh_soon(displayio_display_obj_t* self) { + self->refresh = true; +} + +int32_t common_hal_displayio_display_wait_for_frame(displayio_display_obj_t* self) { + uint64_t last_refresh = self->last_refresh; + while (last_refresh == self->last_refresh) { + MICROPY_VM_HOOK_LOOP + } + return 0; +} + +void displayio_display_start_region_update(displayio_display_obj_t* self, uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) { + // TODO(tannewt): Handle displays with single byte bounds. + self->begin_transaction(self->bus); + uint16_t data[2]; + self->send(self->bus, true, &self->set_column_command, 1); + data[0] = __builtin_bswap16(x0 + self->colstart); + data[1] = __builtin_bswap16(x1 + self->colstart); + self->send(self->bus, false, (uint8_t*) data, 4); + self->send(self->bus, true, &self->set_row_command, 1); + data[0] = __builtin_bswap16(y0 + self->rowstart); + data[1] = __builtin_bswap16(y1 + self->rowstart); + self->send(self->bus, false, (uint8_t*) data, 4); + self->send(self->bus, true, &self->write_ram_command, 1); +} + +void displayio_display_finish_region_update(displayio_display_obj_t* self) { + self->end_transaction(self->bus); +} + +bool displayio_display_frame_queued(displayio_display_obj_t* self) { + // Refresh at ~30 fps. + return (ticks_ms - self->last_refresh) > 32; +} + +bool displayio_display_refresh_queued(displayio_display_obj_t* self) { + return self->refresh || (self->current_group != NULL && displayio_group_needs_refresh(self->current_group)); +} + +void displayio_display_finish_refresh(displayio_display_obj_t* self) { + if (self->current_group != NULL) { + displayio_group_finish_refresh(self->current_group); + } + self->refresh = false; + self->last_refresh = ticks_ms; +} + +bool displayio_display_send_pixels(displayio_display_obj_t* self, uint32_t* pixels, uint32_t length) { + self->send(self->bus, false, (uint8_t*) pixels, length * 4); + return true; +} -- cgit v1.2.3